The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/keysock.c

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    1 /*      $NetBSD: keysock.c,v 1.11 2006/10/13 20:53:59 christos Exp $    */
    2 /*      $FreeBSD: src/sys/netipsec/keysock.c,v 1.3.2.1 2003/01/24 05:11:36 sam Exp $    */
    3 /*      $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $        */
    4 
    5 /*
    6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    7  * All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. Neither the name of the project nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __KERNEL_RCSID(0, "$NetBSD: keysock.c,v 1.11 2006/10/13 20:53:59 christos Exp $");
   36 
   37 #include "opt_ipsec.h"
   38 
   39 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
   40 
   41 #include <sys/types.h>
   42 #include <sys/param.h>
   43 #include <sys/domain.h>
   44 #include <sys/errno.h>
   45 #include <sys/kernel.h>
   46 #include <sys/malloc.h>
   47 #include <sys/mbuf.h>
   48 #include <sys/protosw.h>
   49 #include <sys/signalvar.h>
   50 #include <sys/socket.h>
   51 #include <sys/socketvar.h>
   52 #include <sys/sysctl.h>
   53 #include <sys/systm.h>
   54 
   55 #include <net/raw_cb.h>
   56 #include <net/route.h>
   57 
   58 #include <net/pfkeyv2.h>
   59 #include <netipsec/key.h>
   60 #include <netipsec/keysock.h>
   61 #include <netipsec/key_debug.h>
   62 
   63 #include <netipsec/ipsec_osdep.h>
   64 
   65 #include <machine/stdarg.h>
   66 
   67 typedef int     pr_output_t (struct mbuf *, struct socket *);
   68 
   69 struct key_cb {
   70         int key_count;
   71         int any_count;
   72 };
   73 static struct key_cb key_cb;
   74 
   75 static struct sockaddr key_dst = {
   76     .sa_len = 2,
   77     .sa_family = PF_KEY,
   78 };
   79 static struct sockaddr key_src = {
   80     .sa_len = 2,
   81     .sa_family = PF_KEY,
   82 };
   83 
   84 
   85 static int key_sendup0 __P((struct rawcb *, struct mbuf *, int, int));
   86 
   87 struct pfkeystat pfkeystat;
   88 
   89 int key_registered_sb_max = (NMBCLUSTERS * MHLEN); /* XXX arbitrary */
   90 
   91 /* XXX sysctl */
   92 #ifdef __FreeBSD__
   93 SYSCTL_INT(_net_key, OID_AUTO, registered_sbmax, CTLFLAG_RD,
   94     &key_registered_sb_max , 0, "Maximum kernel-to-user PFKEY datagram size");
   95 #endif
   96 
   97 /*
   98  * key_output()
   99  */
  100 int
  101 key_output(struct mbuf *m, ...)
  102 {
  103         struct sadb_msg *msg;
  104         int len, error = 0;
  105         int s;
  106         struct socket *so;
  107         va_list ap;
  108 
  109         va_start(ap, m);
  110         so = va_arg(ap, struct socket *);
  111         va_end(ap);
  112 
  113         if (m == 0)
  114                 panic("key_output: NULL pointer was passed");
  115 
  116         pfkeystat.out_total++;
  117         pfkeystat.out_bytes += m->m_pkthdr.len;
  118 
  119         len = m->m_pkthdr.len;
  120         if (len < sizeof(struct sadb_msg)) {
  121                 pfkeystat.out_tooshort++;
  122                 error = EINVAL;
  123                 goto end;
  124         }
  125 
  126         if (m->m_len < sizeof(struct sadb_msg)) {
  127                 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
  128                         pfkeystat.out_nomem++;
  129                         error = ENOBUFS;
  130                         goto end;
  131                 }
  132         }
  133 
  134         if ((m->m_flags & M_PKTHDR) == 0)
  135                 panic("key_output: not M_PKTHDR ??");
  136 
  137         KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
  138 
  139         msg = mtod(m, struct sadb_msg *);
  140         pfkeystat.out_msgtype[msg->sadb_msg_type]++;
  141         if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
  142                 pfkeystat.out_invlen++;
  143                 error = EINVAL;
  144                 goto end;
  145         }
  146 
  147         /*XXX giant lock*/
  148         s = splsoftnet();
  149         error = key_parse(m, so);
  150         m = NULL;
  151         splx(s);
  152 end:
  153         if (m)
  154                 m_freem(m);
  155         return error;
  156 }
  157 
  158 /*
  159  * send message to the socket.
