FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_os_bsd.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2006-2007, by Cisco Systems, Inc. All rights reserved.
      * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
      * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions are met:
     *
     * a) Redistributions of source code must retain the above copyright notice,
     *   this list of conditions and the following disclaimer.
     *
     * b) Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in
     *   the documentation and/or other materials provided with the distribution.
     *
     * c) Neither the name of Cisco Systems, Inc. nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     * THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #ifndef _NETINET_SCTP_OS_BSD_H_
    #define _NETINET_SCTP_OS_BSD_H_
    /*
     * includes
     */
    #include "opt_inet6.h"
    #include "opt_inet.h"
    #include "opt_sctp.h"
    
    #include <sys/param.h>
    #include <sys/domain.h>
    #include <sys/eventhandler.h>
    #include <sys/ktr.h>
    #include <sys/systm.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/kernel.h>
    #include <sys/sysctl.h>
    #include <sys/mbuf.h>
    #include <sys/protosw.h>
    #include <sys/socket.h>
    #include <sys/socketvar.h>
    #include <sys/jail.h>
    #include <sys/sysctl.h>
    #include <sys/resourcevar.h>
    #include <sys/uio.h>
    #include <sys/lock.h>
    #include <sys/rwlock.h>
    #include <sys/kthread.h>
    #include <sys/priv.h>
    #include <sys/random.h>
    #include <sys/limits.h>
    #include <sys/queue.h>
    #include <machine/cpu.h>
    
    #include <net/if.h>
    #include <net/if_types.h>
    #include <net/if_var.h>
    #include <net/route.h>
    #include <net/route/nhop.h>
    #include <net/vnet.h>
    
    #include <netinet/in.h>
    #include <netinet/in_systm.h>
    #include <netinet/ip.h>
    #include <netinet/in_fib.h>
    #include <netinet/in_pcb.h>
    #include <netinet/in_var.h>
    #include <netinet/ip_var.h>
    #include <netinet/ip_icmp.h>
    #include <netinet/icmp_var.h>
    
    #ifdef INET6
    #include <netinet/ip6.h>
    #include <netinet6/in6_fib.h>
    #include <netinet6/ip6_var.h>
    #include <netinet6/in6_pcb.h>
    #include <netinet6/nd6.h>
    #include <netinet6/scope6_var.h>
    #endif                          /* INET6 */
    
    #include <netinet/ip_options.h>
   
   #include <crypto/sha1.h>
   #include <crypto/sha2/sha256.h>
   
   /* Declare all the malloc names for all the various mallocs */
   MALLOC_DECLARE(SCTP_M_MAP);
   MALLOC_DECLARE(SCTP_M_STRMI);
   MALLOC_DECLARE(SCTP_M_STRMO);
   MALLOC_DECLARE(SCTP_M_ASC_ADDR);
   MALLOC_DECLARE(SCTP_M_ASC_IT);
   MALLOC_DECLARE(SCTP_M_AUTH_CL);
   MALLOC_DECLARE(SCTP_M_AUTH_KY);
   MALLOC_DECLARE(SCTP_M_AUTH_HL);
   MALLOC_DECLARE(SCTP_M_AUTH_IF);
   MALLOC_DECLARE(SCTP_M_STRESET);
   MALLOC_DECLARE(SCTP_M_CMSG);
   MALLOC_DECLARE(SCTP_M_COPYAL);
   MALLOC_DECLARE(SCTP_M_VRF);
   MALLOC_DECLARE(SCTP_M_IFA);
   MALLOC_DECLARE(SCTP_M_IFN);
   MALLOC_DECLARE(SCTP_M_TIMW);
   MALLOC_DECLARE(SCTP_M_MVRF);
   MALLOC_DECLARE(SCTP_M_ITER);
   MALLOC_DECLARE(SCTP_M_SOCKOPT);
   MALLOC_DECLARE(SCTP_M_MCORE);
   
   #if defined(SCTP_LOCAL_TRACE_BUF)
   
   #define SCTP_GET_CYCLECOUNT get_cyclecount()
   #define SCTP_CTR6 sctp_log_trace
   
   #else
   #define SCTP_CTR6 CTR6
   #endif
   
   /*
    * Macros to expand out globals defined by various modules
    * to either a real global or a virtualized instance of one,
    * depending on whether VIMAGE is defined.
    */
   /* then define the macro(s) that hook into the vimage macros */
   #define MODULE_GLOBAL(__SYMBOL) V_##__SYMBOL
   
