The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/netinet6/sctp6_usrreq.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */
    2 /* $NetBSD: sctp6_usrreq.c,v 1.24 2022/11/04 09:01:53 ozaki-r Exp $ */
    3 
    4 /*
    5  * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Cisco Systems, Inc.
   19  * 4. Neither the name of the project nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 #include <sys/cdefs.h>
   36 __KERNEL_RCSID(0, "$NetBSD: sctp6_usrreq.c,v 1.24 2022/11/04 09:01:53 ozaki-r Exp $");
   37 
   38 #ifdef _KERNEL_OPT
   39 #include "opt_inet.h"
   40 #include "opt_ipsec.h"
   41 #include "opt_sctp.h"
   42 #include "opt_net_mpsafe.h"
   43 #endif /* _KERNEL_OPT */
   44 
   45 #include <sys/param.h>
   46 #include <sys/kernel.h>
   47 #include <sys/mbuf.h>
   48 #include <sys/domain.h>
   49 #include <sys/protosw.h>
   50 #include <sys/socket.h>
   51 #include <sys/malloc.h>
   52 #include <sys/socketvar.h>
   53 #include <sys/sysctl.h>
   54 #include <sys/errno.h>
   55 #include <sys/stat.h>
   56 #include <sys/systm.h>
   57 #include <sys/syslog.h>
   58 #include <sys/proc.h>
   59 #include <net/if.h>
   60 #include <net/route.h>
   61 #include <net/if_types.h>
   62 #include <netinet/in.h>
   63 #include <netinet/in_systm.h>
   64 #include <netinet/ip.h>
   65 #include <netinet/in_pcb.h>
   66 #include <netinet/in_var.h>
   67 #include <netinet/ip_var.h>
   68 #include <netinet/sctp_pcb.h>
   69 #include <netinet/sctp_header.h>
   70 #include <netinet/sctp_var.h>
   71 #include <netinet/sctputil.h>
   72 #include <netinet/sctp_output.h>
   73 #include <netinet/sctp_input.h>
   74 #include <netinet/sctp_asconf.h>
   75 #include <netinet/sctp_route.h>
   76 #include <netinet6/ip6_var.h>
   77 #include <netinet6/scope6_var.h>
   78 #include <netinet/ip6.h>
   79 #include <netinet6/in6_pcb.h>
   80 #include <netinet/icmp6.h>
   81 #include <netinet6/sctp6_var.h>
   82 #include <netinet6/ip6protosw.h>
   83 
   84 #ifdef IPSEC
   85 #include <netipsec/ipsec.h>
   86 #include <netipsec/ipsec6.h>
   87 #endif /*IPSEC*/
   88 
   89 #if defined(NFAITH) && NFAITH > 0
   90 #include <net/if_faith.h>
   91 #endif
   92 
   93 #if defined(HAVE_NRL_INPCB) || defined(__FreeBSD__)
   94 #ifndef in6pcb
   95 #define in6pcb          inpcb
   96 #endif
   97 #ifndef sotoin6pcb
   98 #define sotoin6pcb      sotoinpcb
   99 #endif
  100 #endif
  101 
  102 #ifdef SCTP_DEBUG
  103 extern u_int32_t sctp_debug_on;
  104 #endif
  105 
  106 static  int sctp6_detach(struct socket *so);
  107 
  108 extern int sctp_no_csum_on_loopback;
  109 
  110 int
  111 sctp6_input(struct mbuf **mp, int *offp, int proto)
  112 {
  113         struct mbuf *m = *mp;
  114         struct ip6_hdr *ip6;
  115         struct sctphdr *sh;
  116         struct sctp_inpcb *in6p = NULL;
  117         struct sctp_nets *net;
  118         int refcount_up = 0;
  119         u_int32_t check, calc_check;
  120         struct inpcb *in6p_ip;
  121         struct sctp_chunkhdr *ch;
  122         struct mbuf *opts = NULL;
  123         int length, mlen, offset, iphlen;
  124         u_int8_t ecn_bits;
  125         struct sctp_tcb *stcb = NULL;
  126         int off = *offp;
  127         int s;
  128 
  129         ip6 = mtod(m, struct ip6_hdr *);
  130         /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */
  131         IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch));
  132         if (sh == NULL) {
  133                 sctp_pegs[SCTP_HDR_DROPS]++;
  134                 return IPPROTO_DONE;
  135         }
  136         ch = (struct sctp_chunkhdr *)((vaddr_t)sh + sizeof(struct sctphdr));
  137 
  138         iphlen = off;
  139         offset = iphlen + sizeof(*sh) + sizeof(*ch);
  140 
  141 #if defined(NFAITH) && NFAITH > 0
  142         if (faithprefix(&ip6->ip6_dst))
  143                 goto bad;
  144 #endif /* NFAITH defined and > 0 */
  145         sctp_pegs[SCTP_INPKTS]++;
  146 #ifdef SCTP_DEBUG
  147         if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
  148                 printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, m->m_pkthdr.len);
  149         }
  150 #endif
  151         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
  152                 /* No multi-cast support in SCTP */
  153                 sctp_pegs[SCTP_IN_MCAST]++;
  154                 goto bad;
  155         }
  156         /* destination port of 0 is illegal, based on RFC2960. */
  157         if (sh->dest_port == 0)
  158                 goto bad;
  159         if ((sctp_no_csum_on_loopback == 0) ||
  160            (m_get_rcvif_NOMPSAFE(m) == NULL) ||
  161            (m_get_rcvif_NOMPSAFE(m)->if_type != IFT_LOOP)) {
  162                 /* we do NOT validate things from the loopback if the
  163                  * sysctl is set to 1.
