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opt.h

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00001 /**
00002  * @file
00003  *
00004  * lwIP Options Configuration
00005  */
00006 
00007 /*
00008  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
00009  * All rights reserved.
00010  *
00011  * Redistribution and use in source and binary forms, with or without modification,
00012  * are permitted provided that the following conditions are met:
00013  *
00014  * 1. Redistributions of source code must retain the above copyright notice,
00015  *    this list of conditions and the following disclaimer.
00016  * 2. Redistributions in binary form must reproduce the above copyright notice,
00017  *    this list of conditions and the following disclaimer in the documentation
00018  *    and/or other materials provided with the distribution.
00019  * 3. The name of the author may not be used to endorse or promote products
00020  *    derived from this software without specific prior written permission.
00021  *
00022  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
00023  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00024  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
00025  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00026  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
00027  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
00030  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
00031  * OF SUCH DAMAGE.
00032  *
00033  * This file is part of the lwIP TCP/IP stack.
00034  *
00035  * Author: Adam Dunkels <adam@sics.se>
00036  *
00037  */
00038 
00039 /*
00040  * NOTE: || defined __DOXYGEN__ is a workaround for doxygen bug -
00041  * without this, doxygen does not see the actual #define
00042  */
00043 
00044 #if !defined LWIP_HDR_OPT_H
00045 #define LWIP_HDR_OPT_H
00046 
00047 /*
00048  * Include user defined options first. Anything not defined in these files
00049  * will be set to standard values. Override anything you don't like!
00050  */
00051 #include "lwipopts.h"
00052 #include "lwip/debug.h"
00053 
00054 /**
00055  * @defgroup lwip_opts Options (lwipopts.h)
00056  * @ingroup lwip
00057  *
00058  * @defgroup lwip_opts_debug Debugging
00059  * @ingroup lwip_opts
00060  *
00061  * @defgroup lwip_opts_infrastructure Infrastructure
00062  * @ingroup lwip_opts
00063  *
00064  * @defgroup lwip_opts_callback Callback-style APIs
00065  * @ingroup lwip_opts
00066  *
00067  * @defgroup lwip_opts_threadsafe_apis Thread-safe APIs
00068  * @ingroup lwip_opts
00069  */
00070 
00071  /*
00072    ------------------------------------
00073    -------------- NO SYS --------------
00074    ------------------------------------
00075 */
00076 /**
00077  * @defgroup lwip_opts_nosys NO_SYS
00078  * @ingroup lwip_opts_infrastructure
00079  * @{
00080  */
00081 /**
00082  * NO_SYS==1: Use lwIP without OS-awareness (no thread, semaphores, mutexes or
00083  * mboxes). This means threaded APIs cannot be used (socket, netconn,
00084  * i.e. everything in the 'api' folder), only the callback-style raw API is
00085  * available (and you have to watch out for yourself that you don't access
00086  * lwIP functions/structures from more than one context at a time!)
00087  */
00088 #if !defined NO_SYS || defined __DOXYGEN__
00089 #define NO_SYS                          0
00090 #endif
00091 /**
00092  * @}
00093  */
00094 
00095 /**
00096  * @defgroup lwip_opts_timers Timers
00097  * @ingroup lwip_opts_infrastructure
00098  * @{
00099  */
00100 /**
00101  * LWIP_TIMERS==0: Drop support for sys_timeout and lwip-internal cyclic timers.
00102  * (the array of lwip-internal cyclic timers is still provided)
00103  * (check NO_SYS_NO_TIMERS for compatibility to old versions)
00104  */
00105 #if !defined LWIP_TIMERS || defined __DOXYGEN__
00106 #ifdef NO_SYS_NO_TIMERS
00107 #define LWIP_TIMERS                     (!NO_SYS || (NO_SYS && !NO_SYS_NO_TIMERS))
00108 #else
00109 #define LWIP_TIMERS                     1
00110 #endif
00111 #endif
00112 
00113 /**
00114  * LWIP_TIMERS_CUSTOM==1: Provide your own timer implementation.
00115  * Function prototypes in timeouts.h and the array of lwip-internal cyclic timers
00116  * are still included, but the implementation is not. The following functions
00117  * will be required: sys_timeouts_init(), sys_timeout(), sys_untimeout(),
00118  *                   sys_timeouts_mbox_fetch()
00119  */
00120 #if !defined LWIP_TIMERS_CUSTOM || defined __DOXYGEN__
00121 #define LWIP_TIMERS_CUSTOM              0
00122 #endif
00123 /**
00124  * @}
00125  */
00126 
00127 /**
00128  * @defgroup lwip_opts_memcpy memcpy
00129  * @ingroup lwip_opts_infrastructure
00130  * @{
00131  */
00132 /**
00133  * MEMCPY: override this if you have a faster implementation at hand than the
00134  * one included in your C library
00135  */
00136 #if !defined MEMCPY || defined __DOXYGEN__
00137 #define MEMCPY(dst,src,len)             memcpy(dst,src,len)
00138 #endif
00139 
00140 /**
00141  * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a
00142  * call to memcpy() if the length is known at compile time and is small.
00143  */
00144 #if !defined SMEMCPY || defined __DOXYGEN__
00145 #define SMEMCPY(dst,src,len)            memcpy(dst,src,len)
00146 #endif
00147 
00148 /**
00149  * MEMMOVE: override this if you have a faster implementation at hand than the
00150  * one included in your C library.  lwIP currently uses MEMMOVE only when IPv6
00151  * fragmentation support is enabled.
00152  */
00153 #if !defined MEMMOVE || defined __DOXYGEN__
00154 #define MEMMOVE(dst,src,len)            memmove(dst,src,len)
00155 #endif
00156 /**
00157  * @}
00158  */
00159 
00160 /*
00161    ------------------------------------
00162    ----------- Core locking -----------
00163    ------------------------------------
00164 */
00165 /**
00166  * @defgroup lwip_opts_lock Core locking and MPU
00167  * @ingroup lwip_opts_infrastructure
00168  * @{
00169  */
00170 /**
00171  * LWIP_MPU_COMPATIBLE: enables special memory management mechanism
00172  * which makes lwip able to work on MPU (Memory Protection Unit) system
00173  * by not passing stack-pointers to other threads
00174  * (this decreases performance as memory is allocated from pools instead
00175  * of keeping it on the stack)
00176  */
00177 #if !defined LWIP_MPU_COMPATIBLE || defined __DOXYGEN__
00178 #define LWIP_MPU_COMPATIBLE             0
00179 #endif
00180 
00181 /**
00182  * LWIP_TCPIP_CORE_LOCKING
00183  * Creates a global mutex that is held during TCPIP thread operations.
00184  * Can be locked by client code to perform lwIP operations without changing
00185  * into TCPIP thread using callbacks. See LOCK_TCPIP_CORE() and
00186  * UNLOCK_TCPIP_CORE().
00187  * Your system should provide mutexes supporting priority inversion to use this.
00188  */
00189 #if !defined LWIP_TCPIP_CORE_LOCKING || defined __DOXYGEN__
00190 #define LWIP_TCPIP_CORE_LOCKING         1
00191 #endif
00192 
00193 /**
00194  * LWIP_TCPIP_CORE_LOCKING_INPUT: when LWIP_TCPIP_CORE_LOCKING is enabled,
00195  * this lets tcpip_input() grab the mutex for input packets as well,
00196  * instead of allocating a message and passing it to tcpip_thread.
00197  *
00198  * ATTENTION: this does not work when tcpip_input() is called from
00199  * interrupt context!
00200  */
00201 #if !defined LWIP_TCPIP_CORE_LOCKING_INPUT || defined __DOXYGEN__
00202 #define LWIP_TCPIP_CORE_LOCKING_INPUT   0
00203 #endif
00204 
00205 /**
00206  * SYS_LIGHTWEIGHT_PROT==1: enable inter-task protection (and task-vs-interrupt
00207  * protection) for certain critical regions during buffer allocation, deallocation
00208  * and memory allocation and deallocation.
00209  * ATTENTION: This is required when using lwIP from more than one context! If
00210  * you disable this, you must be sure what you are doing!
00211  */
00212 #if !defined SYS_LIGHTWEIGHT_PROT || defined __DOXYGEN__
00213 #define SYS_LIGHTWEIGHT_PROT            1
00214 #endif
00215 
00216 /**
00217  * Macro/function to check whether lwIP's threading/locking
00218  * requirements are satisfied during current function call.
00219  * This macro usually calls a function that is implemented in the OS-dependent
00220  * sys layer and performs the following checks:
00221  * - Not in ISR (this should be checked for NO_SYS==1, too!)
00222  * - If @ref LWIP_TCPIP_CORE_LOCKING = 1: TCPIP core lock is held
00223  * - If @ref LWIP_TCPIP_CORE_LOCKING = 0: function is called from TCPIP thread
00224  * @see @ref multithreading
00225  */
00226 #if !defined LWIP_ASSERT_CORE_LOCKED || defined __DOXYGEN__
00227 #define LWIP_ASSERT_CORE_LOCKED()
00228 #endif
00229 
00230 /**
00231  * Called as first thing in the lwIP TCPIP thread. Can be used in conjunction
00232  * with @ref LWIP_ASSERT_CORE_LOCKED to check core locking.
00233  * @see @ref multithreading
00234  */
00235 #if !defined LWIP_MARK_TCPIP_THREAD || defined __DOXYGEN__
00236 #define LWIP_MARK_TCPIP_THREAD()
00237 #endif
00238 /**
00239  * @}
00240  */
00241 
00242 /*
00243    ------------------------------------
00244    ---------- Memory options ----------
00245    ------------------------------------
00246 */
00247 /**
00248  * @defgroup lwip_opts_mem Heap and memory pools
00249  * @ingroup lwip_opts_infrastructure
00250  * @{
00251  */
00252 /**
00253  * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library
00254  * instead of the lwip internal allocator. Can save code size if you
00255  * already use it.
00256  */
00257 #if !defined MEM_LIBC_MALLOC || defined __DOXYGEN__
00258 #define MEM_LIBC_MALLOC                 0
00259 #endif
00260 
00261 /**
00262  * MEMP_MEM_MALLOC==1: Use mem_malloc/mem_free instead of the lwip pool allocator.
00263  * Especially useful with MEM_LIBC_MALLOC but handle with care regarding execution
00264  * speed (heap alloc can be much slower than pool alloc) and usage from interrupts
00265  * (especially if your netif driver allocates PBUF_POOL pbufs for received frames
00266  * from interrupt)!
00267  * ATTENTION: Currently, this uses the heap for ALL pools (also for private pools,
00268  * not only for internal pools defined in memp_std.h)!
00269  */
00270 #if !defined MEMP_MEM_MALLOC || defined __DOXYGEN__
00271 #define MEMP_MEM_MALLOC                 0
00272 #endif
00273 
00274 /**
00275  * MEMP_MEM_INIT==1: Force use of memset to initialize pool memory.
00276  * Useful if pool are moved in uninitialized section of memory. This will ensure
00277  * default values in pcbs struct are well initialized in all conditions.
00278  */
00279 #if !defined MEMP_MEM_INIT || defined __DOXYGEN__
00280 #define MEMP_MEM_INIT                   0
00281 #endif
00282 
00283 /**
00284  * MEM_ALIGNMENT: should be set to the alignment of the CPU
00285  *    4 byte alignment -> \#define MEM_ALIGNMENT 4
00286  *    2 byte alignment -> \#define MEM_ALIGNMENT 2
00287  */
00288 #if !defined MEM_ALIGNMENT || defined __DOXYGEN__
00289 #define MEM_ALIGNMENT                   1
00290 #endif
00291 
00292 /**
00293  * MEM_SIZE: the size of the heap memory. If the application will send
00294  * a lot of data that needs to be copied, this should be set high.
00295  */
00296 #if !defined MEM_SIZE || defined __DOXYGEN__
00297 #define MEM_SIZE                        1600
00298 #endif
00299 
00300 /**
00301  * MEMP_OVERFLOW_CHECK: memp overflow protection reserves a configurable
00302  * amount of bytes before and after each memp element in every pool and fills
00303  * it with a prominent default value.
00304  *    MEMP_OVERFLOW_CHECK == 0 no checking
00305  *    MEMP_OVERFLOW_CHECK == 1 checks each element when it is freed
00306  *    MEMP_OVERFLOW_CHECK >= 2 checks each element in every pool every time
00307  *      memp_malloc() or memp_free() is called (useful but slow!)
00308  */
00309 #if !defined MEMP_OVERFLOW_CHECK || defined __DOXYGEN__
00310 #define MEMP_OVERFLOW_CHECK             0
00311 #endif
00312 
00313 /**
00314  * MEMP_SANITY_CHECK==1: run a sanity check after each memp_free() to make
00315  * sure that there are no cycles in the linked lists.
00316  */
00317 #if !defined MEMP_SANITY_CHECK || defined __DOXYGEN__
00318 #define MEMP_SANITY_CHECK               0
00319 #endif
00320 
00321 /**
00322  * MEM_OVERFLOW_CHECK: mem overflow protection reserves a configurable
00323  * amount of bytes before and after each heap allocation chunk and fills
00324  * it with a prominent default value.
00325  *    MEM_OVERFLOW_CHECK == 0 no checking
00326  *    MEM_OVERFLOW_CHECK == 1 checks each element when it is freed
00327  *    MEM_OVERFLOW_CHECK >= 2 checks all heap elements every time
00328  *      mem_malloc() or mem_free() is called (useful but slow!)
00329  */
00330 #if !defined MEM_OVERFLOW_CHECK || defined __DOXYGEN__
00331 #define MEM_OVERFLOW_CHECK              0
00332 #endif
00333 
00334 /**
00335  * MEM_SANITY_CHECK==1: run a sanity check after each mem_free() to make
00336  * sure that the linked list of heap elements is not corrupted.
00337  */
00338 #if !defined MEM_SANITY_CHECK || defined __DOXYGEN__
00339 #define MEM_SANITY_CHECK                0
00340 #endif
00341 
00342 /**
00343  * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set
00344  * of memory pools of various sizes. When mem_malloc is called, an element of
00345  * the smallest pool that can provide the length needed is returned.
00346  * To use this, MEMP_USE_CUSTOM_POOLS also has to be enabled.
00347  */
00348 #if !defined MEM_USE_POOLS || defined __DOXYGEN__
00349 #define MEM_USE_POOLS                   0
00350 #endif
00351 
00352 /**
00353  * MEM_USE_POOLS_TRY_BIGGER_POOL==1: if one malloc-pool is empty, try the next
00354  * bigger pool - WARNING: THIS MIGHT WASTE MEMORY but it can make a system more
00355  * reliable. */
00356 #if !defined MEM_USE_POOLS_TRY_BIGGER_POOL || defined __DOXYGEN__
00357 #define MEM_USE_POOLS_TRY_BIGGER_POOL   0
00358 #endif
00359 
00360 /**
00361  * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h
00362  * that defines additional pools beyond the "standard" ones required
00363  * by lwIP. If you set this to 1, you must have lwippools.h in your
00364  * include path somewhere.
00365  */
00366 #if !defined MEMP_USE_CUSTOM_POOLS || defined __DOXYGEN__
00367 #define MEMP_USE_CUSTOM_POOLS           0
00368 #endif
00369 
00370 /**
00371  * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from
00372  * interrupt context (or another context that doesn't allow waiting for a
00373  * semaphore).
00374  * If set to 1, mem_malloc will be protected by a semaphore and SYS_ARCH_PROTECT,
00375  * while mem_free will only use SYS_ARCH_PROTECT. mem_malloc SYS_ARCH_UNPROTECTs
00376  * with each loop so that mem_free can run.
00377  *
00378  * ATTENTION: As you can see from the above description, this leads to dis-/
00379  * enabling interrupts often, which can be slow! Also, on low memory, mem_malloc
00380  * can need longer.
00381  *
00382  * If you don't want that, at least for NO_SYS=0, you can still use the following
00383  * functions to enqueue a deallocation call which then runs in the tcpip_thread
00384  * context:
00385  * - pbuf_free_callback(p);
00386  * - mem_free_callback(m);
00387  */
00388 #if !defined LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT || defined __DOXYGEN__
00389 #define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 0
00390 #endif
00391 /**
00392  * @}
00393  */
00394 
00395 /*
00396    ------------------------------------------------
00397    ---------- Internal Memory Pool Sizes ----------
00398    ------------------------------------------------
00399 */
00400 /**
00401  * @defgroup lwip_opts_memp Internal memory pools
00402  * @ingroup lwip_opts_infrastructure
00403  * @{
00404  */
00405 /**
00406  * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
00407  * If the application sends a lot of data out of ROM (or other static memory),
00408  * this should be set high.
00409  */
00410 #if !defined MEMP_NUM_PBUF || defined __DOXYGEN__
00411 #define MEMP_NUM_PBUF                   16
00412 #endif
00413 
00414 /**
00415  * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
00416  * (requires the LWIP_RAW option)
00417  */
00418 #if !defined MEMP_NUM_RAW_PCB || defined __DOXYGEN__
00419 #define MEMP_NUM_RAW_PCB                4
00420 #endif
00421 
00422 /**
00423  * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
00424  * per active UDP "connection".
00425  * (requires the LWIP_UDP option)
00426  */
00427 #if !defined MEMP_NUM_UDP_PCB || defined __DOXYGEN__
00428 #define MEMP_NUM_UDP_PCB                4
00429 #endif
00430 
00431 /**
00432  * MEMP_NUM_TCP_PCB: the number of simultaneously active TCP connections.
00433  * (requires the LWIP_TCP option)
00434  */
00435 #if !defined MEMP_NUM_TCP_PCB || defined __DOXYGEN__
00436 #define MEMP_NUM_TCP_PCB                5
00437 #endif
00438 
00439 /**
00440  * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
00441  * (requires the LWIP_TCP option)
00442  */
00443 #if !defined MEMP_NUM_TCP_PCB_LISTEN || defined __DOXYGEN__
00444 #define MEMP_NUM_TCP_PCB_LISTEN         8
00445 #endif
00446 
00447 /**
00448  * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
00449  * (requires the LWIP_TCP option)
00450  */
00451 #if !defined MEMP_NUM_TCP_SEG || defined __DOXYGEN__
00452 #define MEMP_NUM_TCP_SEG                16
00453 #endif
00454 
00455 /**
00456  * MEMP_NUM_ALTCP_PCB: the number of simultaneously active altcp layer pcbs.
00457  * (requires the LWIP_ALTCP option)
00458  * Connections with multiple layers require more than one altcp_pcb (e.g. TLS
00459  * over TCP requires 2 altcp_pcbs, one for TLS and one for TCP).
00460  */
00461 #if !defined MEMP_NUM_ALTCP_PCB || defined __DOXYGEN__
00462 #define MEMP_NUM_ALTCP_PCB              MEMP_NUM_TCP_PCB
00463 #endif
00464 
00465 /**
00466  * MEMP_NUM_REASSDATA: the number of IP packets simultaneously queued for
00467  * reassembly (whole packets, not fragments!)
