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/netns/ns.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*
    2  * Copyright (c) 1984, 1985, 1986, 1987, 1993
    3  *      The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)ns.c        8.2 (Berkeley) 11/15/93
   34  * $FreeBSD: releng/5.0/sys/netns/ns.c 97658 2002-05-31 11:52:35Z tanimura $
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/ioctl.h>
   41 #include <sys/protosw.h>
   42 #include <sys/errno.h>
   43 #include <sys/socket.h>
   44 #include <sys/socketvar.h>
   45 
   46 #include <net/if.h>
   47 #include <net/route.h>
   48 
   49 #include <netns/ns.h>
   50 #include <netns/ns_if.h>
   51 
   52 #ifdef NS
   53 
   54 struct ns_ifaddr *ns_ifaddr;
   55 int ns_interfaces;
   56 extern struct sockaddr_ns ns_netmask, ns_hostmask;
   57 
   58 /*
   59  * Generic internet control operations (ioctl's).
   60  */
   61 /* ARGSUSED */
   62 ns_control(so, cmd, data, ifp)
   63         struct socket *so;
   64         int cmd;
   65         caddr_t data;
   66         register struct ifnet *ifp;
   67 {
   68         register struct ifreq *ifr = (struct ifreq *)data;
   69         register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
   70         register struct ns_ifaddr *ia;
   71         struct ifaddr *ifa;
   72         struct ns_ifaddr *oia;
   73         int error, dstIsNew, hostIsNew;
   74 
   75         /*
   76          * Find address for this interface, if it exists.
   77          */
   78         if (ifp == 0)
   79                 return (EADDRNOTAVAIL);
   80         for (ia = ns_ifaddr; ia; ia = ia->ia_next)
   81                 if (ia->ia_ifp == ifp)
   82                         break;
   83 
   84         switch (cmd) {
   85 
   86         case SIOCGIFADDR:
   87                 if (ia == (struct ns_ifaddr *)0)
   88                         return (EADDRNOTAVAIL);
   89                 *(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
   90                 return (0);
   91 
   92 
   93         case SIOCGIFBRDADDR:
   94                 if (ia == (struct ns_ifaddr *)0)
   95                         return (EADDRNOTAVAIL);
   96                 if ((ifp->if_flags & IFF_BROADCAST) == 0)
   97                         return (EINVAL);
   98                 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
   99                 return (0);
  100 
  101         case SIOCGIFDSTADDR:
  102                 if (ia == (struct ns_ifaddr *)0)
  103                         return (EADDRNOTAVAIL);
  104                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
  105                         return (EINVAL);
  106                 *(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
  107                 return (0);
  108         }
  109 
  110         if ((so->so_state & SS_PRIV) == 0)
  111                 return (EPERM);
  112 
  113         switch (cmd) {
  114         case SIOCAIFADDR:
  115         case SIOCDIFADDR:
  116                 if (ifra->ifra_addr.sns_family == AF_NS)
  117                     for (oia = ia; ia; ia = ia->ia_next) {
  118                         if (ia->ia_ifp == ifp  &&
  119                             ns_neteq(ia->ia_addr.sns_addr,
  120                                   ifra->ifra_addr.sns_addr))
  121                             break;
  122                     }
  123                 if (cmd == SIOCDIFADDR && ia == 0)
  124                         return (EADDRNOTAVAIL);
  125                 /* FALLTHROUGH */
  126 
  127         case SIOCSIFADDR:
  128         case SIOCSIFDSTADDR:
  129                 if (ia == (struct ns_ifaddr *)0) {
  130                         oia = (struct ns_ifaddr *)
  131                                 malloc(sizeof *ia, M_IFADDR, M_WAITOK);
  132                         if (oia == (struct ns_ifaddr *)NULL)
  133                                 return (ENOBUFS);
  134                         bzero((caddr_t)oia, sizeof(*oia));
  135                         if (ia = ns_ifaddr) {
  136                                 for ( ; ia->ia_next; ia = ia->ia_next)
  137                                         ;
  138                                 ia->ia_next = oia;
  139                         } else
  140                                 ns_ifaddr = oia;
  141                         ia = oia;
  142                         if (ifa = ifp->if_addrlist) {
  143                                 for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
  144                                         ;
  145                                 ifa->ifa_next = (struct ifaddr *) ia;
  146                         } else
  147                                 ifp->if_addrlist = (struct ifaddr *) ia;
  148                         ia->ia_ifp = ifp;
  149                         ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
