if_atm.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 /*      $NetBSD: if_atm.c,v 1.6 1996/10/13 02:03:01 christos Exp $       */
    2 
    3 /*
    4  *
    5  * Copyright (c) 1996 Charles D. Cranor and Washington University.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by Charles D. Cranor and 
   19  *      Washington University.
   20  * 4. The name of the author may not be used to endorse or promote products
   21  *    derived from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  * $FreeBSD: releng/5.1/sys/netinet/if_atm.c 97074 2002-05-21 18:52:24Z arr $
   35  */
   36 
   37 /*
   38  * IP <=> ATM address resolution.
   39  */
   40 
   41 #include "opt_inet.h"
   42 #include "opt_inet6.h"
   43 #include "opt_natm.h"
   44 
   45 #if defined(INET) || defined(INET6)
   46 
   47 #include <sys/param.h>
   48 #include <sys/systm.h>
   49 #include <sys/queue.h>
   50 #include <sys/mbuf.h>
   51 #include <sys/socket.h>
   52 #include <sys/sockio.h>
   53 #include <sys/syslog.h>
   54 
   55 #include <net/if.h>
   56 #include <net/if_dl.h>
   57 #include <net/route.h>
   58 #include <net/if_atm.h>
   59 
   60 #include <netinet/in.h>
   61 #include <netinet/if_atm.h>
   62 
   63 #ifdef NATM
   64 #include <netnatm/natm.h>
   65 #endif
   66 
   67 
   68 #define SDL(s) ((struct sockaddr_dl *)s)
   69 
   70 /*
   71  * atm_rtrequest: handle ATM rt request (in support of generic code)
   72  *   inputs: "req" = request code
   73  *           "rt" = route entry
   74  *           "info" = rt_addrinfo
   75  */
   76 
   77 void
   78 atm_rtrequest(req, rt, info)
   79         int req;
   80         register struct rtentry *rt;
   81         struct rt_addrinfo *info;
   82 {
   83         register struct sockaddr *gate = rt->rt_gateway;
   84         struct atm_pseudoioctl api;
   85 #ifdef NATM
   86         struct sockaddr_in *sin;
   87         struct natmpcb *npcb = NULL;
   88         struct atm_pseudohdr *aph;
   89 #endif
   90         static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
   91 
   92         if (rt->rt_flags & RTF_GATEWAY)   /* link level requests only */
   93                 return;
   94 
   95         switch (req) {
   96 
   97         case RTM_RESOLVE: /* resolve: only happens when cloning */
   98                 printf("atm_rtrequest: RTM_RESOLVE request detected?\n");
   99                 break;
  100 
  101         case RTM_ADD:
  102 
  103                 /*
  104                  * route added by a command (e.g. ifconfig, route, arp...).
  105                  *
  106                  * first check to see if this is not a host route, in which
  107                  * case we are being called via "ifconfig" to set the address.
  108                  */
  109 
  110                 if ((rt->rt_flags & RTF_HOST) == 0) { 
  111                         rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
  112                         gate = rt->rt_gateway;
  113                         SDL(gate)->sdl_type = rt->rt_ifp->if_type;
  114                         SDL(gate)->sdl_index = rt->rt_ifp->if_index;
  115                         break;
  116                 }
  117 
  118                 if ((rt->rt_flags & RTF_CLONING) != 0) {
  119                         printf("atm_rtrequest: cloning route detected?\n");
  120                         break;
  121                 }
  122                 if (gate->sa_family != AF_LINK ||
  123                     gate->sa_len < sizeof(null_sdl)) {
  124                         log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
  125                         break;
  126                 }
  127 
  128                 KASSERT(rt->rt_ifp->if_ioctl != NULL,
  129                     ("atm_rtrequest: null ioctl"));
  130 #ifdef NATM
  131                 /*
  132                  * let native ATM know we are using this VCI/VPI
  133                  * (i.e. reserve it)
  134                  */
  135                 sin = (struct sockaddr_in *) rt_key(rt);
  136                 if (sin->sin_family != AF_INET)
  137                         goto failed;
  138                 aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
  139                 npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph), 
  140                                                 ATM_PH_VPI(aph));
  141                 if (npcb == NULL) 
  142                         goto failed;
  143                 npcb->npcb_flags |= NPCB_IP;
  144                 npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
  145                 /* XXX: move npcb to llinfo when ATM ARP is ready */
  146                 rt->rt_llinfo = (caddr_t) npcb;
  147                 rt->rt_flags |= RTF_LLINFO;
  148 #endif
  149                 /*
  150                  * let the lower level know this circuit is active
  151                  */
  152                 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
  153                 api.rxhand = NULL;
