sys/netproto/ipx/ipx.c

   1 /*
   2  * Copyright (c) 1995, Mike Mitchell
   3  * Copyright (c) 1984, 1985, 1986, 1987, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the University of
  17  *      California, Berkeley and its contributors.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)ipx.c
  35  *
  36  * $FreeBSD: src/sys/netipx/ipx.c,v 1.17.2.3 2003/04/04 09:35:43 tjr Exp $
  37  * $DragonFly: src/sys/netproto/ipx/ipx.c,v 1.15 2008/03/07 11:34:21 sephe Exp $
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/malloc.h>
  43 #include <sys/sockio.h>
  44 #include <sys/proc.h>
  45 #include <sys/socket.h>
  46 #include <sys/thread2.h>
  47
  48 #include <net/if.h>
  49 #include <net/route.h>
  50
  51 #include "ipx.h"
  52 #include "ipx_if.h"
  53 #include "ipx_var.h"
  54
  55 struct ipx_ifaddr *ipx_ifaddr;
  56
  57 static  void ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia);
  58 static  int ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
  59                        struct sockaddr_ipx *sipx, int scrub);
  60
  61 /*
  62  * Generic internet control operations (ioctl's).
  63  */
  64 int
  65 ipx_control(struct socket *so, u_long cmd, caddr_t data,
  66         struct ifnet *ifp, struct thread *td)
  67 {
  68         struct ifreq *ifr = (struct ifreq *)data;
  69         struct ipx_aliasreq *ifra = (struct ipx_aliasreq *)data;
  70         struct ipx_ifaddr *ia;
  71         struct ifaddr *ifa;
  72         struct ipx_ifaddr *oia;
  73         int dstIsNew, hostIsNew;
  74         int error = 0;
  75
  76         /*
  77          * Find address for this interface, if it exists.
  78          */
  79         if (ifp == NULL)
  80                 return (EADDRNOTAVAIL);
  81         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
  82                 if (ia->ia_ifp == ifp)
  83                         break;
  84
  85         switch (cmd) {
  86
  87         case SIOCGIFADDR:
  88                 if (ia == NULL)
  89                         return (EADDRNOTAVAIL);
  90                 *(struct sockaddr_ipx *)&ifr->ifr_addr = ia->ia_addr;
  91                 return (0);
  92
  93         case SIOCGIFBRDADDR:
  94                 if (ia == NULL)
  95                         return (EADDRNOTAVAIL);
  96                 if ((ifp->if_flags & IFF_BROADCAST) == 0)
  97                         return (EINVAL);
  98                 *(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
  99                 return (0);
 100
 101         case SIOCGIFDSTADDR:
 102                 if (ia == NULL)
 103                         return (EADDRNOTAVAIL);
 104                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
 105                         return (EINVAL);
 106                 *(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
 107                 return (0);
 108         }
 109
 110         if ((error = suser(td)) != 0)
 111                 return (error);
 112
 113         switch (cmd) {
 114         case SIOCAIFADDR:
 115         case SIOCDIFADDR:
 116                 if (ifra->ifra_addr.sipx_family == AF_IPX)
 117                     for (oia = ia; ia != NULL; ia = ia->ia_next) {
 118                         if (ia->ia_ifp == ifp  &&
 119                             ipx_neteq(ia->ia_addr.sipx_addr,
 120                                   ifra->ifra_addr.sipx_addr))
 121                             break;
 122                     }
 123                 if (cmd == SIOCDIFADDR && ia == NULL)
 124                         return (EADDRNOTAVAIL);
 125                 /* FALLTHROUGH */
 126
 127         case SIOCSIFADDR:
 128         case SIOCSIFDSTADDR:
 129                 if (ia == NULL) {
 130                         oia = ifa_create(sizeof(*ia), M_WAITOK);
 131                         if ((ia = ipx_ifaddr) != NULL) {
 132                                 for ( ; ia->ia_next != NULL; ia = ia->ia_next)
 133                                         ;
 134                                 ia->ia_next = oia;
 135                         } else
 136                                 ipx_ifaddr = oia;
 137                         ia = oia;
 138                         ifa = (struct ifaddr *)ia;
 139                         ifa_iflink(ifa, ifp, 1);
 140                         ia->ia_ifp = ifp;
 141                         ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
 142
 143                         ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
 144
 145                         ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
 146                         if (ifp->if_flags & IFF_BROADCAST) {
 147                                 ia->ia_broadaddr.sipx_family = AF_IPX;