  150 
  151                         ia->ia_ifa.ifa_netmask =
  152                                 (struct sockaddr *)&ns_netmask;
  153 
  154                         ia->ia_ifa.ifa_dstaddr =
  155                                 (struct sockaddr *)&ia->ia_dstaddr;
  156                         if (ifp->if_flags & IFF_BROADCAST) {
  157                                 ia->ia_broadaddr.sns_family = AF_NS;
  158                                 ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
  159                                 ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
  160                         }
  161                         ns_interfaces++;
  162                 }
  163         }
  164 
  165         switch (cmd) {
  166                 int error;
  167 
  168         case SIOCSIFDSTADDR:
  169                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
  170                         return (EINVAL);
  171                 if (ia->ia_flags & IFA_ROUTE) {
  172                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
  173                         ia->ia_flags &= ~IFA_ROUTE;
  174                 }
  175                 if (ifp->if_ioctl) {
  176                         error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
  177                         if (error)
  178                                 return (error);
  179                 }
  180                 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
  181                 return (0);
  182 
  183         case SIOCSIFADDR:
  184                 return (ns_ifinit(ifp, ia,
  185                                 (struct sockaddr_ns *)&ifr->ifr_addr, 1));
  186 
  187         case SIOCDIFADDR:
  188                 ns_ifscrub(ifp, ia);
  189                 if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
  190                         ifp->if_addrlist = ifa->ifa_next;
  191                 else {
  192                         while (ifa->ifa_next &&
  193                                (ifa->ifa_next != (struct ifaddr *)ia))
  194                                     ifa = ifa->ifa_next;
  195                         if (ifa->ifa_next)
  196                             ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
  197                         else
  198                                 printf("Couldn't unlink nsifaddr from ifp\n");
  199                 }
  200                 oia = ia;
  201                 if (oia == (ia = ns_ifaddr)) {
  202                         ns_ifaddr = ia->ia_next;
  203                 } else {
  204                         while (ia->ia_next && (ia->ia_next != oia)) {
  205                                 ia = ia->ia_next;
  206                         }
  207                         if (ia->ia_next)
  208                             ia->ia_next = oia->ia_next;
  209                         else
  210                                 printf("Didn't unlink nsifadr from list\n");
  211                 }
  212                 IFAFREE((&oia->ia_ifa));
  213                 if (0 == --ns_interfaces) {
  214                         /*
  215                          * We reset to virginity and start all over again
  216                          */
  217                         ns_thishost = ns_zerohost;
  218                 }
  219                 return (0);
  220 
  221         case SIOCAIFADDR:
  222                 dstIsNew = 0; hostIsNew = 1;
  223                 if (ia->ia_addr.sns_family == AF_NS) {
  224                         if (ifra->ifra_addr.sns_len == 0) {
  225                                 ifra->ifra_addr = ia->ia_addr;
  226                                 hostIsNew = 0;
  227                         } else if (ns_neteq(ifra->ifra_addr.sns_addr,
  228                                          ia->ia_addr.sns_addr))
  229                                 hostIsNew = 0;
  230                 }
  231                 if ((ifp->if_flags & IFF_POINTOPOINT) &&
  232                     (ifra->ifra_dstaddr.sns_family == AF_NS)) {
  233                         if (hostIsNew == 0)
  234                                 ns_ifscrub(ifp, ia);
  235                         ia->ia_dstaddr = ifra->ifra_dstaddr;
  236                         dstIsNew  = 1;
  237                 }
  238                 if (ifra->ifra_addr.sns_family == AF_NS &&
  239                                             (hostIsNew || dstIsNew))
  240                         error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
  241                 return (error);
  242 
  243         default:
  244                 if (ifp->if_ioctl == 0)
  245                         return (EOPNOTSUPP);
  246                 return ((*ifp->if_ioctl)(ifp, cmd, data));
  247         }
  248 }
  249 
  250 /*
  251 * Delete any previous route for an old address.
