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/udp6_usrreq.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 /*      $NetBSD: udp6_usrreq.c,v 1.75 2006/07/23 22:06:13 ad Exp $      */
    2 /*      $KAME: udp6_usrreq.c,v 1.86 2001/05/27 17:33:00 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 /*
   34  * Copyright (c) 1982, 1986, 1989, 1993
   35  *      The Regents of the University of California.  All rights reserved.
   36  *
   37  * Redistribution and use in source and binary forms, with or without
   38  * modification, are permitted provided that the following conditions
   39  * are met:
   40  * 1. Redistributions of source code must retain the above copyright
   41  *    notice, this list of conditions and the following disclaimer.
   42  * 2. Redistributions in binary form must reproduce the above copyright
   43  *    notice, this list of conditions and the following disclaimer in the
   44  *    documentation and/or other materials provided with the distribution.
   45  * 3. Neither the name of the University nor the names of its contributors
   46  *    may be used to endorse or promote products derived from this software
   47  *    without specific prior written permission.
   48  *
   49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   59  * SUCH DAMAGE.
   60  *
   61  *      @(#)udp_var.h   8.1 (Berkeley) 6/10/93
   62  */
   63 
   64 #include <sys/cdefs.h>
   65 __KERNEL_RCSID(0, "$NetBSD: udp6_usrreq.c,v 1.75 2006/07/23 22:06:13 ad Exp $");
   66 
   67 #include <sys/param.h>
   68 #include <sys/malloc.h>
   69 #include <sys/mbuf.h>
   70 #include <sys/protosw.h>
   71 #include <sys/socket.h>
   72 #include <sys/socketvar.h>
   73 #include <sys/errno.h>
   74 #include <sys/stat.h>
   75 #include <sys/systm.h>
   76 #include <sys/proc.h>
   77 #include <sys/syslog.h>
   78 #include <sys/sysctl.h>
   79 
   80 #include <net/if.h>
   81 #include <net/route.h>
   82 #include <net/if_types.h>
   83 
   84 #include <netinet/in.h>
   85 #include <netinet/in_var.h>
   86 #include <netinet/in_systm.h>
   87 #include <netinet/ip.h>
   88 #include <netinet/ip_var.h>
   89 #include <netinet/in_pcb.h>
   90 #include <netinet/udp.h>
   91 #include <netinet/udp_var.h>
   92 #include <netinet/ip6.h>
   93 #include <netinet6/ip6_var.h>
   94 #include <netinet6/in6_pcb.h>
   95 #include <netinet/icmp6.h>
   96 #include <netinet6/udp6_var.h>
   97 #include <netinet6/ip6protosw.h>
   98 #include <netinet/in_offload.h>
   99 
  100 #include "faith.h"
  101 #if defined(NFAITH) && NFAITH > 0
  102 #include <net/if_faith.h>
  103 #endif
  104 
  105 /*
  106  * UDP protocol implementation.
  107  * Per RFC 768, August, 1980.
  108  */
  109 
  110 extern struct inpcbtable udbtable;
  111 struct  udp6stat udp6stat;
  112 
  113 static  void udp6_notify __P((struct in6pcb *, int));
  114 
  115 void
  116 udp6_init()
  117 {
  118         /* initialization done in udp_input() due to initialization order */
  119 }
  120 
  121 /*
  122  * Notify a udp user of an asynchronous error;
  123  * just wake up so that he can collect error status.
