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/8.0/sys/netinet/sctp_os_bsd.h 196232 2009-08-14 23:01:21Z zec $");
   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 VIMAGE
   82 #error "SCTP is not yet compatible with VIMAGE."
   83 #endif
   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 #ifndef in6pcb
  108 #define in6pcb          inpcb
  109 #endif
  110 /* Declare all the malloc names for all the various mallocs */
  111 MALLOC_DECLARE(SCTP_M_MAP);
  112 MALLOC_DECLARE(SCTP_M_STRMI);
  113 MALLOC_DECLARE(SCTP_M_STRMO);
  114 MALLOC_DECLARE(SCTP_M_ASC_ADDR);
  115 MALLOC_DECLARE(SCTP_M_ASC_IT);
  116 MALLOC_DECLARE(SCTP_M_AUTH_CL);
  117 MALLOC_DECLARE(SCTP_M_AUTH_KY);
  118 MALLOC_DECLARE(SCTP_M_AUTH_HL);
  119 MALLOC_DECLARE(SCTP_M_AUTH_IF);
  120 MALLOC_DECLARE(SCTP_M_STRESET);
  121 MALLOC_DECLARE(SCTP_M_CMSG);
  122 MALLOC_DECLARE(SCTP_M_COPYAL);
  123 MALLOC_DECLARE(SCTP_M_VRF);
  124 MALLOC_DECLARE(SCTP_M_IFA);
  125 MALLOC_DECLARE(SCTP_M_IFN);
  126 MALLOC_DECLARE(SCTP_M_TIMW);
  127 MALLOC_DECLARE(SCTP_M_MVRF);
  128 MALLOC_DECLARE(SCTP_M_ITER);
  129 MALLOC_DECLARE(SCTP_M_SOCKOPT);
  130 
  131 #if defined(SCTP_LOCAL_TRACE_BUF)
  132 
  133 #define SCTP_GET_CYCLECOUNT get_cyclecount()
  134 #define SCTP_CTR6 sctp_log_trace
  135 
  136 #else
  137 #define SCTP_CTR6 CTR6
  138 #endif
  139 
  140 #define SCTP_BASE_INFO(__m) system_base_info.sctppcbinfo.__m
  141 #define SCTP_BASE_STATS system_base_info.sctpstat
  142 #define SCTP_BASE_STAT(__m)     system_base_info.sctpstat.__m
  143 #define SCTP_BASE_SYSCTL(__m) system_base_info.sctpsysctl.__m
  144 #define SCTP_BASE_VAR(__m) system_base_info.__m
  145 
  146 /*
  147  * Macros to expand out globals defined by various modules
  148  * to either a real global or a virtualized instance of one,
  149  * depending on whether VIMAGE is defined.
  150  */
  151 /* first define modules that supply us information */
  152 #define MOD_NET net
  153 #define MOD_INET inet
  154 #define MOD_INET6 inet6
  155 #define MOD_IPSEC ipsec
  156 
  157 /* then define the macro(s) that hook into the vimage macros */
  158 #define MODULE_GLOBAL(__MODULE, __SYMBOL) V_ ## __SYMBOL
  159 
  160 /*
  161  *
  162  */
  163 #define USER_ADDR_NULL  (NULL)  /* FIX ME: temp */
  164 #define SCTP_LIST_EMPTY(list)   LIST_EMPTY(list)
  165 
  166 #if defined(SCTP_DEBUG)
  167 #define SCTPDBG(level, params...)                                       \
  168 {                                                                       \
  169     do {                                                                \
  170         if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {                 \
  171             printf(params);                                             \
  172         }                                                               \
  173     } while (0);                                                        \
  174 }
  175 #define SCTPDBG_ADDR(level, addr)                                       \
  176 {                                                                       \
  177     do {                                                                \
  178         if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {                 \
  179             sctp_print_address(addr);                                   \
  180         }                                                               \
  181     } while (0);                                                        \
  182 }
  183 #define SCTPDBG_PKT(level, iph, sh)                                     \
  184 {                                                                       \
  185     do {                                                                \
  186             if (SCTP_BASE_SYSCTL(sctp_debug_on) & level) {              \
  187                     sctp_print_address_pkt(iph, sh);                    \
  188             }                                                           \
  189     } while (0);                                                        \
  190 }
  191 #else
  192 #define SCTPDBG(level, params...)