  160  */
  161 static int
  162 key_sendup0(
  163     struct rawcb *rp,
  164     struct mbuf *m,
  165     int promisc,
  166     int sbprio
  167 )
  168 {
  169         int error;
  170         int ok;
  171 
  172         if (promisc) {
  173                 struct sadb_msg *pmsg;
  174 
  175                 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
  176                 if (m && m->m_len < sizeof(struct sadb_msg))
  177                         m = m_pullup(m, sizeof(struct sadb_msg));
  178                 if (!m) {
  179                         pfkeystat.in_nomem++;
  180                         m_freem(m);
  181                         return ENOBUFS;
  182                 }
  183                 m->m_pkthdr.len += sizeof(*pmsg);
  184 
  185                 pmsg = mtod(m, struct sadb_msg *);
  186                 bzero(pmsg, sizeof(*pmsg));
  187                 pmsg->sadb_msg_version = PF_KEY_V2;
  188                 pmsg->sadb_msg_type = SADB_X_PROMISC;
  189                 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
  190                 /* pid and seq? */
  191 
  192                 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
  193         }
  194 
  195         if (sbprio == 0)
  196                 ok = sbappendaddr(&rp->rcb_socket->so_rcv,
  197                                (struct sockaddr *)&key_src, m, NULL);
  198         else
  199                 ok = sbappendaddrchain(&rp->rcb_socket->so_rcv,
  200                                (struct sockaddr *)&key_src, m, sbprio);
  201 
  202           if (!ok) {
  203                 pfkeystat.in_nomem++;
  204                 m_freem(m);
  205                 error = ENOBUFS;
  206         } else
  207                 error = 0;
  208         sorwakeup(rp->rcb_socket);
  209         return error;
  210 }
  211 
  212 /* XXX this interface should be obsoleted. */
  213 int
  214 key_sendup(so, msg, len, target)
  215         struct socket *so;
  216         struct sadb_msg *msg;
  217         u_int len;
  218         int target;     /*target of the resulting message*/
  219 {
  220         struct mbuf *m, *n, *mprev;
  221         int tlen;
  222 
  223         /* sanity check */
  224         if (so == 0 || msg == 0)
  225                 panic("key_sendup: NULL pointer was passed");
  226 
  227         KEYDEBUG(KEYDEBUG_KEY_DUMP,
  228                 printf("key_sendup: \n");
  229                 kdebug_sadb(msg));
  230 
  231         /*
  232          * we increment statistics here, just in case we have ENOBUFS
  233          * in this function.
  234          */
  235         pfkeystat.in_total++;
  236         pfkeystat.in_bytes += len;
  237         pfkeystat.in_msgtype[msg->sadb_msg_type]++;
  238 
  239         /*
  240          * Get mbuf chain whenever possible (not clusters),
  241          * to save socket buffer.  We'll be generating many SADB_ACQUIRE
  242          * messages to listening key sockets.  If we simply allocate clusters,
  243          * sbappendaddr() will raise ENOBUFS due to too little sbspace().
  244          * sbspace() computes # of actual data bytes AND mbuf region.
  245          *
  246          * TODO: SADB_ACQUIRE filters should be implemented.