  124  */
  125 static  void
  126 udp6_notify(in6p, errno)
  127         struct in6pcb *in6p;
  128         int errno;
  129 {
  130         in6p->in6p_socket->so_error = errno;
  131         sorwakeup(in6p->in6p_socket);
  132         sowwakeup(in6p->in6p_socket);
  133 }
  134 
  135 void
  136 udp6_ctlinput(cmd, sa, d)
  137         int cmd;
  138         struct sockaddr *sa;
  139         void *d;
  140 {
  141         struct udphdr uh;
  142         struct ip6_hdr *ip6;
  143         struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
  144         struct mbuf *m;
  145         int off;
  146         void *cmdarg;
  147         struct ip6ctlparam *ip6cp = NULL;
  148         const struct sockaddr_in6 *sa6_src = NULL;
  149         void (*notify) __P((struct in6pcb *, int)) = udp6_notify;
  150         struct udp_portonly {
  151                 u_int16_t uh_sport;
  152                 u_int16_t uh_dport;
  153         } *uhp;
  154 
  155         if (sa->sa_family != AF_INET6 ||
  156             sa->sa_len != sizeof(struct sockaddr_in6))
  157                 return;
  158 
  159         if ((unsigned)cmd >= PRC_NCMDS)
  160                 return;
  161         if (PRC_IS_REDIRECT(cmd))
  162                 notify = in6_rtchange, d = NULL;
  163         else if (cmd == PRC_HOSTDEAD)
  164                 d = NULL;
  165         else if (cmd == PRC_MSGSIZE) {
  166                 /* special code is present, see below */
  167                 notify = in6_rtchange;
  168         }
  169         else if (inet6ctlerrmap[cmd] == 0)
  170                 return;
  171 
  172         /* if the parameter is from icmp6, decode it. */
  173         if (d != NULL) {
  174                 ip6cp = (struct ip6ctlparam *)d;
  175                 m = ip6cp->ip6c_m;
  176                 ip6 = ip6cp->ip6c_ip6;
  177                 off = ip6cp->ip6c_off;
  178                 cmdarg = ip6cp->ip6c_cmdarg;
  179                 sa6_src = ip6cp->ip6c_src;
  180         } else {
  181                 m = NULL;
  182                 ip6 = NULL;
  183                 cmdarg = NULL;
  184                 sa6_src = &sa6_any;
  185                 off = 0;
  186         }
  187 
  188         if (ip6) {
  189                 /*
  190                  * XXX: We assume that when IPV6 is non NULL,
  191                  * M and OFF are valid.
  192                  */
  193 
  194                 /* check if we can safely examine src and dst ports */
  195                 if (m->m_pkthdr.len < off + sizeof(*uhp)) {
  196                         if (cmd == PRC_MSGSIZE)
  197                                 icmp6_mtudisc_update((struct ip6ctlparam *)d, 0);
  198                         return;
  199                 }
  200 
  201                 bzero(&uh, sizeof(uh));
  202                 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
  203 
  204                 if (cmd == PRC_MSGSIZE) {
  205                         int valid = 0;
  206 
  207                         /*
  208                          * Check to see if we have a valid UDP socket
  209                          * corresponding to the address in the ICMPv6 message
  210                          * payload.
  211                          */
  212                         if (in6_pcblookup_connect(&udbtable, &sa6->sin6_addr,
  213                             uh.uh_dport, (const struct in6_addr *)&sa6_src->sin6_addr,
  214                             uh.uh_sport, 0))
  215                                 valid++;
  216 #if 0
  217                         /*
  218                          * As the use of sendto(2) is fairly popular,
  219                          * we may want to allow non-connected pcb too.
  220                          * But it could be too weak against attacks...
  221                          * We should at least check if the local address (= s)
  222                          * is really ours.
  223                          */
  224                         else if (in6_pcblookup_bind(&udbtable, &sa6->sin6_addr,
  225                             uh.uh_dport, 0))
  226                                 valid++;
  227 #endif
  228 
  229                         /*
  230                          * Depending on the value of "valid" and routing table
  231                          * size (mtudisc_{hi,lo}wat), we will:
  232                          * - recalculate the new MTU and create the
  233                          *   corresponding routing entry, or
  234                          * - ignore the MTU change notification.
  235                          */
  236                         icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
  237 
  238                         /*
  239                          * regardless of if we called
  240                          * icmp6_mtudisc_update(), we need to call
  241                          * in6_pcbnotify(), to notify path MTU change
  242                          * to the userland (RFC3542), because some
  243                          * unconnected sockets may share the same
  244                          * destination and want to know the path MTU.
