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 1.89 2011/05/03 18:28:45 dyoung 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 1.89 2011/05/03 18:28:45 dyoung 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/udp6_private.h>
   98 #include <netinet6/ip6protosw.h>
   99 #include <netinet/in_offload.h>
  100 
  101 #include "faith.h"
  102 #if defined(NFAITH) && NFAITH > 0
  103 #include <net/if_faith.h>
  104 #endif
  105 
  106 /*
  107  * UDP protocol implementation.
  108  * Per RFC 768, August, 1980.
  109  */
  110 
  111 extern struct inpcbtable udbtable;
  112 
  113 percpu_t *udp6stat_percpu;
  114 
  115 static  void udp6_notify(struct in6pcb *, int);
  116 static  void sysctl_net_inet6_udp6_setup(struct sysctllog **);
  117 
  118 void
  119 udp6_init(void)
  120 {
  121 
  122         sysctl_net_inet6_udp6_setup(NULL);
  123 }
  124 
  125 /*
  126  * Notify a udp user of an asynchronous error;
  127  * just wake up so that he can collect error status.
  128  */
  129 static  void
  130 udp6_notify(struct in6pcb *in6p, int errno)
  131 {
  132         in6p->in6p_socket->so_error = errno;
  133         sorwakeup(in6p->in6p_socket);
  134         sowwakeup(in6p->in6p_socket);
  135 }
  136 
  137 void *
  138 udp6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
  139 {
  140         struct udphdr uh;
  141         struct ip6_hdr *ip6;
  142         const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa;
  143         struct mbuf *m;
  144         int off;
  145         void *cmdarg;
  146         struct ip6ctlparam *ip6cp = NULL;
  147         const struct sockaddr_in6 *sa6_src = NULL;
  148         void (*notify)(struct in6pcb *, int) = udp6_notify;
  149         struct udp_portonly {
  150                 u_int16_t uh_sport;
  151                 u_int16_t uh_dport;
  152         } *uhp;
  153 
  154         if (sa->sa_family != AF_INET6 ||
  155             sa->sa_len != sizeof(struct sockaddr_in6))
  156                 return NULL;
  157 
  158         if ((unsigned)cmd >= PRC_NCMDS)
  159                 return NULL;
  160         if (PRC_IS_REDIRECT(cmd))
  161                 notify = in6_rtchange, d = NULL;
  162         else if (cmd == PRC_HOSTDEAD)
  163                 d = NULL;
  164         else if (cmd == PRC_MSGSIZE) {
  165                 /* special code is present, see below */
  166                 notify = in6_rtchange;
  167         }
  168         else if (inet6ctlerrmap[cmd] == 0)
  169                 return NULL;
  170 
  171         /* if the parameter is from icmp6, decode it. */
  172         if (d != NULL) {
  173                 ip6cp = (struct ip6ctlparam *)d;
  174                 m = ip6cp->ip6c_m;
  175                 ip6 = ip6cp->ip6c_ip6;
  176                 off = ip6cp->ip6c_off;
  177                 cmdarg = ip6cp->ip6c_cmdarg;
  178                 sa6_src = ip6cp->ip6c_src;
  179         } else {
  180                 m = NULL;
  181                 ip6 = NULL;
  182                 cmdarg = NULL;
  183                 sa6_src = &sa6_any;
  184                 off = 0;
  185         }
  186 
  187         if (ip6) {
  188                 /*
  189                  * XXX: We assume that when IPV6 is non NULL,
  190                  * M and OFF are valid.
  191                  */
  192 
  193                 /* check if we can safely examine src and dst ports */
  194                 if (m->m_pkthdr.len < off + sizeof(*uhp)) {
  195                         if (cmd == PRC_MSGSIZE)
  196                                 icmp6_mtudisc_update((struct ip6ctlparam *)d, 0);
  197                         return NULL;
  198                 }
  199 
  200                 memset(&uh, 0, sizeof(uh));
  201                 m_copydata(m, off, sizeof(*uhp), (void *)&uh);
  202 
  203                 if (cmd == PRC_MSGSIZE) {
  204                         int valid = 0;
  205 
  206                         /*
  207                          * Check to see if we have a valid UDP socket
  208                          * corresponding to the address in the ICMPv6 message
  209                          * payload.
  210                          */
  211                         if (in6_pcblookup_connect(&udbtable, &sa6->sin6_addr,
  212                             uh.uh_dport, (const struct in6_addr *)&sa6_src->sin6_addr,
  213                                                   uh.uh_sport, 0, 0))
  214                                 valid++;
  215 #if 0
  216                         /*
  217                          * As the use of sendto(2) is fairly popular,
  218                          * we may want to allow non-connected pcb too.
  219                          * But it could be too weak against attacks...
  220                          * We should at least check if the local address (= s)
  221                          * is really ours.