00468  */
00469 #if !defined MEMP_NUM_REASSDATA || defined __DOXYGEN__
00470 #define MEMP_NUM_REASSDATA              5
00471 #endif
00472 
00473 /**
00474  * MEMP_NUM_FRAG_PBUF: the number of IP fragments simultaneously sent
00475  * (fragments, not whole packets!).
00476  * This is only used with LWIP_NETIF_TX_SINGLE_PBUF==0 and only has to be > 1
00477  * with DMA-enabled MACs where the packet is not yet sent when netif->output
00478  * returns.
00479  */
00480 #if !defined MEMP_NUM_FRAG_PBUF || defined __DOXYGEN__
00481 #define MEMP_NUM_FRAG_PBUF              15
00482 #endif
00483 
00484 /**
00485  * MEMP_NUM_ARP_QUEUE: the number of simultaneously queued outgoing
00486  * packets (pbufs) that are waiting for an ARP request (to resolve
00487  * their destination address) to finish.
00488  * (requires the ARP_QUEUEING option)
00489  */
00490 #if !defined MEMP_NUM_ARP_QUEUE || defined __DOXYGEN__
00491 #define MEMP_NUM_ARP_QUEUE              30
00492 #endif
00493 
00494 /**
00495  * MEMP_NUM_IGMP_GROUP: The number of multicast groups whose network interfaces
00496  * can be members at the same time (one per netif - allsystems group -, plus one
00497  * per netif membership).
00498  * (requires the LWIP_IGMP option)
00499  */
00500 #if !defined MEMP_NUM_IGMP_GROUP || defined __DOXYGEN__
00501 #define MEMP_NUM_IGMP_GROUP             8
00502 #endif
00503 
00504 /**
00505  * The number of sys timeouts used by the core stack (not apps)
00506  * The default number of timeouts is calculated here for all enabled modules.
00507  */
00508 #define LWIP_NUM_SYS_TIMEOUT_INTERNAL   (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS + (LWIP_IPV6 * (1 + LWIP_IPV6_REASS + LWIP_IPV6_MLD)))
00509 
00510 /**
00511  * MEMP_NUM_SYS_TIMEOUT: the number of simultaneously active timeouts.
00512  * The default number of timeouts is calculated here for all enabled modules.
00513  * The formula expects settings to be either '0' or '1'.
00514  */
00515 #if !defined MEMP_NUM_SYS_TIMEOUT || defined __DOXYGEN__
00516 #define MEMP_NUM_SYS_TIMEOUT            LWIP_NUM_SYS_TIMEOUT_INTERNAL
00517 #endif
00518 
00519 /**
00520  * MEMP_NUM_NETBUF: the number of struct netbufs.
00521  * (only needed if you use the sequential API, like api_lib.c)
00522  */
00523 #if !defined MEMP_NUM_NETBUF || defined __DOXYGEN__
00524 #define MEMP_NUM_NETBUF                 2
00525 #endif
00526 
00527 /**
00528  * MEMP_NUM_NETCONN: the number of struct netconns.
00529  * (only needed if you use the sequential API, like api_lib.c)
00530  */
00531 #if !defined MEMP_NUM_NETCONN || defined __DOXYGEN__
00532 #define MEMP_NUM_NETCONN                4
00533 #endif
00534 
00535 /**
00536  * MEMP_NUM_SELECT_CB: the number of struct lwip_select_cb.
00537  * (Only needed if you have LWIP_MPU_COMPATIBLE==1 and use the socket API.
00538  * In that case, you need one per thread calling lwip_select.)
00539  */
00540 #if !defined MEMP_NUM_SELECT_CB || defined __DOXYGEN__
00541 #define MEMP_NUM_SELECT_CB              4
00542 #endif
00543 
00544 /**
00545  * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used
00546  * for callback/timeout API communication.
00547  * (only needed if you use tcpip.c)
00548  */
00549 #if !defined MEMP_NUM_TCPIP_MSG_API || defined __DOXYGEN__
00550 #define MEMP_NUM_TCPIP_MSG_API          8
00551 #endif
00552 
00553 /**
00554  * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used
00555  * for incoming packets.
00556  * (only needed if you use tcpip.c)
00557  */
00558 #if !defined MEMP_NUM_TCPIP_MSG_INPKT || defined __DOXYGEN__
00559 #define MEMP_NUM_TCPIP_MSG_INPKT        8
00560 #endif
00561 
00562 /**
00563  * MEMP_NUM_NETDB: the number of concurrently running lwip_addrinfo() calls
00564  * (before freeing the corresponding memory using lwip_freeaddrinfo()).
00565  */
00566 #if !defined MEMP_NUM_NETDB || defined __DOXYGEN__
00567 #define MEMP_NUM_NETDB                  1
00568 #endif
00569 
00570 /**
00571  * MEMP_NUM_LOCALHOSTLIST: the number of host entries in the local host list
00572  * if DNS_LOCAL_HOSTLIST_IS_DYNAMIC==1.
00573  */
00574 #if !defined MEMP_NUM_LOCALHOSTLIST || defined __DOXYGEN__
00575 #define MEMP_NUM_LOCALHOSTLIST          1
00576 #endif
00577 
00578 /**
00579  * PBUF_POOL_SIZE: the number of buffers in the pbuf pool.
00580  */
00581 #if !defined PBUF_POOL_SIZE || defined __DOXYGEN__
00582 #define PBUF_POOL_SIZE                  16
00583 #endif
00584 
00585 /** MEMP_NUM_API_MSG: the number of concurrently active calls to various
00586  * socket, netconn, and tcpip functions
00587  */
00588 #if !defined MEMP_NUM_API_MSG || defined __DOXYGEN__
00589 #define MEMP_NUM_API_MSG                MEMP_NUM_TCPIP_MSG_API
00590 #endif
00591 
00592 /** MEMP_NUM_DNS_API_MSG: the number of concurrently active calls to netconn_gethostbyname
00593  */
00594 #if !defined MEMP_NUM_DNS_API_MSG || defined __DOXYGEN__
00595 #define MEMP_NUM_DNS_API_MSG            MEMP_NUM_TCPIP_MSG_API
00596 #endif
00597 
00598 /** MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA: the number of concurrently active calls
00599  * to getsockopt/setsockopt
00600  */
00601 #if !defined MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA || defined __DOXYGEN__
00602 #define MEMP_NUM_SOCKET_SETGETSOCKOPT_DATA MEMP_NUM_TCPIP_MSG_API
00603 #endif
00604 
00605 /** MEMP_NUM_NETIFAPI_MSG: the number of concurrently active calls to the
00606  * netifapi functions
00607  */
00608 #if !defined MEMP_NUM_NETIFAPI_MSG || defined __DOXYGEN__
00609 #define MEMP_NUM_NETIFAPI_MSG           MEMP_NUM_TCPIP_MSG_API
00610 #endif
00611 /**
00612  * @}
00613  */
00614 
00615 /*
00616    ---------------------------------
00617    ---------- ARP options ----------
00618    ---------------------------------
00619 */
00620 /**
00621  * @defgroup lwip_opts_arp ARP
00622  * @ingroup lwip_opts_ipv4
00623  * @{
00624  */
00625 /**
00626  * LWIP_ARP==1: Enable ARP functionality.
00627  */
00628 #if !defined LWIP_ARP || defined __DOXYGEN__
00629 #define LWIP_ARP                        1
00630 #endif
00631 
00632 /**
00633  * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached.
00634  */
00635 #if !defined ARP_TABLE_SIZE || defined __DOXYGEN__
00636 #define ARP_TABLE_SIZE                  10
00637 #endif
00638 
00639 /** the time an ARP entry stays valid after its last update,
00640  *  for ARP_TMR_INTERVAL = 1000, this is
00641  *  (60 * 5) seconds = 5 minutes.
00642  */
00643 #if !defined ARP_MAXAGE || defined __DOXYGEN__
00644 #define ARP_MAXAGE                      300
00645 #endif
00646 
00647 /**
00648  * ARP_QUEUEING==1: Multiple outgoing packets are queued during hardware address
00649  * resolution. By default, only the most recent packet is queued per IP address.
00650  * This is sufficient for most protocols and mainly reduces TCP connection
00651  * startup time. Set this to 1 if you know your application sends more than one
00652  * packet in a row to an IP address that is not in the ARP cache.
00653  */
00654 #if !defined ARP_QUEUEING || defined __DOXYGEN__
00655 #define ARP_QUEUEING                    0
00656 #endif
00657 
00658 /** The maximum number of packets which may be queued for each
00659  *  unresolved address by other network layers. Defaults to 3, 0 means disabled.
00660  *  Old packets are dropped, new packets are queued.
00661  */
00662 #if !defined ARP_QUEUE_LEN || defined __DOXYGEN__
00663 #define ARP_QUEUE_LEN                   3
00664 #endif
00665 
00666 /**
00667  * ETHARP_SUPPORT_VLAN==1: support receiving and sending ethernet packets with
00668  * VLAN header. See the description of LWIP_HOOK_VLAN_CHECK and
00669  * LWIP_HOOK_VLAN_SET hooks to check/set VLAN headers.
00670  * Additionally, you can define ETHARP_VLAN_CHECK to an u16_t VLAN ID to check.
00671  * If ETHARP_VLAN_CHECK is defined, only VLAN-traffic for this VLAN is accepted.
00672  * If ETHARP_VLAN_CHECK is not defined, all traffic is accepted.
00673  * Alternatively, define a function/define ETHARP_VLAN_CHECK_FN(eth_hdr, vlan)
00674  * that returns 1 to accept a packet or 0 to drop a packet.
00675  */
00676 #if !defined ETHARP_SUPPORT_VLAN || defined __DOXYGEN__
00677 #define ETHARP_SUPPORT_VLAN             0
00678 #endif
00679 
00680 /** LWIP_ETHERNET==1: enable ethernet support even though ARP might be disabled
00681  */
00682 #if !defined LWIP_ETHERNET || defined __DOXYGEN__
00683 #define LWIP_ETHERNET                   LWIP_ARP
00684 #endif
00685 
00686 /** ETH_PAD_SIZE: number of bytes added before the ethernet header to ensure
00687  * alignment of payload after that header. Since the header is 14 bytes long,
00688  * without this padding e.g. addresses in the IP header will not be aligned
00689  * on a 32-bit boundary, so setting this to 2 can speed up 32-bit-platforms.
00690  */
00691 #if !defined ETH_PAD_SIZE || defined __DOXYGEN__
00692 #define ETH_PAD_SIZE                    0
00693 #endif
00694 
00695 /** ETHARP_SUPPORT_STATIC_ENTRIES==1: enable code to support static ARP table
00696  * entries (using etharp_add_static_entry/etharp_remove_static_entry).
00697  */
00698 #if !defined ETHARP_SUPPORT_STATIC_ENTRIES || defined __DOXYGEN__
00699 #define ETHARP_SUPPORT_STATIC_ENTRIES   0
00700 #endif
00701 
00702 /** ETHARP_TABLE_MATCH_NETIF==1: Match netif for ARP table entries.
00703  * If disabled, duplicate IP address on multiple netifs are not supported
00704  * (but this should only occur for AutoIP).
00705  */
00706 #if !defined ETHARP_TABLE_MATCH_NETIF || defined __DOXYGEN__
00707 #define ETHARP_TABLE_MATCH_NETIF        !LWIP_SINGLE_NETIF
00708 #endif
00709 /**
00710  * @}
00711  */
00712 
00713 /*
00714    --------------------------------
00715    ---------- IP options ----------
00716    --------------------------------
00717 */
00718 /**
00719  * @defgroup lwip_opts_ipv4 IPv4
00720  * @ingroup lwip_opts
00721  * @{
00722  */
00723 /**
00724  * LWIP_IPV4==1: Enable IPv4
00725  */
00726 #if !defined LWIP_IPV4 || defined __DOXYGEN__
00727 #define LWIP_IPV4                       1
00728 #endif
00729 
00730 /**
00731  * IP_FORWARD==1: Enables the ability to forward IP packets across network
00732  * interfaces. If you are going to run lwIP on a device with only one network
00733  * interface, define this to 0.
00734  */
00735 #if !defined IP_FORWARD || defined __DOXYGEN__
00736 #define IP_FORWARD                      0
00737 #endif
00738 
00739 /**
00740  * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
00741  * this option does not affect outgoing packet sizes, which can be controlled
00742  * via IP_FRAG.
00743  */
00744 #if !defined IP_REASSEMBLY || defined __DOXYGEN__
00745 #define IP_REASSEMBLY                   1
00746 #endif
00747 
00748 /**
00749  * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
00750  * that this option does not affect incoming packet sizes, which can be
00751  * controlled via IP_REASSEMBLY.
00752  */
00753 #if !defined IP_FRAG || defined __DOXYGEN__
00754 #define IP_FRAG                         1
00755 #endif
00756 
00757 #if !LWIP_IPV4
00758 /* disable IPv4 extensions when IPv4 is disabled */
00759 #undef IP_FORWARD
00760 #define IP_FORWARD                      0
00761 #undef IP_REASSEMBLY
00762 #define IP_REASSEMBLY                   0
00763 #undef IP_FRAG
00764 #define IP_FRAG                         0
00765 #endif /* !LWIP_IPV4 */
00766 
00767 /**
00768  * IP_OPTIONS_ALLOWED: Defines the behavior for IP options.
00769  *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
00770  *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
00771  */
00772 #if !defined IP_OPTIONS_ALLOWED || defined __DOXYGEN__
00773 #define IP_OPTIONS_ALLOWED              1
00774 #endif
00775 
00776 /**
00777  * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
00778  * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
00779  * in this time, the whole packet is discarded.
00780  */
00781 #if !defined IP_REASS_MAXAGE || defined __DOXYGEN__
00782 #define IP_REASS_MAXAGE                 15
00783 #endif
00784 
00785 /**
00786  * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
00787  * Since the received pbufs are enqueued, be sure to configure
00788  * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
00789  * packets even if the maximum amount of fragments is enqueued for reassembly!
00790  * When IPv4 *and* IPv6 are enabled, this even changes to
00791  * (PBUF_POOL_SIZE > 2 * IP_REASS_MAX_PBUFS)!
00792  */
00793 #if !defined IP_REASS_MAX_PBUFS || defined __DOXYGEN__
00794 #define IP_REASS_MAX_PBUFS              10
00795 #endif
00796 
00797 /**
00798  * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers.
00799  */
00800 #if !defined IP_DEFAULT_TTL || defined __DOXYGEN__
00801 #define IP_DEFAULT_TTL                  255
00802 #endif
00803 
00804 /**
00805  * IP_SOF_BROADCAST=1: Use the SOF_BROADCAST field to enable broadcast
00806  * filter per pcb on udp and raw send operations. To enable broadcast filter
00807  * on recv operations, you also have to set IP_SOF_BROADCAST_RECV=1.
00808  */
00809 #if !defined IP_SOF_BROADCAST || defined __DOXYGEN__
00810 #define IP_SOF_BROADCAST                0
00811 #endif
00812 
00813 /**
00814  * IP_SOF_BROADCAST_RECV (requires IP_SOF_BROADCAST=1) enable the broadcast
00815  * filter on recv operations.
00816  */
00817 #if !defined IP_SOF_BROADCAST_RECV || defined __DOXYGEN__
00818 #define IP_SOF_BROADCAST_RECV           0
00819 #endif
00820 
00821 /**
00822  * IP_FORWARD_ALLOW_TX_ON_RX_NETIF==1: allow ip_forward() to send packets back
00823  * out on the netif where it was received. This should only be used for
00824  * wireless networks.
00825  * ATTENTION: When this is 1, make sure your netif driver correctly marks incoming
00826  * link-layer-broadcast/multicast packets as such using the corresponding pbuf flags!
00827  */
00828 #if !defined IP_FORWARD_ALLOW_TX_ON_RX_NETIF || defined __DOXYGEN__
00829 #define IP_FORWARD_ALLOW_TX_ON_RX_NETIF 0
00830 #endif
00831 /**
00832  * @}
00833  */
00834 
00835 /*
00836    ----------------------------------
00837    ---------- ICMP options ----------
00838    ----------------------------------
00839 */
00840 /**
00841  * @defgroup lwip_opts_icmp ICMP
00842  * @ingroup lwip_opts_ipv4
00843  * @{
00844  */
00845 /**
00846  * LWIP_ICMP==1: Enable ICMP module inside the IP stack.
00847  * Be careful, disable that make your product non-compliant to RFC1122
00848  */
00849 #if !defined LWIP_ICMP || defined __DOXYGEN__
00850 #define LWIP_ICMP                       1
00851 #endif
00852 
00853 /**
00854  * ICMP_TTL: Default value for Time-To-Live used by ICMP packets.
00855  */
00856 #if !defined ICMP_TTL || defined __DOXYGEN__
00857 #define ICMP_TTL                        IP_DEFAULT_TTL
00858 #endif
00859 
00860 /**
00861  * LWIP_BROADCAST_PING==1: respond to broadcast pings (default is unicast only)
00862  */
00863 #if !defined LWIP_BROADCAST_PING || defined __DOXYGEN__
00864 #define LWIP_BROADCAST_PING             0
00865 #endif
00866 
00867 /**
00868  * LWIP_MULTICAST_PING==1: respond to multicast pings (default is unicast only)
00869  */
00870 #if !defined LWIP_MULTICAST_PING || defined __DOXYGEN__
00871 #define LWIP_MULTICAST_PING             0
00872 #endif
00873 /**
00874  * @}
00875  */
00876 
00877 /*
00878    ---------------------------------
00879    ---------- RAW options ----------
00880    ---------------------------------
00881 */
00882 /**
00883  * @defgroup lwip_opts_raw RAW
00884  * @ingroup lwip_opts_callback
00885  * @{
00886  */
00887 /**
00888  * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
00889  */
00890 #if !defined LWIP_RAW || defined __DOXYGEN__
00891 #define LWIP_RAW                        0
00892 #endif
00893 
00894 /**
00895  * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
00896  */
00897 #if !defined RAW_TTL || defined __DOXYGEN__
00898 #define RAW_TTL                         IP_DEFAULT_TTL
00899 #endif
00900 /**
00901  * @}
00902  */
00903 
00904 /*
00905    ----------------------------------
00906    ---------- DHCP options ----------
00907    ----------------------------------
00908 */
00909 /**
00910  * @defgroup lwip_opts_dhcp DHCP
00911  * @ingroup lwip_opts_ipv4
00912  * @{
00913  */
00914 /**
00915  * LWIP_DHCP==1: Enable DHCP module.
00916  */
00917 #if !defined LWIP_DHCP || defined __DOXYGEN__
00918 #define LWIP_DHCP                       0
00919 #endif
00920 #if !LWIP_IPV4
00921 /* disable DHCP when IPv4 is disabled */
00922 #undef LWIP_DHCP
00923 #define LWIP_DHCP                       0
00924 #endif /* !LWIP_IPV4 */
00925 
00926 /**
00927  * DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address.