  247          */
  248         tlen = len;
  249         m = mprev = NULL;
  250         while (tlen > 0) {
  251                 if (tlen == len) {
  252                         MGETHDR(n, M_DONTWAIT, MT_DATA);
  253                         n->m_len = MHLEN;
  254                 } else {
  255                         MGET(n, M_DONTWAIT, MT_DATA);
  256                         n->m_len = MLEN;
  257                 }
  258                 if (!n) {
  259                         pfkeystat.in_nomem++;
  260                         return ENOBUFS;
  261                 }
  262                 if (tlen >= MCLBYTES) { /*XXX better threshold? */
  263                         MCLGET(n, M_DONTWAIT);
  264                         if ((n->m_flags & M_EXT) == 0) {
  265                                 m_free(n);
  266                                 m_freem(m);
  267                                 pfkeystat.in_nomem++;
  268                                 return ENOBUFS;
  269                         }
  270                         n->m_len = MCLBYTES;
  271                 }
  272 
  273                 if (tlen < n->m_len)
  274                         n->m_len = tlen;
  275                 n->m_next = NULL;
  276                 if (m == NULL)
  277                         m = mprev = n;
  278                 else {
  279                         mprev->m_next = n;
  280                         mprev = n;
  281                 }
  282                 tlen -= n->m_len;
  283                 n = NULL;
  284         }
  285         m->m_pkthdr.len = len;
  286         m->m_pkthdr.rcvif = NULL;
  287         m_copyback(m, 0, len, (caddr_t)msg);
  288 
  289         /* avoid duplicated statistics */
  290         pfkeystat.in_total--;
  291         pfkeystat.in_bytes -= len;
  292         pfkeystat.in_msgtype[msg->sadb_msg_type]--;
  293 
  294         return key_sendup_mbuf(so, m, target);
  295 }
  296 
  297 /* so can be NULL if target != KEY_SENDUP_ONE */
  298 int
  299 key_sendup_mbuf(so, m, target /*, sbprio */)
  300         struct socket *so;
  301         struct mbuf *m;
  302         int target;
  303 {
  304         struct mbuf *n;
  305         struct keycb *kp;
  306         int sendup;
  307         struct rawcb *rp;
  308         int error = 0;
  309         int sbprio = 0; /* XXX should be a parameter */
  310 
  311         if (m == NULL)
  312                 panic("key_sendup_mbuf: NULL pointer was passed");
  313         if (so == NULL && target == KEY_SENDUP_ONE)
  314                 panic("key_sendup_mbuf: NULL pointer was passed");
  315 
  316         /*
  317          * RFC 2367 says ACQUIRE and other kernel-generated messages
  318          * are special. We treat all KEY_SENDUP_REGISTERED messages
  319          * as special, delivering them to all registered sockets
  320          * even if the socket is at or above its so->so_rcv.sb_max limits.
  321          * The only constraint is that the  so_rcv data fall below
  322          * key_registered_sb_max.
  323          * Doing that check here avoids reworking every key_sendup_mbuf()
  324          * in the short term. . The rework will be done after a technical
  325          * conensus that this approach is appropriate.
  326          */
  327         if (target == KEY_SENDUP_REGISTERED) {
  328                 sbprio = SB_PRIO_BESTEFFORT;
  329         }
  330 
  331         pfkeystat.in_total++;
  332         pfkeystat.in_bytes += m->m_pkthdr.len;
  333         if (m->m_len < sizeof(struct sadb_msg)) {
  334 #if 1
  335                 m = m_pullup(m, sizeof(struct sadb_msg));
  336                 if (m == NULL) {
  337                         pfkeystat.in_nomem++;
  338                         return ENOBUFS;
  339                 }
  340 #else
  341                 /* don't bother pulling it up just for stats */
  342 #endif
  343         }
  344         if (m->m_len >= sizeof(struct sadb_msg)) {
  345                 struct sadb_msg *msg;
  346                 msg = mtod(m, struct sadb_msg *);
  347                 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
  348         }
  349 
  350         LIST_FOREACH(rp, &rawcb_list, rcb_list)
  351         {
  352                 struct socket * kso = rp->rcb_socket;
  353                 if (rp->rcb_proto.sp_family != PF_KEY)
  354                         continue;
  355                 if (rp->rcb_proto.sp_protocol
  356                  && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
  357                         continue;
  358                 }
  359 
  360                 kp = (struct keycb *)rp;
  361 
  362                 /*
  363                  * If you are in promiscuous mode, and when you get broadcasted
  364                  * reply, you'll get two PF_KEY messages.