  222                          */
  223                         else if (in6_pcblookup_bind(&udbtable, &sa6->sin6_addr,
  224                             uh.uh_dport, 0))
  225                                 valid++;
  226 #endif
  227 
  228                         /*
  229                          * Depending on the value of "valid" and routing table
  230                          * size (mtudisc_{hi,lo}wat), we will:
  231                          * - recalculate the new MTU and create the
  232                          *   corresponding routing entry, or
  233                          * - ignore the MTU change notification.
  234                          */
  235                         icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
  236 
  237                         /*
  238                          * regardless of if we called
  239                          * icmp6_mtudisc_update(), we need to call
  240                          * in6_pcbnotify(), to notify path MTU change
  241                          * to the userland (RFC3542), because some
  242                          * unconnected sockets may share the same
  243                          * destination and want to know the path MTU.
  244                          */
  245                 }
  246 
  247                 (void) in6_pcbnotify(&udbtable, sa, uh.uh_dport,
  248                     (const struct sockaddr *)sa6_src, uh.uh_sport, cmd, cmdarg,
  249                     notify);
  250         } else {
  251                 (void) in6_pcbnotify(&udbtable, sa, 0,
  252                     (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
  253         }
  254         return NULL;
  255 }
  256 
  257 extern  int udp6_sendspace;
  258 extern  int udp6_recvspace;
  259 
  260 int
  261 udp6_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *addr6,
  262     struct mbuf *control, struct lwp *l)
  263 {
  264         struct  in6pcb *in6p = sotoin6pcb(so);
  265         int     error = 0;
  266         int     s;
  267 
  268         /*
  269          * MAPPED_ADDR implementation info:
  270          *  Mapped addr support for PRU_CONTROL is not necessary.
  271          *  Because typical user of PRU_CONTROL is such as ifconfig,
  272          *  and they don't associate any addr to their socket.  Then
  273          *  socket family is only hint about the PRU_CONTROL'ed address
  274          *  family, especially when getting addrs from kernel.
  275          *  So AF_INET socket need to be used to control AF_INET addrs,
  276          *  and AF_INET6 socket for AF_INET6 addrs.
  277          */
  278         if (req == PRU_CONTROL)
  279                 return in6_control(so, (u_long)m, (void *)addr6,
  280                                    (struct ifnet *)control, l);
  281 
  282         if (req == PRU_PURGEIF) {
  283                 mutex_enter(softnet_lock);
  284                 in6_pcbpurgeif0(&udbtable, (struct ifnet *)control);
  285                 in6_purgeif((struct ifnet *)control);
  286                 in6_pcbpurgeif(&udbtable, (struct ifnet *)control);
  287                 mutex_exit(softnet_lock);
  288                 return 0;
  289         }
  290 
  291         if (req == PRU_ATTACH)
  292                 sosetlock(so);
  293         else if (in6p == NULL) {
  294                 error = EINVAL;
  295                 goto release;
  296         }
  297 
  298         switch (req) {
  299         case PRU_ATTACH:
  300                 /*
  301                  * MAPPED_ADDR implementation spec:
  302                  *  Always attach for IPv6,
  303                  *  and only when necessary for IPv4.
  304                  */
  305                 if (in6p != NULL) {
  306                         error = EINVAL;
  307                         break;
  308                 }
  309                 s = splsoftnet();
  310                 error = in6_pcballoc(so, &udbtable);
  311                 splx(s);
  312                 if (error)
  313                         break;
  314                 error = soreserve(so, udp6_sendspace, udp6_recvspace);
  315                 if (error)
  316                         break;
  317                 in6p = sotoin6pcb(so);
  318                 in6p->in6p_cksum = -1;  /* just to be sure */
  319                 break;
  320 
  321         case PRU_DETACH:
  322                 in6_pcbdetach(in6p);
  323                 break;
  324 
  325         case PRU_BIND:
  326                 s = splsoftnet();
  327                 error = in6_pcbbind(in6p, addr6, l);
  328                 splx(s);
  329                 break;
  330 
  331         case PRU_CONNECT:
  332                 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  333                         error = EISCONN;
  334                         break;
  335                 }
  336                 s = splsoftnet();
  337                 error = in6_pcbconnect(in6p, addr6, l);
  338                 splx(s);
  339                 if (error == 0)
  340                         soisconnected(so);
  341                 break;
  342 
  343         case PRU_DISCONNECT:
  344                 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
  345                         error = ENOTCONN;
  346                         break;
  347                 }
  348                 s = splsoftnet();
  349                 in6_pcbdisconnect(in6p);