  164                  */
  165                 check = sh->checksum;           /* save incoming checksum */
  166                 if ((check == 0) && (sctp_no_csum_on_loopback)) {
  167                         /* special hook for where we got a local address
  168                          * somehow routed across a non IFT_LOOP type interface
  169                          */
  170                         if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst))
  171                                 goto sctp_skip_csum;
  172                 }
  173                 sh->checksum = 0;               /* prepare for calc */
  174                 calc_check = sctp_calculate_sum(m, &mlen, iphlen);
  175                 if (calc_check != check) {
  176 #ifdef SCTP_DEBUG
  177                         if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
  178                                 printf("Bad CSUM on SCTP packet calc_check:%x check:%x  m:%p mlen:%d iphlen:%d\n",
  179                                        calc_check, check, m,
  180                                        mlen, iphlen);
  181                         }
  182 #endif
  183                         stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch),
  184                                                          sh, ch, &in6p, &net);
  185                         /* in6p's ref-count increased && stcb locked */
  186                         if ((in6p) && (stcb)) {
  187                                 sctp_send_packet_dropped(stcb, net, m, iphlen, 1);
  188                                 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2);
  189                         }  else if ((in6p != NULL) && (stcb == NULL)) {
  190                                 refcount_up = 1;
  191                         }
  192                         sctp_pegs[SCTP_BAD_CSUM]++;
  193                         goto bad;
  194                 }
  195                 sh->checksum = calc_check;
  196         } else {
  197 sctp_skip_csum:
  198                 mlen = m->m_pkthdr.len;
  199         }
  200         net = NULL;
  201         /*
  202          * Locate pcb and tcb for datagram
  203          * sctp_findassociation_addr() wants IP/SCTP/first chunk header...
  204          */
  205 #ifdef SCTP_DEBUG
  206         if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
  207                 printf("V6 Find the association\n");
  208         }
  209 #endif
  210         stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch),
  211             sh, ch, &in6p, &net);
  212         /* in6p's ref-count increased */
  213         if (in6p == NULL) {
  214                 struct sctp_init_chunk *init_chk, chunk_buf;
  215 
  216                 sctp_pegs[SCTP_NOPORTS]++;
  217                 if (ch->chunk_type == SCTP_INITIATION) {
  218                         /* we do a trick here to get the INIT tag,
  219                          * dig in and get the tag from the INIT and
  220                          * put it in the common header.
  221                          */
  222                         init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
  223                             iphlen + sizeof(*sh), sizeof(*init_chk),
  224                             (u_int8_t *)&chunk_buf);
  225                         sh->v_tag = init_chk->init.initiate_tag;
  226                 }
  227                 sctp_send_abort(m, iphlen, sh, 0, NULL);
  228                 goto bad;
  229         } else if (stcb == NULL) {
  230                 refcount_up = 1;
  231         }
  232         in6p_ip = (struct inpcb *)in6p;
  233 #ifdef IPSEC
  234         /*
  235          * Check AH/ESP integrity.
  236          */
  237         if (ipsec_used && ipsec_in_reject(m, in6p_ip)) {
  238 /* XXX */
  239 #if 0
  240                 /* FIX ME: need to find right stat */
  241                 ipsec6stat.in_polvio++;
  242 #endif
  243                 goto bad;
  244         }
  245 #endif /*IPSEC*/
  246 
  247         /*
  248          * Construct sockaddr format source address.
  249          * Stuff source address and datagram in user buffer.
  250          */
  251         if ((in6p->ip_inp.inp.inp_flags & INP_CONTROLOPTS)
  252 #ifndef __OpenBSD__
  253             || (in6p->sctp_socket->so_options & SO_TIMESTAMP)
  254 #endif
  255             ) {
  256 #if defined(__FreeBSD__) || defined(__APPLE__)
  257 #if (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version < 501113) || defined(__APPLE__)
  258                 ip6_savecontrol(in6p_ip, &opts, ip6, m);
  259 #elif __FreeBSD_version >= 440000 || (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version >= 501113)
  260                 ip6_savecontrol(in6p_ip, m, &opts);
  261 #else
  262                 ip6_savecontrol(in6p_ip, m, &opts, NULL);
  263 #endif
  264 #elif defined(__NetBSD__)
  265                 ip6_savecontrol(in6p_ip, &opts, ip6, m);
  266 #else
  267                 ip6_savecontrol(in6p_ip, m, &opts);
  268 #endif
  269         }
  270 
  271         /*
  272          * CONTROL chunk processing
  273          */
  274         length = ntohs(ip6->ip6_plen) + iphlen;
  275         offset -= sizeof(*ch);
  276         ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
  277         s = splsoftnet();
  278         (void)sctp_common_input_processing(&m, iphlen, offset, length, sh, ch,
  279             in6p, stcb, net, ecn_bits);
  280         /* inp's ref-count reduced && stcb unlocked */
  281         splx(s);
  282         /* XXX this stuff below gets moved to appropriate parts later... */
  283         if (m)
  284                 m_freem(m);
  285         if (opts)
  286                 m_freem(opts);
  287 
  288         if ((in6p) && refcount_up){
  289                 /* reduce ref-count */
  290                 SCTP_INP_WLOCK(in6p);
  291                 SCTP_INP_DECR_REF(in6p);
  292                 SCTP_INP_WUNLOCK(in6p);
  293         }
  294 
  295         return IPPROTO_DONE;
  296 
  297 bad:
  298         if (stcb) {
  299                 SCTP_TCB_UNLOCK(stcb);
  300         }
  301 
  302         if ((in6p) && refcount_up){
  303                 /* reduce ref-count */
  304                 SCTP_INP_WLOCK(in6p);
  305                 SCTP_INP_DECR_REF(in6p);
  306                 SCTP_INP_WUNLOCK(in6p);
  307         }
  308         if (m) {
  309                 m_freem(m);
  310         }
  311         if (opts) {
  312                 m_freem(opts);
  313         }
  314         return IPPROTO_DONE;
  315 }
  316 
  317 
  318 static void
  319 sctp6_notify_mbuf(struct sctp_inpcb *inp,
  320                   struct icmp6_hdr *icmp6,
  321                   struct sctphdr *sh,
  322                   struct sctp_tcb *stcb,
  323                   struct sctp_nets *net)
  324 {
  325         unsigned int nxtsz;
  326 
  327         if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
  328             (icmp6 == NULL) || (sh == NULL)) {
  329                 goto out;
  330         }
  331 
  332         /* First do we even look at it? */
  333         if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag))
  334                 goto out;
  335 
  336         if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) {
  337                 /* not PACKET TO BIG */
  338                 goto out;
  339         }
  340         /*
  341          * ok we need to look closely. We could even get smarter and
  342          * look at anyone that we sent to in case we get a different
  343          * ICMP that tells us there is no way to reach a host, but for
  344          * this impl, all we care about is MTU discovery.
