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      1 /**
      2  * @file
      3  *
      4  * lwIP Options Configuration
      5  */
      6 
      7 /*
      8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
      9  * All rights reserved.
     10  *
     11  * Redistribution and use in source and binary forms, with or without modification,
     12  * are permitted provided that the following conditions are met:
     13  *
     14  * 1. Redistributions of source code must retain the above copyright notice,
     15  *    this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright notice,
     17  *    this list of conditions and the following disclaimer in the documentation
     18  *    and/or other materials provided with the distribution.
     19  * 3. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
     25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
     27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
     31  * OF SUCH DAMAGE.
     32  *
     33  * This file is part of the lwIP TCP/IP stack.
     34  *
     35  * Author: Adam Dunkels <adam (at) sics.se>
     36  *
     37  */
     38 #ifndef __LWIP_OPT_H__
     39 #define __LWIP_OPT_H__
     40 
     41 /*
     42  * Include user defined options first. Anything not defined in these files
     43  * will be set to standard values. Override anything you dont like!
     44  */
     45 #include "lwipopts.h"
     46 #include "lwip/debug.h"
     47 
     48 /*
     49    -----------------------------------------------
     50    ---------- Platform specific locking ----------
     51    -----------------------------------------------
     52 */
     53 
     54 /**
     55  * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
     56  * critical regions during buffer allocation, deallocation and memory
     57  * allocation and deallocation.
     58  */
     59 #ifndef SYS_LIGHTWEIGHT_PROT
     60 #define SYS_LIGHTWEIGHT_PROT            0
     61 #endif
     62 
     63 /**
     64  * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
     65  * use lwIP facilities.
     66  */
     67 #ifndef NO_SYS
     68 #define NO_SYS                          0
     69 #endif
     70 
     71 /**
     72  * NO_SYS_NO_TIMERS==1: Drop support for sys_timeout when NO_SYS==1
     73  * Mainly for compatibility to old versions.
     74  */
     75 #ifndef NO_SYS_NO_TIMERS
     76 #define NO_SYS_NO_TIMERS                0
     77 #endif
     78 
     79 /**
     80  * MEMCPY: override this if you have a faster implementation at hand than the
     81  * one included in your C library
     82  */
     83 #ifndef MEMCPY
     84 #define MEMCPY(dst,src,len)             memcpy(dst,src,len)
     85 #endif
     86 
     87 /**
     88  * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a
     89  * call to memcpy() if the length is known at compile time and is small.
     90  */
     91 #ifndef SMEMCPY
     92 #define SMEMCPY(dst,src,len)            memcpy(dst,src,len)
     93 #endif
     94 
     95 /*
     96    ------------------------------------
     97    ---------- Memory options ----------
     98    ------------------------------------
     99 */
    100 /**
    101  * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library
    102  * instead of the lwip internal allocator. Can save code size if you
    103  * already use it.
    104  */
    105 #ifndef MEM_LIBC_MALLOC
    106 #define MEM_LIBC_MALLOC                 0
    107 #endif
    108 
    109 /**
    110 * MEMP_MEM_MALLOC==1: Use mem_malloc/mem_free instead of the lwip pool allocator.
    111 * Especially useful with MEM_LIBC_MALLOC but handle with care regarding execution
    112 * speed and usage from interrupts!
    113 */
    114 #ifndef MEMP_MEM_MALLOC
    115 #define MEMP_MEM_MALLOC                 0
    116 #endif
    117 
    118 /**
    119  * MEM_ALIGNMENT: should be set to the alignment of the CPU
    120  *    4 byte alignment -> #define MEM_ALIGNMENT 4
    121  *    2 byte alignment -> #define MEM_ALIGNMENT 2
    122  */
    123 #ifndef MEM_ALIGNMENT
    124 #define MEM_ALIGNMENT                   1
    125 #endif
    126 
    127 /**
    128  * MEM_SIZE: the size of the heap memory. If the application will send
    129  * a lot of data that needs to be copied, this should be set high.
    130  */
    131 #ifndef MEM_SIZE
    132 #define MEM_SIZE                        1600
    133 #endif
    134 
    135 /**
    136  * MEMP_SEPARATE_POOLS: if defined to 1, each pool is placed in its own array.
    137  * This can be used to individually change the location of each pool.
    138  * Default is one big array for all pools
    139  */
    140 #ifndef MEMP_SEPARATE_POOLS
    141 #define MEMP_SEPARATE_POOLS             0
    142 #endif
    143 
    144 /**
    145  * MEMP_OVERFLOW_CHECK: memp overflow protection reserves a configurable
    146  * amount of bytes before and after each memp element in every pool and fills
    147  * it with a prominent default value.
    148  *    MEMP_OVERFLOW_CHECK == 0 no checking
    149  *    MEMP_OVERFLOW_CHECK == 1 checks each element when it is freed
    150  *    MEMP_OVERFLOW_CHECK >= 2 checks each element in every pool every time
    151  *      memp_malloc() or memp_free() is called (useful but slow!)
    152  */
    153 #ifndef MEMP_OVERFLOW_CHECK
    154 #define MEMP_OVERFLOW_CHECK             0
    155 #endif
    156 
    157 /**
    158  * MEMP_SANITY_CHECK==1: run a sanity check after each memp_free() to make
    159  * sure that there are no cycles in the linked lists.
    160  */
    161 #ifndef MEMP_SANITY_CHECK
    162 #define MEMP_SANITY_CHECK               0
    163 #endif
    164 
    165 /**
    166  * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set
    167  * of memory pools of various sizes. When mem_malloc is called, an element of
    168  * the smallest pool that can provide the length needed is returned.
    169  * To use this, MEMP_USE_CUSTOM_POOLS also has to be enabled.
    170  */
    171 #ifndef MEM_USE_POOLS
    172 #define MEM_USE_POOLS                   0
    173 #endif
    174 
    175 /**
    176  * MEM_USE_POOLS_TRY_BIGGER_POOL==1: if one malloc-pool is empty, try the next
    177  * bigger pool - WARNING: THIS MIGHT WASTE MEMORY but it can make a system more
    178  * reliable. */
    179 #ifndef MEM_USE_POOLS_TRY_BIGGER_POOL
    180 #define MEM_USE_POOLS_TRY_BIGGER_POOL   0
    181 #endif
    182 
    183 /**
    184  * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h
    185  * that defines additional pools beyond the "standard" ones required
    186  * by lwIP. If you set this to 1, you must have lwippools.h in your
    187  * inlude path somewhere.
    188  */
    189 #ifndef MEMP_USE_CUSTOM_POOLS
    190 #define MEMP_USE_CUSTOM_POOLS           0
    191 #endif
    192 
    193 /**
    194  * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from
    195  * interrupt context (or another context that doesn't allow waiting for a
    196  * semaphore).
    197  * If set to 1, mem_malloc will be protected by a semaphore and SYS_ARCH_PROTECT,
    198  * while mem_free will only use SYS_ARCH_PROTECT. mem_malloc SYS_ARCH_UNPROTECTs
    199  * with each loop so that mem_free can run.
    200  *
    201  * ATTENTION: As you can see from the above description, this leads to dis-/
    202  * enabling interrupts often, which can be slow! Also, on low memory, mem_malloc
    203  * can need longer.
    204  *
    205  * If you don't want that, at least for NO_SYS=0, you can still use the following
    206  * functions to enqueue a deallocation call which then runs in the tcpip_thread
    207  * context:
    208  * - pbuf_free_callback(p);
    209  * - mem_free_callback(m);
    210  */
    211 #ifndef LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
    212 #define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 0
    213 #endif
    214 
    215 /*
    216    ------------------------------------------------
    217    ---------- Internal Memory Pool Sizes ----------
    218    ------------------------------------------------
    219 */
    220 /**
    221  * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
    222  * If the application sends a lot of data out of ROM (or other static memory),
    223  * this should be set high.
    224  */
    225 #ifndef MEMP_NUM_PBUF
    226 #define MEMP_NUM_PBUF                   16
    227 #endif
    228 
    229 /**
    230  * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
    231  * (requires the LWIP_RAW option)
    232  */
    233 #ifndef MEMP_NUM_RAW_PCB
    234 #define MEMP_NUM_RAW_PCB                4
    235 #endif
    236 
    237 /**
    238  * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
    239  * per active UDP "connection".
    240  * (requires the LWIP_UDP option)
    241  */
    242 #ifndef MEMP_NUM_UDP_PCB
    243 #define MEMP_NUM_UDP_PCB                4
    244 #endif
    245 
    246 /**
    247  * MEMP_NUM_TCP_PCB: the number of simulatenously active TCP connections.
    248  * (requires the LWIP_TCP option)
    249  */
    250 #ifndef MEMP_NUM_TCP_PCB
    251 #define MEMP_NUM_TCP_PCB                5
    252 #endif
    253 
    254 /**
    255  * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
    256  * (requires the LWIP_TCP option)
    257  */
    258 #ifndef MEMP_NUM_TCP_PCB_LISTEN
    259 #define MEMP_NUM_TCP_PCB_LISTEN         8
    260 #endif
    261 
    262 /**
    263  * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
    264  * (requires the LWIP_TCP option)
    265  */
    266 #ifndef MEMP_NUM_TCP_SEG
    267 #define MEMP_NUM_TCP_SEG                16
    268 #endif
    269 
    270 /**
    271  * MEMP_NUM_REASSDATA: the number of IP packets simultaneously queued for
    272  * reassembly (whole packets, not fragments!)
    273  */
    274 #ifndef MEMP_NUM_REASSDATA
    275 #define MEMP_NUM_REASSDATA              5
    276 #endif
    277 
    278 /**
    279  * MEMP_NUM_FRAG_PBUF: the number of IP fragments simultaneously sent
    280  * (fragments, not whole packets!).
    281  * This is only used with IP_FRAG_USES_STATIC_BUF==0 and
    282  * LWIP_NETIF_TX_SINGLE_PBUF==0 and only has to be > 1 with DMA-enabled MACs
    283  * where the packet is not yet sent when netif->output returns.
