The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_os_bsd.h

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    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/8.1/sys/netinet/sctp_os_bsd.h 202951 2010-01-24 22:17:08Z 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 #include <machine/cpu.h>
   65 
   66 #include <net/if.h>
   67 #include <net/if_types.h>
   68 #include <net/if_var.h>
   69 #include <net/route.h>
   70 #include <net/vnet.h>
   71 
   72 #include <netinet/in.h>
   73 #include <netinet/in_systm.h>
   74 #include <netinet/ip.h>
   75 #include <netinet/in_pcb.h>
   76 #include <netinet/in_var.h>
   77 #include <netinet/ip_var.h>
   78 #include <netinet/ip_icmp.h>
   79 #include <netinet/icmp_var.h>
   80 
   81 #ifdef IPSEC
   82 #include <netipsec/ipsec.h>
   83 #include <netipsec/key.h>
   84 #endif                          /* IPSEC */
   85 
   86 #ifdef INET6
   87 #include <sys/domain.h>
   88 #ifdef IPSEC
   89 #include <netipsec/ipsec6.h>
   90 #endif
   91 #include <netinet/ip6.h>
   92 #include <netinet6/ip6_var.h>
   93 #include <netinet6/in6_pcb.h>
   94 #include <netinet/icmp6.h>
   95 #include <netinet6/ip6protosw.h>
   96 #include <netinet6/nd6.h>
   97 #include <netinet6/scope6_var.h>
   98 #endif                          /* INET6 */
   99 
  100 
  101 #include <netinet/ip_options.h>
  102 
  103 #ifndef in6pcb
  104 #define in6pcb          inpcb
  105 #endif
  106 /* Declare all the malloc names for all the various mallocs */
  107 MALLOC_DECLARE(SCTP_M_MAP);
  108 MALLOC_DECLARE(SCTP_M_STRMI);
  109 MALLOC_DECLARE(SCTP_M_STRMO);
  110 MALLOC_DECLARE(SCTP_M_ASC_ADDR);
  111 MALLOC_DECLARE(SCTP_M_ASC_IT);
  112 MALLOC_DECLARE(SCTP_M_AUTH_CL);
  113 MALLOC_DECLARE(SCTP_M_AUTH_KY);
  114 MALLOC_DECLARE(SCTP_M_AUTH_HL);
  115 MALLOC_DECLARE(SCTP_M_AUTH_IF);
  116 MALLOC_DECLARE(SCTP_M_STRESET);
  117 MALLOC_DECLARE(SCTP_M_CMSG);
  118 MALLOC_DECLARE(SCTP_M_COPYAL);
  119 MALLOC_DECLARE(SCTP_M_VRF);
  120 MALLOC_DECLARE(SCTP_M_IFA);
  121 MALLOC_DECLARE(SCTP_M_IFN);
  122 MALLOC_DECLARE(SCTP_M_TIMW);
  123 MALLOC_DECLARE(SCTP_M_MVRF);
  124 MALLOC_DECLARE(SCTP_M_ITER);
  125 MALLOC_DECLARE(SCTP_M_SOCKOPT);
  126 
  127 #if defined(SCTP_LOCAL_TRACE_BUF)
  128 
  129 #define SCTP_GET_CYCLECOUNT get_cyclecount()
  130 #define SCTP_CTR6 sctp_log_trace
  131 
  132 #else
  133 #define SCTP_CTR6 CTR6
  134 #endif
  135 
  136 /*
  137  * Macros to expand out globals defined by various modules
  138  * to either a real global or a virtualized instance of one,
  139  * depending on whether VIMAGE is defined.
