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/netipsec/keysock.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*      $FreeBSD: releng/11.1/sys/netipsec/keysock.c 315514 2017-03-18 22:04:20Z ae $   */
    2 /*      $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $        */
    3 
    4 /*-
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    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. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include "opt_ipsec.h"
   34 
   35 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
   36 
   37 #include <sys/types.h>
   38 #include <sys/param.h>
   39 #include <sys/domain.h>
   40 #include <sys/errno.h>
   41 #include <sys/kernel.h>
   42 #include <sys/lock.h>
   43 #include <sys/malloc.h>
   44 #include <sys/mbuf.h>
   45 #include <sys/mutex.h>
   46 #include <sys/priv.h>
   47 #include <sys/protosw.h>
   48 #include <sys/signalvar.h>
   49 #include <sys/socket.h>
   50 #include <sys/socketvar.h>
   51 #include <sys/sysctl.h>
   52 #include <sys/systm.h>
   53 
   54 #include <net/if.h>
   55 #include <net/vnet.h>
   56 #include <net/raw_cb.h>
   57 
   58 #include <netinet/in.h>
   59 
   60 #include <net/pfkeyv2.h>
   61 #include <netipsec/key.h>
   62 #include <netipsec/keysock.h>
   63 #include <netipsec/key_debug.h>
   64 #include <netipsec/ipsec.h>
   65 
   66 #include <machine/stdarg.h>
   67 
   68 struct key_cb {
   69         int key_count;
   70         int any_count;
   71 };
   72 static VNET_DEFINE(struct key_cb, key_cb);
   73 #define V_key_cb                VNET(key_cb)
   74 
   75 static struct sockaddr key_src = { 2, PF_KEY, };
   76 
   77 static int key_sendup0(struct rawcb *, struct mbuf *, int);
   78 
   79 VNET_PCPUSTAT_DEFINE(struct pfkeystat, pfkeystat);
   80 VNET_PCPUSTAT_SYSINIT(pfkeystat);
   81 
   82 #ifdef VIMAGE
   83 VNET_PCPUSTAT_SYSUNINIT(pfkeystat);
   84 #endif /* VIMAGE */
   85 
   86 /*
   87  * key_output()
   88  */
   89 int
   90 key_output(struct mbuf *m, struct socket *so, ...)
   91 {
   92         struct sadb_msg *msg;
   93         int len, error = 0;
   94 
   95         if (m == NULL)
   96                 panic("%s: NULL pointer was passed.\n", __func__);
   97 
   98         PFKEYSTAT_INC(out_total);
   99         PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
  100 
  101         len = m->m_pkthdr.len;
  102         if (len < sizeof(struct sadb_msg)) {
  103                 PFKEYSTAT_INC(out_tooshort);
  104                 error = EINVAL;
  105                 goto end;
  106         }
  107 
  108         if (m->m_len < sizeof(struct sadb_msg)) {
  109                 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == NULL) {
  110                         PFKEYSTAT_INC(out_nomem);
  111                         error = ENOBUFS;
  112                         goto end;
  113                 }
  114         }
  115 
  116         M_ASSERTPKTHDR(m);
  117 
  118         KEYDBG(KEY_DUMP, kdebug_mbuf(m));
  119 
  120         msg = mtod(m, struct sadb_msg *);
  121         PFKEYSTAT_INC(out_msgtype[msg->sadb_msg_type]);
  122         if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
  123                 PFKEYSTAT_INC(out_invlen);
  124                 error = EINVAL;
  125                 goto end;
  126         }
  127 
  128         error = key_parse(m, so);
  129         m = NULL;
  130 end:
  131         if (m)
  132                 m_freem(m);
  133         return error;
  134 }
  135 
  136 /*
  137  * send message to the socket.
