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/raw_ip6.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 /*
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the project nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $
   30  */
   31 
   32 /*
   33  * Copyright (c) 1982, 1986, 1988, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 3. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)raw_ip.c    8.2 (Berkeley) 1/4/94
   61  */
   62 
   63 #include "opt_ipsec.h"
   64 #include "opt_inet6.h"
   65 
   66 #include <sys/param.h>
   67 #include <sys/malloc.h>
   68 #include <sys/proc.h>
   69 #include <sys/priv.h>
   70 #include <sys/mbuf.h>
   71 #include <sys/socket.h>
   72 #include <sys/jail.h>
   73 #include <sys/protosw.h>
   74 #include <sys/socketvar.h>
   75 #include <sys/errno.h>
   76 #include <sys/systm.h>
   77 
   78 #include <sys/thread2.h>
   79 #include <sys/socketvar2.h>
   80 #include <sys/msgport2.h>
   81 
   82 #include <net/if.h>
   83 #include <net/route.h>
   84 #include <net/if_types.h>
   85 
   86 #include <netinet/in.h>
   87 #include <netinet/in_var.h>
   88 #include <netinet/in_systm.h>
   89 #include <netinet/ip6.h>
   90 #include <netinet6/ip6_var.h>
   91 #include <netinet6/ip6_mroute.h>
   92 #include <netinet/icmp6.h>
   93 #include <netinet/in_pcb.h>
   94 #include <netinet6/in6_pcb.h>
   95 #include <netinet6/nd6.h>
   96 #include <netinet6/ip6protosw.h>
   97 #ifdef ENABLE_DEFAULT_SCOPE
   98 #include <netinet6/scope6_var.h>
   99 #endif
  100 #include <netinet6/raw_ip6.h>
  101 
  102 #ifdef IPSEC
  103 #include <netinet6/ipsec.h>
  104 #include <netinet6/ipsec6.h>
  105 #endif /*IPSEC*/
  106 
  107 #ifdef FAST_IPSEC
  108 #include <netproto/ipsec/ipsec.h>
  109 #include <netproto/ipsec/ipsec6.h>
  110 #endif /* FAST_IPSEC */
  111 
  112 #include <machine/stdarg.h>
  113 
  114 #define satosin6(sa)    ((struct sockaddr_in6 *)(sa))
  115 #define ifatoia6(ifa)   ((struct in6_ifaddr *)(ifa))
  116 
  117 /*
  118  * Raw interface to IP6 protocol.
  119  */
  120 
  121 extern struct   inpcbinfo ripcbinfo;
  122 extern u_long   rip_sendspace;
  123 extern u_long   rip_recvspace;
  124 
  125 struct rip6stat rip6stat;
  126 
  127 /*
  128  * Setup generic address and protocol structures
  129  * for raw_input routine, then pass them along with
  130  * mbuf chain.
  131  */
  132 int
  133 rip6_input(struct mbuf **mp, int *offp, int proto)
  134 {
  135         struct mbuf *m = *mp;
  136         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
  137         struct inpcb *in6p;
  138         struct inpcb *last = NULL;
  139         struct mbuf *opts = NULL;
  140         struct sockaddr_in6 rip6src;
  141 
  142         rip6stat.rip6s_ipackets++;
  143 
  144         if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
  145                 /* XXX send icmp6 host/port unreach? */
  146                 m_freem(m);
  147                 return IPPROTO_DONE;
  148         }
  149 
  150         init_sin6(&rip6src, m); /* general init */
  151 
  152         LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
  153                 if (in6p->in6p_flags & INP_PLACEMARKER)
  154                         continue;
  155                 if (!(in6p->in6p_vflag & INP_IPV6))
  156                         continue;
  157                 if (in6p->in6p_ip6_nxt &&
  158                     in6p->in6p_ip6_nxt != proto)
  159                         continue;
  160                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
  161                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
  162                         continue;
  163                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
  164                     !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
  165                         continue;
  166                 if (in6p->in6p_cksum != -1) {
  167                         rip6stat.rip6s_isum++;
  168                         if (in6_cksum(m, ip6->ip6_nxt, *offp,
  169                             m->m_pkthdr.len - *offp)) {
  170                                 rip6stat.rip6s_badsum++;
  171                                 continue;
  172                         }
  173                 }
  174                 if (last) {
  175                         struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
  176 
  177 #ifdef IPSEC
  178                         /*
  179                          * Check AH/ESP integrity.