  345          */
  346         nxtsz = ntohl(icmp6->icmp6_mtu);
  347         /* Stop any PMTU timer */
  348         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
  349 
  350         /* Adjust destination size limit */
  351         if (net->mtu > nxtsz) {
  352                 net->mtu = nxtsz;
  353         }
  354         /* now what about the ep? */
  355         if (stcb->asoc.smallest_mtu > nxtsz) {
  356                 struct sctp_tmit_chunk *chk;
  357                 struct sctp_stream_out *strm;
  358                 /* Adjust that too */
  359                 stcb->asoc.smallest_mtu = nxtsz;
  360                 /* now off to subtract IP_DF flag if needed */
  361 
  362                 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
  363                         if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
  364                                 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
  365                         }
  366                 }
  367                 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
  368                         if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
  369                                 /*
  370                                  * For this guy we also mark for immediate
  371                                  * resend since we sent to big of chunk
  372                                  */
  373                                 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
  374                                 if (chk->sent != SCTP_DATAGRAM_RESEND)
  375                                         stcb->asoc.sent_queue_retran_cnt++;
  376                                 chk->sent = SCTP_DATAGRAM_RESEND;
  377                                 chk->rec.data.doing_fast_retransmit = 0;
  378 
  379                                 chk->sent = SCTP_DATAGRAM_RESEND;
  380                                 /* Clear any time so NO RTT is being done */
  381                                 chk->sent_rcv_time.tv_sec = 0;
  382                                 chk->sent_rcv_time.tv_usec = 0;
  383                                 stcb->asoc.total_flight -= chk->send_size;
  384                                 net->flight_size -= chk->send_size;
  385                         }
  386                 }
  387                 TAILQ_FOREACH(strm, &stcb->asoc.out_wheel, next_spoke) {
  388                         TAILQ_FOREACH(chk, &strm->outqueue, sctp_next) {
  389                                 if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
  390                                         chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
  391                                 }
  392                         }
  393                 }
  394         }
  395         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
  396 out:
  397         if (inp) {
  398                 /* reduce inp's ref-count */
  399                 SCTP_INP_WLOCK(inp);
  400                 SCTP_INP_DECR_REF(inp);
  401                 SCTP_INP_WUNLOCK(inp);
  402         }
  403         if (stcb) {
  404                 SCTP_TCB_UNLOCK(stcb);
  405         }
  406 }
  407 
  408 
  409 void *
  410 sctp6_ctlinput(int cmd, const struct sockaddr *pktdst, void *d)
  411 {
  412         struct sctphdr sh;
  413         struct ip6ctlparam *ip6cp = NULL;
  414         int s, cm;
  415 
  416         if (pktdst->sa_family != AF_INET6 ||
  417             pktdst->sa_len != sizeof(struct sockaddr_in6))
  418                 return NULL;
  419 
  420         if ((unsigned)cmd >= PRC_NCMDS)
  421                 return NULL;
  422         if (PRC_IS_REDIRECT(cmd)) {
  423                 d = NULL;
  424         } else if (inet6ctlerrmap[cmd] == 0) {
  425                 return NULL;
  426         }
  427 
  428         /* if the parameter is from icmp6, decode it. */
  429         if (d != NULL) {
  430                 ip6cp = (struct ip6ctlparam *)d;
  431         } else {
  432                 ip6cp = (struct ip6ctlparam *)NULL;
  433         }
  434 
  435         if (ip6cp) {
  436                 /*
  437                  * XXX: We assume that when IPV6 is non NULL,
  438                  * M and OFF are valid.
  439                  */
  440                 /* check if we can safely examine src and dst ports */
  441                 struct sctp_inpcb *inp;
  442                 struct sctp_tcb *stcb;
  443                 struct sctp_nets *net;
  444                 struct sockaddr_in6 final;
  445 
  446                 if (ip6cp->ip6c_m == NULL ||
  447                     (size_t)ip6cp->ip6c_m->m_pkthdr.len < (ip6cp->ip6c_off + sizeof(sh)))
  448                         return NULL;
  449 
  450                 memset(&sh, 0, sizeof(sh));
  451                 memset(&final, 0, sizeof(final));
  452                 inp = NULL;
  453                 net = NULL;
  454                 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh),
  455                     (void *)&sh);
  456                 ip6cp->ip6c_src->sin6_port = sh.src_port;
  457                 final.sin6_len = sizeof(final);
  458                 final.sin6_family = AF_INET6;
  459                 final.sin6_addr = ((const struct sockaddr_in6 *)pktdst)->sin6_addr;
  460                 final.sin6_port = sh.dest_port;
  461                 s = splsoftnet();
  462                 stcb = sctp_findassociation_addr_sa(sin6tosa(ip6cp->ip6c_src),
  463                                                     sin6tosa(&final),
  464                                                     &inp, &net, 1);
  465                 /* inp's ref-count increased && stcb locked */
  466                 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) {
  467                         if (cmd == PRC_MSGSIZE) {
  468                                 sctp6_notify_mbuf(inp,
  469                                                   ip6cp->ip6c_icmp6,
  470                                                   &sh,
  471                                                   stcb,
  472                                                   net);
  473                                 /* inp's ref-count reduced && stcb unlocked */
  474                         } else {
  475                                 if (cmd == PRC_HOSTDEAD) {
  476                                         cm = EHOSTUNREACH;
  477                                 } else {
  478                                         cm = inet6ctlerrmap[cmd];
  479                                 }
  480                                 sctp_notify(inp, cm, &sh, sin6tosa(&final),
  481                                             stcb, net);
  482                                 /* inp's ref-count reduced && stcb unlocked */
  483                         }
  484                 } else {
  485                         if (PRC_IS_REDIRECT(cmd) && inp) {
  486                                 in6pcb_rtchange((struct inpcb *)inp, inet6ctlerrmap[cmd]);
  487                         }
  488                         if (inp) {
  489                                 /* reduce inp's ref-count */