  138  */
  139 static int
  140 key_sendup0(struct rawcb *rp, struct mbuf *m, int promisc)
  141 {
  142         int error;
  143 
  144         if (promisc) {
  145                 struct sadb_msg *pmsg;
  146 
  147                 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
  148                 if (m == NULL) {
  149                         PFKEYSTAT_INC(in_nomem);
  150                         return (ENOBUFS);
  151                 }
  152                 pmsg = mtod(m, struct sadb_msg *);
  153                 bzero(pmsg, sizeof(*pmsg));
  154                 pmsg->sadb_msg_version = PF_KEY_V2;
  155                 pmsg->sadb_msg_type = SADB_X_PROMISC;
  156                 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
  157                 /* pid and seq? */
  158 
  159                 PFKEYSTAT_INC(in_msgtype[pmsg->sadb_msg_type]);
  160         }
  161 
  162         if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
  163             m, NULL)) {
  164                 PFKEYSTAT_INC(in_nomem);
  165                 m_freem(m);
  166                 error = ENOBUFS;
  167         } else
  168                 error = 0;
  169         sorwakeup(rp->rcb_socket);
  170         return error;
  171 }
  172 
  173 /* XXX this interface should be obsoleted. */
  174 int
  175 key_sendup(struct socket *so, struct sadb_msg *msg, u_int len, int target)
  176 {
  177         struct mbuf *m, *n, *mprev;
  178         int tlen;
  179 
  180         /* sanity check */
  181         if (so == NULL || msg == NULL)
  182                 panic("%s: NULL pointer was passed.\n", __func__);
  183 
  184         KEYDBG(KEY_DUMP,
  185             printf("%s: \n", __func__);
  186             kdebug_sadb(msg));
  187 
  188         /*
  189          * we increment statistics here, just in case we have ENOBUFS
  190          * in this function.
  191          */
  192         PFKEYSTAT_INC(in_total);
  193         PFKEYSTAT_ADD(in_bytes, len);
  194         PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
  195 
  196         /*
  197          * Get mbuf chain whenever possible (not clusters),
  198          * to save socket buffer.  We'll be generating many SADB_ACQUIRE
  199          * messages to listening key sockets.  If we simply allocate clusters,
  200          * sbappendaddr() will raise ENOBUFS due to too little sbspace().
  201          * sbspace() computes # of actual data bytes AND mbuf region.
  202          *
  203          * TODO: SADB_ACQUIRE filters should be implemented.
  204          */
  205         tlen = len;
  206         m = mprev = NULL;
  207         while (tlen > 0) {
  208                 if (tlen == len) {
  209                         MGETHDR(n, M_NOWAIT, MT_DATA);
  210                         if (n == NULL) {
  211                                 PFKEYSTAT_INC(in_nomem);
  212                                 return ENOBUFS;
  213                         }
  214                         n->m_len = MHLEN;
  215                 } else {
  216                         MGET(n, M_NOWAIT, MT_DATA);
  217                         if (n == NULL) {
  218                                 PFKEYSTAT_INC(in_nomem);
  219                                 return ENOBUFS;
  220                         }
  221                         n->m_len = MLEN;
  222                 }
  223                 if (tlen >= MCLBYTES) { /*XXX better threshold? */
  224                         if (!(MCLGET(n, M_NOWAIT))) {
  225                                 m_free(n);
  226                                 m_freem(m);
  227                                 PFKEYSTAT_INC(in_nomem);
  228                                 return ENOBUFS;
  229                         }
  230                         n->m_len = MCLBYTES;
  231                 }
  232 
  233                 if (tlen < n->m_len)
  234                         n->m_len = tlen;
  235                 n->m_next = NULL;
  236                 if (m == NULL)
  237                         m = mprev = n;
  238                 else {
  239                         mprev->m_next = n;
  240                         mprev = n;
  241                 }
  242                 tlen -= n->m_len;
  243                 n = NULL;
  244         }
  245         m->m_pkthdr.len = len;
  246         m->m_pkthdr.rcvif = NULL;
  247         m_copyback(m, 0, len, (caddr_t)msg);
  248 
  249         /* avoid duplicated statistics */
  250         PFKEYSTAT_ADD(in_total, -1);
  251         PFKEYSTAT_ADD(in_bytes, -len);
  252         PFKEYSTAT_ADD(in_msgtype[msg->sadb_msg_type], -1);
  253 
  254         return key_sendup_mbuf(so, m, target);
  255 }
  256 
  257 /* so can be NULL if target != KEY_SENDUP_ONE */
  258 int
  259 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
  260 {
  261         struct mbuf *n;
  262         struct keycb *kp;
  263         int sendup;
  264         struct rawcb *rp;
  265         int error = 0;
  266 
  267         if (m == NULL)
  268                 panic("key_sendup_mbuf: NULL pointer was passed.\n");
  269         if (so == NULL && target == KEY_SENDUP_ONE)
  270                 panic("%s: NULL pointer was passed.\n", __func__);
  271 
  272         PFKEYSTAT_INC(in_total);
  273         PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
  274         if (m->m_len < sizeof(struct sadb_msg)) {
  275                 m = m_pullup(m, sizeof(struct sadb_msg));
  276                 if (m == NULL) {
  277                         PFKEYSTAT_INC(in_nomem);
  278                         return ENOBUFS;
  279                 }
  280         }
  281         if (m->m_len >= sizeof(struct sadb_msg)) {
  282                 struct sadb_msg *msg;
  283                 msg = mtod(m, struct sadb_msg *);
  284                 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
  285         }
  286         mtx_lock(&rawcb_mtx);
  287         LIST_FOREACH(rp, &V_rawcb_list, list)
  288         {
  289                 if (rp->rcb_proto.sp_family != PF_KEY)
  290                         continue;
  291                 if (rp->rcb_proto.sp_protocol
  292                  && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
  293                         continue;
  294                 }
  295 
  296                 kp = (struct keycb *)rp;
  297 
  298                 /*
  299                  * If you are in promiscuous mode, and when you get broadcasted
  300                  * reply, you'll get two PF_KEY messages.