  193 #define SCTPDBG_ADDR(level, addr)
  194 #define SCTPDBG_PKT(level, iph, sh)
  195 #endif
  196 #define SCTP_PRINTF(params...)  printf(params)
  197 
  198 #ifdef SCTP_LTRACE_CHUNKS
  199 #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)
  200 #else
  201 #define SCTP_LTRACE_CHK(a, b, c, d)
  202 #endif
  203 
  204 #ifdef SCTP_LTRACE_ERRORS
  205 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
  206                                                          printf("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
  207                                                                      m, inp, stcb, net, file, __LINE__, err);
  208 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
  209                                                           printf("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
  210                                                                      inp, stcb, net, file, __LINE__, err);
  211 #else
  212 #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
  213 #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
  214 #endif
  215 
  216 
  217 /*
  218  * Local address and interface list handling
  219  */
  220 #define SCTP_MAX_VRF_ID         0
  221 #define SCTP_SIZE_OF_VRF_HASH   3
  222 #define SCTP_IFNAMSIZ           IFNAMSIZ
  223 #define SCTP_DEFAULT_VRFID      0
  224 #define SCTP_VRF_ADDR_HASH_SIZE 16
  225 #define SCTP_VRF_IFN_HASH_SIZE  3
  226 #define SCTP_INIT_VRF_TABLEID(vrf)
  227 
  228 #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
  229 #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)
  230 
  231 /*
  232  * Access to IFN's to help with src-addr-selection
  233  */
  234 /* This could return VOID if the index works but for BSD we provide both. */
  235 #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_rt->rt_ifp
  236 #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_rt->rt_ifp->if_index
  237 #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifp)
  238 
  239 /*
  240  * general memory allocation
  241  */
  242 #define SCTP_MALLOC(var, type, size, name) \
  243     do { \
  244         var = (type)malloc(size, name, M_NOWAIT); \
  245     } while (0)
  246 
  247 #define SCTP_FREE(var, type)    free(var, type)
  248 
  249 #define SCTP_MALLOC_SONAME(var, type, size) \
  250     do { \
  251         var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \
  252     } while (0)
  253 
  254 #define SCTP_FREE_SONAME(var)   free(var, M_SONAME)
  255 
  256 #define SCTP_PROCESS_STRUCT struct proc *
  257 
  258 /*
  259  * zone allocation functions
  260  */
  261 #include <vm/uma.h>
  262 
  263 /* SCTP_ZONE_INIT: initialize the zone */
  264 typedef struct uma_zone *sctp_zone_t;
  265 
  266 #define UMA_ZFLAG_FULL  0x0020
  267 #define SCTP_ZONE_INIT(zone, name, size, number) { \
  268         zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
  269                 UMA_ZFLAG_FULL); \
  270         uma_zone_set_max(zone, number); \
  271 }
  272 
  273 #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
  274 
  275 /* SCTP_ZONE_GET: allocate element from the zone */
  276 #define SCTP_ZONE_GET(zone, type) \
  277         (type *)uma_zalloc(zone, M_NOWAIT);
  278 
  279 /* SCTP_ZONE_FREE: free element from the zone */
  280 #define SCTP_ZONE_FREE(zone, element) \
  281         uma_zfree(zone, element);
  282 
  283 #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
  284 #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
  285 
  286 #define SCTP_M_COPYM    m_copym
  287 
  288 /*
  289  * timers
  290  */
  291 #include <sys/callout.h>
  292 typedef struct callout sctp_os_timer_t;
  293 
  294 
  295 #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
  296 #define SCTP_OS_TIMER_START     callout_reset
  297 #define SCTP_OS_TIMER_STOP      callout_stop
  298 #define SCTP_OS_TIMER_STOP_DRAIN callout_drain
  299 #define SCTP_OS_TIMER_PENDING   callout_pending
  300 #define SCTP_OS_TIMER_ACTIVE    callout_active
  301 #define SCTP_OS_TIMER_DEACTIVATE callout_deactivate
  302 
  303 #define sctp_get_tick_count() (ticks)
  304 
  305 #define SCTP_UNUSED __attribute__((unused))
  306 
  307 /*
  308  * Functions
  309  */
  310 /* Mbuf manipulation and access macros  */
  311 #define SCTP_BUF_LEN(m) (m->m_len)
  312 #define SCTP_BUF_NEXT(m) (m->m_next)
  313 #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
  314 #define SCTP_BUF_RESV_UF(m, size) m->m_data += size
  315 #define SCTP_BUF_AT(m, size) m->m_data + size
  316 #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
  317 #define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
  318 #define SCTP_BUF_TYPE(m) (m->m_type)
  319 #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
  320 #define SCTP_BUF_PREPEND        M_PREPEND
  321 
  322 #define SCTP_ALIGN_TO_END(m, len) if(m->m_flags & M_PKTHDR) { \
  323                                      MH_ALIGN(m, len); \
  324                                   } else if ((m->m_flags & M_EXT) == 0) { \
  325                                      M_ALIGN(m, len); \
  326                                   }
  327 
  328 /* We make it so if you have up to 4 threads
  329  * writting based on the default size of
  330  * the packet log 65 k, that would be
  331  * 4 16k packets before we would hit
  332  * a problem.
