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 1.13 2006/12/22 23:57:54 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 (oia == NULL)
 134                                 return (ENOBUFS);
 135                         if ((ia = ipx_ifaddr) != NULL) {
 136                                 for ( ; ia->ia_next != NULL; ia = ia->ia_next)
 137                                         ;
 138                                 ia->ia_next = oia;
 139                         } else
 140                                 ipx_ifaddr = oia;
 141                         ia = oia;
 142                         ifa = (struct ifaddr *)ia;
 143                         TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
 144                         ia->ia_ifp = ifp;
 145                         ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
 146
 147                         ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
 148
 149                         ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
 150                         if (ifp->if_flags & IFF_BROADCAST) {
 151                                 ia->ia_broadaddr.sipx_family = AF_IPX;
 152                                 ia->ia_broadaddr.sipx_len = sizeof(ia->ia_addr);
 153                                 ia->ia_broadaddr.sipx_addr.x_host = ipx_broadhost;
 154                         }
 155                 }
 156         }
 157
 158         switch (cmd) {
 159
 160         case SIOCSIFDSTADDR:
 161                 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
 162                         return (EINVAL);
 163                 if (ia->ia_flags & IFA_ROUTE) {
 164                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 165                         ia->ia_flags &= ~IFA_ROUTE;
 166                 }
 167                 if (ifp->if_ioctl) {
 168                         lwkt_serialize_enter(ifp->if_serializer);
 169                         error = ifp->if_ioctl(ifp, SIOCSIFDSTADDR,
 170                                               (void *)ia, td->td_proc->p_ucred);
 171                         lwkt_serialize_exit(ifp->if_serializer);
 172                         if (error)
 173                                 return (error);
 174                 }
 175                 *(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
 176                 return (0);
 177
 178         case SIOCSIFADDR:
 179                 return (ipx_ifinit(ifp, ia,
 180                                 (struct sockaddr_ipx *)&ifr->ifr_addr, 1));
 181
 182         case SIOCDIFADDR:
 183                 ipx_ifscrub(ifp, ia);
 184                 ifa = (struct ifaddr *)ia;
 185                 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
 186                 oia = ia;
 187                 if (oia == (ia = ipx_ifaddr)) {
 188                         ipx_ifaddr = ia->ia_next;
 189                 } else {
 190                         while (ia->ia_next && (ia->ia_next != oia)) {
 191                                 ia = ia->ia_next;
 192                         }
 193                         if (ia->ia_next)
 194                             ia->ia_next = oia->ia_next;
 195                         else
 196                                 kprintf("Didn't unlink ipxifadr from list\n");
 197                 }
 198                 IFAFREE((&oia->ia_ifa));
 199                 return (0);
 200
 201         case SIOCAIFADDR:
 202                 dstIsNew = 0;
 203                 hostIsNew = 1;
 204                 if (ia->ia_addr.sipx_family == AF_IPX) {
 205                         if (ifra->ifra_addr.sipx_len == 0) {
 206                                 ifra->ifra_addr = ia->ia_addr;
 207                                 hostIsNew = 0;
 208                         } else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
 209                                          ia->ia_addr.sipx_addr))
 210                                 hostIsNew = 0;
 211                 }
 212                 if ((ifp->if_flags & IFF_POINTOPOINT) &&
 213                     (ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
 214                         if (hostIsNew == 0)
 215                                 ipx_ifscrub(ifp, ia);
 216                         ia->ia_dstaddr = ifra->ifra_dstaddr;
 217                         dstIsNew  = 1;
 218                 }
 219                 if (ifra->ifra_addr.sipx_family == AF_IPX &&
 220                                             (hostIsNew || dstIsNew))
 221                         error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
 222                 return (error);
 223
 224         default:
 225                 if (ifp->if_ioctl == NULL)
 226                         return (EOPNOTSUPP);
 227                 lwkt_serialize_enter(ifp->if_serializer);
 228                 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
 229                 lwkt_serialize_exit(ifp->if_serializer);
 230                 return (error);
 231         }
 232 }
 233
 234 /*
 235 * Delete any previous route for an old address.
 236 */
 237 static void
 238 ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia)
 239 {
 240         if (ia->ia_flags & IFA_ROUTE) {
 241                 if (ifp->if_flags & IFF_POINTOPOINT) {
 242                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
 243                 } else
 244                         rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
 245                 ia->ia_flags &= ~IFA_ROUTE;
 246         }
 247 }
 248 /*
 249  * Initialize an interface's internet address
 250  * and routing table entry.