  301                  * (based on pf_key@inner.net message on 14 Oct 1998)
  302                  */
  303                 if (((struct keycb *)rp)->kp_promisc) {
  304                         if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
  305                                 (void)key_sendup0(rp, n, 1);
  306                                 n = NULL;
  307                         }
  308                 }
  309 
  310                 /* the exact target will be processed later */
  311                 if (so && sotorawcb(so) == rp)
  312                         continue;
  313 
  314                 sendup = 0;
  315                 switch (target) {
  316                 case KEY_SENDUP_ONE:
  317                         /* the statement has no effect */
  318                         if (so && sotorawcb(so) == rp)
  319                                 sendup++;
  320                         break;
  321                 case KEY_SENDUP_ALL:
  322                         sendup++;
  323                         break;
  324                 case KEY_SENDUP_REGISTERED:
  325                         if (kp->kp_registered)
  326                                 sendup++;
  327                         break;
  328                 }
  329                 PFKEYSTAT_INC(in_msgtarget[target]);
  330 
  331                 if (!sendup)
  332                         continue;
  333 
  334                 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
  335                         m_freem(m);
  336                         PFKEYSTAT_INC(in_nomem);
  337                         mtx_unlock(&rawcb_mtx);
  338                         return ENOBUFS;
  339                 }
  340 
  341                 if ((error = key_sendup0(rp, n, 0)) != 0) {
  342                         m_freem(m);
  343                         mtx_unlock(&rawcb_mtx);
  344                         return error;
  345                 }
  346 
  347                 n = NULL;
  348         }
  349 
  350         if (so) {
  351                 error = key_sendup0(sotorawcb(so), m, 0);
  352                 m = NULL;
  353         } else {
  354                 error = 0;
  355                 m_freem(m);
  356         }
  357         mtx_unlock(&rawcb_mtx);
  358         return error;
  359 }
  360 
  361 /*
  362  * key_abort()
  363  * derived from net/rtsock.c:rts_abort()
  364  */
  365 static void
  366 key_abort(struct socket *so)
  367 {
  368         raw_usrreqs.pru_abort(so);
  369 }
  370 
  371 /*
  372  * key_attach()
  373  * derived from net/rtsock.c:rts_attach()
  374  */
  375 static int
  376 key_attach(struct socket *so, int proto, struct thread *td)
  377 {
  378         struct keycb *kp;
  379         int error;
  380 
  381         KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
  382 
  383         if (td != NULL) {
  384                 error = priv_check(td, PRIV_NET_RAW);
  385                 if (error)
  386                         return error;
  387         }
  388 
  389         /* XXX */
  390         kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO); 
  391         if (kp == NULL)
  392                 return ENOBUFS;
  393 
  394         so->so_pcb = (caddr_t)kp;
  395         error = raw_attach(so, proto);
  396         kp = (struct keycb *)sotorawcb(so);
  397         if (error) {
  398                 free(kp, M_PCB);
  399                 so->so_pcb = (caddr_t) 0;
  400                 return error;
  401         }
  402 
  403         kp->kp_promisc = kp->kp_registered = 0;
  404 
  405         if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
  406                 V_key_cb.key_count++;
  407         V_key_cb.any_count++;
  408         soisconnected(so);
  409         so->so_options |= SO_USELOOPBACK;
  410 
  411         return 0;
  412 }
  413 
  414 /*
  415  * key_bind()
  416  * derived from net/rtsock.c:rts_bind()
  417  */
  418 static int
  419 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
  420 {
  421   return EINVAL;
  422 }
  423 
  424 /*
  425  * key_close()
  426  * derived from net/rtsock.c:rts_close().