   #define V_system_base_info VNET(system_base_info)
   #define SCTP_BASE_INFO(__m) V_system_base_info.sctppcbinfo.__m
   #define SCTP_BASE_STATS V_system_base_info.sctpstat
   #define SCTP_BASE_STAT(__m) V_system_base_info.sctpstat.__m
   #define SCTP_BASE_SYSCTL(__m) V_system_base_info.sctpsysctl.__m
   #define SCTP_BASE_VAR(__m) V_system_base_info.__m
   
   #define SCTP_PRINTF(params...)  printf(params)
   #if defined(SCTP_DEBUG)
   #define SCTPDBG(level, params...)                                       \
   {                                                                       \
           do {                                                            \
                   if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {         \
                           SCTP_PRINTF(params);                            \
                   }                                                       \
           } while (0);                                                    \
   }
   #define SCTPDBG_ADDR(level, addr)                                       \
   {                                                                       \
           do {                                                            \
                   if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) {         \
                           sctp_print_address(addr);                       \
                   }                                                       \
           } while (0);                                                    \
   }
   #else
   #define SCTPDBG(level, params...)
   #define SCTPDBG_ADDR(level, addr)
   #endif
   
   #ifdef SCTP_LTRACE_CHUNKS
   #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)
   #else
   #define SCTP_LTRACE_CHK(a, b, c, d)
   #endif
   
   #ifdef SCTP_LTRACE_ERRORS
   #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) \
           if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
                   SCTP_PRINTF("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
                               m, inp, stcb, net, file, __LINE__, err);
   #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) \
           if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
                   SCTP_PRINTF("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
                               inp, stcb, net, file, __LINE__, err);
   #else
   #define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
   #define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
   #endif
   
   /*
    * Local address and interface list handling
    */
   #define SCTP_MAX_VRF_ID         0
   #define SCTP_SIZE_OF_VRF_HASH   3
   #define SCTP_IFNAMSIZ           IFNAMSIZ
   #define SCTP_DEFAULT_VRFID      0
   #define SCTP_VRF_ADDR_HASH_SIZE 16
   #define SCTP_VRF_IFN_HASH_SIZE  3
   #define SCTP_INIT_VRF_TABLEID(vrf)
   
   #define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
   #define SCTP_ROUTE_IS_REAL_LOOP(ro) ((ro)->ro_nh && (ro)->ro_nh->nh_ifa && (ro)->ro_nh->nh_ifa->ifa_ifp && (ro)->ro_nh->nh_ifa->ifa_ifp->if_type == IFT_LOOP)
   
   /*
    * Access to IFN's to help with src-addr-selection
    */
   /* This could return VOID if the index works but for BSD we provide both. */
   #define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_nh->nh_ifp
   #define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_nh->nh_ifp->if_index
   #define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_nh && (ro)->ro_nh->nh_ifp)
   
   /*
    * general memory allocation
    */
   #define SCTP_MALLOC(var, type, size, name) \
           do { \
                   var = (type)malloc(size, name, M_NOWAIT); \
           } while (0)
   
   #define SCTP_FREE(var, type)    free(var, type)
   
   #define SCTP_MALLOC_SONAME(var, type, size) \
           do { \
                   var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \
           } while (0)
   
   #define SCTP_FREE_SONAME(var)   free(var, M_SONAME)
   
   #define SCTP_PROCESS_STRUCT struct proc *
   
   /*
    * zone allocation functions
    */
   #include <vm/uma.h>
   
   /* SCTP_ZONE_INIT: initialize the zone */
   typedef struct uma_zone *sctp_zone_t;
   #define SCTP_ZONE_INIT(zone, name, size, number) { \
           zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
                   0); \
           uma_zone_set_max(zone, number); \
   }
   
   #define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
   
   /* SCTP_ZONE_GET: allocate element from the zone */
   #define SCTP_ZONE_GET(zone, type) \
           (type *)uma_zalloc(zone, M_NOWAIT);
   
   /* SCTP_ZONE_FREE: free element from the zone */
   #define SCTP_ZONE_FREE(zone, element) \
           uma_zfree(zone, element);
   
   #define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
   #define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
   
   #define SCTP_M_COPYM    m_copym
   
   /*
    * timers
    */
   #include <sys/callout.h>
   typedef struct callout sctp_os_timer_t;
   