  333  */
  334 #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
  335 
  336 /*************************/
  337 /*      MTU              */
  338 /*************************/
  339 #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, af) ((struct ifnet *)ifn)->if_mtu
  340 #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, rt) ((rt != NULL) ? rt->rt_rmx.rmx_mtu : 0)
  341 #define SCTP_GATHER_MTU_FROM_INTFC(sctp_ifn) ((sctp_ifn->ifn_p != NULL) ? ((struct ifnet *)(sctp_ifn->ifn_p))->if_mtu : 0)
  342 #define SCTP_SET_MTU_OF_ROUTE(sa, rt, mtu) do { \
  343                                               if (rt != NULL) \
  344                                                  rt->rt_rmx.rmx_mtu = mtu; \
  345                                            } while(0)
  346 
  347 /* (de-)register interface event notifications */
  348 #define SCTP_REGISTER_INTERFACE(ifhandle, af)
  349 #define SCTP_DEREGISTER_INTERFACE(ifhandle, af)
  350 
  351 
  352 /*************************/
  353 /* These are for logging */
  354 /*************************/
  355 /* return the base ext data pointer */
  356 #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
  357  /* return the refcnt of the data pointer */
  358 #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
  359 /* return any buffer related flags, this is
  360  * used beyond logging for apple only.
  361  */
  362 #define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
  363 
  364 /* For BSD this just accesses the M_PKTHDR length
  365  * so it operates on an mbuf with hdr flag. Other
  366  * O/S's may have seperate packet header and mbuf
  367  * chain pointers.. thus the macro.
  368  */
  369 #define SCTP_HEADER_TO_CHAIN(m) (m)
  370 #define SCTP_DETACH_HEADER_FROM_CHAIN(m)
  371 #define SCTP_HEADER_LEN(m) (m->m_pkthdr.len)
  372 #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
  373 #define SCTP_RELEASE_HEADER(m)
  374 #define SCTP_RELEASE_PKT(m)     sctp_m_freem(m)
  375 #define SCTP_ENABLE_UDP_CSUM(m) do { \
  376                                         m->m_pkthdr.csum_flags = CSUM_UDP; \
  377                                         m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
  378                                 } while (0)
  379 
  380 #define SCTP_GET_PKT_VRFID(m, vrf_id)  ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
  381 
  382 
  383 
  384 /* Attach the chain of data into the sendable packet. */
  385 #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
  386                                                  pak = m; \
  387                                                  pak->m_pkthdr.len = packet_length; \
  388                          } while(0)
  389 
  390 /* Other m_pkthdr type things */
  391 #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
  392 #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
  393 
  394 
  395 /* This converts any input packet header
  396  * into the chain of data holders, for BSD
  397  * its a NOP.