  490                                 SCTP_INP_WLOCK(inp);
  491                                 SCTP_INP_DECR_REF(inp);
  492                                 SCTP_INP_WUNLOCK(inp);
  493                         }
  494                         if (stcb) {
  495                                 SCTP_TCB_UNLOCK(stcb);
  496                         }
  497                 }
  498                 splx(s);
  499         }
  500         return NULL;
  501 }
  502 
  503 /*
  504  * this routine can probably be collasped into the one in sctp_userreq.c
  505  * since they do the same thing and now we lookup with a sockaddr
  506  */
  507 #ifdef __FreeBSD__
  508 static int
  509 sctp6_getcred(SYSCTL_HANDLER_ARGS)
  510 {
  511         struct sockaddr_in6 addrs[2];
  512         struct sctp_inpcb *inp;
  513         struct sctp_nets *net;
  514         struct sctp_tcb *stcb;
  515         int error, s;
  516 
  517 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
  518         error = suser(req->td);
  519 #else
  520         error = suser(req->p);
  521 #endif
  522         if (error)
  523                 return (error);
  524 
  525         if (req->newlen != sizeof(addrs))
  526                 return (EINVAL);
  527         if (req->oldlen != sizeof(struct ucred))
  528                 return (EINVAL);
  529         error = SYSCTL_IN(req, addrs, sizeof(addrs));
  530         if (error)
  531                 return (error);
  532         s = splsoftnet();
  533 
  534         stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]),
  535                                            sin6tosa(&addrs[1]),
  536                                            &inp, &net, 1);
  537         if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
  538                 error = ENOENT;
  539                 if (inp) {
  540                         SCTP_INP_WLOCK(inp);
  541                         SCTP_INP_DECR_REF(inp);
  542                         SCTP_INP_WUNLOCK(inp);
  543                 }
  544                 goto out;
  545         }
  546         error = SYSCTL_OUT(req, inp->sctp_socket->so_cred,
  547                            sizeof(struct ucred));
  548 
  549         SCTP_TCB_UNLOCK (stcb);
  550  out:
  551         splx(s);
  552         return (error);
  553 }
  554 
  555 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
  556             0, 0,
  557             sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
  558 
  559 #endif
  560 
  561 /* This is the same as the sctp_abort() could be made common */
  562 static int
  563 sctp6_abort(struct socket *so)
  564 {
  565         int s;
  566         struct sctp_inpcb *inp;
  567 
  568         KASSERT(solocked(so));
  569 
  570         s = splsoftnet();
  571         inp = (struct sctp_inpcb *)so->so_pcb;
  572         if (inp == 0)
  573                 return EINVAL;  /* ??? possible? panic instead? */
  574         soisdisconnected(so);
  575         sctp_inpcb_free(inp, 1);
  576         splx(s);
  577         return 0;
  578 }
  579 
  580 static int
  581 sctp6_attach(struct socket *so, int proto)
  582 {
  583         struct in6pcb *inp6;
  584         int error;
  585         struct sctp_inpcb *inp;
  586 
  587         sosetlock(so);
  588         inp = (struct sctp_inpcb *)so->so_pcb;
  589         if (inp != NULL)
  590                 return EINVAL;
  591 
  592         if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
  593                 error = soreserve(so, sctp_sendspace, sctp_recvspace);
  594                 if (error)
  595                         return error;
  596         }
  597         error = sctp_inpcb_alloc(so);
  598         if (error)
  599                 return error;
  600         inp = (struct sctp_inpcb *)so->so_pcb;
  601         inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6;     /* I'm v6! */
  602         inp6 = (struct in6pcb *)inp;
  603 
  604         inp->inp_vflag |=  INP_IPV6;
  605         if (ip6_v6only) {
  606                 inp6->in6p_flags |= IN6P_IPV6_V6ONLY;
  607         }
  608         so->so_send = sctp_sosend;
  609 
  610 #ifdef IPSEC
  611         inp6->in6p_af = proto;
  612 #endif
  613         inp6->in6p_hops = -1;           /* use kernel default */
  614         inp6->in6p_cksum = -1;  /* just to be sure */
  615 #ifdef INET
  616         /*
  617          * XXX: ugly!!
  618          * IPv4 TTL initialization is necessary for an IPv6 socket as well,
  619          * because the socket may be bound to an IPv6 wildcard address,
  620          * which may match an IPv4-mapped IPv6 address.
  621          */
  622         inp->inp_ip_ttl = ip_defttl;
  623 #endif
  624         /*
  625          * Hmm what about the IPSEC stuff that is missing here but
  626          * in sctp_attach()?
  627          */
  628         return 0;
  629 }
  630 
  631 static int
  632 sctp6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
  633 {
  634         struct sctp_inpcb *inp;
  635         struct in6pcb *inp6;
  636         int error;
  637 
  638         KASSERT(solocked(so));
  639 
  640         inp = (struct sctp_inpcb *)so->so_pcb;
  641         if (inp == 0)
  642                 return EINVAL;
  643 
  644         inp6 = (struct in6pcb *)inp;
  645         inp->inp_vflag &= ~INP_IPV4;
  646         inp->inp_vflag |= INP_IPV6;
  647 
  648         if (nam != NULL && (inp6->in6p_flags & IN6P_IPV6_V6ONLY) == 0) {
  649                 if (nam->sa_family == AF_INET) {
  650                         /* binding v4 addr to v6 socket, so reset flags */
  651                         inp->inp_vflag |= INP_IPV4;
  652                         inp->inp_vflag &= ~INP_IPV6;
  653                 } else {
  654                         struct sockaddr_in6 *sin6_p;
  655                         sin6_p = (struct sockaddr_in6 *)nam;
  656 
  657                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
  658                           inp->inp_vflag |= INP_IPV4;
  659                         }
  660                         else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
  661                                 struct sockaddr_in sin;
  662                                 in6_sin6_2_sin(&sin, sin6_p);
  663                                 inp->inp_vflag |= INP_IPV4;
  664                                 inp->inp_vflag &= ~INP_IPV6;
  665                                 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, l);
  666                                 return error;
  667                         }
  668                 }
  669         } else if (nam != NULL) {
  670                 /* IPV6_V6ONLY socket */
  671                 if (nam->sa_family == AF_INET) {
  672                         /* can't bind v4 addr to v6 only socket! */
  673                         return EINVAL;
  674                 } else {
  675                         struct sockaddr_in6 *sin6_p;
  676                         sin6_p = (struct sockaddr_in6 *)nam;
  677 
  678                         if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr))
