1 /*-
2 * Copyright (c) 2006-2007, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/7.4/sys/netinet/sctp_os_bsd.h 202712 2010-01-20 18:55:40Z tuexen $");
32 #ifndef __sctp_os_bsd_h__
33 #define __sctp_os_bsd_h__
34 /*
35 * includes
36 */
37 #include "opt_ipsec.h"
38 #include "opt_compat.h"
39 #include "opt_inet6.h"
40 #include "opt_inet.h"
41 #include "opt_sctp.h"
42
43 #include <sys/param.h>
44 #include <sys/ktr.h>
45 #include <sys/systm.h>
46 #include <sys/malloc.h>
47 #include <sys/kernel.h>
48 #include <sys/sysctl.h>
49 #include <sys/mbuf.h>
50 #include <sys/protosw.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/jail.h>
54 #include <sys/sysctl.h>
55 #include <sys/resourcevar.h>
56 #include <sys/uio.h>
57 #include <sys/lock.h>
58 #include <sys/rwlock.h>
59 #include <sys/kthread.h>
60 #include <sys/priv.h>
61 #include <sys/random.h>
62 #include <sys/limits.h>
63 #include <sys/queue.h>
64 #if defined(__FreeBSD__) && __FreeBSD_version >= 800044
65 #include <sys/vimage.h>
66 #endif
67 #include <machine/cpu.h>
68
69 #include <net/if.h>
70 #include <net/if_types.h>
71 #include <net/if_var.h>
72 #include <net/route.h>
73
74 #include <netinet/in.h>
75 #include <netinet/in_systm.h>
76 #include <netinet/ip.h>
77 #include <netinet/in_pcb.h>
78 #include <netinet/in_var.h>
79 #include <netinet/ip_var.h>
80 #include <netinet/ip_icmp.h>
81 #include <netinet/icmp_var.h>
82
83
84 #ifdef IPSEC
85 #include <netipsec/ipsec.h>
86 #include <netipsec/key.h>
87 #endif /* IPSEC */
88
89 #ifdef INET6
90 #include <sys/domain.h>
91 #ifdef IPSEC
92 #include <netipsec/ipsec6.h>
93 #endif
94 #include <netinet/ip6.h>
95 #include <netinet6/ip6_var.h>
96 #include <netinet6/in6_pcb.h>
97 #include <netinet/icmp6.h>
98 #include <netinet6/ip6protosw.h>
99 #include <netinet6/nd6.h>
100 #include <netinet6/scope6_var.h>
101 #endif /* INET6 */
102
103
104 #include <netinet/ip_options.h>
105
106 #ifndef in6pcb
107 #define in6pcb inpcb
108 #endif
109 /* Declare all the malloc names for all the various mallocs */
110 MALLOC_DECLARE(SCTP_M_MAP);
111 MALLOC_DECLARE(SCTP_M_STRMI);
112 MALLOC_DECLARE(SCTP_M_STRMO);
113 MALLOC_DECLARE(SCTP_M_ASC_ADDR);
114 MALLOC_DECLARE(SCTP_M_ASC_IT);
115 MALLOC_DECLARE(SCTP_M_AUTH_CL);
116 MALLOC_DECLARE(SCTP_M_AUTH_KY);
117 MALLOC_DECLARE(SCTP_M_AUTH_HL);
118 MALLOC_DECLARE(SCTP_M_AUTH_IF);
119 MALLOC_DECLARE(SCTP_M_STRESET);
120 MALLOC_DECLARE(SCTP_M_CMSG);
121 MALLOC_DECLARE(SCTP_M_COPYAL);
122 MALLOC_DECLARE(SCTP_M_VRF);
123 MALLOC_DECLARE(SCTP_M_IFA);
124 MALLOC_DECLARE(SCTP_M_IFN);
125 MALLOC_DECLARE(SCTP_M_TIMW);
126 MALLOC_DECLARE(SCTP_M_MVRF);
127 MALLOC_DECLARE(SCTP_M_ITER);
128 MALLOC_DECLARE(SCTP_M_SOCKOPT);
129
130 #if defined(SCTP_LOCAL_TRACE_BUF)
131
132 #define SCTP_GET_CYCLECOUNT get_cyclecount()
133 #define SCTP_CTR6 sctp_log_trace
134
135 #else
136 #define SCTP_CTR6 CTR6
137 #endif
138
139 #define SCTP_BASE_INFO(__m) system_base_info.sctppcbinfo.__m
140 #define SCTP_BASE_STATS system_base_info.sctpstat
141 #define SCTP_BASE_STAT(__m) system_base_info.sctpstat.__m
142 #define SCTP_BASE_SYSCTL(__m) system_base_info.sctpsysctl.__m
143 #define SCTP_BASE_VAR(__m) system_base_info.__m
144
145 /*
146 * Macros to expand out globals defined by various modules
147 * to either a real global or a virtualized instance of one,
148 * depending on whether VIMAGE is defined.
