1 /*-
2 * Copyright (c) 2006-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/10.2/sys/netinet/sctp_os_bsd.h 284633 2015-06-20 08:25:27Z tuexen $");
35
36 #ifndef _NETINET_SCTP_OS_BSD_H_
37 #define _NETINET_SCTP_OS_BSD_H_
38 /*
39 * includes
40 */
41 #include "opt_ipsec.h"
42 #include "opt_compat.h"
43 #include "opt_inet6.h"
44 #include "opt_inet.h"
45 #include "opt_sctp.h"
46
47 #include <sys/param.h>
48 #include <sys/ktr.h>
49 #include <sys/systm.h>
50 #include <sys/malloc.h>
51 #include <sys/kernel.h>
52 #include <sys/sysctl.h>
53 #include <sys/mbuf.h>
54 #include <sys/protosw.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/jail.h>
58 #include <sys/sysctl.h>
59 #include <sys/resourcevar.h>
60 #include <sys/uio.h>
61 #include <sys/lock.h>
62 #include <sys/rwlock.h>
63 #include <sys/kthread.h>
64 #include <sys/priv.h>
65 #include <sys/random.h>
66 #include <sys/limits.h>
67 #include <sys/queue.h>
68 #include <machine/cpu.h>
69
70 #include <net/if.h>
71 #include <net/if_types.h>
72 #include <net/if_var.h>
73 #include <net/route.h>
74 #include <net/vnet.h>
75
76 #include <netinet/in.h>
77 #include <netinet/in_systm.h>
78 #include <netinet/ip.h>
79 #include <netinet/in_pcb.h>
80 #include <netinet/in_var.h>
81 #include <netinet/ip_var.h>
82 #include <netinet/ip_icmp.h>
83 #include <netinet/icmp_var.h>
84
85 #ifdef IPSEC
86 #include <netipsec/ipsec.h>
87 #include <netipsec/key.h>
88 #endif /* IPSEC */
89
90 #ifdef INET6
91 #include <sys/domain.h>
92 #ifdef IPSEC
93 #include <netipsec/ipsec6.h>
94 #endif
95 #include <netinet/ip6.h>
96 #include <netinet6/ip6_var.h>
97 #include <netinet6/in6_pcb.h>
98 #include <netinet/icmp6.h>
99 #include <netinet6/ip6protosw.h>
100 #include <netinet6/nd6.h>
101 #include <netinet6/scope6_var.h>
102 #endif /* INET6 */
103
104
105 #include <netinet/ip_options.h>
106
107 #include <crypto/sha1.h>
108 #include <crypto/sha2/sha2.h>
109
110 #ifndef in6pcb
111 #define in6pcb inpcb
112 #endif
113 /* Declare all the malloc names for all the various mallocs */
114 MALLOC_DECLARE(SCTP_M_MAP);
115 MALLOC_DECLARE(SCTP_M_STRMI);
116 MALLOC_DECLARE(SCTP_M_STRMO);
117 MALLOC_DECLARE(SCTP_M_ASC_ADDR);
118 MALLOC_DECLARE(SCTP_M_ASC_IT);
119 MALLOC_DECLARE(SCTP_M_AUTH_CL);
120 MALLOC_DECLARE(SCTP_M_AUTH_KY);
121 MALLOC_DECLARE(SCTP_M_AUTH_HL);
122 MALLOC_DECLARE(SCTP_M_AUTH_IF);
123 MALLOC_DECLARE(SCTP_M_STRESET);
124 MALLOC_DECLARE(SCTP_M_CMSG);
125 MALLOC_DECLARE(SCTP_M_COPYAL);
126 MALLOC_DECLARE(SCTP_M_VRF);
127 MALLOC_DECLARE(SCTP_M_IFA);
128 MALLOC_DECLARE(SCTP_M_IFN);
129 MALLOC_DECLARE(SCTP_M_TIMW);
130 MALLOC_DECLARE(SCTP_M_MVRF);
131 MALLOC_DECLARE(SCTP_M_ITER);
132 MALLOC_DECLARE(SCTP_M_SOCKOPT);
133 MALLOC_DECLARE(SCTP_M_MCORE);
134
135 #if defined(SCTP_LOCAL_TRACE_BUF)
136
137 #define SCTP_GET_CYCLECOUNT get_cyclecount()
138 #define SCTP_CTR6 sctp_log_trace
139
140 #else
141 #define SCTP_CTR6 CTR6
142 #endif
143
144 /*
145 * Macros to expand out globals defined by various modules
146 * to either a real global or a virtualized instance of one,
147 * depending on whether VIMAGE is defined.