    284  */
    285 #ifndef MEMP_NUM_FRAG_PBUF
    286 #define MEMP_NUM_FRAG_PBUF              15
    287 #endif
    288 
    289 /**
    290  * MEMP_NUM_ARP_QUEUE: the number of simulateously queued outgoing
    291  * packets (pbufs) that are waiting for an ARP request (to resolve
    292  * their destination address) to finish.
    293  * (requires the ARP_QUEUEING option)
    294  */
    295 #ifndef MEMP_NUM_ARP_QUEUE
    296 #define MEMP_NUM_ARP_QUEUE              30
    297 #endif
    298 
    299 /**
    300  * MEMP_NUM_IGMP_GROUP: The number of multicast groups whose network interfaces
    301  * can be members et the same time (one per netif - allsystems group -, plus one
    302  * per netif membership).
    303  * (requires the LWIP_IGMP option)
    304  */
    305 #ifndef MEMP_NUM_IGMP_GROUP
    306 #define MEMP_NUM_IGMP_GROUP             8
    307 #endif
    308 
    309 /**
    310  * MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts.
    311  * (requires NO_SYS==0)
    312  */
    313 #ifndef MEMP_NUM_SYS_TIMEOUT
    314 #define MEMP_NUM_SYS_TIMEOUT            3
    315 #endif
    316 
    317 /**
    318  * MEMP_NUM_NETBUF: the number of struct netbufs.
    319  * (only needed if you use the sequential API, like api_lib.c)
    320  */
    321 #ifndef MEMP_NUM_NETBUF
    322 #define MEMP_NUM_NETBUF                 2
    323 #endif
    324 
    325 /**
    326  * MEMP_NUM_NETCONN: the number of struct netconns.
    327  * (only needed if you use the sequential API, like api_lib.c)
    328  */
    329 #ifndef MEMP_NUM_NETCONN
    330 #define MEMP_NUM_NETCONN                4
    331 #endif
    332 
    333 /**
    334  * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used
    335  * for callback/timeout API communication.
    336  * (only needed if you use tcpip.c)
    337  */
    338 #ifndef MEMP_NUM_TCPIP_MSG_API
    339 #define MEMP_NUM_TCPIP_MSG_API          8
    340 #endif
    341 
    342 /**
    343  * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used
    344  * for incoming packets.
    345  * (only needed if you use tcpip.c)
    346  */
    347 #ifndef MEMP_NUM_TCPIP_MSG_INPKT
    348 #define MEMP_NUM_TCPIP_MSG_INPKT        8
    349 #endif
    350 
    351 /**
    352  * MEMP_NUM_SNMP_NODE: the number of leafs in the SNMP tree.
    353  */
    354 #ifndef MEMP_NUM_SNMP_NODE
    355 #define MEMP_NUM_SNMP_NODE              50
    356 #endif
    357 
    358 /**
    359  * MEMP_NUM_SNMP_ROOTNODE: the number of branches in the SNMP tree.
    360  * Every branch has one leaf (MEMP_NUM_SNMP_NODE) at least!
    361  */
    362 #ifndef MEMP_NUM_SNMP_ROOTNODE
    363 #define MEMP_NUM_SNMP_ROOTNODE          30
    364 #endif
    365 
    366 /**
    367  * MEMP_NUM_SNMP_VARBIND: the number of concurrent requests (does not have to
    368  * be changed normally) - 2 of these are used per request (1 for input,
    369  * 1 for output)
    370  */
    371 #ifndef MEMP_NUM_SNMP_VARBIND
    372 #define MEMP_NUM_SNMP_VARBIND           2
    373 #endif
    374 
    375 /**
    376  * MEMP_NUM_SNMP_VALUE: the number of OID or values concurrently used
    377  * (does not have to be changed normally) - 3 of these are used per request
    378  * (1 for the value read and 2 for OIDs - input and output)
    379  */
    380 #ifndef MEMP_NUM_SNMP_VALUE
    381 #define MEMP_NUM_SNMP_VALUE             3
    382 #endif
    383 
    384 /**
    385  * MEMP_NUM_NETDB: the number of concurrently running lwip_addrinfo() calls
    386  * (before freeing the corresponding memory using lwip_freeaddrinfo()).
    387  */
    388 #ifndef MEMP_NUM_NETDB
    389 #define MEMP_NUM_NETDB                  1
    390 #endif
    391 
    392 /**
    393  * MEMP_NUM_LOCALHOSTLIST: the number of host entries in the local host list
    394  * if DNS_LOCAL_HOSTLIST_IS_DYNAMIC==1.
    395  */
    396 #ifndef MEMP_NUM_LOCALHOSTLIST
    397 #define MEMP_NUM_LOCALHOSTLIST          1
    398 #endif
    399 
    400 /**
    401  * MEMP_NUM_PPPOE_INTERFACES: the number of concurrently active PPPoE
    402  * interfaces (only used with PPPOE_SUPPORT==1)
    403  */
    404 #ifndef MEMP_NUM_PPPOE_INTERFACES
    405 #define MEMP_NUM_PPPOE_INTERFACES       1
    406 #endif
    407 
    408 /**
    409  * PBUF_POOL_SIZE: the number of buffers in the pbuf pool.
    410  */
    411 #ifndef PBUF_POOL_SIZE
    412 #define PBUF_POOL_SIZE                  16
    413 #endif
    414 
    415 /*
    416    ---------------------------------
    417    ---------- ARP options ----------
    418    ---------------------------------
    419 */
    420 /**
    421  * LWIP_ARP==1: Enable ARP functionality.
    422  */
    423 #ifndef LWIP_ARP
    424 #define LWIP_ARP                        1
    425 #endif
    426 
    427 /**
    428  * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached.
    429  */
    430 #ifndef ARP_TABLE_SIZE
    431 #define ARP_TABLE_SIZE                  10
    432 #endif
    433 
    434 /**
    435  * ARP_QUEUEING==1: Multiple outgoing packets are queued during hardware address
    436  * resolution. By default, only the most recent packet is queued per IP address.
    437  * This is sufficient for most protocols and mainly reduces TCP connection
    438  * startup time. Set this to 1 if you know your application sends more than one
    439  * packet in a row to an IP address that is not in the ARP cache.
    440  */
    441 #ifndef ARP_QUEUEING
    442 #define ARP_QUEUEING                    0
    443 #endif
    444 
    445 /**
    446  * ETHARP_TRUST_IP_MAC==1: Incoming IP packets cause the ARP table to be
    447  * updated with the source MAC and IP addresses supplied in the packet.
    448  * You may want to disable this if you do not trust LAN peers to have the
    449  * correct addresses, or as a limited approach to attempt to handle
    450  * spoofing. If disabled, lwIP will need to make a new ARP request if
    451  * the peer is not already in the ARP table, adding a little latency.
    452  * The peer *is* in the ARP table if it requested our address before.
    453  * Also notice that this slows down input processing of every IP packet!
    454  */
    455 #ifndef ETHARP_TRUST_IP_MAC
    456 #define ETHARP_TRUST_IP_MAC             0
    457 #endif
    458 
    459 /**
    460  * ETHARP_SUPPORT_VLAN==1: support receiving ethernet packets with VLAN header.
    461  * Additionally, you can define ETHARP_VLAN_CHECK to an u16_t VLAN ID to check.
    462  * If ETHARP_VLAN_CHECK is defined, only VLAN-traffic for this VLAN is accepted.
    463  * If ETHARP_VLAN_CHECK is not defined, all traffic is accepted.
    464  */
    465 #ifndef ETHARP_SUPPORT_VLAN
    466 #define ETHARP_SUPPORT_VLAN             0
    467 #endif
    468 
    469 /** LWIP_ETHERNET==1: enable ethernet support for PPPoE even though ARP
    470  * might be disabled
    471  */
    472 #ifndef LWIP_ETHERNET
    473 #define LWIP_ETHERNET                   (LWIP_ARP || PPPOE_SUPPORT)
    474 #endif
    475 
    476 /** ETH_PAD_SIZE: number of bytes added before the ethernet header to ensure
    477  * alignment of payload after that header. Since the header is 14 bytes long,
    478  * without this padding e.g. addresses in the IP header will not be aligned
    479  * on a 32-bit boundary, so setting this to 2 can speed up 32-bit-platforms.
    480  */
    481 #ifndef ETH_PAD_SIZE
    482 #define ETH_PAD_SIZE                    0
    483 #endif
    484 
    485 /** ETHARP_SUPPORT_STATIC_ENTRIES==1: enable code to support static ARP table
    486  * entries (using etharp_add_static_entry/etharp_remove_static_entry).
    487  */
    488 #ifndef ETHARP_SUPPORT_STATIC_ENTRIES
    489 #define ETHARP_SUPPORT_STATIC_ENTRIES   0
    490 #endif
    491 
    492 
    493 /*
    494    --------------------------------
    495    ---------- IP options ----------
    496    --------------------------------
    497 */
    498 /**
    499  * IP_FORWARD==1: Enables the ability to forward IP packets across network
    500  * interfaces. If you are going to run lwIP on a device with only one network
    501  * interface, define this to 0.
    502  */
    503 #ifndef IP_FORWARD
    504 #define IP_FORWARD                      0
    505 #endif
    506 
    507 /**
    508  * IP_OPTIONS_ALLOWED: Defines the behavior for IP options.
    509  *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
    510  *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
    511  */
    512 #ifndef IP_OPTIONS_ALLOWED
    513 #define IP_OPTIONS_ALLOWED              1
    514 #endif
    515 
    516 /**
    517  * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
    518  * this option does not affect outgoing packet sizes, which can be controlled
    519  * via IP_FRAG.
    520  */
    521 #ifndef IP_REASSEMBLY
    522 #define IP_REASSEMBLY                   1
    523 #endif
    524 
    525 /**
    526  * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
    527  * that this option does not affect incoming packet sizes, which can be
    528  * controlled via IP_REASSEMBLY.
