diff options
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/if_atm.c | 222 | ||||
| -rw-r--r-- | sys/netinet/if_atm.h | 42 |
2 files changed, 264 insertions, 0 deletions
diff --git a/sys/netinet/if_atm.c b/sys/netinet/if_atm.c new file mode 100644 index 00000000000..eb0e52e759b --- /dev/null +++ b/sys/netinet/if_atm.c @@ -0,0 +1,222 @@ +/* $OpenBSD: if_atm.c,v 1.1 1996/06/21 15:14:35 chuck Exp $ */ + +/* + * + * Copyright (c) 1996 Charles D. Cranor + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Charles D. Cranor. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * IP <=> ATM address resolution. + */ + +#ifdef INET + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/socket.h> +#include <sys/time.h> +#include <sys/kernel.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/syslog.h> +#include <sys/proc.h> + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/route.h> +#include <net/if_atm.h> + +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/in_var.h> +#include <netinet/ip.h> +#include <netinet/if_atm.h> + +#define SDL(s) ((struct sockaddr_dl *)s) + +/* + * atm_rtrequest: handle ATM rt request (in support of generic code) + * inputs: "req" = request code + * "rt" = route entry + * "sa" = sockaddr + */ + +void +atm_rtrequest(req, rt, sa) + int req; + register struct rtentry *rt; + struct sockaddr *sa; +{ + register struct sockaddr *gate = rt->rt_gateway; + static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; + + if (rt->rt_flags & RTF_GATEWAY) /* link level requests only */ + return; + + switch (req) { + + case RTM_RESOLVE: /* resolve: only happens when cloning */ + printf("atm_rtrequest: RTM_RESOLVE request detected?\n"); + break; + + case RTM_ADD: + + /* + * route added by a command (e.g. ifconfig, route, arp...). + * + * first check to see if this is not a host route, in which + * case we are being called via "ifconfig" to set the address. + */ + + if ((rt->rt_flags & RTF_HOST) == 0) { + rt_setgate(rt,rt_key(rt),(struct sockaddr *)&null_sdl); + gate = rt->rt_gateway; + SDL(gate)->sdl_type = rt->rt_ifp->if_type; + SDL(gate)->sdl_index = rt->rt_ifp->if_index; + break; + } + + if ((rt->rt_flags & RTF_CLONING) != 0) { + printf("atm_rtrequest: cloning route detected?\n"); + break; + } + if (gate->sa_family != AF_LINK || + gate->sa_len < sizeof(null_sdl)) { + log(LOG_DEBUG, "atm_rtrequest: bad gateway value"); + break; + } + +#ifdef DIAGNOSTIC + if (rt->rt_ifp->if_ioctl == NULL) panic("atm null ioctl"); +#endif + + /* + * let the lower level know this circuit is active + */ + if (rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMENA, + LLADDR(SDL(gate))) != 0) { + printf("atm: couldn't add VC\n"); + /* XXX: do we need to do anything else to recover? */ + break; + } + + SDL(gate)->sdl_type = rt->rt_ifp->if_type; + SDL(gate)->sdl_index = rt->rt_ifp->if_index; + + break; + + case RTM_DELETE: + + /* + * tell the lower layer to disable this circuit + */ + (void)rt->rt_ifp->if_ioctl(rt->rt_ifp, SIOCATMDIS, + LLADDR(SDL(gate))); + + break; + } +} + +/* + * atmresolve: + * inputs: + * [1] "rt" = the link level route to use (or null if need to look one up) + * [2] "m" = mbuf containing the data to be sent + * [3] "dst" = sockaddr_in (IP) address of dest. + * output: + * [4] "desten" = ATM pseudo header which we will fill in VPI/VCI info + * return: + * 0 == resolve FAILED; note that "m" gets m_freem'd in this case + * 1 == resolve OK; desten contains result + * + * XXX: will need more work if we wish to support ATMARP in the kernel, + * but this is enough for PVCs entered via the "route" command. + */ + +int +atmresolve(rt, m, dst, desten) + +register struct rtentry *rt; +struct mbuf *m; +register struct sockaddr *dst; +register struct atm_pseudohdr *desten; /* OUT */ + +{ + struct sockaddr_dl *sdl; + + if (m->m_flags & (M_BCAST|M_MCAST)) { + log(LOG_INFO, "atmresolve: BCAST/MCAST packet detected/dumped"); + goto bad; + } + + if (rt == NULL) { + rt = rtalloc1(dst, 0); + if (rt == NULL) goto bad; /* failed */ + rt->rt_refcnt--; /* don't keep LL references */ + if ((rt->rt_flags & RTF_GATEWAY) != 0 || + (rt->rt_flags & RTF_LLINFO) == 0 || + /* XXX: are we using LLINFO? */ + rt->rt_gateway->sa_family != AF_LINK) { + goto bad; + } + } + + /* + * note that rt_gateway is a sockaddr_dl which contains the + * atm_pseudohdr data structure for this route. we currently + * don't need any rt_llinfo info (but will if we want to support + * ATM ARP [c.f. if_ether.c]). + */ + + sdl = SDL(rt->rt_gateway); + + /* + * Check the address family and length is valid, the address + * is resolved; otherwise, try to resolve. + */ + + + if (sdl->sdl_family == AF_LINK && sdl->sdl_alen == sizeof(*desten)) { + bcopy(LLADDR(sdl), desten, sdl->sdl_alen); + return(1); /* ok, go for it! */ + } + + /* + * we got an entry, but it doesn't have valid link address + * info in it (it is prob. the interface route, which has + * sdl_alen == 0). dump packet. (fall through to "bad"). + */ + +bad: + m_freem(m); + return(0); +} +#endif /* INET */ diff --git a/sys/netinet/if_atm.h b/sys/netinet/if_atm.h new file mode 100644 index 00000000000..054cd1a2e99 --- /dev/null +++ b/sys/netinet/if_atm.h @@ -0,0 +1,42 @@ +/* $OpenBSD: if_atm.h,v 1.1 1996/06/21 15:14:35 chuck Exp $ */ + +/* + * + * Copyright (c) 1996 Charles D. Cranor + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Charles D. Cranor. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * if_atm.h + */ + +#ifdef _KERNEL +void atm_rtrequest __P((int, struct rtentry *, struct sockaddr *)); +int atmresolve __P((struct rtentry *, struct mbuf *, struct sockaddr *, + struct atm_pseudohdr *)); +#endif /* _KERNEL */ |