  245                          */
  246                 }
  247 
  248                 (void) in6_pcbnotify(&udbtable, sa, uh.uh_dport,
  249                     (const struct sockaddr *)sa6_src, uh.uh_sport, cmd, cmdarg,
  250                     notify);
  251         } else {
  252                 (void) in6_pcbnotify(&udbtable, sa, 0,
  253                     (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
  254         }
  255 }
  256 
  257 extern  int udp6_sendspace;
  258 extern  int udp6_recvspace;
  259 
  260 int
  261 udp6_usrreq(so, req, m, addr6, control, l)
  262         struct socket *so;
  263         int req;
  264         struct mbuf *m, *addr6, *control;
  265         struct lwp *l;
  266 {
  267         struct  in6pcb *in6p = sotoin6pcb(so);
  268         int     error = 0;
  269         int     s;
  270 
  271         /*
  272          * MAPPED_ADDR implementation info:
  273          *  Mapped addr support for PRU_CONTROL is not necessary.
  274          *  Because typical user of PRU_CONTROL is such as ifconfig,
  275          *  and they don't associate any addr to their socket.  Then
  276          *  socket family is only hint about the PRU_CONTROL'ed address
  277          *  family, especially when getting addrs from kernel.
  278          *  So AF_INET socket need to be used to control AF_INET addrs,
  279          *  and AF_INET6 socket for AF_INET6 addrs.
  280          */
  281         if (req == PRU_CONTROL)
  282                 return (in6_control(so, (u_long)m, (caddr_t)addr6,
  283                                    (struct ifnet *)control, l));
  284 
  285         if (req == PRU_PURGEIF) {
  286                 in6_pcbpurgeif0(&udbtable, (struct ifnet *)control);
  287                 in6_purgeif((struct ifnet *)control);
  288                 in6_pcbpurgeif(&udbtable, (struct ifnet *)control);
  289                 return (0);
  290         }
  291 
  292         if (in6p == NULL && req != PRU_ATTACH) {
  293                 error = EINVAL;
  294                 goto release;
  295         }
  296 
  297         switch (req) {
  298         case PRU_ATTACH:
  299                 /*
  300                  * MAPPED_ADDR implementation spec:
  301                  *  Always attach for IPv6,
  302                  *  and only when necessary for IPv4.
  303                  */
  304                 if (in6p != NULL) {
  305                         error = EINVAL;
  306                         break;
  307                 }
  308                 s = splsoftnet();
  309                 error = in6_pcballoc(so, &udbtable);
  310                 splx(s);
  311                 if (error)
  312                         break;
  313                 error = soreserve(so, udp6_sendspace, udp6_recvspace);
  314                 if (error)
  315                         break;
  316                 in6p = sotoin6pcb(so);
  317                 in6p->in6p_cksum = -1;  /* just to be sure */
  318                 break;
  319 
  320         case PRU_DETACH:
  321                 in6_pcbdetach(in6p);
  322                 break;
  323 
  324         case PRU_BIND:
  325                 s = splsoftnet();
  326                 error = in6_pcbbind(in6p, addr6, l);
  327                 splx(s);
  328                 break;
  329 
  330         case PRU_LISTEN:
  331                 error = EOPNOTSUPP;
  332                 break;
  333 
  334         case PRU_CONNECT:
  335                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  336                         error = EISCONN;
  337                         break;
  338                 }
  339                 s = splsoftnet();
  340                 error = in6_pcbconnect(in6p, addr6, l);
  341                 splx(s);
  342                 if (error == 0)
  343                         soisconnected(so);
  344                 break;
  345 
  346         case PRU_CONNECT2:
  347                 error = EOPNOTSUPP;
  348                 break;
  349 
  350         case PRU_ACCEPT:
  351                 error = EOPNOTSUPP;
  352                 break;
  353 
  354         case PRU_DISCONNECT:
  355                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  356                         error = ENOTCONN;
  357                         break;
  358                 }
  359                 s = splsoftnet();
  360                 in6_pcbdisconnect(in6p);
  361                 bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr));
  362                 splx(s);
  363                 so->so_state &= ~SS_ISCONNECTED;                /* XXX */
  364                 in6_pcbstate(in6p, IN6P_BOUND);         /* XXX */