   #define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
   /*
    * NOTE: The next two shouldn't be called directly outside of sctp_timer_start()
    * and sctp_timer_stop(), since they don't handle incrementing/decrementing
    * relevant reference counts.
    */
   #define SCTP_OS_TIMER_START             callout_reset
   #define SCTP_OS_TIMER_STOP              callout_stop
   #define SCTP_OS_TIMER_STOP_DRAIN        callout_drain
   #define SCTP_OS_TIMER_PENDING           callout_pending
   #define SCTP_OS_TIMER_ACTIVE            callout_active
   #define SCTP_OS_TIMER_DEACTIVATE        callout_deactivate
   
   #define sctp_get_tick_count() (ticks)
   
   #define SCTP_UNUSED __attribute__((unused))
   
   /*
    * Functions
    */
   /* Mbuf manipulation and access macros  */
   #define SCTP_BUF_LEN(m) (m->m_len)
   #define SCTP_BUF_NEXT(m) (m->m_next)
   #define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
   #define SCTP_BUF_RESV_UF(m, size) m->m_data += size
   #define SCTP_BUF_AT(m, size) m->m_data + size
   #define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
   #define SCTP_BUF_SIZE M_SIZE
   #define SCTP_BUF_TYPE(m) (m->m_type)
   #define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
   #define SCTP_BUF_PREPEND        M_PREPEND
   
   #define SCTP_ALIGN_TO_END(m, len) M_ALIGN(m, len)
   
   #define SCTP_SNPRINTF(...) snprintf(__VA_ARGS__)
   
   /* We make it so if you have up to 4 threads
    * writing based on the default size of
    * the packet log 65 k, that would be
    * 4 16k packets before we would hit
    * a problem.
    */
   #define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
   
   /*************************/
   /*      MTU              */
   /*************************/
   #define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index) ((ifn != NULL) ? ((struct ifnet *)ifn)->if_mtu : 0)
   #define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, nh) ((uint32_t)((nh != NULL) ? nh->nh_mtu : 0))
   
   /*************************/
   /* These are for logging */
   /*************************/
   /* return the base ext data pointer */
   #define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
    /* return the refcnt of the data pointer */
   #define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ext_cnt)
   /* return any buffer related flags, this is
    * used beyond logging for apple only.
    */
   #define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
   
   /* For BSD this just accesses the M_PKTHDR length
    * so it operates on an mbuf with hdr flag. Other
    * O/S's may have separate packet header and mbuf
    * chain pointers.. thus the macro.
    */
   #define SCTP_HEADER_TO_CHAIN(m) (m)
   #define SCTP_DETACH_HEADER_FROM_CHAIN(m)
   #define SCTP_HEADER_LEN(m) ((m)->m_pkthdr.len)
   #define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
   #define SCTP_RELEASE_HEADER(m)
   #define SCTP_RELEASE_PKT(m)     sctp_m_freem(m)
   #define SCTP_ENABLE_UDP_CSUM(m) do { \
                                           m->m_pkthdr.csum_flags = CSUM_UDP; \
                                           m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
                                   } while (0)
   
   #define SCTP_GET_PKT_VRFID(m, vrf_id)  ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
   
   /* Attach the chain of data into the sendable packet. */
   #define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
                                                    pak = m; \
                                                    pak->m_pkthdr.len = packet_length; \
                            } while(0)
   
   /* Other m_pkthdr type things */
   #define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
   #define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
   
   /* This converts any input packet header
    * into the chain of data holders, for BSD
    * its a NOP.
    */
   
   /* get the v6 hop limit */
   #define SCTP_GET_HLIM(inp, ro)  in6_selecthlim(&inp->ip_inp.inp, (ro ? (ro->ro_nh ? (ro->ro_nh->nh_ifp) : (NULL)) : (NULL)));
   
   /* is the endpoint v6only? */
   #define SCTP_IPV6_V6ONLY(sctp_inpcb)    ((sctp_inpcb)->ip_inp.inp.inp_flags & IN6P_IPV6_V6ONLY)
   /* is the socket non-blocking? */
   #define SCTP_SO_IS_NBIO(so)     ((so)->so_state & SS_NBIO)
   #define SCTP_SET_SO_NBIO(so)    ((so)->so_state |= SS_NBIO)
   #define SCTP_CLEAR_SO_NBIO(so)  ((so)->so_state &= ~SS_NBIO)
   /* get the socket type */
   #define SCTP_SO_TYPE(so)        ((so)->so_type)
   /* Use a macro for renaming sb_cc to sb_acc.
    * Initially sb_ccc was used, but this broke select() when used
    * with SCTP sockets.
    */
   #define sb_cc sb_acc
   /* reserve sb space for a socket */
   #define SCTP_SORESERVE(so, send, recv)  soreserve(so, send, recv)
   /* wakeup a socket */
   #define SCTP_SOWAKEUP(so)       wakeup(&(so)->so_timeo)
   /* number of bytes ready to read */
   #define SCTP_SBAVAIL(sb)        sbavail(sb)
   /* clear the socket buffer state */
   #define SCTP_SB_CLEAR(sb)       \
           (sb).sb_cc = 0;         \
           (sb).sb_mb = NULL;      \
           (sb).sb_mbcnt = 0;
   