00928  */
00929 #if !defined DHCP_DOES_ARP_CHECK || defined __DOXYGEN__
00930 #define DHCP_DOES_ARP_CHECK             (LWIP_DHCP && LWIP_ARP)
00931 #endif
00932 
00933 /**
00934  * LWIP_DHCP_BOOTP_FILE==1: Store offered_si_addr and boot_file_name.
00935  */
00936 #if !defined LWIP_DHCP_BOOTP_FILE || defined __DOXYGEN__
00937 #define LWIP_DHCP_BOOTP_FILE            0
00938 #endif
00939 
00940 /**
00941  * LWIP_DHCP_GETS_NTP==1: Request NTP servers with discover/select. For each
00942  * response packet, an callback is called, which has to be provided by the port:
00943  * void dhcp_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs);
00944 */
00945 #if !defined LWIP_DHCP_GET_NTP_SRV || defined __DOXYGEN__
00946 #define LWIP_DHCP_GET_NTP_SRV           0
00947 #endif
00948 
00949 /**
00950  * The maximum of NTP servers requested
00951  */
00952 #if !defined LWIP_DHCP_MAX_NTP_SERVERS || defined __DOXYGEN__
00953 #define LWIP_DHCP_MAX_NTP_SERVERS       1
00954 #endif
00955 
00956 /**
00957  * LWIP_DHCP_MAX_DNS_SERVERS > 0: Request DNS servers with discover/select.
00958  * DNS servers received in the response are passed to DNS via @ref dns_setserver()
00959  * (up to the maximum limit defined here).
00960  */
00961 #if !defined LWIP_DHCP_MAX_DNS_SERVERS || defined __DOXYGEN__
00962 #define LWIP_DHCP_MAX_DNS_SERVERS       DNS_MAX_SERVERS
00963 #endif
00964 /**
00965  * @}
00966  */
00967 
00968 /*
00969    ------------------------------------
00970    ---------- AUTOIP options ----------
00971    ------------------------------------
00972 */
00973 /**
00974  * @defgroup lwip_opts_autoip AUTOIP
00975  * @ingroup lwip_opts_ipv4
00976  * @{
00977  */
00978 /**
00979  * LWIP_AUTOIP==1: Enable AUTOIP module.
00980  */
00981 #if !defined LWIP_AUTOIP || defined __DOXYGEN__
00982 #define LWIP_AUTOIP                     0
00983 #endif
00984 #if !LWIP_IPV4
00985 /* disable AUTOIP when IPv4 is disabled */
00986 #undef LWIP_AUTOIP
00987 #define LWIP_AUTOIP                     0
00988 #endif /* !LWIP_IPV4 */
00989 
00990 /**
00991  * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on
00992  * the same interface at the same time.
00993  */
00994 #if !defined LWIP_DHCP_AUTOIP_COOP || defined __DOXYGEN__
00995 #define LWIP_DHCP_AUTOIP_COOP           0
00996 #endif
00997 
00998 /**
00999  * LWIP_DHCP_AUTOIP_COOP_TRIES: Set to the number of DHCP DISCOVER probes
01000  * that should be sent before falling back on AUTOIP (the DHCP client keeps
01001  * running in this case). This can be set as low as 1 to get an AutoIP address
01002  * very  quickly, but you should be prepared to handle a changing IP address
01003  * when DHCP overrides AutoIP.
01004  */
01005 #if !defined LWIP_DHCP_AUTOIP_COOP_TRIES || defined __DOXYGEN__
01006 #define LWIP_DHCP_AUTOIP_COOP_TRIES     9
01007 #endif
01008 /**
01009  * @}
01010  */
01011 
01012 /*
01013    ----------------------------------
01014    ----- SNMP MIB2 support      -----
01015    ----------------------------------
01016 */
01017 /**
01018  * @defgroup lwip_opts_mib2 SNMP MIB2 callbacks
01019  * @ingroup lwip_opts_infrastructure
01020  * @{
01021  */
01022 /**
01023  * LWIP_MIB2_CALLBACKS==1: Turn on SNMP MIB2 callbacks.
01024  * Turn this on to get callbacks needed to implement MIB2.
01025  * Usually MIB2_STATS should be enabled, too.
01026  */
01027 #if !defined LWIP_MIB2_CALLBACKS || defined __DOXYGEN__
01028 #define LWIP_MIB2_CALLBACKS             0
01029 #endif
01030 /**
01031  * @}
01032  */
01033 
01034 /*
01035    ----------------------------------
01036    -------- Multicast options -------
01037    ----------------------------------
01038 */
01039 /**
01040  * @defgroup lwip_opts_multicast Multicast
01041  * @ingroup lwip_opts_infrastructure
01042  * @{
01043  */
01044 /**
01045  * LWIP_MULTICAST_TX_OPTIONS==1: Enable multicast TX support like the socket options
01046  * IP_MULTICAST_TTL/IP_MULTICAST_IF/IP_MULTICAST_LOOP, as well as (currently only)
01047  * core support for the corresponding IPv6 options.
01048  */
01049 #if !defined LWIP_MULTICAST_TX_OPTIONS || defined __DOXYGEN__
01050 #define LWIP_MULTICAST_TX_OPTIONS       ((LWIP_IGMP || LWIP_IPV6_MLD) && (LWIP_UDP || LWIP_RAW))
01051 #endif
01052 /**
01053  * @}
01054  */
01055 
01056 /*
01057    ----------------------------------
01058    ---------- IGMP options ----------
01059    ----------------------------------
01060 */
01061 /**
01062  * @defgroup lwip_opts_igmp IGMP
01063  * @ingroup lwip_opts_ipv4
01064  * @{
01065  */
01066 /**
01067  * LWIP_IGMP==1: Turn on IGMP module.
01068  */
01069 #if !defined LWIP_IGMP || defined __DOXYGEN__
01070 #define LWIP_IGMP                       0
01071 #endif
01072 #if !LWIP_IPV4
01073 #undef LWIP_IGMP
01074 #define LWIP_IGMP                       0
01075 #endif
01076 /**
01077  * @}
01078  */
01079 
01080 /*
01081    ----------------------------------
01082    ---------- DNS options -----------
01083    ----------------------------------
01084 */
01085 /**
01086  * @defgroup lwip_opts_dns DNS
01087  * @ingroup lwip_opts_callback
01088  * @{
01089  */
01090 /**
01091  * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS
01092  * transport.
01093  */
01094 #if !defined LWIP_DNS || defined __DOXYGEN__
01095 #define LWIP_DNS                        0
01096 #endif
01097 
01098 /** DNS maximum number of entries to maintain locally. */
01099 #if !defined DNS_TABLE_SIZE || defined __DOXYGEN__
01100 #define DNS_TABLE_SIZE                  4
01101 #endif
01102 
01103 /** DNS maximum host name length supported in the name table. */
01104 #if !defined DNS_MAX_NAME_LENGTH || defined __DOXYGEN__
01105 #define DNS_MAX_NAME_LENGTH             256
01106 #endif
01107 
01108 /** The maximum of DNS servers
01109  * The first server can be initialized automatically by defining
01110  * DNS_SERVER_ADDRESS(ipaddr), where 'ipaddr' is an 'ip_addr_t*'
01111  */
01112 #if !defined DNS_MAX_SERVERS || defined __DOXYGEN__
01113 #define DNS_MAX_SERVERS                 2
01114 #endif
01115 
01116 /** DNS maximum number of retries when asking for a name, before "timeout". */
01117 #if !defined DNS_MAX_RETRIES || defined __DOXYGEN__
01118 #define DNS_MAX_RETRIES                 4
01119 #endif
01120 
01121 /** DNS do a name checking between the query and the response. */
01122 #if !defined DNS_DOES_NAME_CHECK || defined __DOXYGEN__
01123 #define DNS_DOES_NAME_CHECK             1
01124 #endif
01125 
01126 /** LWIP_DNS_SECURE: controls the security level of the DNS implementation
01127  * Use all DNS security features by default.
01128  * This is overridable but should only be needed by very small targets
01129  * or when using against non standard DNS servers. */
01130 #if !defined LWIP_DNS_SECURE || defined __DOXYGEN__
01131 #define LWIP_DNS_SECURE (LWIP_DNS_SECURE_RAND_XID | LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING | LWIP_DNS_SECURE_RAND_SRC_PORT)
01132 #endif
01133 
01134 /* A list of DNS security features follows */
01135 #define LWIP_DNS_SECURE_RAND_XID                1
01136 #define LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING 2
01137 #define LWIP_DNS_SECURE_RAND_SRC_PORT           4
01138 
01139 /** DNS_LOCAL_HOSTLIST: Implements a local host-to-address list. If enabled, you have to define an initializer:
01140  *  \#define DNS_LOCAL_HOSTLIST_INIT {DNS_LOCAL_HOSTLIST_ELEM("host_ip4", IPADDR4_INIT_BYTES(1,2,3,4)), \
01141  *                                    DNS_LOCAL_HOSTLIST_ELEM("host_ip6", IPADDR6_INIT_HOST(123, 234, 345, 456)}
01142  *
01143  *  Instead, you can also use an external function:
01144  *  \#define DNS_LOOKUP_LOCAL_EXTERN(x) extern err_t my_lookup_function(const char *name, ip_addr_t *addr, u8_t dns_addrtype)
01145  *  that looks up the IP address and returns ERR_OK if found (LWIP_DNS_ADDRTYPE_xxx is passed in dns_addrtype).
01146  */
01147 #if !defined DNS_LOCAL_HOSTLIST || defined __DOXYGEN__
01148 #define DNS_LOCAL_HOSTLIST              0
01149 #endif /* DNS_LOCAL_HOSTLIST */
01150 
01151 /** If this is turned on, the local host-list can be dynamically changed
01152  *  at runtime. */
01153 #if !defined DNS_LOCAL_HOSTLIST_IS_DYNAMIC || defined __DOXYGEN__
01154 #define DNS_LOCAL_HOSTLIST_IS_DYNAMIC   0
01155 #endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
01156 
01157 /** Set this to 1 to enable querying ".local" names via mDNS
01158  *  using a One-Shot Multicast DNS Query */
01159 #if !defined LWIP_DNS_SUPPORT_MDNS_QUERIES || defined __DOXYGEN__
01160 #define LWIP_DNS_SUPPORT_MDNS_QUERIES   0
01161 #endif
01162 /**
01163  * @}
01164  */
01165 
01166 /*
01167    ---------------------------------
01168    ---------- UDP options ----------
01169    ---------------------------------
01170 */
01171 /**
01172  * @defgroup lwip_opts_udp UDP
01173  * @ingroup lwip_opts_callback
01174  * @{
01175  */
01176 /**
01177  * LWIP_UDP==1: Turn on UDP.
01178  */
01179 #if !defined LWIP_UDP || defined __DOXYGEN__
01180 #define LWIP_UDP                        1
01181 #endif
01182 
01183 /**
01184  * LWIP_UDPLITE==1: Turn on UDP-Lite. (Requires LWIP_UDP)
01185  */
01186 #if !defined LWIP_UDPLITE || defined __DOXYGEN__
01187 #define LWIP_UDPLITE                    0
01188 #endif
01189 
01190 /**
01191  * UDP_TTL: Default Time-To-Live value.
01192  */
01193 #if !defined UDP_TTL || defined __DOXYGEN__
01194 #define UDP_TTL                         IP_DEFAULT_TTL
01195 #endif
01196 
01197 /**
01198  * LWIP_NETBUF_RECVINFO==1: append destination addr and port to every netbuf.
01199  */
01200 #if !defined LWIP_NETBUF_RECVINFO || defined __DOXYGEN__
01201 #define LWIP_NETBUF_RECVINFO            0
01202 #endif
01203 /**
01204  * @}
01205  */
01206 
01207 /*
01208    ---------------------------------
01209    ---------- TCP options ----------
01210    ---------------------------------
01211 */
01212 /**
01213  * @defgroup lwip_opts_tcp TCP
01214  * @ingroup lwip_opts_callback
01215  * @{
01216  */
01217 /**
01218  * LWIP_TCP==1: Turn on TCP.
01219  */
01220 #if !defined LWIP_TCP || defined __DOXYGEN__
01221 #define LWIP_TCP                        1
01222 #endif
01223 
01224 /**
01225  * TCP_TTL: Default Time-To-Live value.
01226  */
01227 #if !defined TCP_TTL || defined __DOXYGEN__
01228 #define TCP_TTL                         IP_DEFAULT_TTL
01229 #endif
01230 
01231 /**
01232  * TCP_WND: The size of a TCP window.  This must be at least
01233  * (2 * TCP_MSS) for things to work well.
01234  * ATTENTION: when using TCP_RCV_SCALE, TCP_WND is the total size
01235  * with scaling applied. Maximum window value in the TCP header
01236  * will be TCP_WND >> TCP_RCV_SCALE
01237  */
01238 #if !defined TCP_WND || defined __DOXYGEN__
01239 #define TCP_WND                         (4 * TCP_MSS)
01240 #endif
01241 
01242 /**
01243  * TCP_MAXRTX: Maximum number of retransmissions of data segments.
01244  */
01245 #if !defined TCP_MAXRTX || defined __DOXYGEN__
01246 #define TCP_MAXRTX                      12
01247 #endif
01248 
01249 /**
01250  * TCP_SYNMAXRTX: Maximum number of retransmissions of SYN segments.
01251  */
01252 #if !defined TCP_SYNMAXRTX || defined __DOXYGEN__
01253 #define TCP_SYNMAXRTX                   6
01254 #endif
01255 
01256 /**
01257  * TCP_QUEUE_OOSEQ==1: TCP will queue segments that arrive out of order.
01258  * Define to 0 if your device is low on memory.
01259  */
01260 #if !defined TCP_QUEUE_OOSEQ || defined __DOXYGEN__
01261 #define TCP_QUEUE_OOSEQ                 LWIP_TCP
01262 #endif
01263 
01264 /**
01265  * LWIP_TCP_SACK_OUT==1: TCP will support sending selective acknowledgements (SACKs).
01266  */
01267 #if !defined LWIP_TCP_SACK_OUT || defined __DOXYGEN__
01268 #define LWIP_TCP_SACK_OUT               0
01269 #endif
01270 
01271 /**
01272  * LWIP_TCP_MAX_SACK_NUM: The maximum number of SACK values to include in TCP segments.
01273  * Must be at least 1, but is only used if LWIP_TCP_SACK_OUT is enabled.
01274  * NOTE: Even though we never send more than 3 or 4 SACK ranges in a single segment
01275  * (depending on other options), setting this option to values greater than 4 is not pointless.
01276  * This is basically the max number of SACK ranges we want to keep track of.
01277  * As new data is delivered, some of the SACK ranges may be removed or merged.
01278  * In that case some of those older SACK ranges may be used again.
01279  * The amount of memory used to store SACK ranges is LWIP_TCP_MAX_SACK_NUM * 8 bytes for each TCP PCB.
01280  */
01281 #if !defined LWIP_TCP_MAX_SACK_NUM || defined __DOXYGEN__
01282 #define LWIP_TCP_MAX_SACK_NUM           4
01283 #endif
01284 
01285 /**
01286  * TCP_MSS: TCP Maximum segment size. (default is 536, a conservative default,
01287  * you might want to increase this.)
01288  * For the receive side, this MSS is advertised to the remote side
01289  * when opening a connection. For the transmit size, this MSS sets
01290  * an upper limit on the MSS advertised by the remote host.
01291  */
01292 #if !defined TCP_MSS || defined __DOXYGEN__
01293 #define TCP_MSS                         536
01294 #endif
01295 
01296 /**
01297  * TCP_CALCULATE_EFF_SEND_MSS: "The maximum size of a segment that TCP really
01298  * sends, the 'effective send MSS,' MUST be the smaller of the send MSS (which
01299  * reflects the available reassembly buffer size at the remote host) and the
01300  * largest size permitted by the IP layer" (RFC 1122)
01301  * Setting this to 1 enables code that checks TCP_MSS against the MTU of the
01302  * netif used for a connection and limits the MSS if it would be too big otherwise.
01303  */
01304 #if !defined TCP_CALCULATE_EFF_SEND_MSS || defined __DOXYGEN__
01305 #define TCP_CALCULATE_EFF_SEND_MSS      1
01306 #endif
01307 
01308 
01309 /**
01310  * TCP_SND_BUF: TCP sender buffer space (bytes).
01311  * To achieve good performance, this should be at least 2 * TCP_MSS.
01312  */
01313 #if !defined TCP_SND_BUF || defined __DOXYGEN__
01314 #define TCP_SND_BUF                     (2 * TCP_MSS)
01315 #endif
01316 
01317 /**
01318  * TCP_SND_QUEUELEN: TCP sender buffer space (pbufs). This must be at least
01319  * as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work.
01320  */
01321 #if !defined TCP_SND_QUEUELEN || defined __DOXYGEN__
01322 #define TCP_SND_QUEUELEN                ((4 * (TCP_SND_BUF) + (TCP_MSS - 1))/(TCP_MSS))
01323 #endif
01324 
01325 /**
01326  * TCP_SNDLOWAT: TCP writable space (bytes). This must be less than
01327  * TCP_SND_BUF. It is the amount of space which must be available in the
01328  * TCP snd_buf for select to return writable (combined with TCP_SNDQUEUELOWAT).
01329  */
01330 #if !defined TCP_SNDLOWAT || defined __DOXYGEN__
01331 #define TCP_SNDLOWAT                    LWIP_MIN(LWIP_MAX(((TCP_SND_BUF)/2), (2 * TCP_MSS) + 1), (TCP_SND_BUF) - 1)
01332 #endif
01333 
01334 /**
01335  * TCP_SNDQUEUELOWAT: TCP writable bufs (pbuf count). This must be less
01336  * than TCP_SND_QUEUELEN. If the number of pbufs queued on a pcb drops below
01337  * this number, select returns writable (combined with TCP_SNDLOWAT).
01338  */
01339 #if !defined TCP_SNDQUEUELOWAT || defined __DOXYGEN__
01340 #define TCP_SNDQUEUELOWAT               LWIP_MAX(((TCP_SND_QUEUELEN)/2), 5)
01341 #endif
01342 
01343 /**
01344  * TCP_OOSEQ_MAX_BYTES: The default maximum number of bytes queued on ooseq per
01345  * pcb if TCP_OOSEQ_BYTES_LIMIT is not defined. Default is 0 (no limit).
01346  * Only valid for TCP_QUEUE_OOSEQ==1.
01347  */
01348 #if !defined TCP_OOSEQ_MAX_BYTES || defined __DOXYGEN__
01349 #define TCP_OOSEQ_MAX_BYTES             0
01350 #endif
01351 
01352 /**
01353  * TCP_OOSEQ_BYTES_LIMIT(pcb): Return the maximum number of bytes to be queued
01354  * on ooseq per pcb, given the pcb. Only valid for TCP_QUEUE_OOSEQ==1 &&
01355  * TCP_OOSEQ_MAX_BYTES==1.
01356  * Use this to override TCP_OOSEQ_MAX_BYTES to a dynamic value per pcb.