  140  */
  141 /* then define the macro(s) that hook into the vimage macros */
  142 #define MODULE_GLOBAL(__SYMBOL) V_##__SYMBOL
  143 
  144 #define V_system_base_info VNET(system_base_info)
  145 #define SCTP_BASE_INFO(__m) V_system_base_info.sctppcbinfo.__m
  146 #define SCTP_BASE_STATS V_system_base_info.sctpstat
  147 #define SCTP_BASE_STATS_SYSCTL VNET_NAME(system_base_info.sctpstat)
  148 #define SCTP_BASE_STAT(__m)     V_system_base_info.sctpstat.__m
  149 #define SCTP_BASE_SYSCTL(__m) VNET_NAME(system_base_info.sctpsysctl.__m)
  150 #define SCTP_BASE_VAR(__m) V_system_base_info.__m
  151 
  152 /*
  153  *
  154  */
  155 #define USER_ADDR_NULL  (NULL)  /* FIX ME: temp */
  156 
  157 #if defined(SCTP_DEBUG)
  158 #define SCTPDBG(level, params...)                                       \
  159 {                                                                       \
  160     do {                                                                \
  161         if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {                 \
  162             printf(params);                                             \
  163         }                                                               \
  164     } while (0);                                                        \
  165 }
  166 #define SCTPDBG_ADDR(level, addr)                                       \
  167 {                                                                       \
  168     do {                                                                \
  169         if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {                 \
  170             sctp_print_address(addr);                                   \
  171         }                                                               \
  172     } while (0);                                                        \
  173 }
  174 #define SCTPDBG_PKT(level, iph, sh)                                     \
  175 {                                                                       \
  176     do {                                                                \
  177             if (SCTP_BASE_SYSCTL(sctp_debug_on) & level) {              \
  178                     sctp_print_address_pkt(iph, sh);                    \
  179             }                                                           \
  180     } while (0);                                                        \
  181 }
  182 #else
  183 #define SCTPDBG(level, params...)
  184 #define SCTPDBG_ADDR(level, addr)
  185 #define SCTPDBG_PKT(level, iph, sh)
  186 #endif
  187 #define SCTP_PRINTF(params...)  printf(params)
  188 
  189 #ifdef SCTP_LTRACE_CHUNKS
  190 #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)
  191 #else
  192 #define SCTP_LTRACE_CHK(a, b, c, d)
  193 #endif
  194 
  195 #ifdef SCTP_LTRACE_ERRORS
  196 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
  197                                                          printf("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
  198                                                                      m, inp, stcb, net, file, __LINE__, err);
  199 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
  200                                                           printf("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
  201                                                                      inp, stcb, net, file, __LINE__, err);
  202 #else
  203 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
  204 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
  205 #endif
  206 
  207 
  208 /*
  209  * Local address and interface list handling
  210  */
  211 #define SCTP_MAX_VRF_ID         0
  212 #define SCTP_SIZE_OF_VRF_HASH   3
  213 #define SCTP_IFNAMSIZ           IFNAMSIZ
  214 #define SCTP_DEFAULT_VRFID      0
  215 #define SCTP_VRF_ADDR_HASH_SIZE 16
  216 #define SCTP_VRF_IFN_HASH_SIZE  3
  217 #define SCTP_INIT_VRF_TABLEID(vrf)
  218 
  219 #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
  220 #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)
  221 
  222 /*
  223  * Access to IFN's to help with src-addr-selection
  224  */
  225 /* This could return VOID if the index works but for BSD we provide both. */
  226 #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_rt->rt_ifp
  227 #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_rt->rt_ifp->if_index
  228 #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifp)
  229 
  230 /*
  231  * general memory allocation
  232  */
  233 #define SCTP_MALLOC(var, type, size, name) \
  234     do { \
  235         var = (type)malloc(size, name, M_NOWAIT); \
  236     } while (0)
  237 
  238 #define SCTP_FREE(var, type)    free(var, type)
  239 
  240 #define SCTP_MALLOC_SONAME(var, type, size) \
  241     do { \
  242         var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \
  243     } while (0)
  244 
  245 #define SCTP_FREE_SONAME(var)   free(var, M_SONAME)
  246 
  247 #define SCTP_PROCESS_STRUCT struct proc *
  248 
  249 /*
  250  * zone allocation functions
  251  */
  252 #include <vm/uma.h>
  253 
  254 /* SCTP_ZONE_INIT: initialize the zone */
  255 typedef struct uma_zone *sctp_zone_t;
  256 
  257 #define SCTP_ZONE_INIT(zone, name, size, number) { \
  258         zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
  259                 0); \
