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 1.14 2008/01/06 16:55:52 swildner 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 = (struct ipx_ifaddr *)
 131                                 kmalloc(sizeof(*ia), M_IFADDR,
 132                                 M_WAITOK | M_ZERO);
 133                         if ((ia = ipx_ifaddr) != NULL) {
 134                                 for ( ; ia->ia_next != NULL; ia = ia->ia_next)
 135                                         ;
 136                                 ia->ia_next = oia;
 137                         } else
 138                                 ipx_ifaddr = oia;
 139                         ia = oia;
 140                         ifa = (struct ifaddr *)ia;
 141                         TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
 142                         ia->ia_ifp = ifp;
 143                         ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
 144
 145                         ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
 146
 147                         ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
 148                         if (ifp->if_flags & IFF_BROADCAST) {
 149                                 ia->ia_broadaddr.sipx_family = AF_IPX;
 150                                 ia->ia_broadaddr.sipx_len = sizeof(ia->ia_addr);
 151                                 ia->ia_broadaddr.sipx_addr.x_host = ipx_broadhost;
 152                         }
 153                 }
 154         }
 155
 156         switch (cmd) {
 157
 158         case SIOCSIFDSTADDR:
 159                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
 160                         return (EINVAL);
 161                 if (ia->ia_flags & IFA_ROUTE) {
 162                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 163                         ia->ia_flags &= ~IFA_ROUTE;
 164                 }
 165                 if (ifp->if_ioctl) {
 166                         lwkt_serialize_enter(ifp->if_serializer);
 167                         error = ifp->if_ioctl(ifp, SIOCSIFDSTADDR,
 168                                               (void *)ia, td->td_proc->p_ucred);
 169                         lwkt_serialize_exit(ifp->if_serializer);
 170                         if (error)
 171                                 return (error);
 172                 }
 173                 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
 174                 return (0);
 175
 176         case SIOCSIFADDR:
 177                 return (ipx_ifinit(ifp, ia,
 178                                 (struct sockaddr_ipx *)&ifr->ifr_addr, 1));
 179
 180         case SIOCDIFADDR:
 181                 ipx_ifscrub(ifp, ia);
 182                 ifa = (struct ifaddr *)ia;
 183                 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
 184                 oia = ia;
 185                 if (oia == (ia = ipx_ifaddr)) {
 186                         ipx_ifaddr = ia->ia_next;
 187                 } else {
 188                         while (ia->ia_next && (ia->ia_next != oia)) {
 189                                 ia = ia->ia_next;
 190                         }
 191                         if (ia->ia_next)
 192                             ia->ia_next = oia->ia_next;
 193                         else
 194                                 kprintf("Didn't unlink ipxifadr from list\n");
 195                 }
 196                 IFAFREE((&oia->ia_ifa));
 197                 return (0);
 198
 199         case SIOCAIFADDR:
 200                 dstIsNew = 0;
 201                 hostIsNew = 1;
 202                 if (ia->ia_addr.sipx_family == AF_IPX) {
 203                         if (ifra->ifra_addr.sipx_len == 0) {
 204                                 ifra->ifra_addr = ia->ia_addr;
 205                                 hostIsNew = 0;
 206                         } else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
 207                                          ia->ia_addr.sipx_addr))
 208                                 hostIsNew = 0;
 209                 }
 210                 if ((ifp->if_flags & IFF_POINTOPOINT) &&
 211                     (ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
 212                         if (hostIsNew == 0)
 213                                 ipx_ifscrub(ifp, ia);
 214                         ia->ia_dstaddr = ifra->ifra_dstaddr;
 215                         dstIsNew  = 1;
 216                 }
 217                 if (ifra->ifra_addr.sipx_family == AF_IPX &&
 218                                             (hostIsNew || dstIsNew))
 219                         error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
 220                 return (error);
 221
 222         default:
 223                 if (ifp->if_ioctl == NULL)
 224                         return (EOPNOTSUPP);
 225                 lwkt_serialize_enter(ifp->if_serializer);
 226                 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
 227                 lwkt_serialize_exit(ifp->if_serializer);
 228                 return (error);
 229         }
 230 }
 231
 232 /*
 233 * Delete any previous route for an old address.
 234 */
 235 static void
 236 ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia)
 237 {
 238         if (ia->ia_flags & IFA_ROUTE) {
 239                 if (ifp->if_flags & IFF_POINTOPOINT) {
 240                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 241                 } else
 242                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
 243                 ia->ia_flags &= ~IFA_ROUTE;
 244         }
 245 }
 246 /*
 247  * Initialize an interface's internet address
 248  * and routing table entry.