01357  */
01358 #if !defined TCP_OOSEQ_BYTES_LIMIT
01359 #if TCP_OOSEQ_MAX_BYTES
01360 #define TCP_OOSEQ_BYTES_LIMIT(pcb)      TCP_OOSEQ_MAX_BYTES
01361 #elif defined __DOXYGEN__
01362 #define TCP_OOSEQ_BYTES_LIMIT(pcb)
01363 #endif
01364 #endif
01365 
01366 /**
01367  * TCP_OOSEQ_MAX_PBUFS: The default maximum number of pbufs queued on ooseq per
01368  * pcb if TCP_OOSEQ_BYTES_LIMIT is not defined. Default is 0 (no limit).
01369  * Only valid for TCP_QUEUE_OOSEQ==1.
01370  */
01371 #if !defined TCP_OOSEQ_MAX_PBUFS || defined __DOXYGEN__
01372 #define TCP_OOSEQ_MAX_PBUFS             0
01373 #endif
01374 
01375 /**
01376  * TCP_OOSEQ_PBUFS_LIMIT(pcb): Return the maximum number of pbufs to be queued
01377  * on ooseq per pcb, given the pcb.  Only valid for TCP_QUEUE_OOSEQ==1 &&
01378  * TCP_OOSEQ_MAX_PBUFS==1.
01379  * Use this to override TCP_OOSEQ_MAX_PBUFS to a dynamic value per pcb.
01380  */
01381 #if !defined TCP_OOSEQ_PBUFS_LIMIT
01382 #if TCP_OOSEQ_MAX_PBUFS
01383 #define TCP_OOSEQ_PBUFS_LIMIT(pcb)      TCP_OOSEQ_MAX_PBUFS
01384 #elif defined __DOXYGEN__
01385 #define TCP_OOSEQ_PBUFS_LIMIT(pcb)
01386 #endif
01387 #endif
01388 
01389 /**
01390  * TCP_LISTEN_BACKLOG: Enable the backlog option for tcp listen pcb.
01391  */
01392 #if !defined TCP_LISTEN_BACKLOG || defined __DOXYGEN__
01393 #define TCP_LISTEN_BACKLOG              0
01394 #endif
01395 
01396 /**
01397  * The maximum allowed backlog for TCP listen netconns.
01398  * This backlog is used unless another is explicitly specified.
01399  * 0xff is the maximum (u8_t).
01400  */
01401 #if !defined TCP_DEFAULT_LISTEN_BACKLOG || defined __DOXYGEN__
01402 #define TCP_DEFAULT_LISTEN_BACKLOG      0xff
01403 #endif
01404 
01405 /**
01406  * TCP_OVERSIZE: The maximum number of bytes that tcp_write may
01407  * allocate ahead of time in an attempt to create shorter pbuf chains
01408  * for transmission. The meaningful range is 0 to TCP_MSS. Some
01409  * suggested values are:
01410  *
01411  * 0:         Disable oversized allocation. Each tcp_write() allocates a new
01412               pbuf (old behaviour).
01413  * 1:         Allocate size-aligned pbufs with minimal excess. Use this if your
01414  *            scatter-gather DMA requires aligned fragments.
01415  * 128:       Limit the pbuf/memory overhead to 20%.
01416  * TCP_MSS:   Try to create unfragmented TCP packets.
01417  * TCP_MSS/4: Try to create 4 fragments or less per TCP packet.
01418  */
01419 #if !defined TCP_OVERSIZE || defined __DOXYGEN__
01420 #define TCP_OVERSIZE                    TCP_MSS
01421 #endif
01422 
01423 /**
01424  * LWIP_TCP_TIMESTAMPS==1: support the TCP timestamp option.
01425  * The timestamp option is currently only used to help remote hosts, it is not
01426  * really used locally. Therefore, it is only enabled when a TS option is
01427  * received in the initial SYN packet from a remote host.
01428  */
01429 #if !defined LWIP_TCP_TIMESTAMPS || defined __DOXYGEN__
01430 #define LWIP_TCP_TIMESTAMPS             0
01431 #endif
01432 
01433 /**
01434  * TCP_WND_UPDATE_THRESHOLD: difference in window to trigger an
01435  * explicit window update
01436  */
01437 #if !defined TCP_WND_UPDATE_THRESHOLD || defined __DOXYGEN__
01438 #define TCP_WND_UPDATE_THRESHOLD        LWIP_MIN((TCP_WND / 4), (TCP_MSS * 4))
01439 #endif
01440 
01441 /**
01442  * LWIP_EVENT_API and LWIP_CALLBACK_API: Only one of these should be set to 1.
01443  *     LWIP_EVENT_API==1: The user defines lwip_tcp_event() to receive all
01444  *         events (accept, sent, etc) that happen in the system.
01445  *     LWIP_CALLBACK_API==1: The PCB callback function is called directly
01446  *         for the event. This is the default.
01447  */
01448 #if !defined(LWIP_EVENT_API) && !defined(LWIP_CALLBACK_API) || defined __DOXYGEN__
01449 #define LWIP_EVENT_API                  0
01450 #define LWIP_CALLBACK_API               1
01451 #else
01452 #ifndef LWIP_EVENT_API
01453 #define LWIP_EVENT_API                  0
01454 #endif
01455 #ifndef LWIP_CALLBACK_API
01456 #define LWIP_CALLBACK_API               0
01457 #endif
01458 #endif
01459 
01460 /**
01461  * LWIP_WND_SCALE and TCP_RCV_SCALE:
01462  * Set LWIP_WND_SCALE to 1 to enable window scaling.
01463  * Set TCP_RCV_SCALE to the desired scaling factor (shift count in the
01464  * range of [0..14]).
01465  * When LWIP_WND_SCALE is enabled but TCP_RCV_SCALE is 0, we can use a large
01466  * send window while having a small receive window only.
01467  */
01468 #if !defined LWIP_WND_SCALE || defined __DOXYGEN__
01469 #define LWIP_WND_SCALE                  0
01470 #define TCP_RCV_SCALE                   0
01471 #endif
01472 
01473 /**
01474  * LWIP_TCP_PCB_NUM_EXT_ARGS:
01475  * When this is > 0, every tcp pcb (including listen pcb) includes a number of
01476  * additional argument entries in an array (see tcp_ext_arg_alloc_id)
01477  */
01478 #if !defined LWIP_TCP_PCB_NUM_EXT_ARGS || defined __DOXYGEN__
01479 #define LWIP_TCP_PCB_NUM_EXT_ARGS       0
01480 #endif
01481 
01482 /** LWIP_ALTCP==1: enable the altcp API.
01483  * altcp is an abstraction layer that prevents applications linking against the
01484  * tcp.h functions but provides the same functionality. It is used to e.g. add
01485  * SSL/TLS or proxy-connect support to an application written for the tcp callback
01486  * API without that application knowing the protocol details.
01487  *
01488  * With LWIP_ALTCP==0, applications written against the altcp API can still be
01489  * compiled but are directly linked against the tcp.h callback API and then
01490  * cannot use layered protocols.
01491  *
01492  * See @ref altcp_api
01493  */
01494 #if !defined LWIP_ALTCP || defined __DOXYGEN__
01495 #define LWIP_ALTCP                      0
01496 #endif
01497 
01498 /** LWIP_ALTCP_TLS==1: enable TLS support for altcp API.
01499  * This needs a port of the functions in altcp_tls.h to a TLS library.
01500  * A port to ARM mbedtls is provided with lwIP, see apps/altcp_tls/ directory
01501  * and LWIP_ALTCP_TLS_MBEDTLS option.
01502  */
01503 #if !defined LWIP_ALTCP_TLS || defined __DOXYGEN__
01504 #define LWIP_ALTCP_TLS                  0
01505 #endif
01506 
01507 /**
01508  * @}
01509  */
01510 
01511 /*
01512    ----------------------------------
01513    ---------- Pbuf options ----------
01514    ----------------------------------
01515 */
01516 /**
01517  * @defgroup lwip_opts_pbuf PBUF
01518  * @ingroup lwip_opts
01519  * @{
01520  */
01521 /**
01522  * PBUF_LINK_HLEN: the number of bytes that should be allocated for a
01523  * link level header. The default is 14, the standard value for
01524  * Ethernet.
01525  */
01526 #if !defined PBUF_LINK_HLEN || defined __DOXYGEN__
01527 #if defined LWIP_HOOK_VLAN_SET && !defined __DOXYGEN__
01528 #define PBUF_LINK_HLEN                  (18 + ETH_PAD_SIZE)
01529 #else /* LWIP_HOOK_VLAN_SET */
01530 #define PBUF_LINK_HLEN                  (14 + ETH_PAD_SIZE)
01531 #endif /* LWIP_HOOK_VLAN_SET */
01532 #endif
01533 
01534 /**
01535  * PBUF_LINK_ENCAPSULATION_HLEN: the number of bytes that should be allocated
01536  * for an additional encapsulation header before ethernet headers (e.g. 802.11)
01537  */
01538 #if !defined PBUF_LINK_ENCAPSULATION_HLEN || defined __DOXYGEN__
01539 #define PBUF_LINK_ENCAPSULATION_HLEN    0
01540 #endif
01541 
01542 /**
01543  * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
01544  * designed to accommodate single full size TCP frame in one pbuf, including
01545  * TCP_MSS, IP header, and link header.
01546  */
01547 #if !defined PBUF_POOL_BUFSIZE || defined __DOXYGEN__
01548 #define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_ENCAPSULATION_HLEN+PBUF_LINK_HLEN)
01549 #endif
01550 
01551 /**
01552  * LWIP_PBUF_REF_T: Refcount type in pbuf.
01553  * Default width of u8_t can be increased if 255 refs are not enough for you.
01554  */
01555 #if !defined LWIP_PBUF_REF_T || defined __DOXYGEN__
01556 #define LWIP_PBUF_REF_T                 u8_t
01557 #endif
01558 /**
01559  * @}
01560  */
01561 
01562 /*
01563    ------------------------------------------------
01564    ---------- Network Interfaces options ----------
01565    ------------------------------------------------
01566 */
01567 /**
01568  * @defgroup lwip_opts_netif NETIF
01569  * @ingroup lwip_opts
01570  * @{
01571  */
01572 /**
01573  * LWIP_SINGLE_NETIF==1: use a single netif only. This is the common case for
01574  * small real-life targets. Some code like routing etc. can be left out.
01575  */
01576 #if !defined LWIP_SINGLE_NETIF || defined __DOXYGEN__
01577 #define LWIP_SINGLE_NETIF               0
01578 #endif
01579 
01580 /**
01581  * LWIP_NETIF_HOSTNAME==1: use DHCP_OPTION_HOSTNAME with netif's hostname
01582  * field.
01583  */
01584 #if !defined LWIP_NETIF_HOSTNAME || defined __DOXYGEN__
01585 #define LWIP_NETIF_HOSTNAME             0
01586 #endif
01587 
01588 /**
01589  * LWIP_NETIF_API==1: Support netif api (in netifapi.c)
01590  */
01591 #if !defined LWIP_NETIF_API || defined __DOXYGEN__
01592 #define LWIP_NETIF_API                  0
01593 #endif
01594 
01595 /**
01596  * LWIP_NETIF_STATUS_CALLBACK==1: Support a callback function whenever an interface
01597  * changes its up/down status (i.e., due to DHCP IP acquisition)
01598  */
01599 #if !defined LWIP_NETIF_STATUS_CALLBACK || defined __DOXYGEN__
01600 #define LWIP_NETIF_STATUS_CALLBACK      0
01601 #endif
01602 
01603 /**
01604  * LWIP_NETIF_EXT_STATUS_CALLBACK==1: Support an extended callback function 
01605  * for several netif related event that supports multiple subscribers.
01606  * @see netif_ext_status_callback
01607  */
01608 #if !defined LWIP_NETIF_EXT_STATUS_CALLBACK || defined __DOXYGEN__
01609 #define LWIP_NETIF_EXT_STATUS_CALLBACK  0
01610 #endif
01611 
01612 /**
01613  * LWIP_NETIF_LINK_CALLBACK==1: Support a callback function from an interface
01614  * whenever the link changes (i.e., link down)
01615  */
01616 #if !defined LWIP_NETIF_LINK_CALLBACK || defined __DOXYGEN__
01617 #define LWIP_NETIF_LINK_CALLBACK        0
01618 #endif
01619 
01620 /**
01621  * LWIP_NETIF_REMOVE_CALLBACK==1: Support a callback function that is called
01622  * when a netif has been removed
01623  */
01624 #if !defined LWIP_NETIF_REMOVE_CALLBACK || defined __DOXYGEN__
01625 #define LWIP_NETIF_REMOVE_CALLBACK      0
01626 #endif
01627 
01628 /**
01629  * LWIP_NETIF_HWADDRHINT==1: Cache link-layer-address hints (e.g. table
01630  * indices) in struct netif. TCP and UDP can make use of this to prevent
01631  * scanning the ARP table for every sent packet. While this is faster for big
01632  * ARP tables or many concurrent connections, it might be counterproductive
01633  * if you have a tiny ARP table or if there never are concurrent connections.
01634  */
01635 #if !defined LWIP_NETIF_HWADDRHINT || defined __DOXYGEN__
01636 #define LWIP_NETIF_HWADDRHINT           0
01637 #endif
01638 
01639 /**
01640  * LWIP_NETIF_TX_SINGLE_PBUF: if this is set to 1, lwIP *tries* to put all data
01641  * to be sent into one single pbuf. This is for compatibility with DMA-enabled
01642  * MACs that do not support scatter-gather.
01643  * Beware that this might involve CPU-memcpy before transmitting that would not
01644  * be needed without this flag! Use this only if you need to!
01645  *
01646  * ATTENTION: a driver should *NOT* rely on getting single pbufs but check TX
01647  * pbufs for being in one piece. If not, @ref pbuf_clone can be used to get
01648  * a single pbuf:
01649  *   if (p->next != NULL) {
01650  *     struct pbuf *q = pbuf_clone(PBUF_RAW, PBUF_RAM, p);
01651  *     if (q == NULL) {
01652  *       return ERR_MEM;
01653  *     }
01654  *     p = q; ATTENTION: do NOT free the old 'p' as the ref belongs to the caller!
01655  *   }
01656  */
01657 #if !defined LWIP_NETIF_TX_SINGLE_PBUF || defined __DOXYGEN__
01658 #define LWIP_NETIF_TX_SINGLE_PBUF       0
01659 #endif /* LWIP_NETIF_TX_SINGLE_PBUF */
01660 
01661 /**
01662  * LWIP_NUM_NETIF_CLIENT_DATA: Number of clients that may store
01663  * data in client_data member array of struct netif (max. 256).
01664  */
01665 #if !defined LWIP_NUM_NETIF_CLIENT_DATA || defined __DOXYGEN__
01666 #define LWIP_NUM_NETIF_CLIENT_DATA      0
01667 #endif
01668 /**
01669  * @}
01670  */
01671 
01672 /*
01673    ------------------------------------
01674    ---------- LOOPIF options ----------
01675    ------------------------------------
01676 */
01677 /**
01678  * @defgroup lwip_opts_loop Loopback interface
01679  * @ingroup lwip_opts_netif
01680  * @{
01681  */
01682 /**
01683  * LWIP_HAVE_LOOPIF==1: Support loop interface (127.0.0.1).
01684  * This is only needed when no real netifs are available. If at least one other
01685  * netif is available, loopback traffic uses this netif.
01686  */
01687 #if !defined LWIP_HAVE_LOOPIF || defined __DOXYGEN__
01688 #define LWIP_HAVE_LOOPIF                (LWIP_NETIF_LOOPBACK && !LWIP_SINGLE_NETIF)
01689 #endif
01690 
01691 /**
01692  * LWIP_LOOPIF_MULTICAST==1: Support multicast/IGMP on loop interface (127.0.0.1).
01693  */
01694 #if !defined LWIP_LOOPIF_MULTICAST || defined __DOXYGEN__
01695 #define LWIP_LOOPIF_MULTICAST           0
01696 #endif
01697 
01698 /**
01699  * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
01700  * address equal to the netif IP address, looping them back up the stack.
01701  */
01702 #if !defined LWIP_NETIF_LOOPBACK || defined __DOXYGEN__
01703 #define LWIP_NETIF_LOOPBACK             0
01704 #endif
01705 
01706 /**
01707  * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback
01708  * sending for each netif (0 = disabled)
01709  */
01710 #if !defined LWIP_LOOPBACK_MAX_PBUFS || defined __DOXYGEN__
01711 #define LWIP_LOOPBACK_MAX_PBUFS         0
01712 #endif
01713 
01714 /**
01715  * LWIP_NETIF_LOOPBACK_MULTITHREADING: Indicates whether threading is enabled in
01716  * the system, as netifs must change how they behave depending on this setting
01717  * for the LWIP_NETIF_LOOPBACK option to work.
01718  * Setting this is needed to avoid reentering non-reentrant functions like
01719  * tcp_input().
01720  *    LWIP_NETIF_LOOPBACK_MULTITHREADING==1: Indicates that the user is using a
01721  *       multithreaded environment like tcpip.c. In this case, netif->input()
01722  *       is called directly.
01723  *    LWIP_NETIF_LOOPBACK_MULTITHREADING==0: Indicates a polling (or NO_SYS) setup.
01724  *       The packets are put on a list and netif_poll() must be called in
01725  *       the main application loop.
01726  */
01727 #if !defined LWIP_NETIF_LOOPBACK_MULTITHREADING || defined __DOXYGEN__
01728 #define LWIP_NETIF_LOOPBACK_MULTITHREADING    (!NO_SYS)
01729 #endif
01730 /**
01731  * @}
01732  */
01733 
01734 /*
01735    ------------------------------------
01736    ---------- Thread options ----------
01737    ------------------------------------
01738 */
01739 /**
01740  * @defgroup lwip_opts_thread Threading
01741  * @ingroup lwip_opts_infrastructure
01742  * @{
01743  */
01744 /**
01745  * TCPIP_THREAD_NAME: The name assigned to the main tcpip thread.
01746  */
01747 #if !defined TCPIP_THREAD_NAME || defined __DOXYGEN__
01748 #define TCPIP_THREAD_NAME              "lwip_tcpip"
01749 #endif
01750 
01751 /**
01752  * TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread.
01753  * The stack size value itself is platform-dependent, but is passed to
01754  * sys_thread_new() when the thread is created.
01755  */
01756 #if !defined TCPIP_THREAD_STACKSIZE || defined __DOXYGEN__
01757 #define TCPIP_THREAD_STACKSIZE          0
01758 #endif
01759 
01760 /**
01761  * TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread.
01762  * The priority value itself is platform-dependent, but is passed to
01763  * sys_thread_new() when the thread is created.
01764  */
01765 #if !defined TCPIP_THREAD_PRIO || defined __DOXYGEN__
01766 #define TCPIP_THREAD_PRIO               1
01767 #endif
01768 
01769 /**
01770  * TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages
01771  * The queue size value itself is platform-dependent, but is passed to
01772  * sys_mbox_new() when tcpip_init is called.