  679                                 /* can't bind v4-mapped addrs either! */
  680                                 /* NOTE: we don't support SIIT */
  681                                 return EINVAL;
  682                 }
  683         }
  684         error = sctp_inpcb_bind(so, nam, l);
  685         return error;
  686 }
  687 
  688 /*This could be made common with sctp_detach() since they are identical */
  689 static int
  690 sctp6_detach(struct socket *so)
  691 {
  692         struct sctp_inpcb *inp;
  693 
  694         inp = (struct sctp_inpcb *)so->so_pcb;
  695         if (inp == 0)
  696                 return EINVAL;
  697 
  698         if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) ||
  699             (so->so_rcv.sb_cc > 0))
  700                 sctp_inpcb_free(inp, 1);
  701         else
  702                 sctp_inpcb_free(inp, 0);
  703         return 0;
  704 }
  705 
  706 static int
  707 sctp6_disconnect(struct socket *so)
  708 {
  709         struct sctp_inpcb *inp;
  710 
  711         inp = (struct sctp_inpcb *)so->so_pcb;
  712         if (inp == NULL) {
  713                 return (ENOTCONN);
  714         }
  715         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
  716                 if (LIST_EMPTY(&inp->sctp_asoc_list)) {
  717                         /* No connection */
  718                         return (ENOTCONN);
  719                 } else {
  720                         int some_on_streamwheel = 0;
  721                         struct sctp_association *asoc;
  722                         struct sctp_tcb *stcb;
  723 
  724                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
  725                         if (stcb == NULL) {
  726                                 return (EINVAL);
  727                         }
  728                         asoc = &stcb->asoc;
  729                         if (!TAILQ_EMPTY(&asoc->out_wheel)) {
  730                                 /* Check to see if some data queued */
  731                                 struct sctp_stream_out *outs;
  732                                 TAILQ_FOREACH(outs, &asoc->out_wheel,
  733                                               next_spoke) {
  734                                         if (!TAILQ_EMPTY(&outs->outqueue)) {
  735                                                 some_on_streamwheel = 1;
  736                                                 break;
  737                                         }
  738                                 }
  739                         }
  740 
  741                         if (TAILQ_EMPTY(&asoc->send_queue) &&
  742                             TAILQ_EMPTY(&asoc->sent_queue) &&
  743                             (some_on_streamwheel == 0)) {
  744                                 /* nothing queued to send, so I'm done... */
  745                                 if ((SCTP_GET_STATE(asoc) !=
  746                                      SCTP_STATE_SHUTDOWN_SENT) &&
  747                                     (SCTP_GET_STATE(asoc) !=
  748                                      SCTP_STATE_SHUTDOWN_ACK_SENT)) {
  749                                         /* only send SHUTDOWN the first time */
  750 #ifdef SCTP_DEBUG
  751                                         if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
  752                                                 printf("%s:%d sends a shutdown\n",
  753                                                        __FILE__,
  754                                                        __LINE__
  755                                                         );
  756                                         }
  757 #endif
  758                                         sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
  759                                         sctp_chunk_output(stcb->sctp_ep, stcb, 1);
  760                                         asoc->state = SCTP_STATE_SHUTDOWN_SENT;
  761                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
  762                                                          stcb->sctp_ep, stcb,
  763                                                          asoc->primary_destination);
  764                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
  765                                                          stcb->sctp_ep, stcb,
  766                                                          asoc->primary_destination);
  767                                 }
  768                         } else {
  769                                 /*
  770                                  * we still got (or just got) data to send,
  771                                  * so set SHUTDOWN_PENDING
  772                                  */
  773                                 /*
  774                                  * XXX sockets draft says that MSG_EOF should
  775                                  * be sent with no data.  currently, we will
  776                                  * allow user data to be sent first and move
  777                                  * to SHUTDOWN-PENDING
  778                                  */
  779                                 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
  780                         }
  781                         return (0);
  782                 }
  783         } else {
  784                 /* UDP model does not support this */
  785                 return EOPNOTSUPP;
  786         }
  787 }
  788 
  789 static int
  790 sctp6_recvoob(struct socket *so, struct mbuf *m, int flags)
  791 {
  792         KASSERT(solocked(so));
  793 
  794         return EOPNOTSUPP;
  795 }
  796 
  797 static int
  798 sctp6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
  799            struct mbuf *control, struct lwp *l)
  800 {
  801         struct sctp_inpcb *inp;
  802         struct in6pcb *inp6;
  803 #ifdef INET
  804         struct sockaddr_in6 *sin6;
  805 #endif /* INET */
  806         /* No SPL needed since sctp_output does this */
  807 
  808         inp = (struct sctp_inpcb *)so->so_pcb;
  809         if (inp == NULL) {
  810                 if (control) {
  811                         m_freem(control);
  812                         control = NULL;
  813                 }
  814                 m_freem(m);
  815                 return EINVAL;
  816         }
  817         inp6 = (struct in6pcb *)inp;
  818         /* For the TCP model we may get a NULL addr, if we
  819          * are a connected socket thats ok.
  820          */
  821         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
  822             (nam == NULL)) {
  823                 goto connected_type;
  824         }
  825         if (nam == NULL) {
  826                 m_freem(m);
  827                 if (control) {
  828                         m_freem(control);
  829                         control = NULL;
  830                 }
  831                 return (EDESTADDRREQ);
  832         }
  833 
  834 #ifdef INET
  835         sin6 = (struct sockaddr_in6 *)nam;
  836         /*
  837          * XXX XXX XXX Check sin6->sin6_len?