149 */
150 /* first define modules that supply us information */
151 #define MOD_NET net
152 #define MOD_INET inet
153 #define MOD_INET6 inet6
154 #define MOD_IPSEC ipsec
155
156 /* then define the macro(s) that hook into the vimage macros */
157 #if defined(__FreeBSD__) && __FreeBSD_version >= 800044 && defined(VIMAGE)
158 #if 0
159 #define VSYMNAME(__MODULE) vnet_ ## __MODULE
160 #define MODULE_GLOBAL(__MODULE, __SYMBOL) VSYM(VSYMNAME(__MODULE), __SYMBOL)
161 #else
162 #define MODULE_GLOBAL(__MODULE, __SYMBOL) V_ ## __SYMBOL
163 #endif
164 #else
165 #define MODULE_GLOBAL(__MODULE, __SYMBOL) (__SYMBOL)
166 #endif
167 /*
168 *
169 */
170 #define USER_ADDR_NULL (NULL) /* FIX ME: temp */
171
172 #if defined(SCTP_DEBUG)
173 #define SCTPDBG(level, params...) \
174 { \
175 do { \
176 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
177 printf(params); \
178 } \
179 } while (0); \
180 }
181 #define SCTPDBG_ADDR(level, addr) \
182 { \
183 do { \
184 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
185 sctp_print_address(addr); \
186 } \
187 } while (0); \
188 }
189 #define SCTPDBG_PKT(level, iph, sh) \
190 { \
191 do { \
192 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level) { \
193 sctp_print_address_pkt(iph, sh); \
194 } \
195 } while (0); \
196 }
197 #else
198 #define SCTPDBG(level, params...)
199 #define SCTPDBG_ADDR(level, addr)
200 #define SCTPDBG_PKT(level, iph, sh)
201 #endif
202 #define SCTP_PRINTF(params...) printf(params)
203
204 #ifdef SCTP_LTRACE_CHUNKS
205 #define SCTP_LTRACE_CHK(a, b, c, d) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_CHUNK_ENABLE) CTR6(KTR_SUBSYS, "SCTP:%d[%d]:%x-%x-%x-%x", SCTP_LOG_CHUNK_PROC, 0, a, b, c, d)
206 #else
207 #define SCTP_LTRACE_CHK(a, b, c, d)
208 #endif
209
210 #ifdef SCTP_LTRACE_ERRORS
211 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
212 printf("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
213 m, inp, stcb, net, file, __LINE__, err);
214 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
215 printf("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
216 inp, stcb, net, file, __LINE__, err);
217 #else
218 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
219 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
220 #endif
221
222
223 /*
224 * Local address and interface list handling
225 */
226 #define SCTP_MAX_VRF_ID 0
227 #define SCTP_SIZE_OF_VRF_HASH 3
228 #define SCTP_IFNAMSIZ IFNAMSIZ
229 #define SCTP_DEFAULT_VRFID 0
230 #define SCTP_VRF_ADDR_HASH_SIZE 16
231 #define SCTP_VRF_IFN_HASH_SIZE 3
232 #define SCTP_INIT_VRF_TABLEID(vrf)
233
234 #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
235 #define SCTP_ROUTE_IS_REAL_LOOP(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifa && (ro)->ro_rt->rt_ifa->ifa_ifp && (ro)->ro_rt->rt_ifa->ifa_ifp->if_type == IFT_LOOP)
236
237 /*
238 * Access to IFN's to help with src-addr-selection
239 */
240 /* This could return VOID if the index works but for BSD we provide both. */
241 #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_rt->rt_ifp
242 #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_rt->rt_ifp->if_index
243 #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifp)
244
245 /*
246 * general memory allocation
247 */
248 #define SCTP_MALLOC(var, type, size, name) \
249 do { \
250 MALLOC(var, type, size, name, M_NOWAIT); \
251 } while (0)
252
253 #define SCTP_FREE(var, type) FREE(var, type)
254
255 #define SCTP_MALLOC_SONAME(var, type, size) \
256 do { \
257 MALLOC(var, type, size, M_SONAME, M_WAITOK | M_ZERO); \
258 } while (0)
259
260 #define SCTP_FREE_SONAME(var) FREE(var, M_SONAME)
261
262 #define SCTP_PROCESS_STRUCT struct proc *
263
264 /*
265 * zone allocation functions
266 */
267 #include <vm/uma.h>
268
269 /* SCTP_ZONE_INIT: initialize the zone */
270 typedef struct uma_zone *sctp_zone_t;
271
272 #define UMA_ZFLAG_FULL 0x0020
273 #define SCTP_ZONE_INIT(zone, name, size, number) { \
274 zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
275 UMA_ZFLAG_FULL); \
276 uma_zone_set_max(zone, number); \
277 }
278
279 #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
280
281 /* SCTP_ZONE_GET: allocate element from the zone */
282 #define SCTP_ZONE_GET(zone, type) \
283 (type *)uma_zalloc(zone, M_NOWAIT);
284