    529  */
    530 #ifndef IP_FRAG
    531 #define IP_FRAG                         1
    532 #endif
    533 
    534 /**
    535  * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
    536  * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
    537  * in this time, the whole packet is discarded.
    538  */
    539 #ifndef IP_REASS_MAXAGE
    540 #define IP_REASS_MAXAGE                 3
    541 #endif
    542 
    543 /**
    544  * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
    545  * Since the received pbufs are enqueued, be sure to configure
    546  * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
    547  * packets even if the maximum amount of fragments is enqueued for reassembly!
    548  */
    549 #ifndef IP_REASS_MAX_PBUFS
    550 #define IP_REASS_MAX_PBUFS              10
    551 #endif
    552 
    553 /**
    554  * IP_FRAG_USES_STATIC_BUF==1: Use a static MTU-sized buffer for IP
    555  * fragmentation. Otherwise pbufs are allocated and reference the original
    556  * packet data to be fragmented (or with LWIP_NETIF_TX_SINGLE_PBUF==1,
    557  * new PBUF_RAM pbufs are used for fragments).
    558  * ATTENTION: IP_FRAG_USES_STATIC_BUF==1 may not be used for DMA-enabled MACs!
    559  */
    560 #ifndef IP_FRAG_USES_STATIC_BUF
    561 #define IP_FRAG_USES_STATIC_BUF         0
    562 #endif
    563 
    564 /**
    565  * IP_FRAG_MAX_MTU: Assumed max MTU on any interface for IP frag buffer
    566  * (requires IP_FRAG_USES_STATIC_BUF==1)
    567  */
    568 #if IP_FRAG_USES_STATIC_BUF && !defined(IP_FRAG_MAX_MTU)
    569 #define IP_FRAG_MAX_MTU                 1500
    570 #endif
    571 
    572 /**
    573  * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers.
    574  */
    575 #ifndef IP_DEFAULT_TTL
    576 #define IP_DEFAULT_TTL                  255
    577 #endif
    578 
    579 /**
    580  * IP_SOF_BROADCAST=1: Use the SOF_BROADCAST field to enable broadcast
    581  * filter per pcb on udp and raw send operations. To enable broadcast filter
    582  * on recv operations, you also have to set IP_SOF_BROADCAST_RECV=1.
    583  */
    584 #ifndef IP_SOF_BROADCAST
    585 #define IP_SOF_BROADCAST                0
    586 #endif
    587 
    588 /**
    589  * IP_SOF_BROADCAST_RECV (requires IP_SOF_BROADCAST=1) enable the broadcast
    590  * filter on recv operations.
    591  */
    592 #ifndef IP_SOF_BROADCAST_RECV
    593 #define IP_SOF_BROADCAST_RECV           0
    594 #endif
    595 
    596 /*
    597    ----------------------------------
    598    ---------- ICMP options ----------
    599    ----------------------------------
    600 */
    601 /**
    602  * LWIP_ICMP==1: Enable ICMP module inside the IP stack.
    603  * Be careful, disable that make your product non-compliant to RFC1122
    604  */
    605 #ifndef LWIP_ICMP
    606 #define LWIP_ICMP                       1
    607 #endif
    608 
    609 /**
    610  * ICMP_TTL: Default value for Time-To-Live used by ICMP packets.
    611  */
    612 #ifndef ICMP_TTL
    613 #define ICMP_TTL                       (IP_DEFAULT_TTL)
    614 #endif
    615 
    616 /**
    617  * LWIP_BROADCAST_PING==1: respond to broadcast pings (default is unicast only)
    618  */
    619 #ifndef LWIP_BROADCAST_PING
    620 #define LWIP_BROADCAST_PING             0
    621 #endif
    622 
    623 /**
    624  * LWIP_MULTICAST_PING==1: respond to multicast pings (default is unicast only)
    625  */
    626 #ifndef LWIP_MULTICAST_PING
    627 #define LWIP_MULTICAST_PING             0
    628 #endif
    629 
    630 /*
    631    ---------------------------------
    632    ---------- RAW options ----------
    633    ---------------------------------
    634 */
    635 /**
    636  * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
    637  */
    638 #ifndef LWIP_RAW
    639 #define LWIP_RAW                        1
    640 #endif
    641 
    642 /**
    643  * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
    644  */
    645 #ifndef RAW_TTL
    646 #define RAW_TTL                        (IP_DEFAULT_TTL)
    647 #endif
    648 
    649 /*
    650    ----------------------------------
    651    ---------- DHCP options ----------
    652    ----------------------------------
    653 */
    654 /**
    655  * LWIP_DHCP==1: Enable DHCP module.
    656  */
    657 #ifndef LWIP_DHCP
    658 #define LWIP_DHCP                       0
    659 #endif
    660 
    661 /**
    662  * DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address.
    663  */
    664 #ifndef DHCP_DOES_ARP_CHECK
    665 #define DHCP_DOES_ARP_CHECK             ((LWIP_DHCP) && (LWIP_ARP))
    666 #endif
    667 
    668 /*
    669    ------------------------------------
    670    ---------- AUTOIP options ----------
    671    ------------------------------------
    672 */
    673 /**
    674  * LWIP_AUTOIP==1: Enable AUTOIP module.
    675  */
    676 #ifndef LWIP_AUTOIP
    677 #define LWIP_AUTOIP                     0
    678 #endif
    679 
    680 /**
    681  * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on
    682  * the same interface at the same time.
    683  */
    684 #ifndef LWIP_DHCP_AUTOIP_COOP
    685 #define LWIP_DHCP_AUTOIP_COOP           0
    686 #endif
    687 
    688 /**
    689  * LWIP_DHCP_AUTOIP_COOP_TRIES: Set to the number of DHCP DISCOVER probes
    690  * that should be sent before falling back on AUTOIP. This can be set
    691  * as low as 1 to get an AutoIP address very quickly, but you should
    692  * be prepared to handle a changing IP address when DHCP overrides
    693  * AutoIP.
    694  */
    695 #ifndef LWIP_DHCP_AUTOIP_COOP_TRIES
    696 #define LWIP_DHCP_AUTOIP_COOP_TRIES     9
    697 #endif
    698 
    699 /*
    700    ----------------------------------
    701    ---------- SNMP options ----------
    702    ----------------------------------
    703 */
    704 /**
    705  * LWIP_SNMP==1: Turn on SNMP module. UDP must be available for SNMP
    706  * transport.
    707  */
    708 #ifndef LWIP_SNMP
    709 #define LWIP_SNMP                       0
    710 #endif
    711 
    712 /**
    713  * SNMP_CONCURRENT_REQUESTS: Number of concurrent requests the module will
    714  * allow. At least one request buffer is required.
    715  * Does not have to be changed unless external MIBs answer request asynchronously
    716  */
    717 #ifndef SNMP_CONCURRENT_REQUESTS
    718 #define SNMP_CONCURRENT_REQUESTS        1
    719 #endif
    720 
    721 /**
    722  * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
    723  * destination is required
    724  */
    725 #ifndef SNMP_TRAP_DESTINATIONS
    726 #define SNMP_TRAP_DESTINATIONS          1
    727 #endif
    728 
    729 /**
    730  * SNMP_PRIVATE_MIB:
    731  * When using a private MIB, you have to create a file 'private_mib.h' that contains
    732  * a 'struct mib_array_node mib_private' which contains your MIB.
    733  */
    734 #ifndef SNMP_PRIVATE_MIB
    735 #define SNMP_PRIVATE_MIB                0
    736 #endif
    737 
    738 /**
    739  * Only allow SNMP write actions that are 'safe' (e.g. disabeling netifs is not
    740  * a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
    741  * Unsafe requests are disabled by default!
    742  */
    743 #ifndef SNMP_SAFE_REQUESTS
    744 #define SNMP_SAFE_REQUESTS              1
    745 #endif
    746 
    747 /**
    748  * The maximum length of strings used. This affects the size of
    749  * MEMP_SNMP_VALUE elements.
    750  */
    751 #ifndef SNMP_MAX_OCTET_STRING_LEN
    752 #define SNMP_MAX_OCTET_STRING_LEN       127
    753 #endif
    754 
    755 /**
    756  * The maximum depth of the SNMP tree.
    757  * With private MIBs enabled, this depends on your MIB!
    758  * This affects the size of MEMP_SNMP_VALUE elements.
    759  */
    760 #ifndef SNMP_MAX_TREE_DEPTH
    761 #define SNMP_MAX_TREE_DEPTH             15
    762 #endif
    763 
    764 /**
    765  * The size of the MEMP_SNMP_VALUE elements, normally calculated from
    766  * SNMP_MAX_OCTET_STRING_LEN and SNMP_MAX_TREE_DEPTH.
    767  */
    768 #ifndef SNMP_MAX_VALUE_SIZE
    769 #define SNMP_MAX_VALUE_SIZE             LWIP_MAX((SNMP_MAX_OCTET_STRING_LEN)+1, sizeof(s32_t)*(SNMP_MAX_TREE_DEPTH))
    770 #endif
    771 
    772 /*
    773    ----------------------------------
    774    ---------- IGMP options ----------
    775    ----------------------------------
    776 */
    777 /**
    778  * LWIP_IGMP==1: Turn on IGMP module.
    779  */
    780 #ifndef LWIP_IGMP
    781 #define LWIP_IGMP                       0
    782 #endif
    783 
    784 /*
    785    ----------------------------------
    786    ---------- DNS options -----------
    787    ----------------------------------
    788 */
    789 /**
    790  * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS
    791  * transport.