 249  */
 250 static int
 251 ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
 252            struct sockaddr_ipx *sipx, int scrub)
 253 {
 254         struct sockaddr_ipx oldaddr;
 255         int error;
 256
 257         /*
 258          * Set up new addresses.
 259          */
 260         oldaddr = ia->ia_addr;
 261         ia->ia_addr = *sipx;
 262
 263         /*
 264          * The convention we shall adopt for naming is that
 265          * a supplied address of zero means that "we don't care".
 266          * Use the MAC address of the interface. If it is an
 267          * interface without a MAC address, like a serial line, the
 268          * address must be supplied.
 269          *
 270          * Give the interface a chance to initialize
 271          * if this is its first address,
 272          * and to validate the address if necessary.
 273          */
 274         lwkt_serialize_enter(ifp->if_serializer);
 275         if (ifp->if_ioctl != NULL &&
 276             (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (void *)ia,
 277                                       (struct ucred *)NULL))) {
 278                 ia->ia_addr = oldaddr;
 279                 lwkt_serialize_exit(ifp->if_serializer);
 280                 return (error);
 281         }
 282         lwkt_serialize_exit(ifp->if_serializer);
 283         ia->ia_ifa.ifa_metric = ifp->if_metric;
 284         /*
 285          * Add route for the network.
 286          */
 287         if (scrub) {
 288                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
 289                 ipx_ifscrub(ifp, ia);
 290                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
 291         }
 292         if (ifp->if_flags & IFF_POINTOPOINT)
 293                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
 294         else {
 295                 ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
 296                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
 297         }
 298         ia->ia_flags |= IFA_ROUTE;
 299         return (0);
 300 }
 301
 302 /*
 303  * Return address info for specified internet network.
 304  */
 305 struct ipx_ifaddr *
 306 ipx_iaonnetof(struct ipx_addr *dst)
 307 {
 308         struct ipx_ifaddr *ia;
 309         struct ipx_addr *compare;
 310         struct ifnet *ifp;
 311         struct ipx_ifaddr *ia_maybe = NULL;
 312         union ipx_net net = dst->x_net;
 313
 314         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
 315                 if ((ifp = ia->ia_ifp) != NULL) {
 316                         if (ifp->if_flags & IFF_POINTOPOINT) {
 317                                 compare = &satoipx_addr(ia->ia_dstaddr);
 318                                 if (ipx_hosteq(*dst, *compare))
 319                                         return (ia);
 320                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 321                                         ia_maybe = ia;
 322                         } else {
 323                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 324                                         return (ia);
 325                         }
 326                 }
 327         }
 328         return (ia_maybe);
 329 }
 330
 331
 332 void
 333 ipx_printhost(struct ipx_addr *addr)
 334 {
 335         u_short port;
 336         struct ipx_addr work = *addr;
 337         char *p; u_char *q;
 338         char *net = "", *host = "";
 339         char cport[10], chost[15], cnet[15];
 340
 341         port = ntohs(work.x_port);
 342
 343         if (ipx_nullnet(work) && ipx_nullhost(work)) {
 344
 345                 if (port)
 346                         kprintf("*.%x", port);
 347                 else
 348                         kprintf("*.*");
 349
 350                 return;
 351         }
 352
 353         if (ipx_wildnet(work))
 354                 net = "any";
 355         else if (ipx_nullnet(work))
 356                 net = "*";
 357         else {
 358                 q = work.x_net.c_net;
 359                 ksnprintf(cnet, sizeof(cnet), "%x%x%x%x",
 360                         q[0], q[1], q[2], q[3]);
 361                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
 362                         continue;
 363                 net = p;
 364         }
 365
 366         if (ipx_wildhost(work))
 367                 host = "any";
 368         else if (ipx_nullhost(work))
 369                 host = "*";
 370         else {
 371                 q = work.x_host.c_host;
 372                 ksnprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
 373                         q[0], q[1], q[2], q[3], q[4], q[5]);
 374                 for (p = chost; *p == '0' && p < chost + 12; p++)
 375                         continue;
 376                 host = p;
 377         }
 378
 379         if (port) {
 380                 if (strcmp(host, "*") == 0) {
 381                         host = "";
 382                         ksnprintf(cport, sizeof(cport), "%x", port);
 383                 } else
 384                         ksnprintf(cport, sizeof(cport), ".%x", port);
 385         } else
 386                 *cport = 0;
 387
 388         kprintf("%s.%s%s", net, host, cport);
 389 }