285 /* SCTP_ZONE_FREE: free element from the zone */
286 #define SCTP_ZONE_FREE(zone, element) \
287 uma_zfree(zone, element);
288
289 #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
290 #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
291
292 #define SCTP_M_COPYM m_copym
293
294 /*
295 * timers
296 */
297 #include <sys/callout.h>
298 typedef struct callout sctp_os_timer_t;
299
300
301 #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
302 #define SCTP_OS_TIMER_START callout_reset
303 #define SCTP_OS_TIMER_STOP callout_stop
304 #define SCTP_OS_TIMER_STOP_DRAIN callout_drain
305 #define SCTP_OS_TIMER_PENDING callout_pending
306 #define SCTP_OS_TIMER_ACTIVE callout_active
307 #define SCTP_OS_TIMER_DEACTIVATE callout_deactivate
308
309 #define sctp_get_tick_count() (ticks)
310
311 #define SCTP_UNUSED __attribute__((unused))
312
313 /*
314 * Functions
315 */
316 /* Mbuf manipulation and access macros */
317 #define SCTP_BUF_LEN(m) (m->m_len)
318 #define SCTP_BUF_NEXT(m) (m->m_next)
319 #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
320 #define SCTP_BUF_RESV_UF(m, size) m->m_data += size
321 #define SCTP_BUF_AT(m, size) m->m_data + size
322 #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
323 #define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
324 #define SCTP_BUF_TYPE(m) (m->m_type)
325 #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
326 #define SCTP_BUF_PREPEND M_PREPEND
327
328 #define SCTP_ALIGN_TO_END(m, len) if(m->m_flags & M_PKTHDR) { \
329 MH_ALIGN(m, len); \
330 } else if ((m->m_flags & M_EXT) == 0) { \
331 M_ALIGN(m, len); \
332 }
333
334 /* We make it so if you have up to 4 threads
335 * writting based on the default size of
336 * the packet log 65 k, that would be
337 * 4 16k packets before we would hit
338 * a problem.
339 */
340 #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
341
342 /*************************/
343 /* MTU */
344 /*************************/
345 #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, af) ((struct ifnet *)ifn)->if_mtu
346 #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, rt) ((rt != NULL) ? rt->rt_rmx.rmx_mtu : 0)
347 #define SCTP_GATHER_MTU_FROM_INTFC(sctp_ifn) ((sctp_ifn->ifn_p != NULL) ? ((struct ifnet *)(sctp_ifn->ifn_p))->if_mtu : 0)
348 #define SCTP_SET_MTU_OF_ROUTE(sa, rt, mtu) do { \
349 if (rt != NULL) \
350 rt->rt_rmx.rmx_mtu = mtu; \
351 } while(0)
352
353 /* (de-)register interface event notifications */
354 #define SCTP_REGISTER_INTERFACE(ifhandle, af)
355 #define SCTP_DEREGISTER_INTERFACE(ifhandle, af)
356
357
358 /*************************/
359 /* These are for logging */
360 /*************************/
361 /* return the base ext data pointer */
362 #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
363 /* return the refcnt of the data pointer */
364 #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
365 /* return any buffer related flags, this is
366 * used beyond logging for apple only.
367 */
368 #define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
369
370 /* For BSD this just accesses the M_PKTHDR length
371 * so it operates on an mbuf with hdr flag. Other
372 * O/S's may have seperate packet header and mbuf
373 * chain pointers.. thus the macro.
374 */
375 #define SCTP_HEADER_TO_CHAIN(m) (m)
376 #define SCTP_DETACH_HEADER_FROM_CHAIN(m)
377 #define SCTP_HEADER_LEN(m) (m->m_pkthdr.len)
378 #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
379 #define SCTP_RELEASE_HEADER(m)
380 #define SCTP_RELEASE_PKT(m) sctp_m_freem(m)
381 #define SCTP_ENABLE_UDP_CSUM(m) do { \
382 m->m_pkthdr.csum_flags = CSUM_UDP; \
383 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
384 } while (0)
385
386 #define SCTP_GET_PKT_VRFID(m, vrf_id) ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
387
388
389
390 /* Attach the chain of data into the sendable packet. */
391 #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
392 pak = m; \
393 pak->m_pkthdr.len = packet_length; \
394 } while(0)
395
396 /* Other m_pkthdr type things */
397 #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
398 #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
399
400
401 /* This converts any input packet header
402 * into the chain of data holders, for BSD
403 * its a NOP.