  427  */
  428 static void
  429 key_close(struct socket *so)
  430 {
  431 
  432         raw_usrreqs.pru_close(so);
  433 }
  434 
  435 /*
  436  * key_connect()
  437  * derived from net/rtsock.c:rts_connect()
  438  */
  439 static int
  440 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
  441 {
  442         return EINVAL;
  443 }
  444 
  445 /*
  446  * key_detach()
  447  * derived from net/rtsock.c:rts_detach()
  448  */
  449 static void
  450 key_detach(struct socket *so)
  451 {
  452         struct keycb *kp = (struct keycb *)sotorawcb(so);
  453 
  454         KASSERT(kp != NULL, ("key_detach: kp == NULL"));
  455         if (kp->kp_raw.rcb_proto.sp_protocol
  456             == PF_KEY) /* XXX: AF_KEY */
  457                 V_key_cb.key_count--;
  458         V_key_cb.any_count--;
  459 
  460         key_freereg(so);
  461         raw_usrreqs.pru_detach(so);
  462 }
  463 
  464 /*
  465  * key_disconnect()
  466  * derived from net/rtsock.c:key_disconnect()
  467  */
  468 static int
  469 key_disconnect(struct socket *so)
  470 {
  471         return(raw_usrreqs.pru_disconnect(so));
  472 }
  473 
  474 /*
  475  * key_peeraddr()
  476  * derived from net/rtsock.c:rts_peeraddr()
  477  */
  478 static int
  479 key_peeraddr(struct socket *so, struct sockaddr **nam)
  480 {
  481         return(raw_usrreqs.pru_peeraddr(so, nam));
  482 }
  483 
  484 /*
  485  * key_send()
  486  * derived from net/rtsock.c:rts_send()
  487  */
  488 static int
  489 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
  490          struct mbuf *control, struct thread *td)
  491 {
  492         return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
  493 }
  494 
  495 /*
  496  * key_shutdown()
  497  * derived from net/rtsock.c:rts_shutdown()
  498  */
  499 static int
  500 key_shutdown(struct socket *so)
  501 {
  502         return(raw_usrreqs.pru_shutdown(so));
  503 }
  504 
  505 /*
  506  * key_sockaddr()
  507  * derived from net/rtsock.c:rts_sockaddr()
  508  */
  509 static int
  510 key_sockaddr(struct socket *so, struct sockaddr **nam)
  511 {
  512         return(raw_usrreqs.pru_sockaddr(so, nam));
  513 }
  514 
  515 struct pr_usrreqs key_usrreqs = {
  516         .pru_abort =            key_abort,
  517         .pru_attach =           key_attach,
  518         .pru_bind =             key_bind,
  519         .pru_connect =          key_connect,
  520         .pru_detach =           key_detach,
  521         .pru_disconnect =       key_disconnect,
  522         .pru_peeraddr =         key_peeraddr,
  523         .pru_send =             key_send,
  524         .pru_shutdown =         key_shutdown,
  525         .pru_sockaddr =         key_sockaddr,
  526         .pru_close =            key_close,
  527 };
  528 
  529 /* sysctl */
  530 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
  531 
  532 /*
  533  * Definitions of protocols supported in the KEY domain.
  534  */
  535 
  536 extern struct domain keydomain;
  537 
  538 struct protosw keysw[] = {
  539 {
  540         .pr_type =              SOCK_RAW,
  541         .pr_domain =            &keydomain,
  542         .pr_protocol =          PF_KEY_V2,
  543         .pr_flags =             PR_ATOMIC|PR_ADDR,
  544         .pr_output =            key_output,
  545         .pr_ctlinput =          raw_ctlinput,
  546         .pr_init =              raw_init,
  547         .pr_usrreqs =           &key_usrreqs
  548 }
  549 };
  550 
  551 static void
  552 key_init0(void)
  553 {
  554 
  555         bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
  556         key_init();
  557 }
  558 
  559 struct domain keydomain = {
  560         .dom_family =           PF_KEY,
  561         .dom_name =             "key",
  562         .dom_init =             key_init0,
  563 #ifdef VIMAGE
  564         .dom_destroy =          key_destroy,
  565 #endif
  566         .dom_protosw =          keysw,
  567         .dom_protoswNPROTOSW =  &keysw[nitems(keysw)]
  568 };
  569 
  570 VNET_DOMAIN_SET(key);

Cache object: 83349e61bd602124469f911cd0fe41b5


[ 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.