 148                                 ia->ia_broadaddr.sipx_len = sizeof(ia->ia_addr);
 149                                 ia->ia_broadaddr.sipx_addr.x_host = ipx_broadhost;
 150                         }
 151                 }
 152         }
 153
 154         switch (cmd) {
 155
 156         case SIOCSIFDSTADDR:
 157                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
 158                         return (EINVAL);
 159                 if (ia->ia_flags & IFA_ROUTE) {
 160                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 161                         ia->ia_flags &= ~IFA_ROUTE;
 162                 }
 163                 if (ifp->if_ioctl) {
 164                         lwkt_serialize_enter(ifp->if_serializer);
 165                         error = ifp->if_ioctl(ifp, SIOCSIFDSTADDR,
 166                                               (void *)ia, td->td_proc->p_ucred);
 167                         lwkt_serialize_exit(ifp->if_serializer);
 168                         if (error)
 169                                 return (error);
 170                 }
 171                 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
 172                 return (0);
 173
 174         case SIOCSIFADDR:
 175                 return (ipx_ifinit(ifp, ia,
 176                                 (struct sockaddr_ipx *)&ifr->ifr_addr, 1));
 177
 178         case SIOCDIFADDR:
 179                 ipx_ifscrub(ifp, ia);
 180                 ifa = (struct ifaddr *)ia;
 181                 ifa_ifunlink(ifa, ifp);
 182                 oia = ia;
 183                 if (oia == (ia = ipx_ifaddr)) {
 184                         ipx_ifaddr = ia->ia_next;
 185                 } else {
 186                         while (ia->ia_next && (ia->ia_next != oia)) {
 187                                 ia = ia->ia_next;
 188                         }
 189                         if (ia->ia_next)
 190                             ia->ia_next = oia->ia_next;
 191                         else
 192                                 kprintf("Didn't unlink ipxifadr from list\n");
 193                 }
 194                 ifa_destroy(&oia->ia_ifa);
 195                 return (0);
 196
 197         case SIOCAIFADDR:
 198                 dstIsNew = 0;
 199                 hostIsNew = 1;
 200                 if (ia->ia_addr.sipx_family == AF_IPX) {
 201                         if (ifra->ifra_addr.sipx_len == 0) {
 202                                 ifra->ifra_addr = ia->ia_addr;
 203                                 hostIsNew = 0;
 204                         } else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
 205                                          ia->ia_addr.sipx_addr))
 206                                 hostIsNew = 0;
 207                 }
 208                 if ((ifp->if_flags & IFF_POINTOPOINT) &&
 209                     (ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
 210                         if (hostIsNew == 0)
 211                                 ipx_ifscrub(ifp, ia);
 212                         ia->ia_dstaddr = ifra->ifra_dstaddr;
 213                         dstIsNew  = 1;
 214                 }
 215                 if (ifra->ifra_addr.sipx_family == AF_IPX &&
 216                                             (hostIsNew || dstIsNew))
 217                         error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
 218                 return (error);
 219
 220         default:
 221                 if (ifp->if_ioctl == NULL)
 222                         return (EOPNOTSUPP);
 223                 lwkt_serialize_enter(ifp->if_serializer);
 224                 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
 225                 lwkt_serialize_exit(ifp->if_serializer);
 226                 return (error);
 227         }
 228 }
 229
 230 /*
 231 * Delete any previous route for an old address.
 232 */
 233 static void
 234 ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia)
 235 {
 236         if (ia->ia_flags & IFA_ROUTE) {
 237                 if (ifp->if_flags & IFF_POINTOPOINT) {
 238                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 239                 } else
 240                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
 241                 ia->ia_flags &= ~IFA_ROUTE;
 242         }
 243 }
 244 /*
 245  * Initialize an interface's internet address
 246  * and routing table entry.
 247  */
 248 static int
 249 ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
 250            struct sockaddr_ipx *sipx, int scrub)
 251 {
 252         struct sockaddr_ipx oldaddr;
 253         int error;
 254
 255         /*
 256          * Set up new addresses.