01773  */
01774 #if !defined TCPIP_MBOX_SIZE || defined __DOXYGEN__
01775 #define TCPIP_MBOX_SIZE                 0
01776 #endif
01777 
01778 /**
01779  * Define this to something that triggers a watchdog. This is called from
01780  * tcpip_thread after processing a message.
01781  */
01782 #if !defined LWIP_TCPIP_THREAD_ALIVE || defined __DOXYGEN__
01783 #define LWIP_TCPIP_THREAD_ALIVE()
01784 #endif
01785 
01786 /**
01787  * SLIPIF_THREAD_NAME: The name assigned to the slipif_loop thread.
01788  */
01789 #if !defined SLIPIF_THREAD_NAME || defined __DOXYGEN__
01790 #define SLIPIF_THREAD_NAME              "slipif_loop"
01791 #endif
01792 
01793 /**
01794  * SLIP_THREAD_STACKSIZE: The stack size used by the slipif_loop thread.
01795  * The stack size value itself is platform-dependent, but is passed to
01796  * sys_thread_new() when the thread is created.
01797  */
01798 #if !defined SLIPIF_THREAD_STACKSIZE || defined __DOXYGEN__
01799 #define SLIPIF_THREAD_STACKSIZE         0
01800 #endif
01801 
01802 /**
01803  * SLIPIF_THREAD_PRIO: The priority assigned to the slipif_loop thread.
01804  * The priority value itself is platform-dependent, but is passed to
01805  * sys_thread_new() when the thread is created.
01806  */
01807 #if !defined SLIPIF_THREAD_PRIO || defined __DOXYGEN__
01808 #define SLIPIF_THREAD_PRIO              1
01809 #endif
01810 
01811 /**
01812  * DEFAULT_THREAD_NAME: The name assigned to any other lwIP thread.
01813  */
01814 #if !defined DEFAULT_THREAD_NAME || defined __DOXYGEN__
01815 #define DEFAULT_THREAD_NAME             "lwIP"
01816 #endif
01817 
01818 /**
01819  * DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread.
01820  * The stack size value itself is platform-dependent, but is passed to
01821  * sys_thread_new() when the thread is created.
01822  */
01823 #if !defined DEFAULT_THREAD_STACKSIZE || defined __DOXYGEN__
01824 #define DEFAULT_THREAD_STACKSIZE        0
01825 #endif
01826 
01827 /**
01828  * DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread.
01829  * The priority value itself is platform-dependent, but is passed to
01830  * sys_thread_new() when the thread is created.
01831  */
01832 #if !defined DEFAULT_THREAD_PRIO || defined __DOXYGEN__
01833 #define DEFAULT_THREAD_PRIO             1
01834 #endif
01835 
01836 /**
01837  * DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
01838  * NETCONN_RAW. The queue size value itself is platform-dependent, but is passed
01839  * to sys_mbox_new() when the recvmbox is created.
01840  */
01841 #if !defined DEFAULT_RAW_RECVMBOX_SIZE || defined __DOXYGEN__
01842 #define DEFAULT_RAW_RECVMBOX_SIZE       0
01843 #endif
01844 
01845 /**
01846  * DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
01847  * NETCONN_UDP. The queue size value itself is platform-dependent, but is passed
01848  * to sys_mbox_new() when the recvmbox is created.
01849  */
01850 #if !defined DEFAULT_UDP_RECVMBOX_SIZE || defined __DOXYGEN__
01851 #define DEFAULT_UDP_RECVMBOX_SIZE       0
01852 #endif
01853 
01854 /**
01855  * DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
01856  * NETCONN_TCP. The queue size value itself is platform-dependent, but is passed
01857  * to sys_mbox_new() when the recvmbox is created.
01858  */
01859 #if !defined DEFAULT_TCP_RECVMBOX_SIZE || defined __DOXYGEN__
01860 #define DEFAULT_TCP_RECVMBOX_SIZE       0
01861 #endif
01862 
01863 /**
01864  * DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections.
01865  * The queue size value itself is platform-dependent, but is passed to
01866  * sys_mbox_new() when the acceptmbox is created.
01867  */
01868 #if !defined DEFAULT_ACCEPTMBOX_SIZE || defined __DOXYGEN__
01869 #define DEFAULT_ACCEPTMBOX_SIZE         0
01870 #endif
01871 /**
01872  * @}
01873  */
01874 
01875 /*
01876    ----------------------------------------------
01877    ---------- Sequential layer options ----------
01878    ----------------------------------------------
01879 */
01880 /**
01881  * @defgroup lwip_opts_netconn Netconn
01882  * @ingroup lwip_opts_threadsafe_apis
01883  * @{
01884  */
01885 /**
01886  * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
01887  */
01888 #if !defined LWIP_NETCONN || defined __DOXYGEN__
01889 #define LWIP_NETCONN                    1
01890 #endif
01891 
01892 /** LWIP_TCPIP_TIMEOUT==1: Enable tcpip_timeout/tcpip_untimeout to create
01893  * timers running in tcpip_thread from another thread.
01894  */
01895 #if !defined LWIP_TCPIP_TIMEOUT || defined __DOXYGEN__
01896 #define LWIP_TCPIP_TIMEOUT              0
01897 #endif
01898 
01899 /** LWIP_NETCONN_SEM_PER_THREAD==1: Use one (thread-local) semaphore per
01900  * thread calling socket/netconn functions instead of allocating one
01901  * semaphore per netconn (and per select etc.)
01902  * ATTENTION: a thread-local semaphore for API calls is needed:
01903  * - LWIP_NETCONN_THREAD_SEM_GET() returning a sys_sem_t*
01904  * - LWIP_NETCONN_THREAD_SEM_ALLOC() creating the semaphore
01905  * - LWIP_NETCONN_THREAD_SEM_FREE() freeing the semaphore
01906  * The latter 2 can be invoked up by calling netconn_thread_init()/netconn_thread_cleanup().
01907  * Ports may call these for threads created with sys_thread_new().
01908  */
01909 #if !defined LWIP_NETCONN_SEM_PER_THREAD || defined __DOXYGEN__
01910 #define LWIP_NETCONN_SEM_PER_THREAD     0
01911 #endif
01912 
01913 /** LWIP_NETCONN_FULLDUPLEX==1: Enable code that allows reading from one thread,
01914  * writing from a 2nd thread and closing from a 3rd thread at the same time.
01915  * ATTENTION: This is currently really alpha! Some requirements:
01916  * - LWIP_NETCONN_SEM_PER_THREAD==1 is required to use one socket/netconn from
01917  *   multiple threads at once
01918  * - sys_mbox_free() has to unblock receive tasks waiting on recvmbox/acceptmbox
01919  *   and prevent a task pending on this during/after deletion
01920  */
01921 #if !defined LWIP_NETCONN_FULLDUPLEX || defined __DOXYGEN__
01922 #define LWIP_NETCONN_FULLDUPLEX         0
01923 #endif
01924 /**
01925  * @}
01926  */
01927 
01928 /*
01929    ------------------------------------
01930    ---------- Socket options ----------
01931    ------------------------------------
01932 */
01933 /**
01934  * @defgroup lwip_opts_socket Sockets
01935  * @ingroup lwip_opts_threadsafe_apis
01936  * @{
01937  */
01938 /**
01939  * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
01940  */
01941 #if !defined LWIP_SOCKET || defined __DOXYGEN__
01942 #define LWIP_SOCKET                     1
01943 #endif
01944 
01945 /**
01946  * LWIP_COMPAT_SOCKETS==1: Enable BSD-style sockets functions names through defines.
01947  * LWIP_COMPAT_SOCKETS==2: Same as ==1 but correctly named functions are created.
01948  * While this helps code completion, it might conflict with existing libraries.
01949  * (only used if you use sockets.c)
01950  */
01951 #if !defined LWIP_COMPAT_SOCKETS || defined __DOXYGEN__
01952 #define LWIP_COMPAT_SOCKETS             1
01953 #endif
01954 
01955 /**
01956  * LWIP_POSIX_SOCKETS_IO_NAMES==1: Enable POSIX-style sockets functions names.
01957  * Disable this option if you use a POSIX operating system that uses the same
01958  * names (read, write & close). (only used if you use sockets.c)
01959  */
01960 #if !defined LWIP_POSIX_SOCKETS_IO_NAMES || defined __DOXYGEN__
01961 #define LWIP_POSIX_SOCKETS_IO_NAMES     1
01962 #endif
01963 
01964 /**
01965  * LWIP_SOCKET_OFFSET==n: Increases the file descriptor number created by LwIP with n.
01966  * This can be useful when there are multiple APIs which create file descriptors.
01967  * When they all start with a different offset and you won't make them overlap you can
01968  * re implement read/write/close/ioctl/fnctl to send the requested action to the right
01969  * library (sharing select will need more work though).
01970  */
01971 #if !defined LWIP_SOCKET_OFFSET || defined __DOXYGEN__
01972 #define LWIP_SOCKET_OFFSET              0
01973 #endif
01974 
01975 /**
01976  * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT
01977  * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set
01978  * in seconds. (does not require sockets.c, and will affect tcp.c)
01979  */
01980 #if !defined LWIP_TCP_KEEPALIVE || defined __DOXYGEN__
01981 #define LWIP_TCP_KEEPALIVE              0
01982 #endif
01983 
01984 /**
01985  * LWIP_SO_SNDTIMEO==1: Enable send timeout for sockets/netconns and
01986  * SO_SNDTIMEO processing.
01987  */
01988 #if !defined LWIP_SO_SNDTIMEO || defined __DOXYGEN__
01989 #define LWIP_SO_SNDTIMEO                0
01990 #endif
01991 
01992 /**
01993  * LWIP_SO_RCVTIMEO==1: Enable receive timeout for sockets/netconns and
01994  * SO_RCVTIMEO processing.
01995  */
01996 #if !defined LWIP_SO_RCVTIMEO || defined __DOXYGEN__
01997 #define LWIP_SO_RCVTIMEO                0
01998 #endif
01999 
02000 /**
02001  * LWIP_SO_SNDRCVTIMEO_NONSTANDARD==1: SO_RCVTIMEO/SO_SNDTIMEO take an int
02002  * (milliseconds, much like winsock does) instead of a struct timeval (default).
02003  */
02004 #if !defined LWIP_SO_SNDRCVTIMEO_NONSTANDARD || defined __DOXYGEN__
02005 #define LWIP_SO_SNDRCVTIMEO_NONSTANDARD 0
02006 #endif
02007 
02008 /**
02009  * LWIP_SO_RCVBUF==1: Enable SO_RCVBUF processing.
02010  */
02011 #if !defined LWIP_SO_RCVBUF || defined __DOXYGEN__
02012 #define LWIP_SO_RCVBUF                  0
02013 #endif
02014 
02015 /**
02016  * LWIP_SO_LINGER==1: Enable SO_LINGER processing.
02017  */
02018 #if !defined LWIP_SO_LINGER || defined __DOXYGEN__
02019 #define LWIP_SO_LINGER                  0
02020 #endif
02021 
02022 /**
02023  * If LWIP_SO_RCVBUF is used, this is the default value for recv_bufsize.
02024  */
02025 #if !defined RECV_BUFSIZE_DEFAULT || defined __DOXYGEN__
02026 #define RECV_BUFSIZE_DEFAULT            INT_MAX
02027 #endif
02028 
02029 /**
02030  * By default, TCP socket/netconn close waits 20 seconds max to send the FIN
02031  */
02032 #if !defined LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT || defined __DOXYGEN__
02033 #define LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT 20000
02034 #endif
02035 
02036 /**
02037  * SO_REUSE==1: Enable SO_REUSEADDR option.
02038  */
02039 #if !defined SO_REUSE || defined __DOXYGEN__
02040 #define SO_REUSE                        0
02041 #endif
02042 
02043 /**
02044  * SO_REUSE_RXTOALL==1: Pass a copy of incoming broadcast/multicast packets
02045  * to all local matches if SO_REUSEADDR is turned on.
02046  * WARNING: Adds a memcpy for every packet if passing to more than one pcb!
02047  */
02048 #if !defined SO_REUSE_RXTOALL || defined __DOXYGEN__
02049 #define SO_REUSE_RXTOALL                0
02050 #endif
02051 
02052 /**
02053  * LWIP_FIONREAD_LINUXMODE==0 (default): ioctl/FIONREAD returns the amount of
02054  * pending data in the network buffer. This is the way windows does it. It's
02055  * the default for lwIP since it is smaller.
02056  * LWIP_FIONREAD_LINUXMODE==1: ioctl/FIONREAD returns the size of the next
02057  * pending datagram in bytes. This is the way linux does it. This code is only
02058  * here for compatibility.
02059  */
02060 #if !defined LWIP_FIONREAD_LINUXMODE || defined __DOXYGEN__
02061 #define LWIP_FIONREAD_LINUXMODE         0
02062 #endif
02063 
02064 /**
02065  * LWIP_SOCKET_SELECT==1 (default): enable select() for sockets (uses a netconn
02066  * callback to keep track of events).
02067  * This saves RAM (counters per socket) and code (netconn event callback), which
02068  * should improve performance a bit).
02069  */
02070 #if !defined LWIP_SOCKET_SELECT || defined __DOXYGEN__
02071 #define LWIP_SOCKET_SELECT              1
02072 #endif
02073 
02074 /**
02075  * LWIP_SOCKET_POLL==1 (default): enable poll() for sockets (including
02076  * struct pollfd, nfds_t, and constants)
02077  */
02078 #if !defined LWIP_SOCKET_POLL || defined __DOXYGEN__
02079 #define LWIP_SOCKET_POLL                1
02080 #endif
02081 /**
02082  * @}
02083  */
02084 
02085 /*
02086    ----------------------------------------
02087    ---------- Statistics options ----------
02088    ----------------------------------------
02089 */
02090 /**
02091  * @defgroup lwip_opts_stats Statistics
02092  * @ingroup lwip_opts_debug
02093  * @{
02094  */
02095 /**
02096  * LWIP_STATS==1: Enable statistics collection in lwip_stats.
02097  */
02098 #if !defined LWIP_STATS || defined __DOXYGEN__
02099 #define LWIP_STATS                      1
02100 #endif
02101 
02102 #if LWIP_STATS
02103 
02104 /**
02105  * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions.
02106  */
02107 #if !defined LWIP_STATS_DISPLAY || defined __DOXYGEN__
02108 #define LWIP_STATS_DISPLAY              0
02109 #endif
02110 
02111 /**
02112  * LINK_STATS==1: Enable link stats.
02113  */
02114 #if !defined LINK_STATS || defined __DOXYGEN__
02115 #define LINK_STATS                      1
02116 #endif
02117 
02118 /**
02119  * ETHARP_STATS==1: Enable etharp stats.
02120  */
02121 #if !defined ETHARP_STATS || defined __DOXYGEN__
02122 #define ETHARP_STATS                    (LWIP_ARP)
02123 #endif
02124 
02125 /**
02126  * IP_STATS==1: Enable IP stats.
02127  */
02128 #if !defined IP_STATS || defined __DOXYGEN__
02129 #define IP_STATS                        1
02130 #endif
02131 
02132 /**
02133  * IPFRAG_STATS==1: Enable IP fragmentation stats. Default is
02134  * on if using either frag or reass.
02135  */
02136 #if !defined IPFRAG_STATS || defined __DOXYGEN__
02137 #define IPFRAG_STATS                    (IP_REASSEMBLY || IP_FRAG)
02138 #endif
02139 
02140 /**
02141  * ICMP_STATS==1: Enable ICMP stats.
02142  */
02143 #if !defined ICMP_STATS || defined __DOXYGEN__
02144 #define ICMP_STATS                      1
02145 #endif
02146 
02147 /**
02148  * IGMP_STATS==1: Enable IGMP stats.
02149  */
02150 #if !defined IGMP_STATS || defined __DOXYGEN__
02151 #define IGMP_STATS                      (LWIP_IGMP)
02152 #endif
02153 
02154 /**
02155  * UDP_STATS==1: Enable UDP stats. Default is on if
02156  * UDP enabled, otherwise off.
02157  */
02158 #if !defined UDP_STATS || defined __DOXYGEN__
02159 #define UDP_STATS                       (LWIP_UDP)
02160 #endif
02161 
02162 /**
02163  * TCP_STATS==1: Enable TCP stats. Default is on if TCP
02164  * enabled, otherwise off.
02165  */
02166 #if !defined TCP_STATS || defined __DOXYGEN__
02167 #define TCP_STATS                       (LWIP_TCP)
02168 #endif
02169 
02170 /**
02171  * MEM_STATS==1: Enable mem.c stats.
02172  */
02173 #if !defined MEM_STATS || defined __DOXYGEN__
02174 #define MEM_STATS                       ((MEM_LIBC_MALLOC == 0) && (MEM_USE_POOLS == 0))
02175 #endif
02176 
02177 /**
02178  * MEMP_STATS==1: Enable memp.c pool stats.
02179  */
02180 #if !defined MEMP_STATS || defined __DOXYGEN__
02181 #define MEMP_STATS                      (MEMP_MEM_MALLOC == 0)
02182 #endif
02183 
02184 /**
02185  * SYS_STATS==1: Enable system stats (sem and mbox counts, etc).
02186  */
02187 #if !defined SYS_STATS || defined __DOXYGEN__
02188 #define SYS_STATS                       (NO_SYS == 0)
02189 #endif
02190 
02191 /**
02192  * IP6_STATS==1: Enable IPv6 stats.
02193  */
02194 #if !defined IP6_STATS || defined __DOXYGEN__
02195 #define IP6_STATS                       (LWIP_IPV6)
02196 #endif
02197 
02198 /**
02199  * ICMP6_STATS==1: Enable ICMP for IPv6 stats.
02200  */
02201 #if !defined ICMP6_STATS || defined __DOXYGEN__
02202 #define ICMP6_STATS                     (LWIP_IPV6 && LWIP_ICMP6)
02203 #endif
02204 
02205 /**
02206  * IP6_FRAG_STATS==1: Enable IPv6 fragmentation stats.
02207  */
02208 #if !defined IP6_FRAG_STATS || defined __DOXYGEN__
02209 #define IP6_FRAG_STATS                  (LWIP_IPV6 && (LWIP_IPV6_FRAG || LWIP_IPV6_REASS))
02210 #endif
02211 
02212 /**
02213  * MLD6_STATS==1: Enable MLD for IPv6 stats.
02214  */
02215 #if !defined MLD6_STATS || defined __DOXYGEN__
02216 #define MLD6_STATS                      (LWIP_IPV6 && LWIP_IPV6_MLD)
02217 #endif
02218 
02219 /**
02220  * ND6_STATS==1: Enable Neighbor discovery for IPv6 stats.
02221  */
02222 #if !defined ND6_STATS || defined __DOXYGEN__
02223 #define ND6_STATS                       (LWIP_IPV6)
02224 #endif
02225 
02226 /**
02227  * MIB2_STATS==1: Stats for SNMP MIB2.