    792  */
    793 #ifndef LWIP_DNS
    794 #define LWIP_DNS                        0
    795 #endif
    796 
    797 /** DNS maximum number of entries to maintain locally. */
    798 #ifndef DNS_TABLE_SIZE
    799 #define DNS_TABLE_SIZE                  4
    800 #endif
    801 
    802 /** DNS maximum host name length supported in the name table. */
    803 #ifndef DNS_MAX_NAME_LENGTH
    804 #define DNS_MAX_NAME_LENGTH             256
    805 #endif
    806 
    807 /** The maximum of DNS servers */
    808 #ifndef DNS_MAX_SERVERS
    809 #define DNS_MAX_SERVERS                 2
    810 #endif
    811 
    812 /** DNS do a name checking between the query and the response. */
    813 #ifndef DNS_DOES_NAME_CHECK
    814 #define DNS_DOES_NAME_CHECK             1
    815 #endif
    816 
    817 /** DNS message max. size. Default value is RFC compliant. */
    818 #ifndef DNS_MSG_SIZE
    819 #define DNS_MSG_SIZE                    512
    820 #endif
    821 
    822 /** DNS_LOCAL_HOSTLIST: Implements a local host-to-address list. If enabled,
    823  *  you have to define
    824  *    #define DNS_LOCAL_HOSTLIST_INIT {{"host1", 0x123}, {"host2", 0x234}}
    825  *  (an array of structs name/address, where address is an u32_t in network
    826  *  byte order).
    827  *
    828  *  Instead, you can also use an external function:
    829  *  #define DNS_LOOKUP_LOCAL_EXTERN(x) extern u32_t my_lookup_function(const char *name)
    830  *  that returns the IP address or INADDR_NONE if not found.
    831  */
    832 #ifndef DNS_LOCAL_HOSTLIST
    833 #define DNS_LOCAL_HOSTLIST              0
    834 #endif /* DNS_LOCAL_HOSTLIST */
    835 
    836 /** If this is turned on, the local host-list can be dynamically changed
    837  *  at runtime. */
    838 #ifndef DNS_LOCAL_HOSTLIST_IS_DYNAMIC
    839 #define DNS_LOCAL_HOSTLIST_IS_DYNAMIC   0
    840 #endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
    841 
    842 /*
    843    ---------------------------------
    844    ---------- UDP options ----------
    845    ---------------------------------
    846 */
    847 /**
    848  * LWIP_UDP==1: Turn on UDP.
    849  */
    850 #ifndef LWIP_UDP
    851 #define LWIP_UDP                        1
    852 #endif
    853 
    854 /**
    855  * LWIP_UDPLITE==1: Turn on UDP-Lite. (Requires LWIP_UDP)
    856  */
    857 #ifndef LWIP_UDPLITE
    858 #define LWIP_UDPLITE                    0
    859 #endif
    860 
    861 /**
    862  * UDP_TTL: Default Time-To-Live value.
    863  */
    864 #ifndef UDP_TTL
    865 #define UDP_TTL                         (IP_DEFAULT_TTL)
    866 #endif
    867 
    868 /**
    869  * LWIP_NETBUF_RECVINFO==1: append destination addr and port to every netbuf.
    870  */
    871 #ifndef LWIP_NETBUF_RECVINFO
    872 #define LWIP_NETBUF_RECVINFO            0
    873 #endif
    874 
    875 /*
    876    ---------------------------------
    877    ---------- TCP options ----------
    878    ---------------------------------
    879 */
    880 /**
    881  * LWIP_TCP==1: Turn on TCP.
    882  */
    883 #ifndef LWIP_TCP
    884 #define LWIP_TCP                        1
    885 #endif
    886 
    887 /**
    888  * TCP_TTL: Default Time-To-Live value.
    889  */
    890 #ifndef TCP_TTL
    891 #define TCP_TTL                         (IP_DEFAULT_TTL)
    892 #endif
    893 
    894 /**
    895  * TCP_WND: The size of a TCP window.  This must be at least
    896  * (2 * TCP_MSS) for things to work well
    897  */
    898 #ifndef TCP_WND
    899 #define TCP_WND                         (4 * TCP_MSS)
    900 #endif
    901 
    902 /**
    903  * TCP_MAXRTX: Maximum number of retransmissions of data segments.
    904  */
    905 #ifndef TCP_MAXRTX
    906 #define TCP_MAXRTX                      12
    907 #endif
    908 
    909 /**
    910  * TCP_SYNMAXRTX: Maximum number of retransmissions of SYN segments.
    911  */
    912 #ifndef TCP_SYNMAXRTX
    913 #define TCP_SYNMAXRTX                   6
    914 #endif
    915 
    916 /**
    917  * TCP_QUEUE_OOSEQ==1: TCP will queue segments that arrive out of order.
    918  * Define to 0 if your device is low on memory.
    919  */
    920 #ifndef TCP_QUEUE_OOSEQ
    921 #define TCP_QUEUE_OOSEQ                 (LWIP_TCP)
    922 #endif
    923 
    924 /**
    925  * TCP_MSS: TCP Maximum segment size. (default is 536, a conservative default,
    926  * you might want to increase this.)
    927  * For the receive side, this MSS is advertised to the remote side
    928  * when opening a connection. For the transmit size, this MSS sets
    929  * an upper limit on the MSS advertised by the remote host.
    930  */
    931 #ifndef TCP_MSS
    932 #define TCP_MSS                         536
    933 #endif
    934 
    935 /**
    936  * TCP_CALCULATE_EFF_SEND_MSS: "The maximum size of a segment that TCP really
    937  * sends, the 'effective send MSS,' MUST be the smaller of the send MSS (which
    938  * reflects the available reassembly buffer size at the remote host) and the
    939  * largest size permitted by the IP layer" (RFC 1122)
    940  * Setting this to 1 enables code that checks TCP_MSS against the MTU of the
    941  * netif used for a connection and limits the MSS if it would be too big otherwise.
    942  */
    943 #ifndef TCP_CALCULATE_EFF_SEND_MSS
    944 #define TCP_CALCULATE_EFF_SEND_MSS      1
    945 #endif
    946 
    947 
    948 /**
    949  * TCP_SND_BUF: TCP sender buffer space (bytes).
    950  */
    951 #ifndef TCP_SND_BUF
    952 #define TCP_SND_BUF                     256
    953 #endif
    954 
    955 /**
    956  * TCP_SND_QUEUELEN: TCP sender buffer space (pbufs). This must be at least
    957  * as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work.
    958  */
    959 #ifndef TCP_SND_QUEUELEN
    960 #define TCP_SND_QUEUELEN                ((4 * (TCP_SND_BUF) + (TCP_MSS - 1))/(TCP_MSS))
    961 #endif
    962 
    963 /**
    964  * TCP_SNDLOWAT: TCP writable space (bytes). This must be less than
    965  * TCP_SND_BUF. It is the amount of space which must be available in the
    966  * TCP snd_buf for select to return writable (combined with TCP_SNDQUEUELOWAT).
    967  */
    968 #ifndef TCP_SNDLOWAT
    969 #define TCP_SNDLOWAT                    ((TCP_SND_BUF)/2)
    970 #endif
    971 
    972 /**
    973  * TCP_SNDQUEUELOWAT: TCP writable bufs (pbuf count). This must be grater
    974  * than TCP_SND_QUEUELEN. If the number of pbufs queued on a pcb drops below
    975  * this number, select returns writable (combined with TCP_SNDLOWAT).
    976  */
    977 #ifndef TCP_SNDQUEUELOWAT
    978 #define TCP_SNDQUEUELOWAT               ((TCP_SND_QUEUELEN)/2)
    979 #endif
    980 
    981 /**
    982  * TCP_LISTEN_BACKLOG: Enable the backlog option for tcp listen pcb.
    983  */
    984 #ifndef TCP_LISTEN_BACKLOG
    985 #define TCP_LISTEN_BACKLOG              0
    986 #endif
    987 
    988 /**
    989  * The maximum allowed backlog for TCP listen netconns.
    990  * This backlog is used unless another is explicitly specified.
    991  * 0xff is the maximum (u8_t).
    992  */
    993 #ifndef TCP_DEFAULT_LISTEN_BACKLOG
    994 #define TCP_DEFAULT_LISTEN_BACKLOG      0xff
    995 #endif
    996 
    997 /**
    998  * TCP_OVERSIZE: The maximum number of bytes that tcp_write may
    999  * allocate ahead of time in an attempt to create shorter pbuf chains
   1000  * for transmission. The meaningful range is 0 to TCP_MSS. Some
   1001  * suggested values are:
   1002  *
   1003  * 0:         Disable oversized allocation. Each tcp_write() allocates a new
   1004               pbuf (old behaviour).
   1005  * 1:         Allocate size-aligned pbufs with minimal excess. Use this if your
   1006  *            scatter-gather DMA requires aligned fragments.
   1007  * 128:       Limit the pbuf/memory overhead to 20%.
   1008  * TCP_MSS:   Try to create unfragmented TCP packets.
   1009  * TCP_MSS/4: Try to create 4 fragments or less per TCP packet.
   1010  */
   1011 #ifndef TCP_OVERSIZE
   1012 #define TCP_OVERSIZE                    TCP_MSS
   1013 #endif
   1014 
   1015 /**
   1016  * LWIP_TCP_TIMESTAMPS==1: support the TCP timestamp option.
   1017  */
   1018 #ifndef LWIP_TCP_TIMESTAMPS
   1019 #define LWIP_TCP_TIMESTAMPS             0
   1020 #endif
   1021 
   1022 /**
   1023  * TCP_WND_UPDATE_THRESHOLD: difference in window to trigger an
   1024  * explicit window update
   1025  */
   1026 #ifndef TCP_WND_UPDATE_THRESHOLD
   1027 #define TCP_WND_UPDATE_THRESHOLD   (TCP_WND / 4)
   1028 #endif
   1029 
   1030 /**
   1031  * LWIP_EVENT_API and LWIP_CALLBACK_API: Only one of these should be set to 1.
   1032  *     LWIP_EVENT_API==1: The user defines lwip_tcp_event() to receive all
   1033  *         events (accept, sent, etc) that happen in the system.
   1034  *     LWIP_CALLBACK_API==1: The PCB callback function is called directly
   1035  *         for the event.
   1036  */
   1037 #ifndef LWIP_EVENT_API
   1038 #define LWIP_EVENT_API                  0
   1039 #define LWIP_CALLBACK_API               1
   1040 #else
   1041 #define LWIP_EVENT_API                  1
   1042 #define LWIP_CALLBACK_API               0
   1043 #endif
   1044 
   1045 
   1046 /*
   1047    ----------------------------------
   1048    ---------- Pbuf options ----------
   1049    ----------------------------------
   1050 */
   1051 /**
   1052  * PBUF_LINK_HLEN: the number of bytes that should be allocated for a
   1053  * link level header. The default is 14, the standard value for
   1054  * Ethernet.