  838          */
  839         if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
  840                 /*
  841                  * if IPV6_V6ONLY flag, we discard datagrams
  842                  * destined to a v4 addr or v4-mapped addr
  843                  */
  844                 if (nam->sa_family == AF_INET) {
  845                         return EINVAL;
  846                 }
  847                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  848                         return EINVAL;
  849                 }
  850         }
  851 
  852         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  853                 if (!ip6_v6only) {
  854                         struct sockaddr_in sin;
  855                         /* convert v4-mapped into v4 addr and send */
  856                         in6_sin6_2_sin(&sin, sin6);
  857                         return sctp_send(so, m, (struct sockaddr *)&sin,
  858                             control, l);
  859                 } else {
  860                         /* mapped addresses aren't enabled */
  861                         return EINVAL;
  862                 }
  863         }
  864 #endif /* INET */
  865  connected_type:
  866         /* now what about control */
  867         if (control) {
  868                 if (inp->control) {
  869                         printf("huh? control set?\n");
  870                         m_freem(inp->control);
  871                         inp->control = NULL;
  872                 }
  873                 inp->control = control;
  874         }
  875         /* add it in possibly */
  876         if ((inp->pkt) &&
  877             (inp->pkt->m_flags & M_PKTHDR)) {
  878                 struct mbuf *x;
  879                 int c_len;
  880 
  881                 c_len = 0;
  882                 /* How big is it */
  883                 for (x=m;x;x = x->m_next) {
  884                         c_len += x->m_len;
  885                 }
  886                 inp->pkt->m_pkthdr.len += c_len;
  887         }
  888         /* Place the data */
  889         if (inp->pkt) {
  890                 inp->pkt_last->m_next = m;
  891                 inp->pkt_last = m;
  892         } else {
  893                 inp->pkt_last = inp->pkt = m;
  894         }
  895         if ((so->so_state & SS_MORETOCOME) == 0) {
  896                 /*
  897                  * note with the current version this code will only be
  898                  * used by OpenBSD, NetBSD and FreeBSD have methods for
  899                  * re-defining sosend() to use sctp_sosend().  One can
  900                  * optionaly switch back to this code (by changing back
  901                  * the defininitions but this is not advisable.
  902                  */
  903                 int ret;
  904                 ret = sctp_output(inp, inp->pkt , nam, inp->control, l, 0);
  905                 inp->pkt = NULL;
  906                 inp->control = NULL;
  907                 return (ret);
  908         } else {
  909                 return (0);
  910         }
  911 }
  912 
  913 static int
  914 sctp6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
  915 {
  916         KASSERT(solocked(so));
  917 
  918         m_freem(m);
  919         m_freem(control);
  920 
  921         return EOPNOTSUPP;
  922 }
  923 
  924 static int
  925 sctp6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
  926 {
  927         int error = 0;
  928         struct sctp_inpcb *inp;
  929         struct in6pcb *inp6;
  930         struct sctp_tcb *stcb;
  931 #ifdef INET
  932         struct sockaddr_in6 *sin6;
  933         struct sockaddr_storage ss;
  934 #endif /* INET */
  935 
  936         inp6 = (struct in6pcb *)so->so_pcb;
  937         inp = (struct sctp_inpcb *)so->so_pcb;
  938         if (inp == 0) {
  939                 return (ECONNRESET);    /* I made the same as TCP since
  940                                          * we are not setup? */
  941         }
  942         SCTP_ASOC_CREATE_LOCK(inp);
  943         SCTP_INP_RLOCK(inp);
  944         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
  945             SCTP_PCB_FLAGS_UNBOUND) {
  946                 /* Bind a ephemeral port */
  947                 SCTP_INP_RUNLOCK(inp);
  948                 error = sctp6_bind(so, NULL, l);
  949                 if (error) {
  950                         SCTP_ASOC_CREATE_UNLOCK(inp);
  951 
  952                         return (error);
  953                 }
  954                 SCTP_INP_RLOCK(inp);
  955         }
  956 
  957         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
  958             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
  959                 /* We are already connected AND the TCP model */
  960                 SCTP_INP_RUNLOCK(inp);
  961                 SCTP_ASOC_CREATE_UNLOCK(inp);
  962                 return (EADDRINUSE);
  963         }
  964 
  965 #ifdef INET
  966         sin6 = (struct sockaddr_in6 *)nam;
  967 
  968         /*
  969          * XXX XXX XXX Check sin6->sin6_len?
  970          */
  971 
  972         if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
  973                 /*
  974                  * if IPV6_V6ONLY flag, ignore connections
  975                  * destined to a v4 addr or v4-mapped addr
  976                  */
  977                 if (nam->sa_family == AF_INET) {
  978                         SCTP_INP_RUNLOCK(inp);
  979                         SCTP_ASOC_CREATE_UNLOCK(inp);
  980                         return EINVAL;
  981                 }
  982                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  983                         SCTP_INP_RUNLOCK(inp);
  984                         SCTP_ASOC_CREATE_UNLOCK(inp);
  985                         return EINVAL;
  986                 }
  987         }
  988 
  989         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  990                 if (!ip6_v6only) {
  991                         /* convert v4-mapped into v4 addr */
  992                         in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6);
  993                         nam = (struct sockaddr *)&ss;
  994                 } else {
  995                         /* mapped addresses aren't enabled */
  996                         SCTP_INP_RUNLOCK(inp);
  997                         SCTP_ASOC_CREATE_UNLOCK(inp);
  998                         return EINVAL;
  999                 }
 1000         }
 1001 #endif /* INET */
 1002 
 1003         /* Now do we connect? */
 1004         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 1005                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1006                 if (stcb) {
 1007                         SCTP_TCB_UNLOCK (stcb);
 1008                 }
 1009                 SCTP_INP_RUNLOCK(inp);
 1010         } else {
 1011                 SCTP_INP_RUNLOCK(inp);
 1012                 SCTP_INP_WLOCK(inp);
 1013                 SCTP_INP_INCR_REF(inp);
 1014                 SCTP_INP_WUNLOCK(inp);
 1015                 stcb = sctp_findassociation_ep_addr(&inp, nam, NULL, NULL, NULL);
 1016                 if (stcb == NULL) {
 1017                         SCTP_INP_WLOCK(inp);
 1018                         SCTP_INP_DECR_REF(inp);
 1019                         SCTP_INP_WUNLOCK(inp);
 1020                 }
 1021         }
 1022 
 1023         if (stcb != NULL) {
 1024                 /* Already have or am bring up an association */
 1025                 SCTP_ASOC_CREATE_UNLOCK(inp);
 1026                 SCTP_TCB_UNLOCK (stcb);
 1027                 return (EALREADY);
 1028         }
 1029         /* We are GOOD to go */
 1030         stcb = sctp_aloc_assoc(inp, nam, 1, &error, 0);
 1031         SCTP_ASOC_CREATE_UNLOCK(inp);
 1032         if (stcb == NULL) {
 1033                 /* Gak! no memory */
 1034                 return (error);
 1035         }
 1036         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 1037                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
 1038                 /* Set the connected flag so we can queue data */
 1039                 soisconnecting(so);
 1040         }
 1041         stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
 1042         SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
 1043         sctp_send_initiate(inp, stcb);
 1044         SCTP_TCB_UNLOCK (stcb);
 1045         return error;
 1046 }
 1047 
 1048 static int
 1049 sctp6_connect2(struct socket *so, struct socket *so2)
 1050 {
 1051         KASSERT(solocked(so));
 1052 
 1053         return EOPNOTSUPP;
 1054 }
 1055 
 1056 static int
 1057 sctp6_getaddr(struct socket *so, struct sockaddr *nam)
 1058 {
 1059         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 1060         struct sctp_inpcb *inp;
 1061         int error;
 1062 
 1063         /*
 1064          * Do the malloc first in case it blocks.