02228  */
02229 #if !defined MIB2_STATS || defined __DOXYGEN__
02230 #define MIB2_STATS                      0
02231 #endif
02232 
02233 #else
02234 
02235 #define LINK_STATS                      0
02236 #define ETHARP_STATS                    0
02237 #define IP_STATS                        0
02238 #define IPFRAG_STATS                    0
02239 #define ICMP_STATS                      0
02240 #define IGMP_STATS                      0
02241 #define UDP_STATS                       0
02242 #define TCP_STATS                       0
02243 #define MEM_STATS                       0
02244 #define MEMP_STATS                      0
02245 #define SYS_STATS                       0
02246 #define LWIP_STATS_DISPLAY              0
02247 #define IP6_STATS                       0
02248 #define ICMP6_STATS                     0
02249 #define IP6_FRAG_STATS                  0
02250 #define MLD6_STATS                      0
02251 #define ND6_STATS                       0
02252 #define MIB2_STATS                      0
02253 
02254 #endif /* LWIP_STATS */
02255 /**
02256  * @}
02257  */
02258 
02259 /*
02260    --------------------------------------
02261    ---------- Checksum options ----------
02262    --------------------------------------
02263 */
02264 /**
02265  * @defgroup lwip_opts_checksum Checksum
02266  * @ingroup lwip_opts_infrastructure
02267  * @{
02268  */
02269 /**
02270  * LWIP_CHECKSUM_CTRL_PER_NETIF==1: Checksum generation/check can be enabled/disabled
02271  * per netif.
02272  * ATTENTION: if enabled, the CHECKSUM_GEN_* and CHECKSUM_CHECK_* defines must be enabled!
02273  */
02274 #if !defined LWIP_CHECKSUM_CTRL_PER_NETIF || defined __DOXYGEN__
02275 #define LWIP_CHECKSUM_CTRL_PER_NETIF    0
02276 #endif
02277 
02278 /**
02279  * CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets.
02280  */
02281 #if !defined CHECKSUM_GEN_IP || defined __DOXYGEN__
02282 #define CHECKSUM_GEN_IP                 1
02283 #endif
02284 
02285 /**
02286  * CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets.
02287  */
02288 #if !defined CHECKSUM_GEN_UDP || defined __DOXYGEN__
02289 #define CHECKSUM_GEN_UDP                1
02290 #endif
02291 
02292 /**
02293  * CHECKSUM_GEN_TCP==1: Generate checksums in software for outgoing TCP packets.
02294  */
02295 #if !defined CHECKSUM_GEN_TCP || defined __DOXYGEN__
02296 #define CHECKSUM_GEN_TCP                1
02297 #endif
02298 
02299 /**
02300  * CHECKSUM_GEN_ICMP==1: Generate checksums in software for outgoing ICMP packets.
02301  */
02302 #if !defined CHECKSUM_GEN_ICMP || defined __DOXYGEN__
02303 #define CHECKSUM_GEN_ICMP               1
02304 #endif
02305 
02306 /**
02307  * CHECKSUM_GEN_ICMP6==1: Generate checksums in software for outgoing ICMP6 packets.
02308  */
02309 #if !defined CHECKSUM_GEN_ICMP6 || defined __DOXYGEN__
02310 #define CHECKSUM_GEN_ICMP6              1
02311 #endif
02312 
02313 /**
02314  * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.
02315  */
02316 #if !defined CHECKSUM_CHECK_IP || defined __DOXYGEN__
02317 #define CHECKSUM_CHECK_IP               1
02318 #endif
02319 
02320 /**
02321  * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.
02322  */
02323 #if !defined CHECKSUM_CHECK_UDP || defined __DOXYGEN__
02324 #define CHECKSUM_CHECK_UDP              1
02325 #endif
02326 
02327 /**
02328  * CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets.
02329  */
02330 #if !defined CHECKSUM_CHECK_TCP || defined __DOXYGEN__
02331 #define CHECKSUM_CHECK_TCP              1
02332 #endif
02333 
02334 /**
02335  * CHECKSUM_CHECK_ICMP==1: Check checksums in software for incoming ICMP packets.
02336  */
02337 #if !defined CHECKSUM_CHECK_ICMP || defined __DOXYGEN__
02338 #define CHECKSUM_CHECK_ICMP             1
02339 #endif
02340 
02341 /**
02342  * CHECKSUM_CHECK_ICMP6==1: Check checksums in software for incoming ICMPv6 packets
02343  */
02344 #if !defined CHECKSUM_CHECK_ICMP6 || defined __DOXYGEN__
02345 #define CHECKSUM_CHECK_ICMP6            1
02346 #endif
02347 
02348 /**
02349  * LWIP_CHECKSUM_ON_COPY==1: Calculate checksum when copying data from
02350  * application buffers to pbufs.
02351  */
02352 #if !defined LWIP_CHECKSUM_ON_COPY || defined __DOXYGEN__
02353 #define LWIP_CHECKSUM_ON_COPY           0
02354 #endif
02355 /**
02356  * @}
02357  */
02358 
02359 /*
02360    ---------------------------------------
02361    ---------- IPv6 options ---------------
02362    ---------------------------------------
02363 */
02364 /**
02365  * @defgroup lwip_opts_ipv6 IPv6
02366  * @ingroup lwip_opts
02367  * @{
02368  */
02369 /**
02370  * LWIP_IPV6==1: Enable IPv6
02371  */
02372 #if !defined LWIP_IPV6 || defined __DOXYGEN__
02373 #define LWIP_IPV6                       0
02374 #endif
02375 
02376 /**
02377  * IPV6_REASS_MAXAGE: Maximum time (in multiples of IP6_REASS_TMR_INTERVAL - so seconds, normally)
02378  * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
02379  * in this time, the whole packet is discarded.
02380  */
02381 #if !defined IPV6_REASS_MAXAGE || defined __DOXYGEN__
02382 #define IPV6_REASS_MAXAGE               60
02383 #endif
02384 
02385 /**
02386  * LWIP_IPV6_SCOPES==1: Enable support for IPv6 address scopes, ensuring that
02387  * e.g. link-local addresses are really treated as link-local. Disable this
02388  * setting only for single-interface configurations.
02389  * All addresses that have a scope according to the default policy (link-local
02390  * unicast addresses, interface-local and link-local multicast addresses) should
02391  * now have a zone set on them before being passed to the core API, although
02392  * lwIP will currently attempt to select a zone on the caller's behalf when 
02393  * necessary. Applications that directly assign IPv6 addresses to interfaces
02394  * (which is NOT recommended) must now ensure that link-local addresses carry
02395  * the netif's zone. See the new ip6_zone.h header file for more information and
02396  * relevant macros. For now it is still possible to turn off scopes support
02397  * through the new LWIP_IPV6_SCOPES option. When upgrading an implementation that
02398  * uses the core API directly, it is highly recommended to enable
02399  * LWIP_IPV6_SCOPES_DEBUG at least for a while, to ensure e.g. proper address
02400  * initialization.
02401  */
02402 #if !defined LWIP_IPV6_SCOPES || defined __DOXYGEN__
02403 #define LWIP_IPV6_SCOPES                0 /*(LWIP_IPV6 && !LWIP_SINGLE_NETIF)*/
02404 #endif
02405 
02406 /**
02407  * LWIP_IPV6_SCOPES_DEBUG==1: Perform run-time checks to verify that addresses
02408  * are properly zoned (see ip6_zone.h on what that means) where it matters.
02409  * Enabling this setting is highly recommended when upgrading from an existing
02410  * installation that is not yet scope-aware; otherwise it may be too expensive.
02411  */
02412 #if !defined LWIP_IPV6_SCOPES_DEBUG || defined __DOXYGEN__
02413 #define LWIP_IPV6_SCOPES_DEBUG          0
02414 #endif
02415 
02416 /**
02417  * LWIP_IPV6_NUM_ADDRESSES: Number of IPv6 addresses per netif.
02418  */
02419 #if !defined LWIP_IPV6_NUM_ADDRESSES || defined __DOXYGEN__
02420 #define LWIP_IPV6_NUM_ADDRESSES         3
02421 #endif
02422 
02423 /**
02424  * LWIP_IPV6_FORWARD==1: Forward IPv6 packets across netifs
02425  */
02426 #if !defined LWIP_IPV6_FORWARD || defined __DOXYGEN__
02427 #define LWIP_IPV6_FORWARD               0
02428 #endif
02429 
02430 /**
02431  * LWIP_IPV6_FRAG==1: Fragment outgoing IPv6 packets that are too big.
02432  */
02433 #if !defined LWIP_IPV6_FRAG || defined __DOXYGEN__
02434 #define LWIP_IPV6_FRAG                  1
02435 #endif
02436 
02437 /**
02438  * LWIP_IPV6_REASS==1: reassemble incoming IPv6 packets that fragmented
02439  */
02440 #if !defined LWIP_IPV6_REASS || defined __DOXYGEN__
02441 #define LWIP_IPV6_REASS                 LWIP_IPV6
02442 #endif
02443 
02444 /**
02445  * LWIP_IPV6_SEND_ROUTER_SOLICIT==1: Send router solicitation messages during
02446  * network startup.
02447  */
02448 #if !defined LWIP_IPV6_SEND_ROUTER_SOLICIT || defined __DOXYGEN__
02449 #define LWIP_IPV6_SEND_ROUTER_SOLICIT   1
02450 #endif
02451 
02452 /**
02453  * LWIP_IPV6_AUTOCONFIG==1: Enable stateless address autoconfiguration as per RFC 4862.
02454  */
02455 #if !defined LWIP_IPV6_AUTOCONFIG || defined __DOXYGEN__
02456 #define LWIP_IPV6_AUTOCONFIG            LWIP_IPV6
02457 #endif
02458 
02459 /**
02460  * LWIP_IPV6_ADDRESS_LIFETIMES==1: Keep valid and preferred lifetimes for each
02461  * IPv6 address. Required for LWIP_IPV6_AUTOCONFIG. May still be enabled
02462  * otherwise, in which case the application may assign address lifetimes with
02463  * the appropriate macros. Addresses with no lifetime are assumed to be static.
02464  * If this option is disabled, all addresses are assumed to be static.
02465  */
02466 #if !defined LWIP_IPV6_ADDRESS_LIFETIMES || defined __DOXYGEN__
02467 #define LWIP_IPV6_ADDRESS_LIFETIMES     LWIP_IPV6_AUTOCONFIG
02468 #endif
02469 
02470 /**
02471  * LWIP_IPV6_DUP_DETECT_ATTEMPTS=[0..7]: Number of duplicate address detection attempts.
02472  */
02473 #if !defined LWIP_IPV6_DUP_DETECT_ATTEMPTS || defined __DOXYGEN__
02474 #define LWIP_IPV6_DUP_DETECT_ATTEMPTS   1
02475 #endif
02476 /**
02477  * @}
02478  */
02479 
02480 /**
02481  * @defgroup lwip_opts_icmp6 ICMP6
02482  * @ingroup lwip_opts_ipv6
02483  * @{
02484  */
02485 /**
02486  * LWIP_ICMP6==1: Enable ICMPv6 (mandatory per RFC)
02487  */
02488 #if !defined LWIP_ICMP6 || defined __DOXYGEN__
02489 #define LWIP_ICMP6                      LWIP_IPV6
02490 #endif
02491 
02492 /**
02493  * LWIP_ICMP6_DATASIZE: bytes from original packet to send back in
02494  * ICMPv6 error messages.
02495  */
02496 #if !defined LWIP_ICMP6_DATASIZE || defined __DOXYGEN__
02497 #define LWIP_ICMP6_DATASIZE             8
02498 #endif
02499 
02500 /**
02501  * LWIP_ICMP6_HL: default hop limit for ICMPv6 messages
02502  */
02503 #if !defined LWIP_ICMP6_HL || defined __DOXYGEN__
02504 #define LWIP_ICMP6_HL                   255
02505 #endif
02506 /**
02507  * @}
02508  */
02509 
02510 /**
02511  * @defgroup lwip_opts_mld6 Multicast listener discovery
02512  * @ingroup lwip_opts_ipv6
02513  * @{
02514  */
02515 /**
02516  * LWIP_IPV6_MLD==1: Enable multicast listener discovery protocol.
02517  * If LWIP_IPV6 is enabled but this setting is disabled, the MAC layer must
02518  * indiscriminately pass all inbound IPv6 multicast traffic to lwIP.
02519  */
02520 #if !defined LWIP_IPV6_MLD || defined __DOXYGEN__
02521 #define LWIP_IPV6_MLD                   LWIP_IPV6
02522 #endif
02523 
02524 /**
02525  * MEMP_NUM_MLD6_GROUP: Max number of IPv6 multicast groups that can be joined.
02526  * There must be enough groups so that each netif can join the solicited-node
02527  * multicast group for each of its local addresses, plus one for MDNS if
02528  * applicable, plus any number of groups to be joined on UDP sockets.
02529  */
02530 #if !defined MEMP_NUM_MLD6_GROUP || defined __DOXYGEN__
02531 #define MEMP_NUM_MLD6_GROUP             4
02532 #endif
02533 /**
02534  * @}
02535  */
02536 
02537 /**
02538  * @defgroup lwip_opts_nd6 Neighbor discovery
02539  * @ingroup lwip_opts_ipv6
02540  * @{
02541  */
02542 /**
02543  * LWIP_ND6_QUEUEING==1: queue outgoing IPv6 packets while MAC address
02544  * is being resolved.
02545  */
02546 #if !defined LWIP_ND6_QUEUEING || defined __DOXYGEN__
02547 #define LWIP_ND6_QUEUEING               LWIP_IPV6
02548 #endif
02549 
02550 /**
02551  * MEMP_NUM_ND6_QUEUE: Max number of IPv6 packets to queue during MAC resolution.
02552  */
02553 #if !defined MEMP_NUM_ND6_QUEUE || defined __DOXYGEN__
02554 #define MEMP_NUM_ND6_QUEUE              20
02555 #endif
02556 
02557 /**
02558  * LWIP_ND6_NUM_NEIGHBORS: Number of entries in IPv6 neighbor cache
02559  */
02560 #if !defined LWIP_ND6_NUM_NEIGHBORS || defined __DOXYGEN__
02561 #define LWIP_ND6_NUM_NEIGHBORS          10
02562 #endif
02563 
02564 /**
02565  * LWIP_ND6_NUM_DESTINATIONS: number of entries in IPv6 destination cache
02566  */
02567 #if !defined LWIP_ND6_NUM_DESTINATIONS || defined __DOXYGEN__
02568 #define LWIP_ND6_NUM_DESTINATIONS       10
02569 #endif
02570 
02571 /**
02572  * LWIP_ND6_NUM_PREFIXES: number of entries in IPv6 on-link prefixes cache
02573  */
02574 #if !defined LWIP_ND6_NUM_PREFIXES || defined __DOXYGEN__
02575 #define LWIP_ND6_NUM_PREFIXES           5
02576 #endif
02577 
02578 /**
02579  * LWIP_ND6_NUM_ROUTERS: number of entries in IPv6 default router cache
02580  */
02581 #if !defined LWIP_ND6_NUM_ROUTERS || defined __DOXYGEN__
02582 #define LWIP_ND6_NUM_ROUTERS            3
02583 #endif
02584 
02585 /**
02586  * LWIP_ND6_MAX_MULTICAST_SOLICIT: max number of multicast solicit messages to send
02587  * (neighbor solicit and router solicit)
02588  */
02589 #if !defined LWIP_ND6_MAX_MULTICAST_SOLICIT || defined __DOXYGEN__
02590 #define LWIP_ND6_MAX_MULTICAST_SOLICIT  3
02591 #endif
02592 
02593 /**
02594  * LWIP_ND6_MAX_UNICAST_SOLICIT: max number of unicast neighbor solicitation messages
02595  * to send during neighbor reachability detection.
02596  */
02597 #if !defined LWIP_ND6_MAX_UNICAST_SOLICIT || defined __DOXYGEN__
02598 #define LWIP_ND6_MAX_UNICAST_SOLICIT    3
02599 #endif
02600 
02601 /**
02602  * Unused: See ND RFC (time in milliseconds).
02603  */
02604 #if !defined LWIP_ND6_MAX_ANYCAST_DELAY_TIME || defined __DOXYGEN__
02605 #define LWIP_ND6_MAX_ANYCAST_DELAY_TIME 1000
02606 #endif
02607 
02608 /**
02609  * Unused: See ND RFC
02610  */
02611 #if !defined LWIP_ND6_MAX_NEIGHBOR_ADVERTISEMENT || defined __DOXYGEN__
02612 #define LWIP_ND6_MAX_NEIGHBOR_ADVERTISEMENT  3
02613 #endif
02614 
02615 /**
02616  * LWIP_ND6_REACHABLE_TIME: default neighbor reachable time (in milliseconds).
02617  * May be updated by router advertisement messages.
02618  */
02619 #if !defined LWIP_ND6_REACHABLE_TIME || defined __DOXYGEN__
02620 #define LWIP_ND6_REACHABLE_TIME         30000
02621 #endif
02622 
02623 /**
02624  * LWIP_ND6_RETRANS_TIMER: default retransmission timer for solicitation messages
02625  */
02626 #if !defined LWIP_ND6_RETRANS_TIMER || defined __DOXYGEN__
02627 #define LWIP_ND6_RETRANS_TIMER          1000
02628 #endif
02629 
02630 /**
02631  * LWIP_ND6_DELAY_FIRST_PROBE_TIME: Delay before first unicast neighbor solicitation
02632  * message is sent, during neighbor reachability detection.
02633  */
02634 #if !defined LWIP_ND6_DELAY_FIRST_PROBE_TIME || defined __DOXYGEN__
02635 #define LWIP_ND6_DELAY_FIRST_PROBE_TIME 5000
02636 #endif
02637 
02638 /**
02639  * LWIP_ND6_ALLOW_RA_UPDATES==1: Allow Router Advertisement messages to update
02640  * Reachable time and retransmission timers, and netif MTU.
02641  */
02642 #if !defined LWIP_ND6_ALLOW_RA_UPDATES || defined __DOXYGEN__
02643 #define LWIP_ND6_ALLOW_RA_UPDATES       1
02644 #endif
02645 
02646 /**
02647  * LWIP_ND6_TCP_REACHABILITY_HINTS==1: Allow TCP to provide Neighbor Discovery
02648  * with reachability hints for connected destinations. This helps avoid sending
02649  * unicast neighbor solicitation messages.
02650  */
02651 #if !defined LWIP_ND6_TCP_REACHABILITY_HINTS || defined __DOXYGEN__
02652 #define LWIP_ND6_TCP_REACHABILITY_HINTS 1
02653 #endif
02654 
02655 /**
02656  * LWIP_ND6_RDNSS_MAX_DNS_SERVERS > 0: Use IPv6 Router Advertisement Recursive
02657  * DNS Server Option (as per RFC 6106) to copy a defined maximum number of DNS
02658  * servers to the DNS module.