   1055  */
   1056 #ifndef PBUF_LINK_HLEN
   1057 #define PBUF_LINK_HLEN                  (14 + ETH_PAD_SIZE)
   1058 #endif
   1059 
   1060 /**
   1061  * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
   1062  * designed to accomodate single full size TCP frame in one pbuf, including
   1063  * TCP_MSS, IP header, and link header.
   1064  */
   1065 #ifndef PBUF_POOL_BUFSIZE
   1066 #define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_HLEN)
   1067 #endif
   1068 
   1069 /*
   1070    ------------------------------------------------
   1071    ---------- Network Interfaces options ----------
   1072    ------------------------------------------------
   1073 */
   1074 /**
   1075  * LWIP_NETIF_HOSTNAME==1: use DHCP_OPTION_HOSTNAME with netif's hostname
   1076  * field.
   1077  */
   1078 #ifndef LWIP_NETIF_HOSTNAME
   1079 #define LWIP_NETIF_HOSTNAME             0
   1080 #endif
   1081 
   1082 /**
   1083  * LWIP_NETIF_API==1: Support netif api (in netifapi.c)
   1084  */
   1085 #ifndef LWIP_NETIF_API
   1086 #define LWIP_NETIF_API                  0
   1087 #endif
   1088 
   1089 /**
   1090  * LWIP_NETIF_STATUS_CALLBACK==1: Support a callback function whenever an interface
   1091  * changes its up/down status (i.e., due to DHCP IP acquistion)
   1092  */
   1093 #ifndef LWIP_NETIF_STATUS_CALLBACK
   1094 #define LWIP_NETIF_STATUS_CALLBACK      0
   1095 #endif
   1096 
   1097 /**
   1098  * LWIP_NETIF_LINK_CALLBACK==1: Support a callback function from an interface
   1099  * whenever the link changes (i.e., link down)
   1100  */
   1101 #ifndef LWIP_NETIF_LINK_CALLBACK
   1102 #define LWIP_NETIF_LINK_CALLBACK        0
   1103 #endif
   1104 
   1105 /**
   1106  * LWIP_NETIF_HWADDRHINT==1: Cache link-layer-address hints (e.g. table
   1107  * indices) in struct netif. TCP and UDP can make use of this to prevent
   1108  * scanning the ARP table for every sent packet. While this is faster for big
   1109  * ARP tables or many concurrent connections, it might be counterproductive
   1110  * if you have a tiny ARP table or if there never are concurrent connections.
   1111  */
   1112 #ifndef LWIP_NETIF_HWADDRHINT
   1113 #define LWIP_NETIF_HWADDRHINT           0
   1114 #endif
   1115 
   1116 /**
   1117  * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
   1118  * address equal to the netif IP address, looping them back up the stack.
   1119  */
   1120 #ifndef LWIP_NETIF_LOOPBACK
   1121 #define LWIP_NETIF_LOOPBACK             0
   1122 #endif
   1123 
   1124 /**
   1125  * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback
   1126  * sending for each netif (0 = disabled)
   1127  */
   1128 #ifndef LWIP_LOOPBACK_MAX_PBUFS
   1129 #define LWIP_LOOPBACK_MAX_PBUFS         0
   1130 #endif
   1131 
   1132 /**
   1133  * LWIP_NETIF_LOOPBACK_MULTITHREADING: Indicates whether threading is enabled in
   1134  * the system, as netifs must change how they behave depending on this setting
   1135  * for the LWIP_NETIF_LOOPBACK option to work.
   1136  * Setting this is needed to avoid reentering non-reentrant functions like
   1137  * tcp_input().
   1138  *    LWIP_NETIF_LOOPBACK_MULTITHREADING==1: Indicates that the user is using a
   1139  *       multithreaded environment like tcpip.c. In this case, netif->input()
   1140  *       is called directly.
   1141  *    LWIP_NETIF_LOOPBACK_MULTITHREADING==0: Indicates a polling (or NO_SYS) setup.
   1142  *       The packets are put on a list and netif_poll() must be called in
   1143  *       the main application loop.
   1144  */
   1145 #ifndef LWIP_NETIF_LOOPBACK_MULTITHREADING
   1146 #define LWIP_NETIF_LOOPBACK_MULTITHREADING    (!NO_SYS)
   1147 #endif
   1148 
   1149 /**
   1150  * LWIP_NETIF_TX_SINGLE_PBUF: if this is set to 1, lwIP tries to put all data
   1151  * to be sent into one single pbuf. This is for compatibility with DMA-enabled
   1152  * MACs that do not support scatter-gather.
   1153  * Beware that this might involve CPU-memcpy before transmitting that would not
   1154  * be needed without this flag! Use this only if you need to!
   1155  *
   1156  * @todo: TCP and IP-frag do not work with this, yet:
   1157  */
   1158 #ifndef LWIP_NETIF_TX_SINGLE_PBUF
   1159 #define LWIP_NETIF_TX_SINGLE_PBUF             0
   1160 #endif /* LWIP_NETIF_TX_SINGLE_PBUF */
   1161 
   1162 /*
   1163    ------------------------------------
   1164    ---------- LOOPIF options ----------
   1165    ------------------------------------
   1166 */
   1167 /**
   1168  * LWIP_HAVE_LOOPIF==1: Support loop interface (127.0.0.1) and loopif.c
   1169  */
   1170 #ifndef LWIP_HAVE_LOOPIF
   1171 #define LWIP_HAVE_LOOPIF                0
   1172 #endif
   1173 
   1174 /*
   1175    ------------------------------------
   1176    ---------- SLIPIF options ----------
   1177    ------------------------------------
   1178 */
   1179 /**
   1180  * LWIP_HAVE_SLIPIF==1: Support slip interface and slipif.c
   1181  */
   1182 #ifndef LWIP_HAVE_SLIPIF
   1183 #define LWIP_HAVE_SLIPIF                0
   1184 #endif
   1185 
   1186 /*
   1187    ------------------------------------
   1188    ---------- Thread options ----------
   1189    ------------------------------------
   1190 */
   1191 /**
   1192  * TCPIP_THREAD_NAME: The name assigned to the main tcpip thread.
   1193  */
   1194 #ifndef TCPIP_THREAD_NAME
   1195 #define TCPIP_THREAD_NAME              "tcpip_thread"
   1196 #endif
   1197 
   1198 /**
   1199  * TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread.
   1200  * The stack size value itself is platform-dependent, but is passed to
   1201  * sys_thread_new() when the thread is created.
   1202  */
   1203 #ifndef TCPIP_THREAD_STACKSIZE
   1204 #define TCPIP_THREAD_STACKSIZE          0
   1205 #endif
   1206 
   1207 /**
   1208  * TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread.
   1209  * The priority value itself is platform-dependent, but is passed to
   1210  * sys_thread_new() when the thread is created.
   1211  */
   1212 #ifndef TCPIP_THREAD_PRIO
   1213 #define TCPIP_THREAD_PRIO               1
   1214 #endif
   1215 
   1216 /**
   1217  * TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages
   1218  * The queue size value itself is platform-dependent, but is passed to
   1219  * sys_mbox_new() when tcpip_init is called.
   1220  */
   1221 #ifndef TCPIP_MBOX_SIZE
   1222 #define TCPIP_MBOX_SIZE                 0
   1223 #endif
   1224 
   1225 /**
   1226  * SLIPIF_THREAD_NAME: The name assigned to the slipif_loop thread.
   1227  */
   1228 #ifndef SLIPIF_THREAD_NAME
   1229 #define SLIPIF_THREAD_NAME             "slipif_loop"
   1230 #endif
   1231 
   1232 /**
   1233  * SLIP_THREAD_STACKSIZE: The stack size used by the slipif_loop thread.
   1234  * The stack size value itself is platform-dependent, but is passed to
   1235  * sys_thread_new() when the thread is created.
   1236  */
   1237 #ifndef SLIPIF_THREAD_STACKSIZE
   1238 #define SLIPIF_THREAD_STACKSIZE         0
   1239 #endif
   1240 
   1241 /**
   1242  * SLIPIF_THREAD_PRIO: The priority assigned to the slipif_loop thread.
   1243  * The priority value itself is platform-dependent, but is passed to
   1244  * sys_thread_new() when the thread is created.
   1245  */
   1246 #ifndef SLIPIF_THREAD_PRIO
   1247 #define SLIPIF_THREAD_PRIO              1
   1248 #endif
   1249 
   1250 /**
   1251  * PPP_THREAD_NAME: The name assigned to the pppInputThread.
   1252  */
   1253 #ifndef PPP_THREAD_NAME
   1254 #define PPP_THREAD_NAME                "pppInputThread"
   1255 #endif
   1256 
   1257 /**
   1258  * PPP_THREAD_STACKSIZE: The stack size used by the pppInputThread.
   1259  * The stack size value itself is platform-dependent, but is passed to
   1260  * sys_thread_new() when the thread is created.
   1261  */
   1262 #ifndef PPP_THREAD_STACKSIZE
   1263 #define PPP_THREAD_STACKSIZE            0
   1264 #endif
   1265 
   1266 /**
   1267  * PPP_THREAD_PRIO: The priority assigned to the pppInputThread.
   1268  * The priority value itself is platform-dependent, but is passed to
   1269  * sys_thread_new() when the thread is created.
   1270  */
   1271 #ifndef PPP_THREAD_PRIO
   1272 #define PPP_THREAD_PRIO                 1
   1273 #endif
   1274 
   1275 /**
   1276  * DEFAULT_THREAD_NAME: The name assigned to any other lwIP thread.
   1277  */
   1278 #ifndef DEFAULT_THREAD_NAME
   1279 #define DEFAULT_THREAD_NAME            "lwIP"
   1280 #endif
   1281 
   1282 /**
   1283  * DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread.