148 */
149 /* then define the macro(s) that hook into the vimage macros */
150 #define MODULE_GLOBAL(__SYMBOL) V_##__SYMBOL
151
152 #define V_system_base_info VNET(system_base_info)
153 #define SCTP_BASE_INFO(__m) V_system_base_info.sctppcbinfo.__m
154 #define SCTP_BASE_STATS V_system_base_info.sctpstat
155 #define SCTP_BASE_STAT(__m) V_system_base_info.sctpstat.__m
156 #define SCTP_BASE_SYSCTL(__m) V_system_base_info.sctpsysctl.__m
157 #define SCTP_BASE_VAR(__m) V_system_base_info.__m
158
159 #define SCTP_PRINTF(params...) printf(params)
160 #if defined(SCTP_DEBUG)
161 #define SCTPDBG(level, params...) \
162 { \
163 do { \
164 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
165 SCTP_PRINTF(params); \
166 } \
167 } while (0); \
168 }
169 #define SCTPDBG_ADDR(level, addr) \
170 { \
171 do { \
172 if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
173 sctp_print_address(addr); \
174 } \
175 } while (0); \
176 }
177 #else
178 #define SCTPDBG(level, params...)
179 #define SCTPDBG_ADDR(level, addr)
180 #endif
181
182 #ifdef SCTP_LTRACE_CHUNKS
183 #define SCTP_LTRACE_CHK(a, b, c, d) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_CHUNK_ENABLE) SCTP_CTR6(KTR_SUBSYS, "SCTP:%d[%d]:%x-%x-%x-%x", SCTP_LOG_CHUNK_PROC, 0, a, b, c, d)
184 #else
185 #define SCTP_LTRACE_CHK(a, b, c, d)
186 #endif
187
188 #ifdef SCTP_LTRACE_ERRORS
189 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) \
190 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
191 SCTP_PRINTF("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
192 m, inp, stcb, net, file, __LINE__, err);
193 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) \
194 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
195 SCTP_PRINTF("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
196 inp, stcb, net, file, __LINE__, err);
197 #else
198 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
199 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
200 #endif
201
202
203 /*
204 * Local address and interface list handling
205 */
206 #define SCTP_MAX_VRF_ID 0
207 #define SCTP_SIZE_OF_VRF_HASH 3
208 #define SCTP_IFNAMSIZ IFNAMSIZ
209 #define SCTP_DEFAULT_VRFID 0
210 #define SCTP_VRF_ADDR_HASH_SIZE 16
211 #define SCTP_VRF_IFN_HASH_SIZE 3
212 #define SCTP_INIT_VRF_TABLEID(vrf)
213
214 #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
215 #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)
216
217 /*
218 * Access to IFN's to help with src-addr-selection
219 */
220 /* This could return VOID if the index works but for BSD we provide both. */
221 #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_rt->rt_ifp
222 #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_rt->rt_ifp->if_index
223 #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifp)
224
225 /*
226 * general memory allocation
227 */
228 #define SCTP_MALLOC(var, type, size, name) \
229 do { \
230 var = (type)malloc(size, name, M_NOWAIT); \
231 } while (0)
232
233 #define SCTP_FREE(var, type) free(var, type)
234
235 #define SCTP_MALLOC_SONAME(var, type, size) \
236 do { \
237 var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \
238 } while (0)
239
240 #define SCTP_FREE_SONAME(var) free(var, M_SONAME)
241
242 #define SCTP_PROCESS_STRUCT struct proc *
243
244 /*
245 * zone allocation functions
246 */
247 #include <vm/uma.h>
248
249 /* SCTP_ZONE_INIT: initialize the zone */
250 typedef struct uma_zone *sctp_zone_t;
251
252 #define SCTP_ZONE_INIT(zone, name, size, number) { \
253 zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
254 0); \
255 uma_zone_set_max(zone, number); \
256 }
257
258 #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
259
260 /* SCTP_ZONE_GET: allocate element from the zone */
261 #define SCTP_ZONE_GET(zone, type) \
262 (type *)uma_zalloc(zone, M_NOWAIT);
263
264 /* SCTP_ZONE_FREE: free element from the zone */
265 #define SCTP_ZONE_FREE(zone, element) \
266 uma_zfree(zone, element);
267
268 #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
269 #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