 1065          */
 1066         memset(sin6, 0, sizeof(*sin6));
 1067         sin6->sin6_family = AF_INET6;
 1068         sin6->sin6_len = sizeof(*sin6);
 1069 
 1070         inp = (struct sctp_inpcb *)so->so_pcb;
 1071         if (inp == NULL) {
 1072                 return ECONNRESET;
 1073         }
 1074 
 1075         sin6->sin6_port = inp->sctp_lport;
 1076         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 1077                 /* For the bound all case you get back 0 */
 1078                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 1079                         struct sctp_tcb *stcb;
 1080                         const struct sockaddr_in6 *sin_a6;
 1081                         struct sctp_nets *net;
 1082                         int fnd;
 1083 
 1084                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1085                         if (stcb == NULL) {
 1086                                 goto notConn6;
 1087                         }
 1088                         fnd = 0;
 1089                         sin_a6 = NULL;
 1090                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1091                                 sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro);
 1092                                 if (sin_a6->sin6_family == AF_INET6) {
 1093                                         fnd = 1;
 1094                                         break;
 1095                                 }
 1096                         }
 1097                         if ((!fnd) || (sin_a6 == NULL)) {
 1098                                 /* punt */
 1099                                 goto notConn6;
 1100                         }
 1101                         sin6->sin6_addr = sctp_ipv6_source_address_selection(
 1102                             inp, stcb, &net->ro, net, 0);
 1103 
 1104                 } else {
 1105                         /* For the bound all case you get back 0 */
 1106                 notConn6:
 1107                         memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
 1108                 }
 1109         } else {
 1110                 /* Take the first IPv6 address in the list */
 1111                 struct sctp_laddr *laddr;
 1112                 int fnd = 0;
 1113                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 1114                         if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
 1115                                 struct sockaddr_in6 *sin_a;
 1116                                 sin_a = (struct sockaddr_in6 *)laddr->ifa->ifa_addr;
 1117                                 sin6->sin6_addr = sin_a->sin6_addr;
 1118                                 fnd = 1;
 1119                                 break;
 1120                         }
 1121                 }
 1122                 if (!fnd) {
 1123                         return ENOENT;
 1124                 }
 1125         }
 1126         /* Scoping things for v6 */
 1127         if ((error = sa6_recoverscope(sin6)) != 0)
 1128                 return (error);
 1129 
 1130         return (0);
 1131 }
 1132 
 1133 static int
 1134 sctp6_peeraddr(struct socket *so, struct sockaddr *nam)
 1135 {
 1136         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
 1137         int fnd, error;
 1138         const struct sockaddr_in6 *sin_a6;
 1139         struct sctp_inpcb *inp;
 1140         struct sctp_tcb *stcb;
 1141         struct sctp_nets *net;
 1142         /*
 1143          * Do the malloc first in case it blocks.
 1144          */
 1145         inp = (struct sctp_inpcb *)so->so_pcb;
 1146         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
 1147                 /* UDP type and listeners will drop out here */
 1148                 return (ENOTCONN);
 1149         }
 1150         memset(sin6, 0, sizeof(*sin6));
 1151         sin6->sin6_family = AF_INET6;
 1152         sin6->sin6_len = sizeof(*sin6);
 1153 
 1154         /* We must recapture incase we blocked */
 1155         inp = (struct sctp_inpcb *)so->so_pcb;
 1156         if (inp == NULL) {
 1157                 return ECONNRESET;
 1158         }
 1159         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 1160         if (stcb == NULL) {
 1161                 return ECONNRESET;
 1162         }
 1163         fnd = 0;
 1164         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 1165                 sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro);
 1166                 if (sin_a6->sin6_family == AF_INET6) {
 1167                         fnd = 1;
 1168                         sin6->sin6_port = stcb->rport;
 1169                         sin6->sin6_addr = sin_a6->sin6_addr;
 1170                         break;
 1171                 }
 1172         }
 1173         if (!fnd) {
 1174                 /* No IPv4 address */
 1175                 return ENOENT;
 1176         }
 1177         if ((error = sa6_recoverscope(sin6)) != 0)
 1178                 return (error);
 1179 
 1180         return (0);
 1181 }
 1182 
 1183 static int
 1184 sctp6_sockaddr(struct socket *so, struct sockaddr *nam)
 1185 {
 1186         struct in6pcb *inp6 = sotoin6pcb(so);
 1187         int     error;
 1188 
 1189         if (inp6 == NULL)
 1190                 return EINVAL;
 1191 
 1192         /* allow v6 addresses precedence */
 1193         error = sctp6_getaddr(so, nam);
 1194         if (error) {
 1195                 /* try v4 next if v6 failed */
 1196                 error = sctp_sockaddr(so, nam);
 1197                 if (error) {
 1198                         return (error);
 1199                 }
 1200 
 1201                 /* if I'm V6ONLY, convert it to v4-mapped */
 1202                 if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
 1203                         struct sockaddr_in6 sin6;
