[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD10  -  FREEBSD9  -  FREEBSD92  -  FREEBSD91  -  FREEBSD90  -  FREEBSD8  -  FREEBSD82  -  FREEBSD81  -  FREEBSD80  -  FREEBSD7  -  FREEBSD74  -  FREEBSD73  -  FREEBSD72  -  FREEBSD71  -  FREEBSD70  -  FREEBSD6  -  FREEBSD64  -  FREEBSD63  -  FREEBSD62  -  FREEBSD61  -  FREEBSD60  -  FREEBSD5  -  FREEBSD55  -  FREEBSD54  -  FREEBSD53  -  FREEBSD52  -  FREEBSD51  -  FREEBSD50  -  FREEBSD4  -  FREEBSD3  -  FREEBSD22  -  cheribsd  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1  -  FREEBSD-LIBC  -  FREEBSD8-LIBC  -  FREEBSD7-LIBC  -  FREEBSD6-LIBC  -  GLIBC27 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: if_atm.c,v 1.17 2005/02/02 21:41:01 perry 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 
   35 /*
   36  * IP <=> ATM address resolution.
   37  */
   38 
   39 #include <sys/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: if_atm.c,v 1.17 2005/02/02 21:41:01 perry Exp $");
   41 
   42 #include "opt_inet.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/malloc.h>
   50 #include <sys/mbuf.h>
   51 #include <sys/socket.h>
   52 #include <sys/time.h>
   53 #include <sys/kernel.h>
   54 #include <sys/errno.h>
   55 #include <sys/ioctl.h>
   56 #include <sys/syslog.h>
   57 #include <sys/proc.h>
   58 
   59 #include <net/if.h>
   60 #include <net/if_dl.h>
   61 #include <net/route.h>
   62 #include <net/if_atm.h>
   63 
   64 #include <netinet/in.h>
   65 #include <netinet/in_systm.h>
   66 #include <netinet/in_var.h>
   67 #include <netinet/ip.h>
   68 #include <netinet/if_atm.h>
   69 
   70 #ifdef NATM
   71 #include <netnatm/natm.h>
   72 #endif
   73 
   74 
   75 #define SDL(s) ((struct sockaddr_dl *)s)
   76 
   77 /*
   78  * atm_rtrequest: handle ATM rt request (in support of generic code)
   79  *   inputs: "req" = request code
   80  *           "rt" = route entry
   81  *           "sa" = sockaddr
   82  */
   83 
   84 void
   85 atm_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
   86 {
   87         struct sockaddr *gate = rt->rt_gateway;
   88         struct atm_pseudoioctl api;
   89 #ifdef NATM
   90         struct sockaddr_in *sin;
   91         struct natmpcb *npcb = NULL;
   92         struct atm_pseudohdr *aph;
   93 #endif
   94         static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
   95 
   96         if (rt->rt_flags & RTF_GATEWAY)   /* link level requests only */
   97                 return;
   98 
   99         switch (req) {
  100 
  101         case RTM_RESOLVE: /* resolve: only happens when cloning */
  102                 printf("atm_rtrequest: RTM_RESOLVE request detected?\n");
  103                 break;
  104 
  105         case RTM_ADD:
  106 
  107                 /*
  108                  * route added by a command (e.g. ifconfig, route, arp...).
  109                  *
  110                  * first check to see if this is not a host route, in which
  111                  * case we are being called via "ifconfig" to set the address.
  112                  */
  113 
  114                 if ((rt->rt_flags & RTF_HOST) == 0) {
  115                         rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl);
  116                         gate = rt->rt_gateway;
  117                         SDL(gate)->sdl_type = rt->rt_ifp->if_type;
  118                         SDL(gate)->sdl_index = rt->rt_ifp->if_index;
  119                         break;
  120                 }
  121 
  122                 if ((rt->rt_flags & RTF_CLONING) != 0) {
  123                         printf("atm_rtrequest: cloning route detected?\n");
  124                         break;
  125                 }
  126                 if (gate->sa_family != AF_LINK ||
  127                     gate->sa_len < sizeof(null_sdl)) {
  128                         log(LOG_DEBUG, "atm_rtrequest: bad gateway value");
  129                         break;
  130                 }
  131 
  132 #ifdef DIAGNOSTIC
  133                 if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl");
  134 #endif
  135 
  136 #ifdef NATM
  137                 /*
  138                  * let native ATM know we are using this VCI/VPI
  139                  * (i.e. reserve it)
  140                  */
  141                 sin = (struct sockaddr_in *) rt_key(rt);
  142                 if (sin->sin_family != AF_INET)
  143                         goto failed;
  144                 aph = (struct atm_pseudohdr *) LLADDR(SDL(gate));
  145                 npcb = npcb_add(NULL, rt->rt_ifp, ATM_PH_VCI(aph),
  146                                                 ATM_PH_VPI(aph));
  147                 if (npcb == NULL)
  148                         goto failed;
  149                 npcb->npcb_flags |= NPCB_IP;
  150                 npcb->ipaddr.s_addr = sin->sin_addr.s_addr;
  151                 /* XXX: move npcb to llinfo when ATM ARP is ready */
  152                 rt->rt_llinfo = (caddr_t) npcb;
  153                 rt->rt_flags |= RTF_LLINFO;
  154 #endif