  398  */
  399 
  400 /* Macro's for getting length from V6/V4 header */
  401 #define SCTP_GET_IPV4_LENGTH(iph) (iph->ip_len)
  402 #define SCTP_GET_IPV6_LENGTH(ip6) (ntohs(ip6->ip6_plen))
  403 
  404 /* get the v6 hop limit */
  405 #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)));
  406 
  407 /* is the endpoint v6only? */
  408 #define SCTP_IPV6_V6ONLY(inp)   (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
  409 /* is the socket non-blocking? */
  410 #define SCTP_SO_IS_NBIO(so)     ((so)->so_state & SS_NBIO)
  411 #define SCTP_SET_SO_NBIO(so)    ((so)->so_state |= SS_NBIO)
  412 #define SCTP_CLEAR_SO_NBIO(so)  ((so)->so_state &= ~SS_NBIO)
  413 /* get the socket type */
  414 #define SCTP_SO_TYPE(so)        ((so)->so_type)
  415 /* reserve sb space for a socket */
  416 #define SCTP_SORESERVE(so, send, recv)  soreserve(so, send, recv)
  417 /* wakeup a socket */
  418 #define SCTP_SOWAKEUP(so)       wakeup(&(so)->so_timeo)
  419 /* clear the socket buffer state */
  420 #define SCTP_SB_CLEAR(sb)       \
  421         (sb).sb_cc = 0;         \
  422         (sb).sb_mb = NULL;      \
  423         (sb).sb_mbcnt = 0;
  424 
  425 #define SCTP_SB_LIMIT_RCV(so) so->so_rcv.sb_hiwat
  426 #define SCTP_SB_LIMIT_SND(so) so->so_snd.sb_hiwat
  427 
  428 /*
  429  * routes, output, etc.
  430  */
  431 typedef struct route sctp_route_t;
  432 typedef struct rtentry sctp_rtentry_t;
  433 
  434 #define SCTP_RTALLOC(ro, vrf_id) rtalloc_ign((struct route *)ro, 0UL)
  435 
  436 /* Future zero copy wakeup/send  function */
  437 #define SCTP_ZERO_COPY_EVENT(inp, so)
  438 /* This is re-pulse ourselves for sendbuf */
  439 #define SCTP_ZERO_COPY_SENDQ_EVENT(inp, so)
  440 
  441 /*
  442  * IP output routines
  443  */
  444 #define SCTP_IP_OUTPUT(result, o_pak, ro, stcb, vrf_id) \
  445 { \
  446         int o_flgs = 0; \
  447         if (stcb && stcb->sctp_ep && stcb->sctp_ep->sctp_socket) { \
  448                 o_flgs = IP_RAWOUTPUT | (stcb->sctp_ep->sctp_socket->so_options & SO_DONTROUTE); \
  449         } else { \
  450                 o_flgs = IP_RAWOUTPUT; \
  451         } \
  452         result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \
  453 }
  454 
  455 #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, stcb, vrf_id) \
  456 { \
  457         if (stcb && stcb->sctp_ep) \
  458                 result = ip6_output(o_pak, \
  459                                     ((struct in6pcb *)(stcb->sctp_ep))->in6p_outputopts, \
  460                                     (ro), 0, 0, ifp, NULL); \
  461         else \
  462                 result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL); \
  463 }
  464 
  465 struct mbuf *
  466 sctp_get_mbuf_for_msg(unsigned int space_needed,
  467     int want_header, int how, int allonebuf, int type);
  468 
  469 
  470 /*
  471  * SCTP AUTH
  472  */
  473 #define HAVE_SHA2
  474 
  475 #define SCTP_READ_RANDOM(buf, len)      read_random(buf, len)
  476 
  477 #ifdef USE_SCTP_SHA1
  478 #include <netinet/sctp_sha1.h>
  479 #else
  480 #include <crypto/sha1.h>
  481 /* map standard crypto API names */
  482 #define SHA1_Init       SHA1Init
  483 #define SHA1_Update     SHA1Update
  484 #define SHA1_Final(x,y) SHA1Final((caddr_t)x, y)
  485 #endif
  486 
  487 #if defined(HAVE_SHA2)
  488 #include <crypto/sha2/sha2.h>
  489 #endif
  490 
  491 #include <sys/md5.h>
  492 /* map standard crypto API names */
  493 #define MD5_Init        MD5Init
  494 #define MD5_Update      MD5Update
  495 #define MD5_Final       MD5Final
  496 
  497 #endif
  498 
  499 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
  500 #if defined(INVARIANTS)
  501 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
  502 { \
  503         int32_t oldval; \
  504         oldval = atomic_fetchadd_int(addr, -val); \
  505         if (oldval < val) { \
  506                 panic("Counter goes negative"); \
  507         } \
  508 }
  509 #else
  510 #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
  511 { \
  512         int32_t oldval; \
  513         oldval = atomic_fetchadd_int(addr, -val); \
  514         if (oldval < val) { \
  515                 *addr = 0; \
  516         } \
  517 }
  518 #endif

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