   1284  * The stack size value itself is platform-dependent, but is passed to
   1285  * sys_thread_new() when the thread is created.
   1286  */
   1287 #ifndef DEFAULT_THREAD_STACKSIZE
   1288 #define DEFAULT_THREAD_STACKSIZE        0
   1289 #endif
   1290 
   1291 /**
   1292  * DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread.
   1293  * The priority value itself is platform-dependent, but is passed to
   1294  * sys_thread_new() when the thread is created.
   1295  */
   1296 #ifndef DEFAULT_THREAD_PRIO
   1297 #define DEFAULT_THREAD_PRIO             1
   1298 #endif
   1299 
   1300 /**
   1301  * DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   1302  * NETCONN_RAW. The queue size value itself is platform-dependent, but is passed
   1303  * to sys_mbox_new() when the recvmbox is created.
   1304  */
   1305 #ifndef DEFAULT_RAW_RECVMBOX_SIZE
   1306 #define DEFAULT_RAW_RECVMBOX_SIZE       0
   1307 #endif
   1308 
   1309 /**
   1310  * DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   1311  * NETCONN_UDP. The queue size value itself is platform-dependent, but is passed
   1312  * to sys_mbox_new() when the recvmbox is created.
   1313  */
   1314 #ifndef DEFAULT_UDP_RECVMBOX_SIZE
   1315 #define DEFAULT_UDP_RECVMBOX_SIZE       0
   1316 #endif
   1317 
   1318 /**
   1319  * DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   1320  * NETCONN_TCP. The queue size value itself is platform-dependent, but is passed
   1321  * to sys_mbox_new() when the recvmbox is created.
   1322  */
   1323 #ifndef DEFAULT_TCP_RECVMBOX_SIZE
   1324 #define DEFAULT_TCP_RECVMBOX_SIZE       0
   1325 #endif
   1326 
   1327 /**
   1328  * DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections.
   1329  * The queue size value itself is platform-dependent, but is passed to
   1330  * sys_mbox_new() when the acceptmbox is created.
   1331  */
   1332 #ifndef DEFAULT_ACCEPTMBOX_SIZE
   1333 #define DEFAULT_ACCEPTMBOX_SIZE         0
   1334 #endif
   1335 
   1336 /*
   1337    ----------------------------------------------
   1338    ---------- Sequential layer options ----------
   1339    ----------------------------------------------
   1340 */
   1341 /**
   1342  * LWIP_TCPIP_CORE_LOCKING: (EXPERIMENTAL!)
   1343  * Don't use it if you're not an active lwIP project member
   1344  */
   1345 #ifndef LWIP_TCPIP_CORE_LOCKING
   1346 #define LWIP_TCPIP_CORE_LOCKING         0
   1347 #endif
   1348 
   1349 /**
   1350  * LWIP_TCPIP_CORE_LOCKING_INPUT: (EXPERIMENTAL!)
   1351  * Don't use it if you're not an active lwIP project member
   1352  */
   1353 #ifndef LWIP_TCPIP_CORE_LOCKING_INPUT
   1354 #define LWIP_TCPIP_CORE_LOCKING_INPUT   0
   1355 #endif
   1356 
   1357 /**
   1358  * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
   1359  */
   1360 #ifndef LWIP_NETCONN
   1361 #define LWIP_NETCONN                    1
   1362 #endif
   1363 
   1364 /** LWIP_TCPIP_TIMEOUT==1: Enable tcpip_timeout/tcpip_untimeout tod create
   1365  * timers running in tcpip_thread from another thread.
   1366  */
   1367 #ifndef LWIP_TCPIP_TIMEOUT
   1368 #define LWIP_TCPIP_TIMEOUT              1
   1369 #endif
   1370 
   1371 /*
   1372    ------------------------------------
   1373    ---------- Socket options ----------
   1374    ------------------------------------
   1375 */
   1376 /**
   1377  * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
   1378  */
   1379 #ifndef LWIP_SOCKET
   1380 #define LWIP_SOCKET                     1
   1381 #endif
   1382 
   1383 /**
   1384  * LWIP_COMPAT_SOCKETS==1: Enable BSD-style sockets functions names.
   1385  * (only used if you use sockets.c)
   1386  */
   1387 #ifndef LWIP_COMPAT_SOCKETS
   1388 #define LWIP_COMPAT_SOCKETS             1
   1389 #endif
   1390 
   1391 /**
   1392  * LWIP_POSIX_SOCKETS_IO_NAMES==1: Enable POSIX-style sockets functions names.
   1393  * Disable this option if you use a POSIX operating system that uses the same
   1394  * names (read, write & close). (only used if you use sockets.c)
   1395  */
   1396 #ifndef LWIP_POSIX_SOCKETS_IO_NAMES
   1397 #define LWIP_POSIX_SOCKETS_IO_NAMES     1
   1398 #endif
   1399 
   1400 /**
   1401  * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT
   1402  * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set
   1403  * in seconds. (does not require sockets.c, and will affect tcp.c)
   1404  */
   1405 #ifndef LWIP_TCP_KEEPALIVE
   1406 #define LWIP_TCP_KEEPALIVE              0
   1407 #endif
   1408 
   1409 /**
   1410  * LWIP_SO_RCVTIMEO==1: Enable SO_RCVTIMEO processing.
   1411  */
   1412 #ifndef LWIP_SO_RCVTIMEO
   1413 #define LWIP_SO_RCVTIMEO                0
   1414 #endif
   1415 
   1416 /**
   1417  * LWIP_SO_RCVBUF==1: Enable SO_RCVBUF processing.
   1418  */
   1419 #ifndef LWIP_SO_RCVBUF
   1420 #define LWIP_SO_RCVBUF                  0
   1421 #endif
   1422 
   1423 /**
   1424  * If LWIP_SO_RCVBUF is used, this is the default value for recv_bufsize.
   1425  */
   1426 #ifndef RECV_BUFSIZE_DEFAULT
   1427 #define RECV_BUFSIZE_DEFAULT            INT_MAX
   1428 #endif
   1429 
   1430 /**
   1431  * SO_REUSE==1: Enable SO_REUSEADDR option.
   1432  */
   1433 #ifndef SO_REUSE
   1434 #define SO_REUSE                        0
   1435 #endif
   1436 
   1437 /**
   1438  * SO_REUSE_RXTOALL==1: Pass a copy of incoming broadcast/multicast packets
   1439  * to all local matches if SO_REUSEADDR is turned on.
   1440  * WARNING: Adds a memcpy for every packet if passing to more than one pcb!
   1441  */
   1442 #ifndef SO_REUSE_RXTOALL
   1443 #define SO_REUSE_RXTOALL                0
   1444 #endif
   1445 
   1446 /*
   1447    ----------------------------------------
   1448    ---------- Statistics options ----------
   1449    ----------------------------------------
   1450 */
   1451 /**
   1452  * LWIP_STATS==1: Enable statistics collection in lwip_stats.
   1453  */
   1454 #ifndef LWIP_STATS
   1455 #define LWIP_STATS                      1
   1456 #endif
   1457 
   1458 #if LWIP_STATS
   1459 
   1460 /**
   1461  * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions.
   1462  */
   1463 #ifndef LWIP_STATS_DISPLAY
   1464 #define LWIP_STATS_DISPLAY              0
   1465 #endif
   1466 
   1467 /**
   1468  * LINK_STATS==1: Enable link stats.
   1469  */
   1470 #ifndef LINK_STATS
   1471 #define LINK_STATS                      1
   1472 #endif
   1473 
   1474 /**
   1475  * ETHARP_STATS==1: Enable etharp stats.
   1476  */
   1477 #ifndef ETHARP_STATS
   1478 #define ETHARP_STATS                    (LWIP_ARP)
   1479 #endif
   1480 
   1481 /**
   1482  * IP_STATS==1: Enable IP stats.
   1483  */
   1484 #ifndef IP_STATS
   1485 #define IP_STATS                        1
   1486 #endif
   1487 
   1488 /**
   1489  * IPFRAG_STATS==1: Enable IP fragmentation stats. Default is
   1490  * on if using either frag or reass.
   1491  */
   1492 #ifndef IPFRAG_STATS
   1493 #define IPFRAG_STATS                    (IP_REASSEMBLY || IP_FRAG)
   1494 #endif
   1495 
   1496 /**
   1497  * ICMP_STATS==1: Enable ICMP stats.
   1498  */
   1499 #ifndef ICMP_STATS
   1500 #define ICMP_STATS                      1
   1501 #endif
   1502 
   1503 /**
   1504  * IGMP_STATS==1: Enable IGMP stats.
   1505  */
   1506 #ifndef IGMP_STATS
   1507 #define IGMP_STATS                      (LWIP_IGMP)
   1508 #endif
   1509 
   1510 /**
   1511  * UDP_STATS==1: Enable UDP stats. Default is on if
   1512  * UDP enabled, otherwise off.
   1513  */
   1514 #ifndef UDP_STATS
   1515 #define UDP_STATS                       (LWIP_UDP)
   1516 #endif
   1517 
   1518 /**
   1519  * TCP_STATS==1: Enable TCP stats. Default is on if TCP
   1520  * enabled, otherwise off.
   1521  */
   1522 #ifndef TCP_STATS
   1523 #define TCP_STATS                       (LWIP_TCP)
   1524 #endif
   1525 
   1526 /**
   1527  * MEM_STATS==1: Enable mem.c stats.
   1528  */
   1529 #ifndef MEM_STATS
   1530 #define MEM_STATS                       ((MEM_LIBC_MALLOC == 0) && (MEM_USE_POOLS == 0))
   1531 #endif
   1532 
   1533 /**
   1534  * MEMP_STATS==1: Enable memp.c pool stats.
   1535  */
   1536 #ifndef MEMP_STATS
   1537 #define MEMP_STATS                      (MEMP_MEM_MALLOC == 0)
   1538 #endif
   1539 
   1540 /**
   1541  * SYS_STATS==1: Enable system stats (sem and mbox counts, etc).