   #define SCTP_SB_LIMIT_RCV(so) (SOLISTENING(so) ? so->sol_sbrcv_hiwat : so->so_rcv.sb_hiwat)
   #define SCTP_SB_LIMIT_SND(so) (SOLISTENING(so) ? so->sol_sbsnd_hiwat : so->so_snd.sb_hiwat)
   
   /*
    * routes, output, etc.
    */
   typedef struct route sctp_route_t;
   
   #define SCTP_RTALLOC(ro, vrf_id, fibnum) \
   { \
           if ((ro)->ro_nh == NULL) { \
                   (ro)->ro_nh = rib_lookup(fibnum, &(ro)->ro_dst, NHR_REF, 0); \
           } \
   }
   
   /*
    * SCTP protocol specific mbuf flags.
    */
   #define M_NOTIFICATION          M_PROTO1        /* SCTP notification */
   
   /*
    * IP output routines
    */
   #define SCTP_IP_OUTPUT(result, o_pak, ro, _inp, vrf_id)                      \
   {                                                                            \
           struct sctp_inpcb *local_inp = _inp;                                 \
           int o_flgs = IP_RAWOUTPUT;                                           \
                                                                                \
           m_clrprotoflags(o_pak);                                              \
           if ((local_inp != NULL) && (local_inp->sctp_socket != NULL)) {       \
                   o_flgs |= local_inp->sctp_socket->so_options & SO_DONTROUTE; \
           }                                                                    \
           result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL);                \
   }
   
   #define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, _inp, vrf_id)                \
   {                                                                            \
           struct sctp_inpcb *local_inp = _inp;                                 \
                                                                                \
           m_clrprotoflags(o_pak);                                              \
           if (local_inp != NULL) {                                             \
                   INP_RLOCK(&local_inp->ip_inp.inp);                           \
                   result = ip6_output(o_pak,                                   \
                                       local_inp->ip_inp.inp.in6p_outputopts,   \
                                       (ro), 0, 0, ifp, NULL);                  \
                   INP_RUNLOCK(&local_inp->ip_inp.inp);                         \
           } else {                                                             \
                   result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL);     \
           }                                                                    \
   }
   
   struct mbuf *
   sctp_get_mbuf_for_msg(unsigned int space_needed,
       int want_header, int how, int allonebuf, int type);
   
   /*
    * SCTP AUTH
    */
   #define SCTP_READ_RANDOM(buf, len)      arc4rand(buf, len, 0)
   
   /* map standard crypto API names */
   #define SCTP_SHA1_CTX           SHA1_CTX
   #define SCTP_SHA1_INIT          SHA1Init
   #define SCTP_SHA1_UPDATE        SHA1Update
   #define SCTP_SHA1_FINAL(x,y)    SHA1Final((caddr_t)x, y)
   
   #define SCTP_SHA256_CTX         SHA256_CTX
   #define SCTP_SHA256_INIT        SHA256_Init
   #define SCTP_SHA256_UPDATE      SHA256_Update
   #define SCTP_SHA256_FINAL(x,y)  SHA256_Final((caddr_t)x, y)
   
   #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
   #if defined(INVARIANTS)
   #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
   { \
           int32_t oldval; \
           oldval = atomic_fetchadd_int(addr, -val); \
           if (oldval < val) { \
                   panic("Counter goes negative"); \
           } \
   }
   #else
   #define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
   { \
           int32_t oldval; \
           oldval = atomic_fetchadd_int(addr, -val); \
           if (oldval < val) { \
                   *addr = 0; \
           } \
   }
   #endif
   
   #define SCTP_IS_LISTENING(inp) ((inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) != 0)
   
   int sctp_syscalls_init(void);
   int sctp_syscalls_uninit(void);
   
   #endif

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