  350                 memset((void *)&in6p->in6p_laddr, 0, sizeof(in6p->in6p_laddr));
  351                 splx(s);
  352                 so->so_state &= ~SS_ISCONNECTED;                /* XXX */
  353                 in6_pcbstate(in6p, IN6P_BOUND);         /* XXX */
  354                 break;
  355 
  356         case PRU_SHUTDOWN:
  357                 socantsendmore(so);
  358                 break;
  359 
  360         case PRU_SEND:
  361                 s = splsoftnet();
  362                 error = udp6_output(in6p, m, addr6, control, l);
  363                 splx(s);
  364                 return error;
  365 
  366         case PRU_ABORT:
  367                 soisdisconnected(so);
  368                 in6_pcbdetach(in6p);
  369                 break;
  370 
  371         case PRU_SOCKADDR:
  372                 in6_setsockaddr(in6p, addr6);
  373                 break;
  374 
  375         case PRU_PEERADDR:
  376                 in6_setpeeraddr(in6p, addr6);
  377                 break;
  378 
  379         case PRU_SENSE:
  380                 /*
  381                  * stat: don't bother with a blocksize
  382                  */
  383                 return 0;
  384 
  385         case PRU_LISTEN:
  386         case PRU_CONNECT2:
  387         case PRU_ACCEPT:
  388         case PRU_SENDOOB:
  389         case PRU_FASTTIMO:
  390         case PRU_SLOWTIMO:
  391         case PRU_PROTORCV:
  392         case PRU_PROTOSEND:
  393                 error = EOPNOTSUPP;
  394                 break;
  395 
  396         case PRU_RCVD:
  397         case PRU_RCVOOB:
  398                 return EOPNOTSUPP;      /* do not free mbuf's */
  399 
  400         default:
  401                 panic("udp6_usrreq");
  402         }
  403 
  404 release:
  405         if (control != NULL)
  406                 m_freem(control);
  407         if (m != NULL)
  408                 m_freem(m);
  409         return error;
  410 }
  411 
  412 static int
  413 sysctl_net_inet6_udp6_stats(SYSCTLFN_ARGS)
  414 {
  415 
  416         return (NETSTAT_SYSCTL(udp6stat_percpu, UDP6_NSTATS));
  417 }
  418 
  419 static void
  420 sysctl_net_inet6_udp6_setup(struct sysctllog **clog)
  421 {
  422         sysctl_createv(clog, 0, NULL, NULL,
  423                        CTLFLAG_PERMANENT,
  424                        CTLTYPE_NODE, "net", NULL,
  425                        NULL, 0, NULL, 0,
  426                        CTL_NET, CTL_EOL);
  427         sysctl_createv(clog, 0, NULL, NULL,
  428                        CTLFLAG_PERMANENT,
  429                        CTLTYPE_NODE, "inet6", NULL,
  430                        NULL, 0, NULL, 0,
  431                        CTL_NET, PF_INET6, CTL_EOL);
  432         sysctl_createv(clog, 0, NULL, NULL,
  433                        CTLFLAG_PERMANENT,
  434                        CTLTYPE_NODE, "udp6",
  435                        SYSCTL_DESCR("UDPv6 related settings"),
  436                        NULL, 0, NULL, 0,
  437                        CTL_NET, PF_INET6, IPPROTO_UDP, CTL_EOL);
  438 
  439         sysctl_createv(clog, 0, NULL, NULL,
  440                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  441                        CTLTYPE_INT, "sendspace",
  442                        SYSCTL_DESCR("Default UDP send buffer size"),
  443                        NULL, 0, &udp6_sendspace, 0,
  444                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_SENDSPACE,
  445                        CTL_EOL);
  446         sysctl_createv(clog, 0, NULL, NULL,
  447                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  448                        CTLTYPE_INT, "recvspace",
  449                        SYSCTL_DESCR("Default UDP receive buffer size"),
  450                        NULL, 0, &udp6_recvspace, 0,
  451                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_RECVSPACE,
  452                        CTL_EOL);
  453         sysctl_createv(clog, 0, NULL, NULL,
  454                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
  455                        CTLTYPE_INT, "do_loopback_cksum",
  456                        SYSCTL_DESCR("Perform UDP checksum on loopback"),
  457                        NULL, 0, &udp_do_loopback_cksum, 0,
  458                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_LOOPBACKCKSUM,
  459                        CTL_EOL);
  460         sysctl_createv(clog, 0, NULL, NULL,
  461                        CTLFLAG_PERMANENT,
  462                        CTLTYPE_STRUCT, "pcblist",
  463                        SYSCTL_DESCR("UDP protocol control block list"),
  464                        sysctl_inpcblist, 0, &udbtable, 0,
  465                        CTL_NET, PF_INET6, IPPROTO_UDP, CTL_CREATE,
  466                        CTL_EOL);
  467         sysctl_createv(clog, 0, NULL, NULL,
  468                        CTLFLAG_PERMANENT,
  469                        CTLTYPE_STRUCT, "stats",
  470                        SYSCTL_DESCR("UDPv6 statistics"),
  471                        sysctl_net_inet6_udp6_stats, 0, NULL, 0,
  472                        CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_STATS,
  473                        CTL_EOL);
  474 }
  475 
  476 void
  477 udp6_statinc(u_int stat)
  478 {
  479 
  480         KASSERT(stat < UDP6_NSTATS);
  481         UDP6_STATINC(stat);
  482 }

Cache object: b074e5c2ba36b888d24e2c3841939409


[ 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.