   1542  */
   1543 #ifndef SYS_STATS
   1544 #define SYS_STATS                       (NO_SYS == 0)
   1545 #endif
   1546 
   1547 #else
   1548 
   1549 #define LINK_STATS                      0
   1550 #define IP_STATS                        0
   1551 #define IPFRAG_STATS                    0
   1552 #define ICMP_STATS                      0
   1553 #define IGMP_STATS                      0
   1554 #define UDP_STATS                       0
   1555 #define TCP_STATS                       0
   1556 #define MEM_STATS                       0
   1557 #define MEMP_STATS                      0
   1558 #define SYS_STATS                       0
   1559 #define LWIP_STATS_DISPLAY              0
   1560 
   1561 #endif /* LWIP_STATS */
   1562 
   1563 /*
   1564    ---------------------------------
   1565    ---------- PPP options ----------
   1566    ---------------------------------
   1567 */
   1568 /**
   1569  * PPP_SUPPORT==1: Enable PPP.
   1570  */
   1571 #ifndef PPP_SUPPORT
   1572 #define PPP_SUPPORT                     0
   1573 #endif
   1574 
   1575 /**
   1576  * PPPOE_SUPPORT==1: Enable PPP Over Ethernet
   1577  */
   1578 #ifndef PPPOE_SUPPORT
   1579 #define PPPOE_SUPPORT                   0
   1580 #endif
   1581 
   1582 /**
   1583  * PPPOS_SUPPORT==1: Enable PPP Over Serial
   1584  */
   1585 #ifndef PPPOS_SUPPORT
   1586 #define PPPOS_SUPPORT                   PPP_SUPPORT
   1587 #endif
   1588 
   1589 #if PPP_SUPPORT
   1590 
   1591 /**
   1592  * NUM_PPP: Max PPP sessions.
   1593  */
   1594 #ifndef NUM_PPP
   1595 #define NUM_PPP                         1
   1596 #endif
   1597 
   1598 /**
   1599  * PAP_SUPPORT==1: Support PAP.
   1600  */
   1601 #ifndef PAP_SUPPORT
   1602 #define PAP_SUPPORT                     0
   1603 #endif
   1604 
   1605 /**
   1606  * CHAP_SUPPORT==1: Support CHAP.
   1607  */
   1608 #ifndef CHAP_SUPPORT
   1609 #define CHAP_SUPPORT                    0
   1610 #endif
   1611 
   1612 /**
   1613  * MSCHAP_SUPPORT==1: Support MSCHAP. CURRENTLY NOT SUPPORTED! DO NOT SET!
   1614  */
   1615 #ifndef MSCHAP_SUPPORT
   1616 #define MSCHAP_SUPPORT                  0
   1617 #endif
   1618 
   1619 /**
   1620  * CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
   1621  */
   1622 #ifndef CBCP_SUPPORT
   1623 #define CBCP_SUPPORT                    0
   1624 #endif
   1625 
   1626 /**
   1627  * CCP_SUPPORT==1: Support CCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
   1628  */
   1629 #ifndef CCP_SUPPORT
   1630 #define CCP_SUPPORT                     0
   1631 #endif
   1632 
   1633 /**
   1634  * VJ_SUPPORT==1: Support VJ header compression.
   1635  */
   1636 #ifndef VJ_SUPPORT
   1637 #define VJ_SUPPORT                      0
   1638 #endif
   1639 
   1640 /**
   1641  * MD5_SUPPORT==1: Support MD5 (see also CHAP).
   1642  */
   1643 #ifndef MD5_SUPPORT
   1644 #define MD5_SUPPORT                     0
   1645 #endif
   1646 
   1647 /*
   1648  * Timeouts
   1649  */
   1650 #ifndef FSM_DEFTIMEOUT
   1651 #define FSM_DEFTIMEOUT                  6       /* Timeout time in seconds */
   1652 #endif
   1653 
   1654 #ifndef FSM_DEFMAXTERMREQS
   1655 #define FSM_DEFMAXTERMREQS              2       /* Maximum Terminate-Request transmissions */
   1656 #endif
   1657 
   1658 #ifndef FSM_DEFMAXCONFREQS
   1659 #define FSM_DEFMAXCONFREQS              10      /* Maximum Configure-Request transmissions */
   1660 #endif
   1661 
   1662 #ifndef FSM_DEFMAXNAKLOOPS
   1663 #define FSM_DEFMAXNAKLOOPS              5       /* Maximum number of nak loops */
   1664 #endif
   1665 
   1666 #ifndef UPAP_DEFTIMEOUT
   1667 #define UPAP_DEFTIMEOUT                 6       /* Timeout (seconds) for retransmitting req */
   1668 #endif
   1669 
   1670 #ifndef UPAP_DEFREQTIME
   1671 #define UPAP_DEFREQTIME                 30      /* Time to wait for auth-req from peer */
   1672 #endif
   1673 
   1674 #ifndef CHAP_DEFTIMEOUT
   1675 #define CHAP_DEFTIMEOUT                 6       /* Timeout time in seconds */
   1676 #endif
   1677 
   1678 #ifndef CHAP_DEFTRANSMITS
   1679 #define CHAP_DEFTRANSMITS               10      /* max # times to send challenge */
   1680 #endif
   1681 
   1682 /* Interval in seconds between keepalive echo requests, 0 to disable. */
   1683 #ifndef LCP_ECHOINTERVAL
   1684 #define LCP_ECHOINTERVAL                0
   1685 #endif
   1686 
   1687 /* Number of unanswered echo requests before failure. */
   1688 #ifndef LCP_MAXECHOFAILS
   1689 #define LCP_MAXECHOFAILS                3
   1690 #endif
   1691 
   1692 /* Max Xmit idle time (in jiffies) before resend flag char. */
   1693 #ifndef PPP_MAXIDLEFLAG
   1694 #define PPP_MAXIDLEFLAG                 100
   1695 #endif
   1696 
   1697 /*
   1698  * Packet sizes
   1699  *
   1700  * Note - lcp shouldn't be allowed to negotiate stuff outside these
   1701  *    limits.  See lcp.h in the pppd directory.
   1702  * (XXX - these constants should simply be shared by lcp.c instead
   1703  *    of living in lcp.h)
   1704  */
   1705 #define PPP_MTU                         1500     /* Default MTU (size of Info field) */
   1706 #ifndef PPP_MAXMTU
   1707 /* #define PPP_MAXMTU  65535 - (PPP_HDRLEN + PPP_FCSLEN) */
   1708 #define PPP_MAXMTU                      1500 /* Largest MTU we allow */
   1709 #endif
   1710 #define PPP_MINMTU                      64
   1711 #define PPP_MRU                         1500     /* default MRU = max length of info field */
   1712 #define PPP_MAXMRU                      1500     /* Largest MRU we allow */
   1713 #ifndef PPP_DEFMRU
   1714 #define PPP_DEFMRU                      296             /* Try for this */
   1715 #endif
   1716 #define PPP_MINMRU                      128             /* No MRUs below this */
   1717 
   1718 #ifndef MAXNAMELEN
   1719 #define MAXNAMELEN                      256     /* max length of hostname or name for auth */
   1720 #endif
   1721 #ifndef MAXSECRETLEN
   1722 #define MAXSECRETLEN                    256     /* max length of password or secret */
   1723 #endif
   1724 
   1725 #endif /* PPP_SUPPORT */
   1726 
   1727 /*
   1728    --------------------------------------
   1729    ---------- Checksum options ----------
   1730    --------------------------------------
   1731 */
   1732 /**
   1733  * CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets.
   1734  */
   1735 #ifndef CHECKSUM_GEN_IP
   1736 #define CHECKSUM_GEN_IP                 1
   1737 #endif
   1738 
   1739 /**
   1740  * CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets.
   1741  */
   1742 #ifndef CHECKSUM_GEN_UDP
   1743 #define CHECKSUM_GEN_UDP                1
   1744 #endif
   1745 
   1746 /**
   1747  * CHECKSUM_GEN_TCP==1: Generate checksums in software for outgoing TCP packets.
   1748  */
   1749 #ifndef CHECKSUM_GEN_TCP
   1750 #define CHECKSUM_GEN_TCP                1
   1751 #endif
   1752 
   1753 /**
   1754  * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.
   1755  */
   1756 #ifndef CHECKSUM_CHECK_IP
   1757 #define CHECKSUM_CHECK_IP               1
   1758 #endif
   1759 
   1760 /**
   1761  * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.
   1762  */
   1763 #ifndef CHECKSUM_CHECK_UDP
   1764 #define CHECKSUM_CHECK_UDP              1
   1765 #endif
   1766 
   1767 /**
   1768  * CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets.
   1769  */
   1770 #ifndef CHECKSUM_CHECK_TCP
   1771 #define CHECKSUM_CHECK_TCP              1
   1772 #endif
   1773 
   1774 /**
   1775  * LWIP_CHECKSUM_ON_COPY==1: Calculate checksum when copying data from
   1776  * application buffers to pbufs.
   1777  */
   1778 #ifndef LWIP_CHECKSUM_ON_COPY
   1779 #define LWIP_CHECKSUM_ON_COPY           0
   1780 #endif
   1781 
   1782 /*
   1783    ---------------------------------------
   1784    ---------- Debugging options ----------
   1785    ---------------------------------------
   1786 */
   1787 /**
   1788  * LWIP_DBG_MIN_LEVEL: After masking, the value of the debug is
   1789  * compared against this value. If it is smaller, then debugging
   1790  * messages are written.
   1791  */
   1792 #ifndef LWIP_DBG_MIN_LEVEL
   1793 #define LWIP_DBG_MIN_LEVEL              LWIP_DBG_LEVEL_ALL
   1794 #endif
   1795 
   1796 /**
   1797  * LWIP_DBG_TYPES_ON: A mask that can be used to globally enable/disable
   1798  * debug messages of certain types.
   1799  */
   1800 #ifndef LWIP_DBG_TYPES_ON
   1801 #define LWIP_DBG_TYPES_ON               LWIP_DBG_ON
   1802 #endif
   1803 
   1804 /**
   1805  * ETHARP_DEBUG: Enable debugging in etharp.c.