 1204                         in6_sin_2_v4mapsin6((struct sockaddr_in *)nam, &sin6);
 1205                         memcpy(nam, &sin6, sizeof(struct sockaddr_in6));
 1206                 }
 1207         }
 1208         return (error);
 1209 }
 1210 
 1211 #if 0
 1212 static int
 1213 sctp6_getpeeraddr(struct socket *so, struct sockaddr *nam)
 1214 {
 1215         struct in6pcb *inp6 = sotoin6pcb(so);
 1216         int     error;
 1217 
 1218         if (inp6 == NULL)
 1219                 return EINVAL;
 1220 
 1221         /* allow v6 addresses precedence */
 1222         error = sctp6_peeraddr(so, nam);
 1223         if (error) {
 1224                 /* try v4 next if v6 failed */
 1225                 error = sctp_peeraddr(so, nam);
 1226                 if (error) {
 1227                         return (error);
 1228                 }
 1229                 /* if I'm V6ONLY, convert it to v4-mapped */
 1230                 if ((inp6->in6p_flags & IN6P_IPV6_V6ONLY)) {
 1231                         struct sockaddr_in6 sin6;
 1232                         in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
 1233                         memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
 1234                 }
 1235         }
 1236         return error;
 1237 }
 1238 #endif
 1239 
 1240 static int
 1241 sctp6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
 1242 {
 1243         int error = 0;
 1244         int family;
 1245 
 1246         if (cmd == SIOCCONNECTX) {
 1247                 solock(so);
 1248                 error = sctp_do_connect_x(so, nam, curlwp, 0);
 1249                 sounlock(so);
 1250         } else if (cmd == SIOCCONNECTXDEL) {
 1251                 solock(so);
 1252                 error = sctp_do_connect_x(so, nam, curlwp, 1);
 1253                 sounlock(so);
 1254         } else {
 1255                 family = so->so_proto->pr_domain->dom_family;
 1256                 switch (family) {
 1257 #ifdef INET
 1258                 case PF_INET:
 1259                         error = in_control(so, cmd, nam, ifp);
 1260                         break;
 1261 #endif
 1262 #ifdef INET6
 1263                 case PF_INET6:
 1264                         error = in6_control(so, cmd, nam, ifp);
 1265                         break;
 1266 #endif
 1267                 default:
 1268                         error = EAFNOSUPPORT;
 1269                 }
 1270         }
 1271         return (error);
 1272 }
 1273 
 1274 static int
 1275 sctp6_accept(struct socket *so, struct sockaddr *nam)
 1276 {
 1277         return sctp_accept(so, nam);
 1278 }
 1279 
 1280 static int
 1281 sctp6_stat(struct socket *so, struct stat *ub)
 1282 {
 1283         return 0;
 1284 }
 1285 
 1286 static int
 1287 sctp6_listen(struct socket *so, struct lwp *l)
 1288 {
 1289         return sctp_listen(so, l);
 1290 }
 1291 
 1292 static int
 1293 sctp6_shutdown(struct socket *so)
 1294 {
 1295         return sctp_shutdown(so);
 1296 }
 1297 
 1298 static int
 1299 sctp6_rcvd(struct socket *so, int flags, struct lwp *l)
 1300 {
 1301         KASSERT(solocked(so));
 1302 
 1303         return sctp_rcvd(so, flags, l);
 1304 }
 1305 
 1306 static int
 1307 sctp6_purgeif(struct socket *so, struct ifnet *ifp)
 1308 {
 1309         struct ifaddr *ifa;
 1310         /* FIXME NOMPSAFE */
 1311         IFADDR_READER_FOREACH(ifa, ifp) {
 1312                 if (ifa->ifa_addr->sa_family == PF_INET6) {
 1313                         sctp_delete_ip_address(ifa);
 1314                 }
 1315         }
 1316 
 1317 #ifndef NET_MPSAFE
 1318         mutex_enter(softnet_lock);
 1319 #endif
 1320         in6_purgeif(ifp);
 1321 #ifndef NET_MPSAFE
 1322         mutex_exit(softnet_lock);
 1323 #endif
 1324 
 1325         return 0;
 1326 }
 1327 
 1328 PR_WRAP_USRREQS(sctp6)
 1329 #define sctp6_attach    sctp6_attach_wrapper
 1330 #define sctp6_detach    sctp6_detach_wrapper
 1331 #define sctp6_accept    sctp6_accept_wrapper
 1332 #define sctp6_bind      sctp6_bind_wrapper
 1333 #define sctp6_listen    sctp6_listen_wrapper
 1334 #define sctp6_connect   sctp6_connect_wrapper
 1335 #define sctp6_connect2  sctp6_connect2_wrapper
 1336 #define sctp6_disconnect        sctp6_disconnect_wrapper
 1337 #define sctp6_shutdown  sctp6_shutdown_wrapper
 1338 #define sctp6_abort     sctp6_abort_wrapper
 1339 #define sctp6_ioctl     sctp6_ioctl_wrapper
 1340 #define sctp6_stat      sctp6_stat_wrapper
 1341 #define sctp6_peeraddr  sctp6_peeraddr_wrapper
 1342 #define sctp6_sockaddr  sctp6_sockaddr_wrapper
 1343 #define sctp6_rcvd      sctp6_rcvd_wrapper
 1344 #define sctp6_recvoob   sctp6_recvoob_wrapper
 1345 #define sctp6_send      sctp6_send_wrapper
 1346 #define sctp6_sendoob   sctp6_sendoob_wrapper
 1347 #define sctp6_purgeif   sctp6_purgeif_wrapper
 1348 
 1349 const struct pr_usrreqs sctp6_usrreqs = {
 1350         .pr_attach      = sctp6_attach,
 1351         .pr_detach      = sctp6_detach,
 1352         .pr_accept      = sctp6_accept,
 1353         .pr_bind        = sctp6_bind,
 1354         .pr_listen      = sctp6_listen,
 1355         .pr_connect     = sctp6_connect,
 1356         .pr_connect2    = sctp6_connect2,
 1357         .pr_disconnect  = sctp6_disconnect,
 1358         .pr_shutdown    = sctp6_shutdown,
 1359         .pr_abort       = sctp6_abort,
 1360         .pr_ioctl       = sctp6_ioctl,
 1361         .pr_stat        = sctp6_stat,
 1362         .pr_peeraddr    = sctp6_peeraddr,
 1363         .pr_sockaddr    = sctp6_sockaddr,
 1364         .pr_rcvd        = sctp6_rcvd,
 1365         .pr_recvoob     = sctp6_recvoob,
 1366         .pr_send        = sctp6_send,
 1367         .pr_sendoob     = sctp6_sendoob,
 1368         .pr_purgeif     = sctp6_purgeif,
 1369 };

Cache object: 260b0ce8443d1b369b33ecec9ea2f74d


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.