 251  */
 252 static int
 253 ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
 254            struct sockaddr_ipx *sipx, int scrub)
 255 {
 256         struct sockaddr_ipx oldaddr;
 257         int error;
 258
 259         /*
 260          * Set up new addresses.
 261          */
 262         oldaddr = ia->ia_addr;
 263         ia->ia_addr = *sipx;
 264
 265         /*
 266          * The convention we shall adopt for naming is that
 267          * a supplied address of zero means that "we don't care".
 268          * Use the MAC address of the interface. If it is an
 269          * interface without a MAC address, like a serial line, the
 270          * address must be supplied.
 271          *
 272          * Give the interface a chance to initialize
 273          * if this is its first address,
 274          * and to validate the address if necessary.
 275          */
 276         lwkt_serialize_enter(ifp->if_serializer);
 277         if (ifp->if_ioctl != NULL &&
 278             (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (void *)ia,
 279                                       (struct ucred *)NULL))) {
 280                 ia->ia_addr = oldaddr;
 281                 lwkt_serialize_exit(ifp->if_serializer);
 282                 return (error);
 283         }
 284         lwkt_serialize_exit(ifp->if_serializer);
 285         ia->ia_ifa.ifa_metric = ifp->if_metric;
 286         /*
 287          * Add route for the network.
 288          */
 289         if (scrub) {
 290                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
 291                 ipx_ifscrub(ifp, ia);
 292                 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
 293         }
 294         if (ifp->if_flags & IFF_POINTOPOINT)
 295                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
 296         else {
 297                 ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
 298                 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
 299         }
 300         ia->ia_flags |= IFA_ROUTE;
 301         return (0);
 302 }
 303
 304 /*
 305  * Return address info for specified internet network.
 306  */
 307 struct ipx_ifaddr *
 308 ipx_iaonnetof(struct ipx_addr *dst)
 309 {
 310         struct ipx_ifaddr *ia;
 311         struct ipx_addr *compare;
 312         struct ifnet *ifp;
 313         struct ipx_ifaddr *ia_maybe = NULL;
 314         union ipx_net net = dst->x_net;
 315
 316         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next) {
 317                 if ((ifp = ia->ia_ifp) != NULL) {
 318                         if (ifp->if_flags & IFF_POINTOPOINT) {
 319                                 compare = &satoipx_addr(ia->ia_dstaddr);
 320                                 if (ipx_hosteq(*dst, *compare))
 321                                         return (ia);
 322                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 323                                         ia_maybe = ia;
 324                         } else {
 325                                 if (ipx_neteqnn(net, ia->ia_addr.sipx_addr.x_net))
 326                                         return (ia);
 327                         }
 328                 }
 329         }
 330         return (ia_maybe);
 331 }
 332
 333
 334 void
 335 ipx_printhost(struct ipx_addr *addr)
 336 {
 337         u_short port;
 338         struct ipx_addr work = *addr;
 339         char *p; u_char *q;
 340         char *net = "", *host = "";
 341         char cport[10], chost[15], cnet[15];
 342
 343         port = ntohs(work.x_port);
 344
 345         if (ipx_nullnet(work) && ipx_nullhost(work)) {
 346
 347                 if (port)
 348                         kprintf("*.%x", port);
 349                 else
 350                         kprintf("*.*");
 351
 352                 return;
 353         }
 354
 355         if (ipx_wildnet(work))
 356                 net = "any";
 357         else if (ipx_nullnet(work))
 358                 net = "*";
 359         else {
 360                 q = work.x_net.c_net;
 361                 ksnprintf(cnet, sizeof(cnet), "%x%x%x%x",
 362                         q[0], q[1], q[2], q[3]);
 363                 for (p = cnet; *p == '0' && p < cnet + 8; p++)
 364                         continue;
 365                 net = p;
 366         }
 367
 368         if (ipx_wildhost(work))
 369                 host = "any";
 370         else if (ipx_nullhost(work))
 371                 host = "*";
 372         else {
 373                 q = work.x_host.c_host;
 374                 ksnprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
 375                         q[0], q[1], q[2], q[3], q[4], q[5]);
 376                 for (p = chost; *p == '0' && p < chost + 12; p++)
 377                         continue;
 378                 host = p;
 379         }
 380
 381         if (port) {
 382                 if (strcmp(host, "*") == 0) {
 383                         host = "";
 384                         ksnprintf(cport, sizeof(cport), "%x", port);
 385                 } else
 386                         ksnprintf(cport, sizeof(cport), ".%x", port);
 387         } else
 388                 *cport = 0;
 389
 390         kprintf("%s.%s%s", net, host, cport);
 391 }