  260         uma_zone_set_max(zone, number); \
  261 }
  262 
  263 #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
  264 
  265 /* SCTP_ZONE_GET: allocate element from the zone */
  266 #define SCTP_ZONE_GET(zone, type) \
  267         (type *)uma_zalloc(zone, M_NOWAIT);
  268 
  269 /* SCTP_ZONE_FREE: free element from the zone */
  270 #define SCTP_ZONE_FREE(zone, element) \
  271         uma_zfree(zone, element);
  272 
  273 #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
  274 #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
  275 
  276 #define SCTP_M_COPYM    m_copym
  277 
  278 /*
  279  * timers
  280  */
  281 #include <sys/callout.h>
  282 typedef struct callout sctp_os_timer_t;
  283 
  284 
  285 #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
  286 #define SCTP_OS_TIMER_START     callout_reset
  287 #define SCTP_OS_TIMER_STOP      callout_stop
  288 #define SCTP_OS_TIMER_STOP_DRAIN callout_drain
  289 #define SCTP_OS_TIMER_PENDING   callout_pending
  290 #define SCTP_OS_TIMER_ACTIVE    callout_active
  291 #define SCTP_OS_TIMER_DEACTIVATE callout_deactivate
  292 
  293 #define sctp_get_tick_count() (ticks)
  294 
  295 #define SCTP_UNUSED __attribute__((unused))
  296 
  297 /*
  298  * Functions
  299  */
  300 /* Mbuf manipulation and access macros  */
  301 #define SCTP_BUF_LEN(m) (m->m_len)
  302 #define SCTP_BUF_NEXT(m) (m->m_next)
  303 #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
  304 #define SCTP_BUF_RESV_UF(m, size) m->m_data += size
  305 #define SCTP_BUF_AT(m, size) m->m_data + size
  306 #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
  307 #define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
  308 #define SCTP_BUF_TYPE(m) (m->m_type)
  309 #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
  310 #define SCTP_BUF_PREPEND        M_PREPEND
  311 
  312 #define SCTP_ALIGN_TO_END(m, len) if(m->m_flags & M_PKTHDR) { \
  313                                      MH_ALIGN(m, len); \
  314                                   } else if ((m->m_flags & M_EXT) == 0) { \
  315                                      M_ALIGN(m, len); \
  316                                   }
  317 
  318 /* We make it so if you have up to 4 threads
  319  * writting based on the default size of
  320  * the packet log 65 k, that would be
  321  * 4 16k packets before we would hit
  322  * a problem.
  323  */
  324 #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
  325 
  326 /*************************/
  327 /*      MTU              */
  328 /*************************/
  329 #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, af) ((struct ifnet *)ifn)->if_mtu
  330 #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, rt) ((rt != NULL) ? rt->rt_rmx.rmx_mtu : 0)
  331 #define SCTP_GATHER_MTU_FROM_INTFC(sctp_ifn) ((sctp_ifn->ifn_p != NULL) ? ((struct ifnet *)(sctp_ifn->ifn_p))->if_mtu : 0)
  332 #define SCTP_SET_MTU_OF_ROUTE(sa, rt, mtu) do { \
  333                                               if (rt != NULL) \
  334                                                  rt->rt_rmx.rmx_mtu = mtu; \
  335                                            } while(0)
  336 
  337 /* (de-)register interface event notifications */
  338 #define SCTP_REGISTER_INTERFACE(ifhandle, af)
  339 #define SCTP_DEREGISTER_INTERFACE(ifhandle, af)
  340 
  341 
  342 /*************************/
  343 /* These are for logging */
  344 /*************************/
  345 /* return the base ext data pointer */
  346 #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
  347  /* return the refcnt of the data pointer */
  348 #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
  349 /* return any buffer related flags, this is
  350  * used beyond logging for apple only.
  351  */
  352 #define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
  353 
  354 /* For BSD this just accesses the M_PKTHDR length
  355  * so it operates on an mbuf with hdr flag. Other
  356  * O/S's may have seperate packet header and mbuf
  357  * chain pointers.. thus the macro.
  358  */
  359 #define SCTP_HEADER_TO_CHAIN(m) (m)
  360 #define SCTP_DETACH_HEADER_FROM_CHAIN(m)
  361 #define SCTP_HEADER_LEN(m) (m->m_pkthdr.len)
  362 #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
  363 #define SCTP_RELEASE_HEADER(m)
  364 #define SCTP_RELEASE_PKT(m)     sctp_m_freem(m)
  365 #define SCTP_ENABLE_UDP_CSUM(m) do { \
  366                                         m->m_pkthdr.csum_flags = CSUM_UDP; \
  367                                         m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
  368                                 } while (0)
  369 
  370 #define SCTP_GET_PKT_VRFID(m, vrf_id)  ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
  371 
  372 
  373 
  374 /* Attach the chain of data into the sendable packet. */
  375 #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
  376                                                  pak = m; \
  377                                                  pak->m_pkthdr.len = packet_length; \
  378                          } while(0)
  379 
  380 /* Other m_pkthdr type things */
  381 #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
  382 #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
  383 
  384 
  385 /* This converts any input packet header
  386  * into the chain of data holders, for BSD
  387  * its a NOP.
