567 lines
15 KiB
C
567 lines
15 KiB
C
/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
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* $Id: if_fddisubr.c,v 1.3 1995/03/16 18:14:26 bde Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <machine/cpu.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/if_llc.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#endif
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#include <netinet/if_ether.h>
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#include <netinet/if_fddi.h>
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#ifdef DECNET
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#include <netdnet/dn.h>
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#endif
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#ifdef ISO
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#include <netiso/argo_debug.h>
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#include <netiso/iso.h>
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#include <netiso/iso_var.h>
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#include <netiso/iso_snpac.h>
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#endif
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#include "bpfilter.h"
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#ifdef LLC
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#include <netccitt/dll.h>
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#include <netccitt/llc_var.h>
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#endif
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#if defined(LLC) && defined(CCITT)
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extern struct ifqueue pkintrq;
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#endif
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#define senderr(e) { error = (e); goto bad;}
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/*
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* This really should be defined in if_llc.h but in case it isn't.
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*/
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#ifndef llc_snap
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#define llc_snap llc_un.type_snap
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#endif
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#ifdef __bsdi__
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#define RTALLOC1(a, b) rtalloc1(a, b)
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#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e)
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#else
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#define RTALLOC1(a, b) rtalloc1(a, b, 0UL)
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#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f)
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#endif
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/*
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* FDDI output routine.
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* Encapsulate a packet of type family for the local net.
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* Use trailer local net encapsulation if enough data in first
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* packet leaves a multiple of 512 bytes of data in remainder.
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* Assumes that ifp is actually pointer to arpcom structure.
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*/
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int
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fddi_output(ifp, m0, dst, rt0)
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register struct ifnet *ifp;
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struct mbuf *m0;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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short type;
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int s, error = 0;
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u_char edst[6];
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register struct mbuf *m = m0;
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register struct rtentry *rt;
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struct mbuf *mcopy = (struct mbuf *)0;
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register struct fddi_header *fh;
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struct arpcom *ac = (struct arpcom *)ifp;
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if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
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senderr(ENETDOWN);
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ifp->if_lastchange = time;
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if (rt = rt0) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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if (rt0 = rt = RTALLOC1(dst, 1))
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rt->rt_refcnt--;
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else
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senderr(EHOSTUNREACH);
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}
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if (rt->rt_flags & RTF_GATEWAY) {
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if (rt->rt_gwroute == 0)
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goto lookup;
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if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
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rtfree(rt); rt = rt0;
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lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1);
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if ((rt = rt->rt_gwroute) == 0)
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senderr(EHOSTUNREACH);
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}
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}
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if (rt->rt_flags & RTF_REJECT)
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if (rt->rt_rmx.rmx_expire == 0 ||
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time.tv_sec < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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switch (dst->sa_family) {
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#ifdef INET
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case AF_INET:
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if (!ARPRESOLVE(ac, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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type = ETHERTYPE_IP;
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break;
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#endif
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#ifdef NS
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case AF_NS:
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type = ETHERTYPE_NS;
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bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst)))
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return (looutput(ifp, m, dst, rt));
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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break;
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#endif
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#ifdef ISO
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case AF_ISO: {
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int snpalen;
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struct llc *l;
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register struct sockaddr_dl *sdl;
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if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
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sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
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} else if (error =
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iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
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(char *)edst, &snpalen))
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goto bad; /* Not Resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if (*edst & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*fh), M_DONTWAIT);
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if (mcopy) {
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fh = mtod(mcopy, struct fddi_header *);
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bcopy((caddr_t)edst,
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(caddr_t)fh->fddi_dhost, sizeof (edst));
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bcopy((caddr_t)ac->ac_enaddr,
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(caddr_t)fh->fddi_shost, sizeof (edst));
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}
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}
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M_PREPEND(m, 3, M_DONTWAIT);
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if (m == NULL)
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return (0);
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type = 0;
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l = mtod(m, struct llc *);
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l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
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l->llc_control = LLC_UI;
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IFDEBUG(D_ETHER)
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int i;