270
271 #define SCTP_M_COPYM m_copym
272
273 /*
274 * timers
275 */
276 #include <sys/callout.h>
277 typedef struct callout sctp_os_timer_t;
278
279
280 #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
281 #define SCTP_OS_TIMER_START callout_reset
282 #define SCTP_OS_TIMER_STOP callout_stop
283 #define SCTP_OS_TIMER_STOP_DRAIN callout_drain
284 #define SCTP_OS_TIMER_PENDING callout_pending
285 #define SCTP_OS_TIMER_ACTIVE callout_active
286 #define SCTP_OS_TIMER_DEACTIVATE callout_deactivate
287
288 #define sctp_get_tick_count() (ticks)
289
290 #define SCTP_UNUSED __attribute__((unused))
291
292 /*
293 * Functions
294 */
295 /* Mbuf manipulation and access macros */
296 #define SCTP_BUF_LEN(m) (m->m_len)
297 #define SCTP_BUF_NEXT(m) (m->m_next)
298 #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
299 #define SCTP_BUF_RESV_UF(m, size) m->m_data += size
300 #define SCTP_BUF_AT(m, size) m->m_data + size
301 #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
302 #define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
303 #define SCTP_BUF_TYPE(m) (m->m_type)
304 #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
305 #define SCTP_BUF_PREPEND M_PREPEND
306
307 #define SCTP_ALIGN_TO_END(m, len) if(m->m_flags & M_PKTHDR) { \
308 MH_ALIGN(m, len); \
309 } else if ((m->m_flags & M_EXT) == 0) { \
310 M_ALIGN(m, len); \
311 }
312
313 /* We make it so if you have up to 4 threads
314 * writing based on the default size of
315 * the packet log 65 k, that would be
316 * 4 16k packets before we would hit
317 * a problem.
318 */
319 #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
320
321 /*************************/
322 /* MTU */
323 /*************************/
324 #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, af) ((struct ifnet *)ifn)->if_mtu
325 #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, rt) ((uint32_t)((rt != NULL) ? rt->rt_mtu : 0))
326 #define SCTP_GATHER_MTU_FROM_INTFC(sctp_ifn) ((sctp_ifn->ifn_p != NULL) ? ((struct ifnet *)(sctp_ifn->ifn_p))->if_mtu : 0)
327 #define SCTP_SET_MTU_OF_ROUTE(sa, rt, mtu) do { \
328 if (rt != NULL) \
329 rt->rt_mtu = mtu; \
330 } while(0)
331
332 /* (de-)register interface event notifications */
333 #define SCTP_REGISTER_INTERFACE(ifhandle, af)
334 #define SCTP_DEREGISTER_INTERFACE(ifhandle, af)
335
336
337 /*************************/
338 /* These are for logging */
339 /*************************/
340 /* return the base ext data pointer */
341 #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
342 /* return the refcnt of the data pointer */
343 #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
344 /* return any buffer related flags, this is
345 * used beyond logging for apple only.
346 */
347 #define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
348
349 /* For BSD this just accesses the M_PKTHDR length
350 * so it operates on an mbuf with hdr flag. Other
351 * O/S's may have separate packet header and mbuf
352 * chain pointers.. thus the macro.
353 */
354 #define SCTP_HEADER_TO_CHAIN(m) (m)
355 #define SCTP_DETACH_HEADER_FROM_CHAIN(m)
356 #define SCTP_HEADER_LEN(m) ((m)->m_pkthdr.len)
357 #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
358 #define SCTP_RELEASE_HEADER(m)
359 #define SCTP_RELEASE_PKT(m) sctp_m_freem(m)
360 #define SCTP_ENABLE_UDP_CSUM(m) do { \
361 m->m_pkthdr.csum_flags = CSUM_UDP; \
362 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
363 } while (0)
364
365 #define SCTP_GET_PKT_VRFID(m, vrf_id) ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
366
367
368
369 /* Attach the chain of data into the sendable packet. */
370 #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
371 pak = m; \
372 pak->m_pkthdr.len = packet_length; \
373 } while(0)
374
375 /* Other m_pkthdr type things */
376 #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
377 #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
378
379
380 /* This converts any input packet header
381 * into the chain of data holders, for BSD
382 * its a NOP.