  365                  * (based on pf_key@inner.net message on 14 Oct 1998)
  366                  */
  367                 if (((struct keycb *)rp)->kp_promisc) {
  368                         if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
  369                                 (void)key_sendup0(rp, n, 1, 0);
  370                                 n = NULL;
  371                         }
  372                 }
  373 
  374                 /* the exact target will be processed later */
  375                 if (so && sotorawcb(so) == rp)
  376                         continue;
  377 
  378                 sendup = 0;
  379                 switch (target) {
  380                 case KEY_SENDUP_ONE:
  381                         /* the statement has no effect */
  382                         if (so && sotorawcb(so) == rp)
  383                                 sendup++;
  384                         break;
  385                 case KEY_SENDUP_ALL:
  386                         sendup++;
  387                         break;
  388                 case KEY_SENDUP_REGISTERED:
  389                         if (kp->kp_registered) {
  390                                 if (kso->so_rcv.sb_cc <= key_registered_sb_max)
  391                                         sendup++;
  392                                 else
  393                                         printf("keysock: "
  394                                                "registered sendup dropped, "
  395                                                "sb_cc %ld max %d\n",
  396                                                kso->so_rcv.sb_cc,
  397                                                key_registered_sb_max);
  398                         }
  399                         break;
  400                 }
  401                 pfkeystat.in_msgtarget[target]++;
  402 
  403                 if (!sendup)
  404                         continue;
  405 
  406                 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
  407                         m_freem(m);
  408                         pfkeystat.in_nomem++;
  409                         return ENOBUFS;
  410                 }
  411 
  412                 if ((error = key_sendup0(rp, n, 0, 0)) != 0) {
  413                         m_freem(m);
  414                         return error;
  415                 }
  416 
  417                 n = NULL;
  418         }
  419 
  420         /* The 'later' time for processing the exact target has arrived */
  421         if (so) {
  422                 error = key_sendup0(sotorawcb(so), m, 0, sbprio);
  423                 m = NULL;
  424         } else {
  425                 error = 0;
  426                 m_freem(m);
  427         }
  428         return error;
  429 }
  430 
  431 #ifdef __FreeBSD__
  432 
  433 /*
  434  * key_abort()
  435  * derived from net/rtsock.c:rts_abort()
  436  */
  437 static int
  438 key_abort(struct socket *so)
  439 {
  440         int s, error;
  441         s = splnet();   /* FreeBSD */
  442         error = raw_usrreqs.pru_abort(so);
  443         splx(s);
  444         return error;
  445 }
  446 
  447 /*
  448  * key_attach()
  449  * derived from net/rtsock.c:rts_attach()
  450  */
  451 static int
  452 key_attach(struct socket *so, int proto, struct proc *td)
  453 {
  454         struct keycb *kp;
  455         int s, error;
  456 
  457         if (sotorawcb(so) != 0)
  458                 return EISCONN; /* XXX panic? */
  459         kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
  460         if (kp == 0)
  461                 return ENOBUFS;
  462 
  463         /*
  464          * The spl[soft]net() is necessary to block protocols from sending
  465          * error notifications (like RTM_REDIRECT or RTM_LOSING) while
  466          * this PCB is extant but incompletely initialized.
  467          * Probably we should try to do more of this work beforehand and
  468          * eliminate the spl.