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printf("unoutput: sending pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf("\n");
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ENDDEBUG
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} break;
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#endif /* ISO */
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#ifdef LLC
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/* case AF_NSAP: */
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case AF_CCITT: {
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register struct sockaddr_dl *sdl =
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(struct sockaddr_dl *) rt -> rt_gateway;
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if (sdl && sdl->sdl_family == AF_LINK
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&& sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (char *)edst,
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sizeof(edst));
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} else goto bad; /* Not a link interface ? Funny ... */
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if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*fh), M_DONTWAIT);
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if (mcopy) {
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fh = mtod(mcopy, struct fddi_header *);
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bcopy((caddr_t)edst,
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(caddr_t)fh->fddi_dhost, sizeof (edst));
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bcopy((caddr_t)ac->ac_enaddr,
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(caddr_t)fh->fddi_shost, sizeof (edst));
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fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
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}
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}
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type = 0;
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#ifdef LLC_DEBUG
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{
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int i;
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register struct llc *l = mtod(m, struct llc *);
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printf("fddi_output: sending LLC2 pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
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type & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
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l->llc_control & 0xff);
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}
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#endif /* LLC_DEBUG */
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} break;
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#endif /* LLC */
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case AF_UNSPEC:
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{
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struct ether_header *eh;
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst));
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if (*edst & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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type = eh->ether_type;
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break;
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}
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#if NBPFILTER > 0
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case AF_IMPLINK:
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{
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fh = mtod(m, struct fddi_header *);
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error = EPROTONOSUPPORT;
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switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
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case FDDIFC_LLC_ASYNC: {
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/* legal priorities are 0 through 7 */
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if ((fh->fddi_fc & FDDIFC_Z) > 7)
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goto bad;
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break;
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}
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case FDDIFC_LLC_SYNC: {
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/* FDDIFC_Z bits reserved, must be zero */
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if (fh->fddi_fc & FDDIFC_Z)
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goto bad;
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break;
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}
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case FDDIFC_SMT: {
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/* FDDIFC_Z bits must be non zero */
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if ((fh->fddi_fc & FDDIFC_Z) == 0)
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goto bad;
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break;
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}
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default: {
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/* anything else is too dangerous */
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goto bad;
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}
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}
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error = 0;
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if (fh->fddi_dhost[0] & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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goto queue_it;
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}
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#endif
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default:
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printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
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dst->sa_family);
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senderr(EAFNOSUPPORT);
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}
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if (mcopy)
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(void) looutput(ifp, mcopy, dst, rt);
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if (type != 0) {
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register struct llc *l;
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M_PREPEND(m, sizeof (struct llc), M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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l = mtod(m, struct llc *);
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l->llc_control = LLC_UI;
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l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
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l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0;
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type = ntohs(type);
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(void)memcpy((caddr_t) &l->llc_snap.ether_type, (caddr_t) &type,
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sizeof(u_short));
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}
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/*
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* Add local net header. If no space in first mbuf,
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* allocate another.
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*/
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M_PREPEND(m, sizeof (struct fddi_header), M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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fh = mtod(m, struct fddi_header *);
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fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
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(void)memcpy((caddr_t)fh->fddi_dhost, (caddr_t)edst, sizeof (edst));
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queue_it:
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(void)memcpy((caddr_t)fh->fddi_shost, (caddr_t)ac->ac_enaddr,
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sizeof(fh->fddi_shost));
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s = splimp();
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/*
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* Queue message on interface, and start output if interface
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* not yet active.
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*/
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if (IF_QFULL(&ifp->if_snd)) {
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IF_DROP(&ifp->if_snd);
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splx(s);
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senderr(ENOBUFS);
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}
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ifp->if_obytes += m->m_pkthdr.len;
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IF_ENQUEUE(&ifp->if_snd, m);
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if ((ifp->if_flags & IFF_OACTIVE) == 0)
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(*ifp->if_start)(ifp);
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splx(s);
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if (m->m_flags & M_MCAST)
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ifp->if_omcasts++;
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return (error);
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bad:
