ipx_outputfl.c

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    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_outputfl.c
   35  */
   36 
   37 #include <sys/cdefs.h>
   38 __FBSDID("$FreeBSD: releng/6.3/sys/netipx/ipx_outputfl.c 139823 2005-01-07 01:45:51Z imp $");
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/mbuf.h>
   43 #include <sys/socket.h>
   44 
   45 #include <net/if.h>
   46 #include <net/route.h>
   47 
   48 #include <netipx/ipx.h>
   49 #include <netipx/ipx_if.h>
   50 #include <netipx/ipx_var.h>
   51 
   52 static int ipx_copy_output = 0;
   53 
   54 int
   55 ipx_outputfl(m0, ro, flags)
   56         struct mbuf *m0;
   57         struct route *ro;
   58         int flags;
   59 {
   60         register struct ipx *ipx = mtod(m0, struct ipx *);
   61         register struct ifnet *ifp = NULL;
   62         int error = 0;
   63         struct sockaddr_ipx *dst;
   64         struct route ipxroute;
   65 
   66         /*
   67          * Route packet.
   68          */
   69         if (ro == NULL) {
   70                 ro = &ipxroute;
   71                 bzero((caddr_t)ro, sizeof(*ro));
   72         }
   73         dst = (struct sockaddr_ipx *)&ro->ro_dst;
   74         if (ro->ro_rt == NULL) {
   75                 dst->sipx_family = AF_IPX;
   76                 dst->sipx_len = sizeof(*dst);
   77                 dst->sipx_addr = ipx->ipx_dna;
   78                 dst->sipx_addr.x_port = 0;
   79                 /*
   80                  * If routing to interface only,
   81                  * short circuit routing lookup.
   82                  */
   83                 if (flags & IPX_ROUTETOIF) {
   84                         struct ipx_ifaddr *ia = ipx_iaonnetof(&ipx->ipx_dna);
   85 
   86                         if (ia == NULL) {
   87                                 ipxstat.ipxs_noroute++;
   88                                 error = ENETUNREACH;
   89                                 goto bad;
   90                         }
   91                         ifp = ia->ia_ifp;
   92                         goto gotif;
   93                 }
   94                 rtalloc_ign(ro, 0);
   95         } else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
   96                 /*
   97                  * The old route has gone away; try for a new one.
   98                  */
   99                 RTFREE(ro->ro_rt);
  100                 ro->ro_rt = NULL;
  101                 rtalloc_ign(ro, 0);
  102         }
  103         if (ro->ro_rt == NULL || (ifp = ro->ro_rt->rt_ifp) == NULL) {
  104                 ipxstat.ipxs_noroute++;
  105                 error = ENETUNREACH;
  106                 goto bad;
  107         }
  108         ro->ro_rt->rt_use++;
  109         if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
  110                 dst = (struct sockaddr_ipx *)ro->ro_rt->rt_gateway;
  111 gotif:
  112         /*
  113          * Look for multicast addresses and
  114          * and verify user is allowed to send
  115          * such a packet.
  116          */
  117         if (dst->sipx_addr.x_host.c_host[0]&1) {
  118                 if ((ifp->if_flags & (IFF_BROADCAST | IFF_LOOPBACK)) == 0) {
  119                         error = EADDRNOTAVAIL;
  120                         goto bad;
  121                 }
  122                 if ((flags & IPX_ALLOWBROADCAST) == 0) {
  123                         error = EACCES;
  124                         goto bad;
  125                 }
  126                 m0->m_flags |= M_BCAST;
  127         }
  128 
  129         if (htons(ipx->ipx_len) <= ifp->if_mtu) {
  130                 ipxstat.ipxs_localout++;
  131                 if (ipx_copy_output) {
  132                         ipx_watch_output(m0, ifp);
  133                 }
  134                 error = (*ifp->if_output)(ifp, m0,
  135                                         (struct sockaddr *)dst, ro->ro_rt);
  136                 goto done;
  137         } else {
  138                 ipxstat.ipxs_mtutoosmall++;
  139                 error = EMSGSIZE;
  140         }
  141 bad:
  142         if (ipx_copy_output) {
  143                 ipx_watch_output(m0, ifp);
  144         }
  145         m_freem(m0);
  146 done:
  147         if (ro == &ipxroute && (flags & IPX_ROUTETOIF) == 0 &&
  148             ro->ro_rt != NULL) {
  149                 RTFREE(ro->ro_rt);
  150                 ro->ro_rt = NULL;
  151         }
  152         return (error);
  153 }
  154 
  155 /*