  180                          */
  181                         if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
  182                                 m_freem(n);
  183                                 ipsec6stat.in_polvio++;
  184                                 /* do not inject data into pcb */
  185                         } else
  186 #endif /*IPSEC*/
  187 #ifdef FAST_IPSEC
  188                         /*
  189                          * Check AH/ESP integrity.
  190                          */
  191                         if (n && ipsec6_in_reject(n, last)) {
  192                                 m_freem(n);
  193                                 /* do not inject data into pcb */
  194                         } else
  195 #endif /*FAST_IPSEC*/
  196                         if (n) {
  197                                 struct socket *so;
  198 
  199                                 so = last->in6p_socket;
  200                                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
  201                                     (so->so_options & SO_TIMESTAMP)) {
  202                                         ip6_savecontrol(last, &opts, ip6, n);
  203                                 }
  204                                 /* strip intermediate headers */
  205                                 m_adj(n, *offp);
  206                                 lwkt_gettoken(&so->so_rcv.ssb_token);
  207                                 if (ssb_appendaddr(&so->so_rcv,
  208                                                 (struct sockaddr *)&rip6src,
  209                                                  n, opts) == 0) {
  210                                         m_freem(n);
  211                                         if (opts)
  212                                                 m_freem(opts);
  213                                         rip6stat.rip6s_fullsock++;
  214                                 } else {
  215                                         sorwakeup(so);
  216                                 }
  217                                 lwkt_reltoken(&so->so_rcv.ssb_token);
  218                                 opts = NULL;
  219                         }
  220                 }
  221                 last = in6p;
  222         }
  223 #ifdef IPSEC
  224         /*
  225          * Check AH/ESP integrity.
  226          */
  227         if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
  228                 m_freem(m);
  229                 ipsec6stat.in_polvio++;
  230                 ip6stat.ip6s_delivered--;
  231                 /* do not inject data into pcb */
  232         } else
  233 #endif /*IPSEC*/
  234 #ifdef FAST_IPSEC
  235         /*
  236          * Check AH/ESP integrity.
  237          */
  238         if (last && ipsec6_in_reject(m, last)) {
  239                 m_freem(m);
  240                 ip6stat.ip6s_delivered--;
  241                 /* do not inject data into pcb */
  242         } else
  243 #endif /*FAST_IPSEC*/
  244         if (last) {
  245                 struct socket *so;
  246 
  247                 so = last->in6p_socket;
  248                 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
  249                     (so->so_options & SO_TIMESTAMP)) {
  250                         ip6_savecontrol(last, &opts, ip6, m);
  251                 }
  252                 /* strip intermediate headers */
  253                 m_adj(m, *offp);
  254                 lwkt_gettoken(&so->so_rcv.ssb_token);
  255                 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
  256                                    m, opts) == 0) {
  257                         m_freem(m);
  258                         if (opts)
  259                                 m_freem(opts);
  260                         rip6stat.rip6s_fullsock++;
  261                 } else {
  262                         sorwakeup(so);
  263                 }
  264                 lwkt_reltoken(&so->so_rcv.ssb_token);
  265         } else {
  266                 rip6stat.rip6s_nosock++;
  267                 if (m->m_flags & M_MCAST)
  268                         rip6stat.rip6s_nosockmcast++;
  269                 if (proto == IPPROTO_NONE)