  154                 if (rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMENA, 
  155                                                         (caddr_t)&api) != 0) {
  156                         printf("atm: couldn't add VC\n");
  157                         goto failed;
  158                 }
  159 
  160                 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
  161                 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
  162 
  163                 break;
  164 
  165 failed:
  166 #ifdef NATM
  167                 if (npcb) {
  168                         npcb_free(npcb, NPCB_DESTROY);
  169                         rt->rt_llinfo = NULL;
  170                         rt->rt_flags &= ~RTF_LLINFO;
  171                 }
  172 #endif
  173                 rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
  174                         rt_mask(rt), 0, (struct rtentry **) 0);
  175                 break;
  176 
  177         case RTM_DELETE:
  178 
  179 #ifdef NATM
  180                 /*
  181                  * tell native ATM we are done with this VC
  182                  */
  183 
  184                 if (rt->rt_flags & RTF_LLINFO) {
  185                         npcb_free((struct natmpcb *)rt->rt_llinfo, 
  186                                                                 NPCB_DESTROY);
  187                         rt->rt_llinfo = NULL;
  188                         rt->rt_flags &= ~RTF_LLINFO;
  189                 }
  190 #endif
  191                 /*
  192                  * tell the lower layer to disable this circuit
  193                  */
  194 
  195                 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
  196                 api.rxhand = NULL;
  197                 (void)rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMDIS, 
  198                                                         (caddr_t)&api);
  199 
  200                 break;
  201         }
  202 }
  203 
  204 /*
  205  * atmresolve:
  206  *   inputs:
  207  *     [1] "rt" = the link level route to use (or null if need to look one up)
  208  *     [2] "m" = mbuf containing the data to be sent
  209  *     [3] "dst" = sockaddr_in (IP) address of dest.
  210  *   output:
  211  *     [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
  212  *   return: 
  213  *     0 == resolve FAILED; note that "m" gets m_freem'd in this case
  214  *     1 == resolve OK; desten contains result
  215  *
  216  *   XXX: will need more work if we wish to support ATMARP in the kernel,
  217  *   but this is enough for PVCs entered via the "route" command.
  218  */
  219 
  220 int
  221 atmresolve(rt, m, dst, desten)
  222 
  223 register struct rtentry *rt;
  224 struct mbuf *m;
  225 register struct sockaddr *dst;
  226 register struct atm_pseudohdr *desten;  /* OUT */
  227 
  228 {
  229         struct sockaddr_dl *sdl;
  230 
  231         if (m->m_flags & (M_BCAST|M_MCAST)) {
  232                 log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
  233                 goto bad;
  234         }
  235 
  236         if (rt == NULL) {
  237                 rt = RTALLOC1(dst, 0);
  238                 if (rt == NULL) goto bad; /* failed */
  239                 rt->rt_refcnt--;        /* don't keep LL references */
  240                 if ((rt->rt_flags & RTF_GATEWAY) != 0 || 
  241                         (rt->rt_flags & RTF_LLINFO) == 0 ||
  242                         /* XXX: are we using LLINFO? */
  243                         rt->rt_gateway->sa_family != AF_LINK) {
  244                                 goto bad;
  245                 }
  246         }
  247 
  248         /*
  249          * note that rt_gateway is a sockaddr_dl which contains the 
  250          * atm_pseudohdr data structure for this route.   we currently
  251          * don't need any rt_llinfo info (but will if we want to support
  252          * ATM ARP [c.f. if_ether.c]).
  253          */
  254 
  255         sdl = SDL(rt->rt_gateway);
  256 
  257         /*
  258          * Check the address family and length is valid, the address
  259          * is resolved; otherwise, try to resolve.
  260          */
  261 
  262 
  263         if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
  264                 bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
  265                 return(1);      /* ok, go for it! */
  266         }
  267 
  268         /*
  269          * we got an entry, but it doesn't have valid link address
  270          * info in it (it is prob. the interface route, which has
  271          * sdl_alen == 0).    dump packet.  (fall through to "bad").
  272          */
  273 
  274 bad:
  275         m_freem(m);
  276         return(0);
  277 }
  278 #endif /* INET */
Cache object: 387c31fb638ba8c8f70314ba2066eec3
[ 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.
FreeBSD/Linux Kernel Cross Reference sys/netinet/if_atm.c

FreeBSD/Linux Kernel Cross Reference
sys/netinet/if_atm.c