 257          */
 258         oldaddr = ia->ia_addr;
 259         ia->ia_addr = *sipx;
 260
 261         /*
 262          * The convention we shall adopt for naming is that
 263          * a supplied address of zero means that "we don't care".
 264          * Use the MAC address of the interface. If it is an
 265          * interface without a MAC address, like a serial line, the
 266          * address must be supplied.
 267          *
 268          * Give the interface a chance to initialize
 269          * if this is its first address,
 270          * and to validate the address if necessary.
 271          */
 272         lwkt_serialize_enter(ifp->if_serializer);
 273         if (ifp->if_ioctl != NULL &&
 274             (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (void *)ia,
 275                                       (struct ucred *)NULL))) {
 276                 ia->ia_addr = oldaddr;
 277                 lwkt_serialize_exit(ifp->if_serializer);
 278                 return (error);
 279         }
 280         lwkt_serialize_exit(ifp->if_serializer);
 281         ia->ia_ifa.ifa_metric = ifp->if_metric;
 282         /*
 283          * Add route for the network.
 284          */
 285         if (scrub) {
 286                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
 287                 ipx_ifscrub(ifp, ia);
 288                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
 289         }
 290         if (ifp->if_flags & IFF_POINTOPOINT)
 291                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
 292         else {
 293                 ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
 294                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
 295         }
 296         ia->ia_flags |= IFA_ROUTE;
 297         return (0);
 298 }
 299
 300 /*
 301  * Return address info for specified internet network.
 302  */
 303 struct ipx_ifaddr *
 304 ipx_iaonnetof(struct ipx_addr *dst)
 305 {
 306         struct ipx_ifaddr *ia;
 307         struct ipx_addr *compare;
 308         struct ifnet *ifp;
 309         struct ipx_ifaddr *ia_maybe = NULL;
 310         union ipx_net net = dst->x_net;
 311
 312         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
 313                 if ((ifp = ia->ia_ifp) != NULL) {
 314                         if (ifp->if_flags & IFF_POINTOPOINT) {
 315                                 compare = &satoipx_addr(ia->ia_dstaddr);
 316                                 if (ipx_hosteq(*dst, *compare))
 317                                         return (ia);
 318                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 319                                         ia_maybe = ia;
 320                         } else {
 321                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 322                                         return (ia);
 323                         }
 324                 }
 325         }
 326         return (ia_maybe);
 327 }
 328
 329
 330 void
 331 ipx_printhost(struct ipx_addr *addr)
 332 {
 333         u_short port;
 334         struct ipx_addr work = *addr;
 335         char *p; u_char *q;
 336         char *net = "", *host = "";
 337         char cport[10], chost[15], cnet[15];
 338
 339         port = ntohs(work.x_port);
 340
 341         if (ipx_nullnet(work) && ipx_nullhost(work)) {
 342
 343                 if (port)
 344                         kprintf("*.%x", port);
 345                 else
 346                         kprintf("*.*");
 347
 348                 return;
 349         }
 350
 351         if (ipx_wildnet(work))
 352                 net = "any";
 353         else if (ipx_nullnet(work))
 354                 net = "*";
 355         else {
 356                 q = work.x_net.c_net;
 357                 ksnprintf(cnet, sizeof(cnet), "%x%x%x%x",
 358                         q[0], q[1], q[2], q[3]);
 359                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
 360                         continue;
 361                 net = p;
 362         }
 363
 364         if (ipx_wildhost(work))
 365                 host = "any";
 366         else if (ipx_nullhost(work))
 367                 host = "*";
 368         else {
 369                 q = work.x_host.c_host;
 370                 ksnprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
 371                         q[0], q[1], q[2], q[3], q[4], q[5]);
 372                 for (p = chost; *p == '0' && p < chost + 12; p++)
 373                         continue;
 374                 host = p;
 375         }
 376
 377         if (port) {
 378                 if (strcmp(host, "*") == 0) {
 379                         host = "";
 380                         ksnprintf(cport, sizeof(cport), "%x", port);
 381                 } else
 382                         ksnprintf(cport, sizeof(cport), ".%x", port);
 383         } else
 384                 *cport = 0;
 385
 386         kprintf("%s.%s%s", net, host, cport);
 387 }