   1806  */
   1807 #ifndef ETHARP_DEBUG
   1808 #define ETHARP_DEBUG                    LWIP_DBG_OFF
   1809 #endif
   1810 
   1811 /**
   1812  * NETIF_DEBUG: Enable debugging in netif.c.
   1813  */
   1814 #ifndef NETIF_DEBUG
   1815 #define NETIF_DEBUG                     LWIP_DBG_OFF
   1816 #endif
   1817 
   1818 /**
   1819  * UNDIIF_DEBUG: Enable debugging in undiif.c.
   1820  */
   1821 #ifndef UNDIIF_DEBUG
   1822 #define UNDIIF_DEBUG                     LWIP_DBG_OFF
   1823 #endif
   1824 
   1825 /**
   1826  * UNDIIF_ARP_DEBUG: Enable ETHARP debugging in undiif.c.
   1827  */
   1828 #ifndef UNDIIF_ARP_DEBUG
   1829 #define UNDIIF_ARP_DEBUG                     LWIP_DBG_OFF
   1830 #endif
   1831 
   1832 /**
   1833  * UNDIIF_NET_DEBUG: Enable NETIF debugging in undiif.c.
   1834  */
   1835 #ifndef UNDIIF_NET_DEBUG
   1836 #define UNDIIF_NET_DEBUG                     LWIP_DBG_OFF
   1837 #endif
   1838 
   1839 /**
   1840  * UNDIIF_ID_DEBUG: Enable debugging to identify packets in undiif.c.
   1841  */
   1842 #ifndef UNDIIF_ID_DEBUG
   1843 #define UNDIIF_ID_DEBUG                     LWIP_DBG_OFF
   1844 #endif
   1845 
   1846 /**
   1847  * PBUF_DEBUG: Enable debugging in pbuf.c.
   1848  */
   1849 #ifndef PBUF_DEBUG
   1850 #define PBUF_DEBUG                      LWIP_DBG_OFF
   1851 #endif
   1852 
   1853 /**
   1854  * API_LIB_DEBUG: Enable debugging in api_lib.c.
   1855  */
   1856 #ifndef API_LIB_DEBUG
   1857 #define API_LIB_DEBUG                   LWIP_DBG_OFF
   1858 #endif
   1859 
   1860 /**
   1861  * API_MSG_DEBUG: Enable debugging in api_msg.c.
   1862  */
   1863 #ifndef API_MSG_DEBUG
   1864 #define API_MSG_DEBUG                   LWIP_DBG_OFF
   1865 #endif
   1866 
   1867 /**
   1868  * SOCKETS_DEBUG: Enable debugging in sockets.c.
   1869  */
   1870 #ifndef SOCKETS_DEBUG
   1871 #define SOCKETS_DEBUG                   LWIP_DBG_OFF
   1872 #endif
   1873 
   1874 /**
   1875  * ICMP_DEBUG: Enable debugging in icmp.c.
   1876  */
   1877 #ifndef ICMP_DEBUG
   1878 #define ICMP_DEBUG                      LWIP_DBG_OFF
   1879 #endif
   1880 
   1881 /**
   1882  * IGMP_DEBUG: Enable debugging in igmp.c.
   1883  */
   1884 #ifndef IGMP_DEBUG
   1885 #define IGMP_DEBUG                      LWIP_DBG_OFF
   1886 #endif
   1887 
   1888 /**
   1889  * INET_DEBUG: Enable debugging in inet.c.
   1890  */
   1891 #ifndef INET_DEBUG
   1892 #define INET_DEBUG                      LWIP_DBG_OFF
   1893 #endif
   1894 
   1895 /**
   1896  * IP_DEBUG: Enable debugging for IP.
   1897  */
   1898 #ifndef IP_DEBUG
   1899 #define IP_DEBUG                        LWIP_DBG_OFF
   1900 #endif
   1901 
   1902 /**
   1903  * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass.
   1904  */
   1905 #ifndef IP_REASS_DEBUG
   1906 #define IP_REASS_DEBUG                  LWIP_DBG_OFF
   1907 #endif
   1908 
   1909 /**
   1910  * RAW_DEBUG: Enable debugging in raw.c.
   1911  */
   1912 #ifndef RAW_DEBUG
   1913 #define RAW_DEBUG                       LWIP_DBG_OFF
   1914 #endif
   1915 
   1916 /**
   1917  * MEM_DEBUG: Enable debugging in mem.c.
   1918  */
   1919 #ifndef MEM_DEBUG
   1920 #define MEM_DEBUG                       LWIP_DBG_OFF
   1921 #endif
   1922 
   1923 /**
   1924  * MEMP_DEBUG: Enable debugging in memp.c.
   1925  */
   1926 #ifndef MEMP_DEBUG
   1927 #define MEMP_DEBUG                      LWIP_DBG_OFF
   1928 #endif
   1929 
   1930 /**
   1931  * SYS_DEBUG: Enable debugging in sys.c.
   1932  */
   1933 #ifndef SYS_DEBUG
   1934 #define SYS_DEBUG                       LWIP_DBG_OFF
   1935 #endif
   1936 
   1937 /**
   1938  * TIMERS_DEBUG: Enable debugging in timers.c.
   1939  */
   1940 #ifndef TIMERS_DEBUG
   1941 #define TIMERS_DEBUG                    LWIP_DBG_OFF
   1942 #endif
   1943 
   1944 /**
   1945  * TCP_DEBUG: Enable debugging for TCP.
   1946  */
   1947 #ifndef TCP_DEBUG
   1948 #define TCP_DEBUG                       LWIP_DBG_OFF
   1949 #endif
   1950 
   1951 /**
   1952  * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
   1953  */
   1954 #ifndef TCP_INPUT_DEBUG
   1955 #define TCP_INPUT_DEBUG                 LWIP_DBG_OFF
   1956 #endif
   1957 
   1958 /**
   1959  * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit.
   1960  */
   1961 #ifndef TCP_FR_DEBUG
   1962 #define TCP_FR_DEBUG                    LWIP_DBG_OFF
   1963 #endif
   1964 
   1965 /**
   1966  * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit
   1967  * timeout.
   1968  */
   1969 #ifndef TCP_RTO_DEBUG
   1970 #define TCP_RTO_DEBUG                   LWIP_DBG_OFF
   1971 #endif
   1972 
   1973 /**
   1974  * TCP_CWND_DEBUG: Enable debugging for TCP congestion window.
   1975  */
   1976 #ifndef TCP_CWND_DEBUG
   1977 #define TCP_CWND_DEBUG                  LWIP_DBG_OFF
   1978 #endif
   1979 
   1980 /**
   1981  * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating.
   1982  */
   1983 #ifndef TCP_WND_DEBUG
   1984 #define TCP_WND_DEBUG                   LWIP_DBG_OFF
   1985 #endif
   1986 
   1987 /**
   1988  * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
   1989  */
   1990 #ifndef TCP_OUTPUT_DEBUG
   1991 #define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
   1992 #endif
   1993 
   1994 /**
   1995  * TCP_RST_DEBUG: Enable debugging for TCP with the RST message.
   1996  */
   1997 #ifndef TCP_RST_DEBUG
   1998 #define TCP_RST_DEBUG                   LWIP_DBG_OFF
   1999 #endif
   2000 
   2001 /**
   2002  * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths.
   2003  */
   2004 #ifndef TCP_QLEN_DEBUG
   2005 #define TCP_QLEN_DEBUG                  LWIP_DBG_OFF
   2006 #endif
   2007 
   2008 /**
   2009  * UDP_DEBUG: Enable debugging in UDP.
   2010  */
   2011 #ifndef UDP_DEBUG
   2012 #define UDP_DEBUG                       LWIP_DBG_OFF
   2013 #endif
   2014 
   2015 /**
   2016  * TCPIP_DEBUG: Enable debugging in tcpip.c.
   2017  */
   2018 #ifndef TCPIP_DEBUG
   2019 #define TCPIP_DEBUG                     LWIP_DBG_OFF
   2020 #endif
   2021 
   2022 /**
   2023  * PPP_DEBUG: Enable debugging for PPP.
   2024  */
   2025 #ifndef PPP_DEBUG
   2026 #define PPP_DEBUG                       LWIP_DBG_OFF
   2027 #endif
   2028 
   2029 /**
   2030  * SLIP_DEBUG: Enable debugging in slipif.c.
   2031  */
   2032 #ifndef SLIP_DEBUG
   2033 #define SLIP_DEBUG                      LWIP_DBG_OFF
   2034 #endif
   2035 
   2036 /**
   2037  * DHCP_DEBUG: Enable debugging in dhcp.c.
   2038  */
   2039 #ifndef DHCP_DEBUG
   2040 #define DHCP_DEBUG                      LWIP_DBG_OFF
   2041 #endif
   2042 
   2043 /**
   2044  * AUTOIP_DEBUG: Enable debugging in autoip.c.
   2045  */
   2046 #ifndef AUTOIP_DEBUG
   2047 #define AUTOIP_DEBUG                    LWIP_DBG_OFF
   2048 #endif
   2049 
   2050 /**
   2051  * SNMP_MSG_DEBUG: Enable debugging for SNMP messages.
   2052  */
   2053 #ifndef SNMP_MSG_DEBUG
   2054 #define SNMP_MSG_DEBUG                  LWIP_DBG_OFF
   2055 #endif
   2056 
   2057 /**
   2058  * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
   2059  */
   2060 #ifndef SNMP_MIB_DEBUG
   2061 #define SNMP_MIB_DEBUG                  LWIP_DBG_OFF
   2062 #endif
   2063 
   2064 /**
   2065  * DNS_DEBUG: Enable debugging for DNS.
   2066  */
   2067 #ifndef DNS_DEBUG
   2068 #define DNS_DEBUG                       LWIP_DBG_OFF
   2069 #endif
   2070 
   2071 #endif /* __LWIP_OPT_H__ */
   2072