  270                         m_freem(m);
  271                 else {
  272                         char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
  273                         icmp6_error(m, ICMP6_PARAM_PROB,
  274                                     ICMP6_PARAMPROB_NEXTHEADER,
  275                                     prvnxtp - mtod(m, char *));
  276                 }
  277                 ip6stat.ip6s_delivered--;
  278         }
  279         return IPPROTO_DONE;
  280 }
  281 
  282 void
  283 rip6_ctlinput(netmsg_t msg)
  284 {
  285         int cmd = msg->ctlinput.nm_cmd;
  286         struct sockaddr *sa = msg->ctlinput.nm_arg;
  287         void *d = msg->ctlinput.nm_extra;
  288         struct ip6ctlparam *ip6cp = NULL;
  289         const struct sockaddr_in6 *sa6_src = NULL;
  290         void (*notify) (struct inpcb *, int) = in6_rtchange;
  291 
  292         if (sa->sa_family != AF_INET6 ||
  293             sa->sa_len != sizeof(struct sockaddr_in6))
  294                 goto out;
  295 
  296         if ((unsigned)cmd >= PRC_NCMDS)
  297                 goto out;
  298         if (PRC_IS_REDIRECT(cmd))
  299                 notify = in6_rtchange, d = NULL;
  300         else if (cmd == PRC_HOSTDEAD)
  301                 d = NULL;
  302         else if (inet6ctlerrmap[cmd] == 0)
  303                 goto out;
  304 
  305         /* if the parameter is from icmp6, decode it. */
  306         if (d != NULL) {
  307                 ip6cp = (struct ip6ctlparam *)d;
  308                 sa6_src = ip6cp->ip6c_src;
  309         } else {
  310                 sa6_src = &sa6_any;
  311         }
  312 
  313         in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
  314                       (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
  315 out:
  316         lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
  317 }
  318 
  319 /*
  320  * Generate IPv6 header and pass packet to ip6_output.
  321  * Tack on options user may have setup with control call.
  322  */
  323 int
  324 rip6_output(struct mbuf *m, struct socket *so, ...)
  325 {
  326         struct sockaddr_in6 *dstsock;
  327         struct mbuf *control;
  328         struct in6_addr *dst;
  329         struct ip6_hdr *ip6;
  330         struct inpcb *in6p;
  331         u_int   plen = m->m_pkthdr.len;
  332         int error = 0;
  333         struct ip6_pktopts opt, *optp = NULL;
  334         struct ifnet *oifp = NULL;
  335         int type = 0, code = 0;         /* for ICMPv6 output statistics only */
  336         int priv = 0;
  337         __va_list ap;
  338 
  339         __va_start(ap, so);
  340         dstsock = __va_arg(ap, struct sockaddr_in6 *);
  341         control = __va_arg(ap, struct mbuf *);
  342         __va_end(ap);
  343 
  344         in6p = so->so_pcb;
  345 
  346         priv = 0;
  347         if (so->so_cred->cr_uid == 0)
  348                 priv = 1;
  349         dst = &dstsock->sin6_addr;
  350         if (control) {
  351                 if ((error = ip6_setpktoptions(control, &opt,
  352                     in6p->in6p_outputopts, 
  353                     so->so_proto->pr_protocol, priv)) != 0)
  354                         goto bad;
  355                 optp = &opt;
  356         } else
  357                 optp = in6p->in6p_outputopts;
  358 
  359         /*
  360          * For an ICMPv6 packet, we should know its type and code
  361          * to update statistics.
  362          */
  363         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
  364                 struct icmp6_hdr *icmp6;
  365                 if (m->m_len < sizeof(struct icmp6_hdr) &&
  366                     (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
  367                         error = ENOBUFS;
  368                         goto bad;
  369                 }
  370                 icmp6 = mtod(m, struct icmp6_hdr *);
  371                 type = icmp6->icmp6_type;
  372                 code = icmp6->icmp6_code;
  373         }
  374 
  375         M_PREPEND(m, sizeof(*ip6), MB_WAIT);
  376         ip6 = mtod(m, struct ip6_hdr *);
  377 
  378         /*
  379          * Next header might not be ICMP6 but use its pseudo header anyway.