383 */
384
385 /* get the v6 hop limit */
386 #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)));
387
388 /* is the endpoint v6only? */
389 #define SCTP_IPV6_V6ONLY(inp) (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
390 /* is the socket non-blocking? */
391 #define SCTP_SO_IS_NBIO(so) ((so)->so_state & SS_NBIO)
392 #define SCTP_SET_SO_NBIO(so) ((so)->so_state |= SS_NBIO)
393 #define SCTP_CLEAR_SO_NBIO(so) ((so)->so_state &= ~SS_NBIO)
394 /* get the socket type */
395 #define SCTP_SO_TYPE(so) ((so)->so_type)
396 /* reserve sb space for a socket */
397 #define SCTP_SORESERVE(so, send, recv) soreserve(so, send, recv)
398 /* wakeup a socket */
399 #define SCTP_SOWAKEUP(so) wakeup(&(so)->so_timeo)
400 /* clear the socket buffer state */
401 #define SCTP_SB_CLEAR(sb) \
402 (sb).sb_cc = 0; \
403 (sb).sb_mb = NULL; \
404 (sb).sb_mbcnt = 0;
405
406 #define SCTP_SB_LIMIT_RCV(so) so->so_rcv.sb_hiwat
407 #define SCTP_SB_LIMIT_SND(so) so->so_snd.sb_hiwat
408
409 /*
410 * routes, output, etc.
411 */
412 typedef struct route sctp_route_t;
413 typedef struct rtentry sctp_rtentry_t;
414
415 #define SCTP_RTALLOC(ro, vrf_id, fibnum) \
416 rtalloc_ign_fib((struct route *)ro, 0UL, fibnum)
417
418 /* Future zero copy wakeup/send function */
419 #define SCTP_ZERO_COPY_EVENT(inp, so)
420 /* This is re-pulse ourselves for sendbuf */
421 #define SCTP_ZERO_COPY_SENDQ_EVENT(inp, so)
422
423 /*
424 * SCTP protocol specific mbuf flags.
425 */
426 #define M_NOTIFICATION M_PROTO1 /* SCTP notification */
427
428 /*
429 * IP output routines
430 */
431 #define SCTP_IP_OUTPUT(result, o_pak, ro, stcb, vrf_id) \
432 { \
433 int o_flgs = IP_RAWOUTPUT; \
434 struct sctp_tcb *local_stcb = stcb; \
435 if (local_stcb && \
436 local_stcb->sctp_ep && \
437 local_stcb->sctp_ep->sctp_socket) \
438 o_flgs |= local_stcb->sctp_ep->sctp_socket->so_options & SO_DONTROUTE; \
439 m_clrprotoflags(o_pak); \
440 result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \
441 }
442
443 #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, stcb, vrf_id) \
444 { \
445 struct sctp_tcb *local_stcb = stcb; \
446 m_clrprotoflags(o_pak); \
447 if (local_stcb && local_stcb->sctp_ep) \
448 result = ip6_output(o_pak, \
449 ((struct in6pcb *)(local_stcb->sctp_ep))->in6p_outputopts, \
450 (ro), 0, 0, ifp, NULL); \
451 else \
452 result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL); \
453 }
454
455 struct mbuf *
456 sctp_get_mbuf_for_msg(unsigned int space_needed,
457 int want_header, int how, int allonebuf, int type);
458
459
460 /*
461 * SCTP AUTH
462 */
463 #define SCTP_READ_RANDOM(buf, len) read_random(buf, len)
464
465 /* map standard crypto API names */
466 #define SCTP_SHA1_CTX SHA1_CTX
467 #define SCTP_SHA1_INIT SHA1Init
468 #define SCTP_SHA1_UPDATE SHA1Update
469 #define SCTP_SHA1_FINAL(x,y) SHA1Final((caddr_t)x, y)
470
471 #define SCTP_SHA256_CTX SHA256_CTX
472 #define SCTP_SHA256_INIT SHA256_Init
473 #define SCTP_SHA256_UPDATE SHA256_Update
474 #define SCTP_SHA256_FINAL(x,y) SHA256_Final((caddr_t)x, y)
475
476 #endif
477
478 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
479 #if defined(INVARIANTS)
480 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
481 { \
482 int32_t oldval; \
483 oldval = atomic_fetchadd_int(addr, -val); \
484 if (oldval < val) { \
485 panic("Counter goes negative"); \
486 } \
487 }
488 #else
489 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
490 { \
491 int32_t oldval; \
492 oldval = atomic_fetchadd_int(addr, -val); \
493 if (oldval < val) { \
494 *addr = 0; \
495 } \
496 }
497 #endif
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