  469          */
  470         s = splnet();   /* FreeBSD */
  471         so->so_pcb = (caddr_t)kp;
  472         error = raw_usrreqs.pru_attach(so, proto, td);
  473         kp = (struct keycb *)sotorawcb(so);
  474         if (error) {
  475                 free(kp, M_PCB);
  476                 so->so_pcb = (caddr_t) 0;
  477                 splx(s);
  478                 return error;
  479         }
  480 
  481         kp->kp_promisc = kp->kp_registered = 0;
  482 
  483         if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
  484                 key_cb.key_count++;
  485         key_cb.any_count++;
  486         kp->kp_raw.rcb_laddr = &key_src;
  487         kp->kp_raw.rcb_faddr = &key_dst;
  488         soisconnected(so);
  489         so->so_options |= SO_USELOOPBACK;
  490 
  491         splx(s);
  492         return 0;
  493 }
  494 
  495 /*
  496  * key_bind()
  497  * derived from net/rtsock.c:rts_bind()
  498  */
  499 static int
  500 key_bind(struct socket *so, struct sockaddr *nam, struct proc *td)
  501 {
  502         int s, error;
  503         s = splnet();   /* FreeBSD */
  504         error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
  505         splx(s);
  506         return error;
  507 }
  508 
  509 /*
  510  * key_connect()
  511  * derived from net/rtsock.c:rts_connect()
  512  */
  513 static int
  514 key_connect(struct socket *so, struct sockaddr *nam, struct proc *td)
  515 {
  516         int s, error;
  517         s = splnet();   /* FreeBSD */
  518         error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
  519         splx(s);
  520         return error;
  521 }
  522 
  523 /*
  524  * key_detach()
  525  * derived from net/rtsock.c:rts_detach()
  526  */
  527 static int
  528 key_detach(struct socket *so)
  529 {
  530         struct keycb *kp = (struct keycb *)sotorawcb(so);
  531         int s, error;
  532 
  533         s = splnet();   /* FreeBSD */
  534         if (kp != 0) {
  535                 if (kp->kp_raw.rcb_proto.sp_protocol
  536                     == PF_KEY) /* XXX: AF_KEY */
  537                         key_cb.key_count--;
  538                 key_cb.any_count--;
  539 
  540                 key_freereg(so);
  541         }
  542         error = raw_usrreqs.pru_detach(so);
  543         splx(s);
  544         return error;
  545 }
  546 
  547 /*
  548  * key_disconnect()
  549  * derived from net/rtsock.c:key_disconnect()
  550  */
  551 static int
  552 key_disconnect(struct socket *so)
  553 {
  554         int s, error;
  555         s = splnet();   /* FreeBSD */
  556         error = raw_usrreqs.pru_disconnect(so);
  557         splx(s);
  558         return error;
  559 }
  560 
  561 /*
  562  * key_peeraddr()
  563  * derived from net/rtsock.c:rts_peeraddr()
  564  */
  565 static int
  566 key_peeraddr(struct socket *so, struct sockaddr **nam)
  567 {
  568         int s, error;
  569         s = splnet();   /* FreeBSD */
  570         error = raw_usrreqs.pru_peeraddr(so, nam);
  571         splx(s);
  572         return error;
  573 }
  574 
  575 /*
  576  * key_send()
  577  * derived from net/rtsock.c:rts_send()
  578  */
  579 static int
  580 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
  581          struct mbuf *control, struct proc *td)
  582 {
  583         int s, error;
  584         s = splnet();   /* FreeBSD */
  585         error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
  586         splx(s);
  587         return error;
  588 }
  589 
  590 /*
  591  * key_shutdown()
  592  * derived from net/rtsock.c:rts_shutdown()
  593  */
  594 static int
  595 key_shutdown(struct socket *so)
  596 {
  597         int s, error;
  598         s = splnet();   /* FreeBSD */
  599         error = raw_usrreqs.pru_shutdown(so);
  600         splx(s);
  601         return error;
  602 }
  603 
  604 /*
  605  * key_sockaddr()
  606  * derived from net/rtsock.c:rts_sockaddr()
  607  */
  608 static int
  609 key_sockaddr(struct socket *so, struct sockaddr **nam)
  610 {
  611         int s, error;
  612         s = splnet();   /* FreeBSD */
  613         error = raw_usrreqs.pru_sockaddr(so, nam);
  614         splx(s);
  615         return error;
  616 }
  617 #else /*!__FreeBSD__ -- traditional proto_usrreq() switch */
  618 