  380          */
  381         ip6->ip6_dst = *dst;
  382 
  383         /*
  384          * If the scope of the destination is link-local, embed the interface
  385          * index in the address.
  386          *
  387          * XXX advanced-api value overrides sin6_scope_id
  388          */
  389         if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
  390                 struct in6_pktinfo *pi;
  391 
  392                 /*
  393                  * XXX Boundary check is assumed to be already done in
  394                  * ip6_setpktoptions().
  395                  */
  396                 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
  397                         ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
  398                         oifp = ifindex2ifnet[pi->ipi6_ifindex];
  399                 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
  400                          in6p->in6p_moptions &&
  401                          in6p->in6p_moptions->im6o_multicast_ifp) {
  402                         oifp = in6p->in6p_moptions->im6o_multicast_ifp;
  403                         ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
  404                 } else if (dstsock->sin6_scope_id) {
  405                         /* boundary check */
  406                         if (dstsock->sin6_scope_id < 0
  407                          || if_index < dstsock->sin6_scope_id) {
  408                                 error = ENXIO;  /* XXX EINVAL? */
  409                                 goto bad;
  410                         }
  411                         ip6->ip6_dst.s6_addr16[1]
  412                                 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
  413                 }
  414         }
  415 
  416         /*
  417          * Source address selection.
  418          */
  419         {
  420                 struct in6_addr *in6a;
  421 
  422                 if ((in6a = in6_selectsrc(dstsock, optp,
  423                                           in6p->in6p_moptions,
  424                                           &in6p->in6p_route,
  425                                           &in6p->in6p_laddr,
  426                                           &error, NULL)) == NULL) {
  427                         if (error == 0)
  428                                 error = EADDRNOTAVAIL;
  429                         goto bad;
  430                 }
  431                 ip6->ip6_src = *in6a;
  432                 if (in6p->in6p_route.ro_rt)
  433                         oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
  434         }
  435         ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
  436                 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
  437         ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
  438                 (IPV6_VERSION & IPV6_VERSION_MASK);
  439         /* ip6_plen will be filled in ip6_output, so not fill it here. */
  440         ip6->ip6_nxt = in6p->in6p_ip6_nxt;
  441         ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
  442 
  443         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
  444             in6p->in6p_cksum != -1) {
  445                 struct mbuf *n;
  446                 int off;
  447                 u_int16_t *p;
  448 
  449                 /* compute checksum */
  450                 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
  451                         off = offsetof(struct icmp6_hdr, icmp6_cksum);
  452                 else
  453                         off = in6p->in6p_cksum;
  454                 if (plen < off + 1) {
  455                         error = EINVAL;
  456                         goto bad;
  457                 }
  458                 off += sizeof(struct ip6_hdr);
  459 
  460                 n = m;
  461                 while (n && n->m_len <= off) {
  462                         off -= n->m_len;
  463                         n = n->m_next;
  464                 }
  465                 if (!n)
  466                         goto bad;
  467                 p = (u_int16_t *)(mtod(n, caddr_t) + off);
  468                 *p = 0;
  469                 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
  470         }
  471 
  472         error = ip6_output(m, optp, &in6p->in6p_route, 0,
  473                            in6p->in6p_moptions, &oifp, in6p);
  474         if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
  475                 if (oifp)
  476                         icmp6_ifoutstat_inc(oifp, type, code);
  477                 icmp6stat.icp6s_outhist[type]++;
  478         } else
  479                 rip6stat.rip6s_opackets++;
  480 
  481         goto freectl;
  482 
  483 bad:
  484         if (m)
  485                 m_freem(m);
  486 
  487 freectl:
  488         if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
  489                 RTFREE(optp->ip6po_route.ro_rt);
  490         if (control) {
  491                 if (optp == &opt)
  492                         ip6_clearpktopts(optp, -1);
  493                 m_freem(control);
  494         }
  495         return (error);
  496 }
  497 
  498 /*
  499  * Raw IPv6 socket option processing.
