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