  388  */
  389 
  390 /* Macro's for getting length from V6/V4 header */
  391 #define SCTP_GET_IPV4_LENGTH(iph) (iph->ip_len)
  392 #define SCTP_GET_IPV6_LENGTH(ip6) (ntohs(ip6->ip6_plen))
  393 
  394 /* get the v6 hop limit */
  395 #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)));
  396 
  397 /* is the endpoint v6only? */
  398 #define SCTP_IPV6_V6ONLY(inp)   (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
  399 /* is the socket non-blocking? */
  400 #define SCTP_SO_IS_NBIO(so)     ((so)->so_state & SS_NBIO)
  401 #define SCTP_SET_SO_NBIO(so)    ((so)->so_state |= SS_NBIO)
  402 #define SCTP_CLEAR_SO_NBIO(so)  ((so)->so_state &= ~SS_NBIO)
  403 /* get the socket type */
  404 #define SCTP_SO_TYPE(so)        ((so)->so_type)
  405 /* reserve sb space for a socket */
  406 #define SCTP_SORESERVE(so, send, recv)  soreserve(so, send, recv)
  407 /* wakeup a socket */
  408 #define SCTP_SOWAKEUP(so)       wakeup(&(so)->so_timeo)
  409 /* clear the socket buffer state */
  410 #define SCTP_SB_CLEAR(sb)       \
  411         (sb).sb_cc = 0;         \
  412         (sb).sb_mb = NULL;      \
  413         (sb).sb_mbcnt = 0;
  414 
  415 #define SCTP_SB_LIMIT_RCV(so) so->so_rcv.sb_hiwat
  416 #define SCTP_SB_LIMIT_SND(so) so->so_snd.sb_hiwat
  417 
  418 /*
  419  * routes, output, etc.
  420  */
  421 typedef struct route sctp_route_t;
  422 typedef struct rtentry sctp_rtentry_t;
  423 
  424 #define SCTP_RTALLOC(ro, vrf_id) rtalloc_ign((struct route *)ro, 0UL)
  425 
  426 /* Future zero copy wakeup/send  function */
  427 #define SCTP_ZERO_COPY_EVENT(inp, so)
  428 /* This is re-pulse ourselves for sendbuf */
  429 #define SCTP_ZERO_COPY_SENDQ_EVENT(inp, so)
  430 
  431 /*
  432  * IP output routines
  433  */
  434 #define SCTP_IP_OUTPUT(result, o_pak, ro, stcb, vrf_id) \
  435 { \
  436         int o_flgs = 0; \
  437         if (stcb && stcb->sctp_ep && stcb->sctp_ep->sctp_socket) { \
  438                 o_flgs = IP_RAWOUTPUT | (stcb->sctp_ep->sctp_socket->so_options & SO_DONTROUTE); \
  439         } else { \
  440                 o_flgs = IP_RAWOUTPUT; \
  441         } \
  442         result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \
  443 }
  444 
  445 #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, stcb, vrf_id) \
  446 { \
  447         if (stcb && stcb->sctp_ep) \
  448                 result = ip6_output(o_pak, \
  449                                     ((struct in6pcb *)(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 HAVE_SHA2
  464 
  465 #define SCTP_READ_RANDOM(buf, len)      read_random(buf, len)
  466 
  467 #ifdef USE_SCTP_SHA1
  468 #include <netinet/sctp_sha1.h>
  469 #else
  470 #include <crypto/sha1.h>
  471 /* map standard crypto API names */
  472 #define SHA1_Init       SHA1Init
  473 #define SHA1_Update     SHA1Update
  474 #define SHA1_Final(x,y) SHA1Final((caddr_t)x, y)
  475 #endif
  476 
  477 #if defined(HAVE_SHA2)
  478 #include <crypto/sha2/sha2.h>
  479 #endif
  480 
  481 #endif
  482 
  483 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
  484 #if defined(INVARIANTS)
  485 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
  486 { \
  487         int32_t oldval; \
  488         oldval = atomic_fetchadd_int(addr, -val); \
  489         if (oldval < val) { \
  490                 panic("Counter goes negative"); \
  491         } \
  492 }
  493 #else
  494 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
  495 { \
  496         int32_t oldval; \
  497         oldval = atomic_fetchadd_int(addr, -val); \
  498         if (oldval < val) { \
  499                 *addr = 0; \
  500         } \
  501 }
  502 #endif

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