  500  */
  501 void
  502 rip6_ctloutput(netmsg_t msg)
  503 {
  504         struct socket *so = msg->ctloutput.base.nm_so;
  505         struct sockopt *sopt = msg->ctloutput.nm_sopt;
  506         int error;
  507 
  508         if (sopt->sopt_level == IPPROTO_ICMPV6) {
  509                 /*
  510                  * XXX: is it better to call icmp6_ctloutput() directly
  511                  * from protosw?
  512                  */
  513                 icmp6_ctloutput(msg);
  514                 /* msg invalid now */
  515                 return;
  516         }
  517         if (sopt->sopt_level != IPPROTO_IPV6) {
  518                 error = EINVAL;
  519                 goto out;
  520         }
  521 
  522         error = 0;
  523 
  524         switch (sopt->sopt_dir) {
  525         case SOPT_GET:
  526                 switch (sopt->sopt_name) {
  527                 case MRT6_INIT:
  528                 case MRT6_DONE:
  529                 case MRT6_ADD_MIF:
  530                 case MRT6_DEL_MIF:
  531                 case MRT6_ADD_MFC:
  532                 case MRT6_DEL_MFC:
  533                 case MRT6_PIM:
  534                         error = ip6_mrouter_get(so, sopt);
  535                         break;
  536                 case IPV6_CHECKSUM:
  537                         error = ip6_raw_ctloutput(so, sopt);
  538                         break;
  539                 default:
  540                         error = ip6_ctloutput(so, sopt);
  541                         break;
  542                 }
  543                 break;
  544 
  545         case SOPT_SET:
  546                 switch (sopt->sopt_name) {
  547                 case MRT6_INIT:
  548                 case MRT6_DONE:
  549                 case MRT6_ADD_MIF:
  550                 case MRT6_DEL_MIF:
  551                 case MRT6_ADD_MFC:
  552                 case MRT6_DEL_MFC:
  553                 case MRT6_PIM:
  554                         error = ip6_mrouter_set(so, sopt);
  555                         break;
  556                 case IPV6_CHECKSUM:
  557                         error = ip6_raw_ctloutput(so, sopt);
  558                         break;
  559                 default:
  560                         error = ip6_ctloutput(so, sopt);
  561                         break;
  562                 }
  563                 break;
  564         }
  565 out:
  566         lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
  567 }
  568 
  569 static void
  570 rip6_attach(netmsg_t msg)
  571 {
  572         struct socket *so = msg->attach.base.nm_so;
  573         int proto = msg->attach.nm_proto;
  574         struct pru_attach_info *ai = msg->attach.nm_ai;
  575         struct inpcb *inp;
  576         int error;
  577 
  578         inp = so->so_pcb;
  579         if (inp)
  580                 panic("rip6_attach");
  581         error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
  582         if (error)
  583                 goto out;
  584 
  585         error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
  586         if (error)
  587                 goto out;
  588         crit_enter();
  589         error = in_pcballoc(so, &ripcbinfo);
  590         crit_exit();
  591         if (error)
  592                 goto out;
  593         inp = (struct inpcb *)so->so_pcb;
  594         inp->inp_vflag |= INP_IPV6;
  595         inp->in6p_ip6_nxt = (long)proto;
  596         inp->in6p_hops = -1;    /* use kernel default */
  597         inp->in6p_cksum = -1;
  598         inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
  599                                       M_NOWAIT);
  600         if (inp->in6p_icmp6filt != NULL)
  601                 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
  602         error = 0;
  603 out:
  604         lwkt_replymsg(&msg->attach.base.lmsg, error);
  605 }
  606 
  607 static void
  608 rip6_detach(netmsg_t msg)
  609 {
  610         struct socket *so = msg->detach.base.nm_so;
  611         struct inpcb *inp;
  612 
  613         inp = so->so_pcb;
  614         if (inp == NULL)
  615                 panic("rip6_detach");
  616         /* xxx: RSVP */
  617         if (so == ip6_mrouter)
  618                 ip6_mrouter_done();
  619         if (inp->in6p_icmp6filt) {
  620                 kfree(inp->in6p_icmp6filt, M_PCB);
  621                 inp->in6p_icmp6filt = NULL;
  622         }
  623         in6_pcbdetach(inp);
  624         lwkt_replymsg(&msg->detach.base.lmsg, 0);
  625 }
  626 
  627 /*
  628  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
  629  *       will sofree() it when we return.