  365                 break;
  366 
  367         case PRU_SHUTDOWN:
  368                 socantsendmore(so);
  369                 break;
  370 
  371         case PRU_SEND:
  372                 return (udp6_output(in6p, m, addr6, control, l));
  373 
  374         case PRU_ABORT:
  375                 soisdisconnected(so);
  376                 in6_pcbdetach(in6p);
  377                 break;
  378 
  379         case PRU_SOCKADDR:
  380                 in6_setsockaddr(in6p, addr6);
  381                 break;
  382 
  383         case PRU_PEERADDR:
  384                 in6_setpeeraddr(in6p, addr6);
  385                 break;
  386 
  387         case PRU_SENSE:
  388                 /*
  389                  * stat: don't bother with a blocksize
  390                  */
  391                 return (0);
  392 
  393         case PRU_SENDOOB:
  394         case PRU_FASTTIMO:
  395         case PRU_SLOWTIMO:
  396         case PRU_PROTORCV:
  397         case PRU_PROTOSEND:
  398                 error = EOPNOTSUPP;
  399                 break;
  400 
  401         case PRU_RCVD:
  402         case PRU_RCVOOB:
  403                 return (EOPNOTSUPP);    /* do not free mbuf's */
  404 
  405         default:
  406                 panic("udp6_usrreq");
  407         }
  408 
  409 release:
  410         if (control)
  411                 m_freem(control);
  412         if (m)
  413                 m_freem(m);
  414         return (error);
  415 }
  416 
  417 SYSCTL_SETUP(sysctl_net_inet6_udp6_setup, "sysctl net.inet6.udp6 subtree setup")
  418 {
  419         sysctl_createv(clog, 0, NULL, NULL,
  420                        CTLFLAG_PERMANENT,
  421                        CTLTYPE_NODE, "net", NULL,
  422                        NULL, 0, NULL, 0,
  423                        CTL_NET, CTL_EOL);
  424         sysctl_createv(clog, 0, NULL, NULL,
  425                        CTLFLAG_PERMANENT,
  426                        CTLTYPE_NODE, "inet6", NULL,
  427                        NULL, 0, NULL, 0,
  428                        CTL_NET, PF_INET6, CTL_EOL);
  429         sysctl_createv(clog, 0, NULL, NULL,
  430                        CTLFLAG_PERMANENT,
  431                        CTLTYPE_NODE, "udp6",
  432                        SYSCTL_DESCR("UDPv6 related settings"),
  433                        NULL, 0, NULL, 0,
  434                        CTL_NET, PF_INET6, IPPROTO_UDP, CTL_EOL);
  435 
  436         sysctl_createv(clog, 0, NULL, NULL,
  437                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  438                        CTLTYPE_INT, "sendspace",
  439                        SYSCTL_DESCR("Default UDP send buffer size"),
  440                        NULL, 0, &udp6_sendspace, 0,
  441                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_SENDSPACE,
  442                        CTL_EOL);
  443         sysctl_createv(clog, 0, NULL, NULL,
  444                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  445                        CTLTYPE_INT, "recvspace",
  446                        SYSCTL_DESCR("Default UDP receive buffer size"),
  447                        NULL, 0, &udp6_recvspace, 0,
  448                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_RECVSPACE,
  449                        CTL_EOL);
  450         sysctl_createv(clog, 0, NULL, NULL,
  451                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  452                        CTLTYPE_INT, "do_loopback_cksum",
  453                        SYSCTL_DESCR("Perform UDP checksum on loopback"),
  454                        NULL, 0, &udp_do_loopback_cksum, 0,
  455                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_LOOPBACKCKSUM,
  456                        CTL_EOL);
  457         sysctl_createv(clog, 0, NULL, NULL,
  458                        CTLFLAG_PERMANENT,
  459                        CTLTYPE_STRUCT, "pcblist",
  460                        SYSCTL_DESCR("UDP protocol control block list"),
  461                        sysctl_inpcblist, 0, &udbtable, 0,
  462                        CTL_NET, PF_INET6, IPPROTO_UDP, CTL_CREATE,
  463                        CTL_EOL);
  464         sysctl_createv(clog, 0, NULL, NULL,
  465                        CTLFLAG_PERMANENT,
  466                        CTLTYPE_STRUCT, "stats",
  467                        SYSCTL_DESCR("UDPv6 statistics"),
  468                        NULL, 0, &udp6stat, sizeof(udp6stat),
  469                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_STATS,
  470                        CTL_EOL);
  471 }

Cache object: 0118683be44f94007c6d4664598b54ec


[ 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.