404 */
405
406 /* Macro's for getting length from V6/V4 header */
407 #define SCTP_GET_IPV4_LENGTH(iph) (iph->ip_len)
408 #define SCTP_GET_IPV6_LENGTH(ip6) (ntohs(ip6->ip6_plen))
409
410 /* get the v6 hop limit */
411 #define SCTP_GET_HLIM(inp, ro) in6_selecthlim((struct in6pcb *)&inp->ip_inp.inp, (ro ? (ro->ro_rt ? (ro->ro_rt->rt_ifp) : (NULL)) : (NULL)));
412
413 /* is the endpoint v6only? */
414 #define SCTP_IPV6_V6ONLY(inp) (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
415 /* is the socket non-blocking? */
416 #define SCTP_SO_IS_NBIO(so) ((so)->so_state & SS_NBIO)
417 #define SCTP_SET_SO_NBIO(so) ((so)->so_state |= SS_NBIO)
418 #define SCTP_CLEAR_SO_NBIO(so) ((so)->so_state &= ~SS_NBIO)
419 /* get the socket type */
420 #define SCTP_SO_TYPE(so) ((so)->so_type)
421 /* reserve sb space for a socket */
422 #define SCTP_SORESERVE(so, send, recv) soreserve(so, send, recv)
423 /* wakeup a socket */
424 #define SCTP_SOWAKEUP(so) wakeup(&(so)->so_timeo)
425 /* clear the socket buffer state */
426 #define SCTP_SB_CLEAR(sb) \
427 (sb).sb_cc = 0; \
428 (sb).sb_mb = NULL; \
429 (sb).sb_mbcnt = 0;
430
431 #define SCTP_SB_LIMIT_RCV(so) so->so_rcv.sb_hiwat
432 #define SCTP_SB_LIMIT_SND(so) so->so_snd.sb_hiwat
433
434 /*
435 * routes, output, etc.
436 */
437 typedef struct route sctp_route_t;
438 typedef struct rtentry sctp_rtentry_t;
439
440 #define SCTP_RTALLOC(ro, vrf_id) rtalloc_ign((struct route *)ro, 0UL)
441
442 /* Future zero copy wakeup/send function */
443 #define SCTP_ZERO_COPY_EVENT(inp, so)
444 /* This is re-pulse ourselves for sendbuf */
445 #define SCTP_ZERO_COPY_SENDQ_EVENT(inp, so)
446
447 /*
448 * IP output routines
449 */
450 #define SCTP_IP_OUTPUT(result, o_pak, ro, stcb, vrf_id) \
451 { \
452 int o_flgs = 0; \
453 if (stcb && stcb->sctp_ep && stcb->sctp_ep->sctp_socket) { \
454 o_flgs = IP_RAWOUTPUT | (stcb->sctp_ep->sctp_socket->so_options & SO_DONTROUTE); \
455 } else { \
456 o_flgs = IP_RAWOUTPUT; \
457 } \
458 result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \
459 }
460
461 #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, stcb, vrf_id) \
462 { \
463 if (stcb && stcb->sctp_ep) \
464 result = ip6_output(o_pak, \
465 ((struct in6pcb *)(stcb->sctp_ep))->in6p_outputopts, \
466 (ro), 0, 0, ifp, NULL); \
467 else \
468 result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL); \
469 }
470
471 struct mbuf *
472 sctp_get_mbuf_for_msg(unsigned int space_needed,
473 int want_header, int how, int allonebuf, int type);
474
475
476 /*
477 * SCTP AUTH
478 */
479 #define HAVE_SHA2
480
481 #define SCTP_READ_RANDOM(buf, len) read_random(buf, len)
482
483 #ifdef USE_SCTP_SHA1
484 #include <netinet/sctp_sha1.h>
485 #else
486 #include <crypto/sha1.h>
487 /* map standard crypto API names */
488 #define SHA1_Init SHA1Init
489 #define SHA1_Update SHA1Update
490 #define SHA1_Final(x,y) SHA1Final((caddr_t)x, y)
491 #endif
492
493 #if defined(HAVE_SHA2)
494 #include <crypto/sha2/sha2.h>
495 #endif
496
497 #include <sys/md5.h>
498 /* map standard crypto API names */
499 #define MD5_Init MD5Init
500 #define MD5_Update MD5Update
501 #define MD5_Final MD5Final
502
503 #endif
504
505 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
506 #if defined(INVARIANTS)
507 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
508 { \
509 int32_t oldval; \
510 oldval = atomic_fetchadd_int(addr, -val); \
511 if (oldval < val) { \
512 panic("Counter goes negative"); \
513 } \
514 }
515 #else
516 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
517 { \
518 int32_t oldval; \
519 oldval = atomic_fetchadd_int(addr, -val); \
520 if (oldval < val) { \
521 *addr = 0; \
522 } \
523 }
524 #endif
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