  156  * This will broadcast the type 20 (Netbios) packet to all the interfaces
  157  * that have ipx configured and isn't in the list yet.
  158  */
  159 int
  160 ipx_output_type20(m)
  161         struct mbuf *m;
  162 {
  163         register struct ipx *ipx;
  164         union ipx_net *nbnet;
  165         struct ipx_ifaddr *ia, *tia = NULL;
  166         int error = 0;
  167         struct mbuf *m1;
  168         int i;
  169         struct ifnet *ifp;
  170         struct sockaddr_ipx dst;
  171 
  172         /*
  173          * We have to get to the 32 bytes after the ipx header also, so
  174          * that we can fill in the network address of the receiving
  175          * interface.
  176          */
  177         if ((m->m_flags & M_EXT || m->m_len < (sizeof(struct ipx) + 32)) &&
  178             (m = m_pullup(m, sizeof(struct ipx) + 32)) == NULL) {
  179                 ipxstat.ipxs_toosmall++;
  180                 return (0);
  181         }
  182         ipx = mtod(m, struct ipx *);
  183         nbnet = (union ipx_net *)(ipx + 1);
  184 
  185         if (ipx->ipx_tc >= 8)
  186                 goto bad;
  187         /*
  188          * Now see if we have already seen this.
  189          */
  190         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
  191                 if(ia->ia_ifa.ifa_ifp == m->m_pkthdr.rcvif) {
  192                         if(tia == NULL)
  193                                 tia = ia;
  194 
  195                         for (i=0;i<ipx->ipx_tc;i++,nbnet++)
  196                                 if(ipx_neteqnn(ia->ia_addr.sipx_addr.x_net,
  197                                                         *nbnet))
  198                                         goto bad;
  199                 }
  200         /*
  201          * Don't route the packet if the interface where it come from
  202          * does not have an IPX address.
  203          */
  204         if(tia == NULL)
  205                 goto bad;
  206 
  207         /*
  208          * Add our receiving interface to the list.
  209          */
  210         nbnet = (union ipx_net *)(ipx + 1);
  211         nbnet += ipx->ipx_tc;
  212         *nbnet = tia->ia_addr.sipx_addr.x_net;
  213 
  214         /*
  215          * Increment the hop count.
  216          */
  217         ipx->ipx_tc++;
  218         ipxstat.ipxs_forward++;
  219 
  220         /*
  221          * Send to all directly connected ifaces not in list and
  222          * not to the one it came from.
  223          */
  224         m->m_flags &= ~M_BCAST;
  225         bzero(&dst, sizeof(dst));
  226         dst.sipx_family = AF_IPX;
  227         dst.sipx_len = 12;
  228         dst.sipx_addr.x_host = ipx_broadhost;
  229 
  230         for (ia = ipx_ifaddr; ia != NULL; ia = ia->ia_next)
  231                 if(ia->ia_ifa.ifa_ifp != m->m_pkthdr.rcvif) {
  232                         nbnet = (union ipx_net *)(ipx + 1);
  233                         for (i=0;i<ipx->ipx_tc;i++,nbnet++)
  234                                 if(ipx_neteqnn(ia->ia_addr.sipx_addr.x_net,
  235                                                         *nbnet))
  236                                         goto skip_this;
  237 
  238                         /*
  239                          * Insert the net address of the dest net and
  240                          * calculate the new checksum if needed.
  241                          */
  242                         ifp = ia->ia_ifa.ifa_ifp;
  243                         dst.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
  244                         ipx->ipx_dna.x_net = dst.sipx_addr.x_net;
  245                         if(ipx->ipx_sum != 0xffff)
  246                                 ipx->ipx_sum = ipx_cksum(m, ntohs(ipx->ipx_len));
  247 
  248                         m1 = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
  249                         if(m1) {
  250                                 error = (*ifp->if_output)(ifp, m1,
  251                                         (struct sockaddr *)&dst, NULL);
  252                                 /* XXX ipxstat.ipxs_localout++; */
  253                         }
  254 skip_this: ;
  255                 }
  256 
  257 bad:
  258         m_freem(m);
  259         return (error);
  260 }

Cache object: fdda864485e738224d7cc366ba331985

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FreeBSD/Linux Kernel Cross Reference sys/netipx/ipx_outputfl.c

FreeBSD/Linux Kernel Cross Reference
sys/netipx/ipx_outputfl.c