  630  */
  631 static void
  632 rip6_abort(netmsg_t msg)
  633 {
  634         soisdisconnected(msg->abort.base.nm_so);
  635         rip6_detach(msg);
  636         /* msg invalid now */
  637 }
  638 
  639 static void
  640 rip6_disconnect(netmsg_t msg)
  641 {
  642         struct socket *so = msg->disconnect.base.nm_so;
  643         struct inpcb *inp = so->so_pcb;
  644 
  645         if (so->so_state & SS_ISCONNECTED) {
  646                 inp->in6p_faddr = kin6addr_any;
  647                 soreference(so);
  648                 rip6_abort(msg);
  649                 /* msg invalid now */
  650                 sofree(so);
  651                 return;
  652         }
  653         lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
  654 }
  655 
  656 static void
  657 rip6_bind(netmsg_t msg)
  658 {
  659         struct socket *so = msg->bind.base.nm_so;
  660         struct sockaddr *nam = msg->bind.nm_nam;
  661         struct inpcb *inp = so->so_pcb;
  662         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
  663         struct ifaddr *ia = NULL;
  664         int error;
  665 
  666         if (nam->sa_len != sizeof(*addr)) {
  667                 error = EINVAL;
  668                 goto out;
  669         }
  670 
  671         if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
  672                 error = EADDRNOTAVAIL;
  673                 goto out;
  674         }
  675 #ifdef ENABLE_DEFAULT_SCOPE
  676         if (addr->sin6_scope_id == 0) { /* not change if specified  */
  677                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
  678         }
  679 #endif
  680         if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
  681             (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
  682                 error = EADDRNOTAVAIL;
  683                 goto out;
  684         }
  685         if (ia &&
  686             ((struct in6_ifaddr *)ia)->ia6_flags &
  687             (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
  688              IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
  689                 error = EADDRNOTAVAIL;
  690                 goto out;
  691         }
  692         inp->in6p_laddr = addr->sin6_addr;
  693         error = 0;
  694 out:
  695         lwkt_replymsg(&msg->bind.base.lmsg, error);
  696 }
  697 
  698 static void
  699 rip6_connect(netmsg_t msg)
  700 {
  701         struct socket *so = msg->connect.base.nm_so;
  702         struct sockaddr *nam = msg->connect.nm_nam;
  703         struct inpcb *inp = so->so_pcb;
  704         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
  705         struct in6_addr *in6a = NULL;
  706         int error = 0;
  707 #ifdef ENABLE_DEFAULT_SCOPE
  708         struct sockaddr_in6 tmp;
  709 #endif
  710 
  711         if (nam->sa_len != sizeof(*addr)) {
  712                 error = EINVAL;
  713                 goto out;
  714         }
  715         if (TAILQ_EMPTY(&ifnet)) {
  716                 error = EADDRNOTAVAIL;
  717                 goto out;
  718         }
  719         if (addr->sin6_family != AF_INET6) {
  720                 error = EAFNOSUPPORT;
  721                 goto out;
  722         }
  723 #ifdef ENABLE_DEFAULT_SCOPE
  724         if (addr->sin6_scope_id == 0) { /* not change if specified  */
  725                 /* avoid overwrites */
  726                 tmp = *addr;
  727                 addr = &tmp;
  728                 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
  729         }
  730 #endif
  731         /* Source address selection. XXX: need pcblookup? */