  619 /*
  620  * key_usrreq()
  621  * derived from net/rtsock.c:route_usrreq()
  622  */
  623 int
  624 key_usrreq(so, req, m, nam, control, l)
  625         struct socket *so;
  626         int req;
  627         struct mbuf *m, *nam, *control;
  628         struct lwp *l;
  629 {
  630         int error = 0;
  631         struct keycb *kp = (struct keycb *)sotorawcb(so);
  632         int s;
  633 
  634         s = splsoftnet();
  635         if (req == PRU_ATTACH) {
  636                 kp = (struct keycb *)malloc(sizeof(*kp), M_PCB, M_WAITOK);
  637                 so->so_pcb = (caddr_t)kp;
  638                 if (so->so_pcb)
  639                         bzero(so->so_pcb, sizeof(*kp));
  640         }
  641         if (req == PRU_DETACH && kp) {
  642                 int af = kp->kp_raw.rcb_proto.sp_protocol;
  643                 if (af == PF_KEY) /* XXX: AF_KEY */
  644                         key_cb.key_count--;
  645                 key_cb.any_count--;
  646 
  647                 key_freereg(so);
  648         }
  649 
  650         error = raw_usrreq(so, req, m, nam, control, l);
  651         m = control = NULL;     /* reclaimed in raw_usrreq */
  652         kp = (struct keycb *)sotorawcb(so);
  653         if (req == PRU_ATTACH && kp) {
  654                 int af = kp->kp_raw.rcb_proto.sp_protocol;
  655                 if (error) {
  656                         pfkeystat.sockerr++;
  657                         free((caddr_t)kp, M_PCB);
  658                         so->so_pcb = (caddr_t) 0;
  659                         splx(s);
  660                         return (error);
  661                 }
  662 
  663                 kp->kp_promisc = kp->kp_registered = 0;
  664 
  665                 if (af == PF_KEY) /* XXX: AF_KEY */
  666                         key_cb.key_count++;
  667                 key_cb.any_count++;
  668                 kp->kp_raw.rcb_laddr = &key_src;
  669                 kp->kp_raw.rcb_faddr = &key_dst;
  670                 soisconnected(so);
  671                 so->so_options |= SO_USELOOPBACK;
  672         }
  673         splx(s);
  674         return (error);
  675 }
  676 #endif /*!__FreeBSD__*/
  677 
  678 /* sysctl */
  679 #ifdef SYSCTL_NODE
  680 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
  681 #endif /* SYSCTL_NODE */
  682 
  683 /*
  684  * Definitions of protocols supported in the KEY domain.
  685  */
  686 
  687 #ifdef __FreeBSD__
  688 extern struct domain keydomain;
  689 
  690 struct pr_usrreqs key_usrreqs = {
  691         key_abort, pru_accept_notsupp, key_attach, key_bind,
  692         key_connect,
  693         pru_connect2_notsupp, pru_control_notsupp, key_detach,
  694         key_disconnect, pru_listen_notsupp, key_peeraddr,
  695         pru_rcvd_notsupp,
  696         pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
  697         key_sockaddr, sosend, soreceive, sopoll
  698 };
  699 
  700 struct protosw keysw[] = {
  701 { SOCK_RAW,     &keydomain,     PF_KEY_V2,      PR_ATOMIC|PR_ADDR,
  702   0,            (pr_output_t *)key_output,      raw_ctlinput, 0,
  703   0,
  704   raw_init,     0,              0,              0,
  705   &key_usrreqs
  706 }
  707 };
  708 
  709 static void
  710 key_init0(void)
  711 {
  712         bzero((caddr_t)&key_cb, sizeof(key_cb));
  713         key_init();
  714 }
  715 
  716 struct domain keydomain =
  717     { PF_KEY, "key", key_init0, 0, 0,
  718       keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
  719 
  720 DOMAIN_SET(key);
  721 
  722 #else /* !__FreeBSD__ */
  723 
  724 DOMAIN_DEFINE(keydomain);
  725 
  726 const struct protosw keysw[] = {
  727     {
  728         .pr_type = SOCK_RAW,
  729         .pr_domain = &keydomain,
  730         .pr_protocol = PF_KEY_V2,
  731         .pr_flags = PR_ATOMIC|PR_ADDR,
  732         .pr_output = key_output,
  733         .pr_ctlinput = raw_ctlinput,
  734         .pr_usrreq = key_usrreq,
  735         .pr_init = raw_init,
  736     }
  737 };
  738 
  739 struct domain keydomain = {
  740     .dom_family = PF_KEY,
  741     .dom_name = "key",
  742     .dom_init = key_init,
  743     .dom_protosw = keysw,
  744     .dom_protoswNPROTOSW = &keysw[__arraycount(keysw)],
  745 };
  746 
  747 #endif

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