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if (m)
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m_freem(m);
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return (error);
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}
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/*
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* Process a received FDDI packet;
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* the packet is in the mbuf chain m without
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* the fddi header, which is provided separately.
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*/
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void
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fddi_input(ifp, fh, m)
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struct ifnet *ifp;
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register struct fddi_header *fh;
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struct mbuf *m;
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{
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register struct ifqueue *inq;
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register struct llc *l;
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int s;
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if ((ifp->if_flags & IFF_UP) == 0) {
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m_freem(m);
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return;
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}
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ifp->if_lastchange = time;
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ifp->if_ibytes += m->m_pkthdr.len + sizeof (*fh);
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if (bcmp((caddr_t)fddibroadcastaddr, (caddr_t)fh->fddi_dhost,
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sizeof(fddibroadcastaddr)) == 0)
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m->m_flags |= M_BCAST;
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else if (fh->fddi_dhost[0] & 1)
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m->m_flags |= M_MCAST;
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if (m->m_flags & (M_BCAST|M_MCAST))
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ifp->if_imcasts++;
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l = mtod(m, struct llc *);
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switch (l->llc_dsap) {
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#if defined(INET) || defined(NS) || defined(DECNET)
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case LLC_SNAP_LSAP:
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{
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unsigned fddi_type;
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if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP)
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goto dropanyway;
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if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0|| l->llc_snap.org_code[2] != 0)
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goto dropanyway;
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fddi_type = ntohs(l->llc_snap.ether_type);
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m_adj(m, 8);
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switch (fddi_type) {
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#ifdef INET
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case ETHERTYPE_IP:
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schednetisr(NETISR_IP);
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inq = &ipintrq;
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break;
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case ETHERTYPE_ARP:
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schednetisr(NETISR_ARP);
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inq = &arpintrq;
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break;
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#endif
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#ifdef NS
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case ETHERTYPE_NS:
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schednetisr(NETISR_NS);
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inq = &nsintrq;
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break;
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#endif
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#ifdef DECNET
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case ETHERTYPE_DECENT:
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schednetisr(NETISR_DECNET);
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inq = &decnetintrq;
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break;
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#endif
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default:
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printf("fddi_input: unknown protocol 0x%x\n", fddi_type);
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ifp->if_noproto++;
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goto dropanyway;
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}
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break;
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}
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#endif /* INET || NS */
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#ifdef ISO
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case LLC_ISO_LSAP:
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switch (l->llc_control) {
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case LLC_UI:
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/* LLC_UI_P forbidden in class 1 service */
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if ((l->llc_dsap == LLC_ISO_LSAP) &&
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(l->llc_ssap == LLC_ISO_LSAP)) {
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/* LSAP for ISO */
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m->m_data += 3; /* XXX */
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m->m_len -= 3; /* XXX */
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m->m_pkthdr.len -= 3; /* XXX */
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M_PREPEND(m, sizeof *fh, M_DONTWAIT);
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if (m == 0)
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return;
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*mtod(m, struct fddi_header *) = *fh;
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IFDEBUG(D_ETHER)
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printf("clnp packet");
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ENDDEBUG
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schednetisr(NETISR_ISO);
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inq = &clnlintrq;
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break;
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}
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goto dropanyway;
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case LLC_XID:
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case LLC_XID_P:
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if(m->m_len < 6)
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goto dropanyway;
|
|
l->llc_window = 0;
|
|
l->llc_fid = 9;
|
|
l->llc_class = 1;
|
|
l->llc_dsap = l->llc_ssap = 0;
|
|
/* Fall through to */
|
|
case LLC_TEST:
|
|
case LLC_TEST_P:
|
|
{
|
|
struct sockaddr sa;
|
|
register struct ether_header *eh2;
|
|
int i;
|
|
u_char c = l->llc_dsap;
|
|
|
|
l->llc_dsap = l->llc_ssap;
|
|
l->llc_ssap = c;
|
|
if (m->m_flags & (M_BCAST | M_MCAST))
|
|
bcopy((caddr_t)ac->ac_enaddr,
|
|
(caddr_t)eh->ether_dhost, 6);
|
|
sa.sa_family = AF_UNSPEC;
|
|
sa.sa_len = sizeof(sa);
|
|
eh2 = (struct ether_header *)sa.sa_data;
|
|
for (i = 0; i < 6; i++) {
|
|
eh2->ether_shost[i] = c = eh->fddi_dhost[i];
|
|
eh2->ether_dhost[i] =
|
|
eh->ether_dhost[i] = eh->fddi_shost[i];
|
|
eh2->ether_shost[i] = c;
|
|
}
|
|
eh2->ether_type = 0;
|
|
ifp->if_output(ifp, m, &sa, NULL);
|
|
return;
|
|
}
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
#endif /* ISO */
|
|
#ifdef LLC
|
|
case LLC_X25_LSAP:
|
|
{
|
|
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
|
|
if (m == 0)
|
|
return;
|
|
if ( !sdl_sethdrif(ifp, fh->fddi_shost, LLC_X25_LSAP,
|
|
fh->fddi_dhost, LLC_X25_LSAP, 6,
|
|
mtod(m, struct sdl_hdr *)))
|
|
panic("ETHER cons addr failure");
|
|
mtod(m, struct sdl_hdr *)->sdlhdr_len = m->m_pkthdr.len - sizeof(struct sdl_hdr);
|
|
#ifdef LLC_DEBUG
|
|
printf("llc packet\n");
|
|
#endif /* LLC_DEBUG */
|
|
schednetisr(NETISR_CCITT);
|
|
inq = &llcintrq;
|
|
break;
|
|
}
|
|
#endif /* LLC */
|
|
|
|
default:
|
|
printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap);
|
|
ifp->if_noproto++;
|
|
dropanyway:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
s = splimp();
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
} else
|
|
IF_ENQUEUE(inq, m);
|
|
splx(s);
|
|
}
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
fddi_ifattach(ifp)
|
|
register struct ifnet *ifp;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
register struct sockaddr_dl *sdl;
|
|
|
|
ifp->if_type = IFT_FDDI;
|
|
ifp->if_addrlen = 6;
|
|
ifp->if_hdrlen = 21;
|
|
ifp->if_mtu = FDDIMTU;
|
|
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
|
|
if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
|
|
sdl->sdl_family == AF_LINK) {
|
|
sdl->sdl_type = IFT_FDDI;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr,
|
|
LLADDR(sdl), ifp->if_addrlen);
|
|
break;
|
|
}
|
|
}
|