  732         in6a = in6_selectsrc(addr, inp->in6p_outputopts,
  733                              inp->in6p_moptions, &inp->in6p_route,
  734                              &inp->in6p_laddr, &error, NULL);
  735         if (in6a == NULL) {
  736                 if (error == 0)
  737                         error = EADDRNOTAVAIL;
  738         } else {
  739                 inp->in6p_laddr = *in6a;
  740                 inp->in6p_faddr = addr->sin6_addr;
  741                 soisconnected(so);
  742                 error = 0;
  743         }
  744 out:
  745         lwkt_replymsg(&msg->connect.base.lmsg, error);
  746 }
  747 
  748 static void
  749 rip6_shutdown(netmsg_t msg)
  750 {
  751         socantsendmore(msg->shutdown.base.nm_so);
  752         lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
  753 }
  754 
  755 static void
  756 rip6_send(netmsg_t msg)
  757 {
  758         struct socket *so = msg->send.base.nm_so;
  759         struct mbuf *m = msg->send.nm_m;
  760         struct sockaddr *nam = msg->send.nm_addr;
  761         struct mbuf *control = msg->send.nm_control;
  762         struct inpcb *inp = so->so_pcb;
  763         struct sockaddr_in6 tmp;
  764         struct sockaddr_in6 *dst;
  765         int error;
  766 
  767         /* always copy sockaddr to avoid overwrites */
  768         if (so->so_state & SS_ISCONNECTED) {
  769                 if (nam) {
  770                         m_freem(m);
  771                         error = EISCONN;
  772                         goto out;
  773                 }
  774                 /* XXX */
  775                 bzero(&tmp, sizeof(tmp));
  776                 tmp.sin6_family = AF_INET6;
  777                 tmp.sin6_len = sizeof(struct sockaddr_in6);
  778                 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
  779                       sizeof(struct in6_addr));
  780                 dst = &tmp;
  781         } else {
  782                 if (nam == NULL) {
  783                         m_freem(m);
  784                         error = ENOTCONN;
  785                         goto out;
  786                 }
  787                 tmp = *(struct sockaddr_in6 *)nam;
  788                 dst = &tmp;
  789         }
  790 #ifdef ENABLE_DEFAULT_SCOPE
  791         if (dst->sin6_scope_id == 0) {  /* not change if specified  */
  792                 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
  793         }
  794 #endif
  795         error = rip6_output(m, so, dst, control);
  796 out:
  797         lwkt_replymsg(&msg->send.base.lmsg, error);
  798 }
  799 
  800 struct pr_usrreqs rip6_usrreqs = {
  801         .pru_abort = rip6_abort,
  802         .pru_accept = pr_generic_notsupp,
  803         .pru_attach = rip6_attach,
  804         .pru_bind = rip6_bind,
  805         .pru_connect = rip6_connect,
  806         .pru_connect2 = pr_generic_notsupp,
  807         .pru_control = in6_control_dispatch,
  808         .pru_detach = rip6_detach,
  809         .pru_disconnect = rip6_disconnect,
  810         .pru_listen = pr_generic_notsupp,
  811         .pru_peeraddr = in6_setpeeraddr_dispatch,
  812         .pru_rcvd = pr_generic_notsupp,
  813         .pru_rcvoob = pr_generic_notsupp,
  814         .pru_send = rip6_send,
  815         .pru_sense = pru_sense_null,
  816         .pru_shutdown = rip6_shutdown,
  817         .pru_sockaddr = in6_setsockaddr_dispatch,
  818         .pru_sosend = sosend,
  819         .pru_soreceive = soreceive
  820 };

Cache object: a6a04ccf289e2ae4f2456bcde08a69ce


[ 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.