02659  */
02660 #if !defined LWIP_ND6_RDNSS_MAX_DNS_SERVERS || defined __DOXYGEN__
02661 #define LWIP_ND6_RDNSS_MAX_DNS_SERVERS  0
02662 #endif
02663 /**
02664  * @}
02665  */
02666 
02667 /**
02668  * @defgroup lwip_opts_dhcpv6 DHCPv6
02669  * @ingroup lwip_opts_ipv6
02670  * @{
02671  */
02672 /**
02673  * LWIP_IPV6_DHCP6==1: enable DHCPv6 stateful/stateless address autoconfiguration.
02674  */
02675 #if !defined LWIP_IPV6_DHCP6 || defined __DOXYGEN__
02676 #define LWIP_IPV6_DHCP6                 0
02677 #endif
02678 
02679 /**
02680  * LWIP_IPV6_DHCP6_STATEFUL==1: enable DHCPv6 stateful address autoconfiguration.
02681  * (not supported, yet!)
02682  */
02683 #if !defined LWIP_IPV6_DHCP6_STATEFUL || defined __DOXYGEN__
02684 #define LWIP_IPV6_DHCP6_STATEFUL        0
02685 #endif
02686 
02687 /**
02688  * LWIP_IPV6_DHCP6_STATELESS==1: enable DHCPv6 stateless address autoconfiguration.
02689  */
02690 #if !defined LWIP_IPV6_DHCP6_STATELESS || defined __DOXYGEN__
02691 #define LWIP_IPV6_DHCP6_STATELESS       LWIP_IPV6_DHCP6
02692 #endif
02693 
02694 /**
02695  * LWIP_DHCP6_GETS_NTP==1: Request NTP servers via DHCPv6. For each
02696  * response packet, a callback is called, which has to be provided by the port:
02697  * void dhcp6_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs);
02698 */
02699 #if !defined LWIP_DHCP6_GET_NTP_SRV || defined __DOXYGEN__
02700 #define LWIP_DHCP6_GET_NTP_SRV          0
02701 #endif
02702 
02703 /**
02704  * The maximum of NTP servers requested
02705  */
02706 #if !defined LWIP_DHCP6_MAX_NTP_SERVERS || defined __DOXYGEN__
02707 #define LWIP_DHCP6_MAX_NTP_SERVERS      1
02708 #endif
02709 
02710 /**
02711  * LWIP_DHCP6_MAX_DNS_SERVERS > 0: Request DNS servers via DHCPv6.
02712  * DNS servers received in the response are passed to DNS via @ref dns_setserver()
02713  * (up to the maximum limit defined here).
02714  */
02715 #if !defined LWIP_DHCP6_MAX_DNS_SERVERS || defined __DOXYGEN__
02716 #define LWIP_DHCP6_MAX_DNS_SERVERS      DNS_MAX_SERVERS
02717 #endif
02718 /**
02719  * @}
02720  */
02721 
02722 /*
02723    ---------------------------------------
02724    ---------- Hook options ---------------
02725    ---------------------------------------
02726 */
02727 
02728 /**
02729  * @defgroup lwip_opts_hooks Hooks
02730  * @ingroup lwip_opts_infrastructure
02731  * Hooks are undefined by default, define them to a function if you need them.
02732  * @{
02733  */
02734 
02735 /**
02736  * LWIP_HOOK_FILENAME: Custom filename to \#include in files that provide hooks.
02737  * Declare your hook function prototypes in there, you may also \#include all headers
02738  * providing data types that are need in this file.
02739  */
02740 #ifdef __DOXYGEN__
02741 #define LWIP_HOOK_FILENAME "path/to/my/lwip_hooks.h"
02742 #endif
02743 
02744 /**
02745  * LWIP_HOOK_TCP_ISN:
02746  * Hook for generation of the Initial Sequence Number (ISN) for a new TCP
02747  * connection. The default lwIP ISN generation algorithm is very basic and may
02748  * allow for TCP spoofing attacks. This hook provides the means to implement
02749  * the standardized ISN generation algorithm from RFC 6528 (see contrib/adons/tcp_isn),
02750  * or any other desired algorithm as a replacement.
02751  * Called from tcp_connect() and tcp_listen_input() when an ISN is needed for
02752  * a new TCP connection, if TCP support (@ref LWIP_TCP) is enabled.\n
02753  * Signature:\code{.c}
02754  * u32_t my_hook_tcp_isn(const ip_addr_t* local_ip, u16_t local_port, const ip_addr_t* remote_ip, u16_t remote_port);
02755  * \endcode
02756  * - it may be necessary to use "struct ip_addr" (ip4_addr, ip6_addr) instead of "ip_addr_t" in function declarations\n
02757  * Arguments:
02758  * - local_ip: pointer to the local IP address of the connection
02759  * - local_port: local port number of the connection (host-byte order)
02760  * - remote_ip: pointer to the remote IP address of the connection
02761  * - remote_port: remote port number of the connection (host-byte order)\n
02762  * Return value:
02763  * - the 32-bit Initial Sequence Number to use for the new TCP connection.
02764  */
02765 #ifdef __DOXYGEN__
02766 #define LWIP_HOOK_TCP_ISN(local_ip, local_port, remote_ip, remote_port)
02767 #endif
02768 
02769 /**
02770  * LWIP_HOOK_TCP_INPACKET_PCB:
02771  * Hook for intercepting incoming packets before they are passed to a pcb. This
02772  * allows updating some state or even dropping a packet.
02773  * Signature:\code{.c}
02774  * err_t my_hook_tcp_inpkt(struct tcp_pcb *pcb, struct tcp_hdr *hdr, u16_t optlen, u16_t opt1len, u8_t *opt2, struct pbuf *p);
02775  * \endcode
02776  * Arguments:
02777  * - pcb: tcp_pcb selected for input of this packet (ATTENTION: this may be
02778  *        struct tcp_pcb_listen if pcb->state == LISTEN)
02779  * - hdr: pointer to tcp header (ATTENTION: tcp options may not be in one piece!)
02780  * - optlen: tcp option length
02781  * - opt1len: tcp option length 1st part
02782  * - opt2: if this is != NULL, tcp options are split among 2 pbufs. In that case,
02783  *         options start at right after the tcp header ('(u8_t*)(hdr + 1)') for
02784  *         the first 'opt1len' bytes and the rest starts at 'opt2'. opt2len can
02785  *         be simply calculated: 'opt2len = optlen - opt1len;'
02786  * - p: input packet, p->payload points to application data (that's why tcp hdr
02787  *      and options are passed in seperately)
02788  * Return value:
02789  * - ERR_OK: continue input of this packet as normal
02790  * - != ERR_OK: drop this packet for input (don't continue input processing)
02791  *
02792  * ATTENTION: don't call any tcp api functions that might change tcp state (pcb
02793  * state or any pcb lists) from this callback!
02794  */
02795 #ifdef __DOXYGEN__
02796 #define LWIP_HOOK_TCP_INPACKET_PCB(pcb, hdr, optlen, opt1len, opt2, p)
02797 #endif
02798 
02799 /**
02800  * LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH:
02801  * Hook for increasing the size of the options allocated with a tcp header.
02802  * Together with LWIP_HOOK_TCP_OUT_ADD_TCPOPTS, this can be used to add custom
02803  * options to outgoing tcp segments.
02804  * Signature:\code{.c}
02805  * u8_t my_hook_tcp_out_tcpopt_length(const struct tcp_pcb *pcb, u8_t internal_option_length);
02806  * \endcode
02807  * Arguments:
02808  * - pcb: tcp_pcb that transmits (ATTENTION: this may be NULL or
02809  *        struct tcp_pcb_listen if pcb->state == LISTEN)
02810  * - internal_option_length: tcp option length used by the stack internally
02811  * Return value:
02812  * - a number of bytes to allocate for tcp options (internal_option_length <= ret <= 40)
02813  *
02814  * ATTENTION: don't call any tcp api functions that might change tcp state (pcb
02815  * state or any pcb lists) from this callback!
02816  */
02817 #ifdef __DOXYGEN__
02818 #define LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH(pcb, internal_len)
02819 #endif
02820 
02821 /**
02822  * LWIP_HOOK_TCP_OUT_ADD_TCPOPTS:
02823  * Hook for adding custom options to outgoing tcp segments.
02824  * Space for these custom options has to be reserved via LWIP_HOOK_TCP_OUT_TCPOPT_LENGTH.
02825  * Signature:\code{.c}
02826  * u32_t *my_hook_tcp_out_add_tcpopts(struct pbuf *p, struct tcp_hdr *hdr, const struct tcp_pcb *pcb, u32_t *opts);
02827  * \endcode
02828  * Arguments:
02829  * - p: output packet, p->payload pointing to tcp header, data follows
02830  * - hdr: tcp header
02831  * - pcb: tcp_pcb that transmits (ATTENTION: this may be NULL or
02832  *        struct tcp_pcb_listen if pcb->state == LISTEN)
02833  * - opts: pointer where to add the custom options (there may already be options
02834  *         between the header and these)
02835  * Return value:
02836  * - pointer pointing directly after the inserted options
02837  *
02838  * ATTENTION: don't call any tcp api functions that might change tcp state (pcb
02839  * state or any pcb lists) from this callback!
02840  */
02841 #ifdef __DOXYGEN__
02842 #define LWIP_HOOK_TCP_OUT_ADD_TCPOPTS(p, hdr, pcb, opts)
02843 #endif
02844 
02845 /**
02846  * LWIP_HOOK_IP4_INPUT(pbuf, input_netif):
02847  * Called from ip_input() (IPv4)
02848  * Signature:\code{.c}
02849  *   int my_hook(struct pbuf *pbuf, struct netif *input_netif);
02850  * \endcode
02851  * Arguments:
02852  * - pbuf: received struct pbuf passed to ip_input()
02853  * - input_netif: struct netif on which the packet has been received
02854  * Return values:
02855  * - 0: Hook has not consumed the packet, packet is processed as normal
02856  * - != 0: Hook has consumed the packet.
02857  * If the hook consumed the packet, 'pbuf' is in the responsibility of the hook
02858  * (i.e. free it when done).
02859  */
02860 #ifdef __DOXYGEN__
02861 #define LWIP_HOOK_IP4_INPUT(pbuf, input_netif)
02862 #endif
02863 
02864 /**
02865  * LWIP_HOOK_IP4_ROUTE(dest):
02866  * Called from ip_route() (IPv4)
02867  * Signature:\code{.c}
02868  *   struct netif *my_hook(const ip4_addr_t *dest);
02869  * \endcode
02870  * Arguments:
02871  * - dest: destination IPv4 address
02872  * Returns values:
02873  * - the destination netif
02874  * - NULL if no destination netif is found. In that case, ip_route() continues as normal.
02875  */
02876 #ifdef __DOXYGEN__
02877 #define LWIP_HOOK_IP4_ROUTE()
02878 #endif
02879 
02880 /**
02881  * LWIP_HOOK_IP4_ROUTE_SRC(src, dest):
02882  * Source-based routing for IPv4 - called from ip_route() (IPv4)
02883  * Signature:\code{.c}
02884  *   struct netif *my_hook(const ip4_addr_t *src, const ip4_addr_t *dest);
02885  * \endcode
02886  * Arguments:
02887  * - src: local/source IPv4 address
02888  * - dest: destination IPv4 address
02889  * Returns values:
02890  * - the destination netif
02891  * - NULL if no destination netif is found. In that case, ip_route() continues as normal.
02892  */
02893 #ifdef __DOXYGEN__
02894 #define LWIP_HOOK_IP4_ROUTE_SRC(src, dest)
02895 #endif
02896 
02897 /**
02898  * LWIP_HOOK_IP4_CANFORWARD(src, dest):
02899  * Check if an IPv4 can be forwarded - called from:
02900  * ip4_input() -> ip4_forward() -> ip4_canforward() (IPv4)
02901  * - source address is available via ip4_current_src_addr()
02902  * - calling an output function in this context (e.g. multicast router) is allowed
02903  * Signature:\code{.c}
02904  *   int my_hook(struct pbuf *p, u32_t dest_addr_hostorder);
02905  * \endcode
02906  * Arguments:
02907  * - p: packet to forward
02908  * - dest: destination IPv4 address
02909  * Returns values:
02910  * - 1: forward
02911  * - 0: don't forward
02912  * - -1: no decision. In that case, ip4_canforward() continues as normal.
02913  */
02914 #ifdef __DOXYGEN__
02915 #define LWIP_HOOK_IP4_CANFORWARD(src, dest)
02916 #endif
02917 
02918 /**
02919  * LWIP_HOOK_ETHARP_GET_GW(netif, dest):
02920  * Called from etharp_output() (IPv4)
02921  * Signature:\code{.c}
02922  *   const ip4_addr_t *my_hook(struct netif *netif, const ip4_addr_t *dest);
02923  * \endcode
02924  * Arguments:
02925  * - netif: the netif used for sending
02926  * - dest: the destination IPv4 address
02927  * Return values:
02928  * - the IPv4 address of the gateway to handle the specified destination IPv4 address
02929  * - NULL, in which case the netif's default gateway is used
02930  *
02931  * The returned address MUST be directly reachable on the specified netif!
02932  * This function is meant to implement advanced IPv4 routing together with
02933  * LWIP_HOOK_IP4_ROUTE(). The actual routing/gateway table implementation is
02934  * not part of lwIP but can e.g. be hidden in the netif's state argument.
02935 */
02936 #ifdef __DOXYGEN__
02937 #define LWIP_HOOK_ETHARP_GET_GW(netif, dest)
02938 #endif
02939 
02940 /**
02941  * LWIP_HOOK_IP6_INPUT(pbuf, input_netif):
02942  * Called from ip6_input() (IPv6)
02943  * Signature:\code{.c}
02944  *   int my_hook(struct pbuf *pbuf, struct netif *input_netif);
02945  * \endcode
02946  * Arguments:
02947  * - pbuf: received struct pbuf passed to ip6_input()
02948  * - input_netif: struct netif on which the packet has been received
02949  * Return values:
02950  * - 0: Hook has not consumed the packet, packet is processed as normal
02951  * - != 0: Hook has consumed the packet.
02952  * If the hook consumed the packet, 'pbuf' is in the responsibility of the hook
02953  * (i.e. free it when done).
02954  */
02955 #ifdef __DOXYGEN__
02956 #define LWIP_HOOK_IP6_INPUT(pbuf, input_netif)
02957 #endif
02958 
02959 /**
02960  * LWIP_HOOK_IP6_ROUTE(src, dest):
02961  * Called from ip_route() (IPv6)
02962  * Signature:\code{.c}
02963  *   struct netif *my_hook(const ip6_addr_t *dest, const ip6_addr_t *src);
02964  * \endcode
02965  * Arguments:
02966  * - src: source IPv6 address
02967  * - dest: destination IPv6 address
02968  * Return values:
02969  * - the destination netif
02970  * - NULL if no destination netif is found. In that case, ip6_route() continues as normal.
02971  */
02972 #ifdef __DOXYGEN__
02973 #define LWIP_HOOK_IP6_ROUTE(src, dest)
02974 #endif
02975 
02976 /**
02977  * LWIP_HOOK_ND6_GET_GW(netif, dest):
02978  * Called from nd6_get_next_hop_entry() (IPv6)
02979  * Signature:\code{.c}
02980  *   const ip6_addr_t *my_hook(struct netif *netif, const ip6_addr_t *dest);
02981  * \endcode
02982  * Arguments:
02983  * - netif: the netif used for sending
02984  * - dest: the destination IPv6 address
02985  * Return values:
02986  * - the IPv6 address of the next hop to handle the specified destination IPv6 address
02987  * - NULL, in which case a NDP-discovered router is used instead
02988  *
02989  * The returned address MUST be directly reachable on the specified netif!
02990  * This function is meant to implement advanced IPv6 routing together with
02991  * LWIP_HOOK_IP6_ROUTE(). The actual routing/gateway table implementation is
02992  * not part of lwIP but can e.g. be hidden in the netif's state argument.
02993 */
02994 #ifdef __DOXYGEN__
02995 #define LWIP_HOOK_ND6_GET_GW(netif, dest)
02996 #endif
02997 
02998 /**
02999  * LWIP_HOOK_VLAN_CHECK(netif, eth_hdr, vlan_hdr):
03000  * Called from ethernet_input() if VLAN support is enabled
03001  * Signature:\code{.c}
03002  *   int my_hook(struct netif *netif, struct eth_hdr *eth_hdr, struct eth_vlan_hdr *vlan_hdr);
03003  * \endcode
03004  * Arguments:
03005  * - netif: struct netif on which the packet has been received
03006  * - eth_hdr: struct eth_hdr of the packet
03007  * - vlan_hdr: struct eth_vlan_hdr of the packet
03008  * Return values:
03009  * - 0: Packet must be dropped.
03010  * - != 0: Packet must be accepted.
03011  */
03012 #ifdef __DOXYGEN__
03013 #define LWIP_HOOK_VLAN_CHECK(netif, eth_hdr, vlan_hdr)
03014 #endif
03015 
03016 /**
03017  * LWIP_HOOK_VLAN_SET:
03018  * Hook can be used to set prio_vid field of vlan_hdr. If you need to store data
03019  * on per-netif basis to implement this callback, see @ref netif_cd.
03020  * Called from ethernet_output() if VLAN support (@ref ETHARP_SUPPORT_VLAN) is enabled.\n
03021  * Signature:\code{.c}
03022  *   s32_t my_hook_vlan_set(struct netif* netif, struct pbuf* pbuf, const struct eth_addr* src, const struct eth_addr* dst, u16_t eth_type);\n
03023  * \endcode
03024  * Arguments:
03025  * - netif: struct netif that the packet will be sent through
03026  * - p: struct pbuf packet to be sent
03027  * - src: source eth address
03028  * - dst: destination eth address
03029  * - eth_type: ethernet type to packet to be sent\n
03030  * 
03031  * 
03032  * Return values:
03033  * - &lt;0: Packet shall not contain VLAN header.
03034  * - 0 &lt;= return value &lt;= 0xFFFF: Packet shall contain VLAN header. Return value is prio_vid in host byte order.
03035  */
03036 #ifdef __DOXYGEN__
03037 #define LWIP_HOOK_VLAN_SET(netif, p, src, dst, eth_type)
03038 #endif
03039 
03040 /**
03041  * LWIP_HOOK_MEMP_AVAILABLE(memp_t_type):
03042  * Called from memp_free() when a memp pool was empty and an item is now available
03043  * Signature:\code{.c}
03044  *   void my_hook(memp_t type);
03045  * \endcode
03046  */
03047 #ifdef __DOXYGEN__
03048 #define LWIP_HOOK_MEMP_AVAILABLE(memp_t_type)
03049 #endif
03050 
03051 /**
03052  * LWIP_HOOK_UNKNOWN_ETH_PROTOCOL(pbuf, netif):
03053  * Called from ethernet_input() when an unknown eth type is encountered.