  252 */
  253 ns_ifscrub(ifp, ia)
  254         register struct ifnet *ifp;
  255         register struct ns_ifaddr *ia;
  256 {
  257         if (ia->ia_flags & IFA_ROUTE) {
  258                 if (ifp->if_flags & IFF_POINTOPOINT) {
  259                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
  260                 } else
  261                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
  262                 ia->ia_flags &= ~IFA_ROUTE;
  263         }
  264 }
  265 /*
  266  * Initialize an interface's internet address
  267  * and routing table entry.
  268  */
  269 ns_ifinit(ifp, ia, sns, scrub)
  270         register struct ifnet *ifp;
  271         register struct ns_ifaddr *ia;
  272         register struct sockaddr_ns *sns;
  273 {
  274         struct sockaddr_ns oldaddr;
  275         register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
  276         int s = splimp(), error;
  277 
  278         /*
  279          * Set up new addresses.
  280          */
  281         oldaddr = ia->ia_addr;
  282         ia->ia_addr = *sns;
  283         /*
  284          * The convention we shall adopt for naming is that
  285          * a supplied address of zero means that "we don't care".
  286          * if there is a single interface, use the address of that
  287          * interface as our 6 byte host address.
  288          * if there are multiple interfaces, use any address already
  289          * used.
  290          *
  291          * Give the interface a chance to initialize
  292          * if this is its first address,
  293          * and to validate the address if necessary.
  294          */
  295         if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
  296                 if (ifp->if_ioctl &&
  297                      (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
  298                         ia->ia_addr = oldaddr;
  299                         splx(s);
  300                         return (error);
  301                 }
  302                 ns_thishost = *h;
  303         } else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
  304             || ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
  305                 *h = ns_thishost;
  306                 if (ifp->if_ioctl &&
  307                      (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
  308                         ia->ia_addr = oldaddr;
  309                         splx(s);
  310                         return (error);
  311                 }
  312                 if (!ns_hosteqnh(ns_thishost,*h)) {
  313                         ia->ia_addr = oldaddr;
  314                         splx(s);
  315                         return (EINVAL);
  316                 }
  317         } else {
  318                 ia->ia_addr = oldaddr;
  319                 splx(s);
  320                 return (EINVAL);
  321         }
  322         ia->ia_ifa.ifa_metric = ifp->if_metric;
  323         /*
  324          * Add route for the network.
  325          */
  326         if (scrub) {
  327                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
  328                 ns_ifscrub(ifp, ia);
  329                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
  330         }
  331         if (ifp->if_flags & IFF_POINTOPOINT)
  332                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
  333         else {
  334                 ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
  335                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
  336         }
  337         ia->ia_flags |= IFA_ROUTE;
  338         return (0);
  339 }
  340 
  341 /*
  342  * Return address info for specified internet network.
  343  */
  344 struct ns_ifaddr *
  345 ns_iaonnetof(dst)
  346         register struct ns_addr *dst;
  347 {
  348         register struct ns_ifaddr *ia;
  349         register struct ns_addr *compare;
  350         register struct ifnet *ifp;
  351         struct ns_ifaddr *ia_maybe = 0;
  352         union ns_net net = dst->x_net;
  353 
  354         for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
  355                 if (ifp = ia->ia_ifp) {
  356                         if (ifp->if_flags & IFF_POINTOPOINT) {
  357                                 compare = &satons_addr(ia->ia_dstaddr);
  358                                 if (ns_hosteq(*dst, *compare))
  359                                         return (ia);
  360                                 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
  361                                         ia_maybe = ia;
  362                         } else {
  363                                 if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
  364                                         return (ia);
  365                         }
  366                 }
  367         }
  368         return (ia_maybe);
  369 }
  370 #endif

Cache object: 570f5d446c803bac0bfefa43c7941d3f


[ 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.