  155                 /*
  156                  * let the lower level know this circuit is active
  157                  */
  158                 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
  159                 api.rxhand = NULL;
  160                 if (rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMENA,
  161                                                         (caddr_t)&api) != 0) {
  162                         printf("atm: couldn't add VC\n");
  163                         goto failed;
  164                 }
  165 
  166                 SDL(gate)->sdl_type = rt->rt_ifp->if_type;
  167                 SDL(gate)->sdl_index = rt->rt_ifp->if_index;
  168 
  169                 break;
  170 
  171 failed:
  172 #ifdef NATM
  173                 if (npcb) {
  174                         npcb_free(npcb, NPCB_DESTROY);
  175                         rt->rt_llinfo = NULL;
  176                         rt->rt_flags &= ~RTF_LLINFO;
  177                 }
  178 #endif
  179                 rtrequest(RTM_DELETE, rt_key(rt), (struct sockaddr *)0,
  180                         rt_mask(rt), 0, (struct rtentry **) 0);
  181                 break;
  182 
  183         case RTM_DELETE:
  184 
  185 #ifdef NATM
  186                 /*
  187                  * tell native ATM we are done with this VC
  188                  */
  189 
  190                 if (rt->rt_flags & RTF_LLINFO) {
  191                         npcb_free((struct natmpcb *)rt->rt_llinfo,
  192                                                                 NPCB_DESTROY);
  193                         rt->rt_llinfo = NULL;
  194                         rt->rt_flags &= ~RTF_LLINFO;
  195                 }
  196 #endif
  197                 /*
  198                  * tell the lower layer to disable this circuit
  199                  */
  200 
  201                 bcopy(LLADDR(SDL(gate)), &api.aph, sizeof(api.aph));
  202                 api.rxhand = NULL;
  203                 (void)rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMDIS,
  204                                                         (caddr_t)&api);
  205 
  206                 break;
  207         }
  208 }
  209 
  210 /*
  211  * atmresolve:
  212  *   inputs:
  213  *     [1] "rt" = the link level route to use (or null if need to look one up)
  214  *     [2] "m" = mbuf containing the data to be sent
  215  *     [3] "dst" = sockaddr_in (IP) address of dest.
  216  *   output:
  217  *     [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info
  218  *   return:
  219  *     0 == resolve FAILED; note that "m" gets m_freem'd in this case
  220  *     1 == resolve OK; desten contains result
  221  *
  222  *   XXX: will need more work if we wish to support ATMARP in the kernel,
  223  *   but this is enough for PVCs entered via the "route" command.
  224  */
  225 
  226 int
  227 atmresolve(struct rtentry *rt, struct mbuf *m, struct sockaddr *dst,
  228     struct atm_pseudohdr *desten /* OUT */)
  229 {
  230         struct sockaddr_dl *sdl;
  231 
  232         if (m->m_flags & (M_BCAST|M_MCAST)) {
  233                 log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped");
  234                 goto bad;
  235         }
  236 
  237         if (rt == NULL) {
  238                 rt = RTALLOC1(dst, 0);
  239                 if (rt == NULL) goto bad; /* failed */
  240                 rt->rt_refcnt--;        /* don't keep LL references */
  241                 if ((rt->rt_flags & RTF_GATEWAY) != 0 ||
  242                         (rt->rt_flags & RTF_LLINFO) == 0 ||
  243                         /* XXX: are we using LLINFO? */
  244                         rt->rt_gateway->sa_family != AF_LINK) {
  245                                 goto bad;
  246                 }
  247         }
  248 
  249         /*
  250          * note that rt_gateway is a sockaddr_dl which contains the
  251          * atm_pseudohdr data structure for this route.   we currently
  252          * don't need any rt_llinfo info (but will if we want to support
  253          * ATM ARP [c.f. if_ether.c]).
  254          */
  255 
  256         sdl = SDL(rt->rt_gateway);
  257 
  258         /*
  259          * Check the address family and length is valid, the address
  260          * is resolved; otherwise, try to resolve.
  261          */
  262 
  263 
  264         if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) {
  265                 bcopy(LLADDR(sdl), desten, sdl->sdl_alen);
  266                 return (1);     /* ok, go for it! */
  267         }
  268 
  269         /*
  270          * we got an entry, but it doesn't have valid link address
  271          * info in it (it is prob. the interface route, which has
  272          * sdl_alen == 0).    dump packet.  (fall through to "bad").
  273          */
  274 
  275 bad:
  276         m_freem(m);
  277         return (0);
  278 }
  279 #endif /* INET */

Cache object: 72a288538d069f2b73f8551f492b805e


[ 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.