03054  * Signature:\code{.c}
03055  *   err_t my_hook(struct pbuf* pbuf, struct netif* netif);
03056  * \endcode
03057  * Arguments:
03058  * - p: rx packet with unknown eth type
03059  * - netif: netif on which the packet has been received
03060  * Return values:
03061  * - ERR_OK if packet is accepted (hook function now owns the pbuf)
03062  * - any error code otherwise (pbuf is freed)
03063  *
03064  * Payload points to ethernet header!
03065  */
03066 #ifdef __DOXYGEN__
03067 #define LWIP_HOOK_UNKNOWN_ETH_PROTOCOL(pbuf, netif)
03068 #endif
03069 
03070 /**
03071  * LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, state, msg, msg_type, options_len_ptr):
03072  * Called from various dhcp functions when sending a DHCP message.
03073  * This hook is called just before the DHCP message trailer is added, so the
03074  * options are at the end of a DHCP message.
03075  * Signature:\code{.c}
03076  *   void my_hook(struct netif *netif, struct dhcp *dhcp, u8_t state, struct dhcp_msg *msg,
03077  *                u8_t msg_type, u16_t *options_len_ptr);
03078  * \endcode
03079  * Arguments:
03080  * - netif: struct netif that the packet will be sent through
03081  * - dhcp: struct dhcp on that netif
03082  * - state: current dhcp state (dhcp_state_enum_t as an u8_t)
03083  * - msg: struct dhcp_msg that will be sent
03084  * - msg_type: dhcp message type to be sent (u8_t)
03085  * - options_len_ptr: pointer to the current length of options in the dhcp_msg "msg"
03086  *                    (must be increased when options are added!)
03087  *
03088  * Options need to appended like this:
03089  *   LWIP_ASSERT("dhcp option overflow", *options_len_ptr + option_len + 2 <= DHCP_OPTIONS_LEN);
03090  *   msg->options[(*options_len_ptr)++] = &lt;option_number&gt;;
03091  *   msg->options[(*options_len_ptr)++] = &lt;option_len&gt;;
03092  *   msg->options[(*options_len_ptr)++] = &lt;option_bytes&gt;;
03093  *   [...]
03094  */
03095 #ifdef __DOXYGEN__
03096 #define LWIP_HOOK_DHCP_APPEND_OPTIONS(netif, dhcp, state, msg, msg_type, options_len_ptr)
03097 #endif
03098 
03099 /**
03100  * LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, option_value_offset):
03101  * Called from dhcp_parse_reply when receiving a DHCP message.
03102  * This hook is called for every option in the received message that is not handled internally.
03103  * Signature:\code{.c}
03104  *   void my_hook(struct netif *netif, struct dhcp *dhcp, u8_t state, struct dhcp_msg *msg,
03105  *                u8_t msg_type, u8_t option, u8_t option_len, struct pbuf *pbuf, u16_t option_value_offset);
03106  * \endcode
03107  * Arguments:
03108  * - netif: struct netif that the packet will be sent through
03109  * - dhcp: struct dhcp on that netif
03110  * - state: current dhcp state (dhcp_state_enum_t as an u8_t)
03111  * - msg: struct dhcp_msg that was received
03112  * - msg_type: dhcp message type received (u8_t, ATTENTION: only valid after
03113  *             the message type option has been parsed!)
03114  * - option: option value (u8_t)
03115  * - len: option data length (u8_t)
03116  * - pbuf: pbuf where option data is contained
03117  * - option_value_offset: offset in pbuf where option data begins
03118  *
03119  * A nice way to get the option contents is pbuf_get_contiguous():
03120  *  u8_t buf[32];
03121  *  u8_t *ptr = (u8_t*)pbuf_get_contiguous(p, buf, sizeof(buf), LWIP_MIN(option_len, sizeof(buf)), offset);
03122  */
03123 #ifdef __DOXYGEN__
03124 #define LWIP_HOOK_DHCP_PARSE_OPTION(netif, dhcp, state, msg, msg_type, option, len, pbuf, offset)
03125 #endif
03126 
03127 /**
03128  * LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len):
03129  * Called from various dhcp6 functions when sending a DHCP6 message.
03130  * This hook is called just before the DHCP6 message is sent, so the
03131  * options are at the end of a DHCP6 message.
03132  * Signature:\code{.c}
03133  *   void my_hook(struct netif *netif, struct dhcp6 *dhcp, u8_t state, struct dhcp6_msg *msg,
03134  *                u8_t msg_type, u16_t *options_len_ptr);
03135  * \endcode
03136  * Arguments:
03137  * - netif: struct netif that the packet will be sent through
03138  * - dhcp6: struct dhcp6 on that netif
03139  * - state: current dhcp6 state (dhcp6_state_enum_t as an u8_t)
03140  * - msg: struct dhcp6_msg that will be sent
03141  * - msg_type: dhcp6 message type to be sent (u8_t)
03142  * - options_len_ptr: pointer to the current length of options in the dhcp6_msg "msg"
03143  *                    (must be increased when options are added!)
03144  *
03145  * Options need to appended like this:
03146  *   u8_t *options = (u8_t *)(msg + 1);
03147  *   LWIP_ASSERT("dhcp option overflow", sizeof(struct dhcp6_msg) + *options_len_ptr + newoptlen <= max_len);
03148  *   options[(*options_len_ptr)++] = &lt;option_data&gt;;
03149  *   [...]
03150  */
03151 #ifdef __DOXYGEN__
03152 #define LWIP_HOOK_DHCP6_APPEND_OPTIONS(netif, dhcp6, state, msg, msg_type, options_len_ptr, max_len)
03153 #endif
03154 
03155 /**
03156  * LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err)
03157  * Called from socket API to implement setsockopt() for options not provided by lwIP.
03158  * Core lock is held when this hook is called.
03159  * Signature:\code{.c}
03160  *   int my_hook(int s, struct lwip_sock *sock, int level, int optname, const void *optval, socklen_t optlen, int *err)
03161  * \endcode
03162  * Arguments:
03163  * - s: socket file descriptor
03164  * - sock: internal socket descriptor (see lwip/priv/sockets_priv.h)
03165  * - level: protocol level at which the option resides
03166  * - optname: option to set
03167  * - optval: value to set
03168  * - optlen: size of optval
03169  * - err: output error
03170  * Return values:
03171  * - 0: Hook has not consumed the option, code continues as normal (to internal options)
03172  * - != 0: Hook has consumed the option, 'err' is returned
03173  */
03174 #ifdef __DOXYGEN__
03175 #define LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err)
03176 #endif
03177 
03178 /**
03179  * LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err)
03180  * Called from socket API to implement getsockopt() for options not provided by lwIP.
03181  * Core lock is held when this hook is called.
03182  * Signature:\code{.c}
03183  *   int my_hook(int s, struct lwip_sock *sock, int level, int optname, void *optval, socklen_t *optlen, int *err)
03184  * \endcode
03185  * Arguments:
03186  * - s: socket file descriptor
03187  * - sock: internal socket descriptor (see lwip/priv/sockets_priv.h)
03188  * - level: protocol level at which the option resides
03189  * - optname: option to get
03190  * - optval: value to get
03191  * - optlen: size of optval
03192  * - err: output error
03193  * Return values:
03194  * - 0: Hook has not consumed the option, code continues as normal (to internal options)
03195  * - != 0: Hook has consumed the option, 'err' is returned
03196  */
03197 #ifdef __DOXYGEN__
03198 #define LWIP_HOOK_SOCKETS_GETSOCKOPT(s, sock, level, optname, optval, optlen, err)
03199 #endif
03200 
03201 /**
03202  * LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, addrtype, err)
03203  * Called from netconn APIs (not usable with callback apps) allowing an
03204  * external DNS resolver (which uses sequential API) to handle the query.
03205  * Signature:\code{.c}
03206  *   int my_hook(const char *name, ip_addr_t *addr, u8_t addrtype, err_t *err)
03207  * \endcode
03208  * Arguments:
03209  * - name: hostname to resolve
03210  * - addr: output host address
03211  * - addrtype: type of address to query
03212  * - err: output error
03213  * Return values:
03214  * - 0: Hook has not consumed hostname query, query continues into DNS module
03215  * - != 0: Hook has consumed the query
03216  *
03217  * err must also be checked to determine if the hook consumed the query, but
03218  * the query failed
03219  */
03220 #ifdef __DOXYGEN__
03221 #define LWIP_HOOK_NETCONN_EXTERNAL_RESOLVE(name, addr, addrtype, err)
03222 #endif
03223 /**
03224  * @}
03225  */
03226 
03227 /*
03228    ---------------------------------------
03229    ---------- Debugging options ----------
03230    ---------------------------------------
03231 */
03232 /**
03233  * @defgroup lwip_opts_debugmsg Debug messages
03234  * @ingroup lwip_opts_debug
03235  * @{
03236  */
03237 /**
03238  * LWIP_DBG_MIN_LEVEL: After masking, the value of the debug is
03239  * compared against this value. If it is smaller, then debugging
03240  * messages are written.
03241  * @see debugging_levels
03242  */
03243 #if !defined LWIP_DBG_MIN_LEVEL || defined __DOXYGEN__
03244 #define LWIP_DBG_MIN_LEVEL              LWIP_DBG_LEVEL_ALL
03245 #endif
03246 
03247 /**
03248  * LWIP_DBG_TYPES_ON: A mask that can be used to globally enable/disable
03249  * debug messages of certain types.
03250  * @see debugging_levels
03251  */
03252 #if !defined LWIP_DBG_TYPES_ON || defined __DOXYGEN__
03253 #define LWIP_DBG_TYPES_ON               LWIP_DBG_ON
03254 #endif
03255 
03256 /**
03257  * ETHARP_DEBUG: Enable debugging in etharp.c.
03258  */
03259 #if !defined ETHARP_DEBUG || defined __DOXYGEN__
03260 #define ETHARP_DEBUG                    LWIP_DBG_OFF
03261 #endif
03262 
03263 /**
03264  * NETIF_DEBUG: Enable debugging in netif.c.
03265  */
03266 #if !defined NETIF_DEBUG || defined __DOXYGEN__
03267 #define NETIF_DEBUG                     LWIP_DBG_OFF
03268 #endif
03269 
03270 /**
03271  * PBUF_DEBUG: Enable debugging in pbuf.c.
03272  */
03273 #if !defined PBUF_DEBUG || defined __DOXYGEN__
03274 #define PBUF_DEBUG                      LWIP_DBG_OFF
03275 #endif
03276 
03277 /**
03278  * API_LIB_DEBUG: Enable debugging in api_lib.c.
03279  */
03280 #if !defined API_LIB_DEBUG || defined __DOXYGEN__
03281 #define API_LIB_DEBUG                   LWIP_DBG_OFF
03282 #endif
03283 
03284 /**
03285  * API_MSG_DEBUG: Enable debugging in api_msg.c.
03286  */
03287 #if !defined API_MSG_DEBUG || defined __DOXYGEN__
03288 #define API_MSG_DEBUG                   LWIP_DBG_OFF
03289 #endif
03290 
03291 /**
03292  * SOCKETS_DEBUG: Enable debugging in sockets.c.
03293  */
03294 #if !defined SOCKETS_DEBUG || defined __DOXYGEN__
03295 #define SOCKETS_DEBUG                   LWIP_DBG_OFF
03296 #endif
03297 
03298 /**
03299  * ICMP_DEBUG: Enable debugging in icmp.c.
03300  */
03301 #if !defined ICMP_DEBUG || defined __DOXYGEN__
03302 #define ICMP_DEBUG                      LWIP_DBG_OFF
03303 #endif
03304 
03305 /**
03306  * IGMP_DEBUG: Enable debugging in igmp.c.
03307  */
03308 #if !defined IGMP_DEBUG || defined __DOXYGEN__
03309 #define IGMP_DEBUG                      LWIP_DBG_OFF
03310 #endif
03311 
03312 /**
03313  * INET_DEBUG: Enable debugging in inet.c.
03314  */
03315 #if !defined INET_DEBUG || defined __DOXYGEN__
03316 #define INET_DEBUG                      LWIP_DBG_OFF
03317 #endif
03318 
03319 /**
03320  * IP_DEBUG: Enable debugging for IP.
03321  */
03322 #if !defined IP_DEBUG || defined __DOXYGEN__
03323 #define IP_DEBUG                        LWIP_DBG_OFF
03324 #endif
03325 
03326 /**
03327  * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass.
03328  */
03329 #if !defined IP_REASS_DEBUG || defined __DOXYGEN__
03330 #define IP_REASS_DEBUG                  LWIP_DBG_OFF
03331 #endif
03332 
03333 /**
03334  * RAW_DEBUG: Enable debugging in raw.c.
03335  */
03336 #if !defined RAW_DEBUG || defined __DOXYGEN__
03337 #define RAW_DEBUG                       LWIP_DBG_OFF
03338 #endif
03339 
03340 /**
03341  * MEM_DEBUG: Enable debugging in mem.c.
03342  */
03343 #if !defined MEM_DEBUG || defined __DOXYGEN__
03344 #define MEM_DEBUG                       LWIP_DBG_OFF
03345 #endif
03346 
03347 /**
03348  * MEMP_DEBUG: Enable debugging in memp.c.
03349  */
03350 #if !defined MEMP_DEBUG || defined __DOXYGEN__
03351 #define MEMP_DEBUG                      LWIP_DBG_OFF
03352 #endif
03353 
03354 /**
03355  * SYS_DEBUG: Enable debugging in sys.c.
03356  */
03357 #if !defined SYS_DEBUG || defined __DOXYGEN__
03358 #define SYS_DEBUG                       LWIP_DBG_OFF
03359 #endif
03360 
03361 /**
03362  * TIMERS_DEBUG: Enable debugging in timers.c.
03363  */
03364 #if !defined TIMERS_DEBUG || defined __DOXYGEN__
03365 #define TIMERS_DEBUG                    LWIP_DBG_OFF
03366 #endif
03367 
03368 /**
03369  * TCP_DEBUG: Enable debugging for TCP.
03370  */
03371 #if !defined TCP_DEBUG || defined __DOXYGEN__
03372 #define TCP_DEBUG                       LWIP_DBG_OFF
03373 #endif
03374 
03375 /**
03376  * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
03377  */
03378 #if !defined TCP_INPUT_DEBUG || defined __DOXYGEN__
03379 #define TCP_INPUT_DEBUG                 LWIP_DBG_OFF
03380 #endif
03381 
03382 /**
03383  * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit.
03384  */
03385 #if !defined TCP_FR_DEBUG || defined __DOXYGEN__
03386 #define TCP_FR_DEBUG                    LWIP_DBG_OFF
03387 #endif
03388 
03389 /**
03390  * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit
03391  * timeout.
03392  */
03393 #if !defined TCP_RTO_DEBUG || defined __DOXYGEN__
03394 #define TCP_RTO_DEBUG                   LWIP_DBG_OFF
03395 #endif
03396 
03397 /**
03398  * TCP_CWND_DEBUG: Enable debugging for TCP congestion window.
03399  */
03400 #if !defined TCP_CWND_DEBUG || defined __DOXYGEN__
03401 #define TCP_CWND_DEBUG                  LWIP_DBG_OFF
03402 #endif
03403 
03404 /**
03405  * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating.
03406  */
03407 #if !defined TCP_WND_DEBUG || defined __DOXYGEN__
03408 #define TCP_WND_DEBUG                   LWIP_DBG_OFF
03409 #endif
03410 
03411 /**
03412  * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
03413  */
03414 #if !defined TCP_OUTPUT_DEBUG || defined __DOXYGEN__
03415 #define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
03416 #endif
03417 
03418 /**
03419  * TCP_RST_DEBUG: Enable debugging for TCP with the RST message.
03420  */
03421 #if !defined TCP_RST_DEBUG || defined __DOXYGEN__
03422 #define TCP_RST_DEBUG                   LWIP_DBG_OFF
03423 #endif
03424 
03425 /**
03426  * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths.
03427  */
03428 #if !defined TCP_QLEN_DEBUG || defined __DOXYGEN__
03429 #define TCP_QLEN_DEBUG                  LWIP_DBG_OFF
03430 #endif
03431 
03432 /**
03433  * UDP_DEBUG: Enable debugging in UDP.
03434  */
03435 #if !defined UDP_DEBUG || defined __DOXYGEN__
03436 #define UDP_DEBUG                       LWIP_DBG_OFF
03437 #endif
03438 
03439 /**
03440  * TCPIP_DEBUG: Enable debugging in tcpip.c.
03441  */
03442 #if !defined TCPIP_DEBUG || defined __DOXYGEN__
03443 #define TCPIP_DEBUG                     LWIP_DBG_OFF
03444 #endif
03445 
03446 /**
03447  * SLIP_DEBUG: Enable debugging in slipif.c.
03448  */
03449 #if !defined SLIP_DEBUG || defined __DOXYGEN__
03450 #define SLIP_DEBUG                      LWIP_DBG_OFF
03451 #endif
03452 
03453 /**
03454  * DHCP_DEBUG: Enable debugging in dhcp.c.
03455  */
03456 #if !defined DHCP_DEBUG || defined __DOXYGEN__
03457 #define DHCP_DEBUG                      LWIP_DBG_OFF
03458 #endif
03459 
03460 /**
03461  * AUTOIP_DEBUG: Enable debugging in autoip.c.
03462  */
03463 #if !defined AUTOIP_DEBUG || defined __DOXYGEN__
03464 #define AUTOIP_DEBUG                    LWIP_DBG_OFF
03465 #endif
03466 
03467 /**
03468  * DNS_DEBUG: Enable debugging for DNS.
03469  */
03470 #if !defined DNS_DEBUG || defined __DOXYGEN__
03471 #define DNS_DEBUG                       LWIP_DBG_OFF
03472 #endif
03473 
03474 /**
03475  * IP6_DEBUG: Enable debugging for IPv6.
03476  */
03477 #if !defined IP6_DEBUG || defined __DOXYGEN__
03478 #define IP6_DEBUG                       LWIP_DBG_OFF
03479 #endif
03480 
03481 /**
03482  * DHCP6_DEBUG: Enable debugging in dhcp6.c.
03483  */
03484 #if !defined DHCP6_DEBUG || defined __DOXYGEN__
03485 #define DHCP6_DEBUG                     LWIP_DBG_OFF
03486 #endif
03487 /**
03488  * @}
03489  */
03490 
03491 /**
03492  * LWIP_TESTMODE: Changes to make unit test possible
03493  */
03494 #if !defined LWIP_TESTMODE
03495 #define LWIP_TESTMODE                   0
03496 #endif
03497 
03498 /*
03499    --------------------------------------------------
03500    ---------- Performance tracking options ----------
03501    --------------------------------------------------
03502 */
03503 /**
03504  * @defgroup lwip_opts_perf Performance
03505  * @ingroup lwip_opts_debug
03506  * @{
03507  */
03508 /**
03509  * LWIP_PERF: Enable performance testing for lwIP
03510  * (if enabled, arch/perf.h is included)
03511  */
03512 #if !defined LWIP_PERF || defined __DOXYGEN__
03513 #define LWIP_PERF                       0
03514 #endif
03515 /**
03516  * @}
03517  */
03518 
03519 #endif /* LWIP_HDR_OPT_H */