572 lines
15 KiB
C
572 lines
15 KiB
C
/*
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* Copyright (c) 1995, 1996
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* Matt Thomas <matt@3am-software.com>. All rights reserved.
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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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* $FreeBSD$
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*/
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#include "opt_atalk.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipx.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.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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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef INET6
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#include <netinet6/nd6.h>
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#endif
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#if defined(__FreeBSD__)
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#include <netinet/if_fddi.h>
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#else
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#include <net/if_fddi.h>
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#endif
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#ifdef IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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#endif
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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 NETATALK
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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extern u_char at_org_code[ 3 ];
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extern u_char aarp_org_code[ 3 ];
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#endif /* NETATALK */
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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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#if defined(__bsdi__) || defined(__NetBSD__)
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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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#elif defined(__FreeBSD__)
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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, m, dst, rt0)
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register struct ifnet *ifp;
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struct mbuf *m;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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u_int16_t type;
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int s, loop_copy = 0, error = 0, hdrcmplt = 0;
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u_char esrc[6], edst[6];
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register struct rtentry *rt;
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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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getmicrotime(&ifp->if_lastchange);
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#if !defined(__bsdi__) || _BSDI_VERSION >= 199401
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if ((rt = rt0) != NULL) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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if ((rt0 = rt = RTALLOC1(dst, 1)) != NULL)
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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_second < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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#endif
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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 !defined(__bsdi__) || _BSDI_VERSION >= 199401
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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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#else
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int usetrailers;
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if (!arpresolve(ac, m, &((struct sockaddr_in *)dst)->sin_addr, edst, &usetrailers))
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return (0); /* if not yet resolved */
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#endif
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type = htons(ETHERTYPE_IP);
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break;
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}
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#endif
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#ifdef INET6
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case AF_INET6:
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if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) {
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/* this must be impossible, so we bark */
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printf("nd6_storelladdr failed\n");
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return(0);
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}
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type = htons(ETHERTYPE_IPV6);
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break;
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#endif
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#ifdef IPX
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case AF_IPX:
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type = htons(ETHERTYPE_IPX);
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bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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break;
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#endif
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#ifdef NETATALK
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case AF_APPLETALK: {
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struct at_ifaddr *aa;
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
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return (0);
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/*
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* ifaddr is the first thing in at_ifaddr
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*/
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if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0)
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goto bad;
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/*
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* In the phase 2 case, we need to prepend an mbuf for the llc header.
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* Since we must preserve the value of m, which is passed to us by
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* value, we m_copy() the first mbuf, and use it for our llc header.
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*/
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if (aa->aa_flags & AFA_PHASE2) {
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struct llc llc;
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M_PREPEND(m, sizeof(struct llc), M_WAIT);
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if (m == 0)
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senderr(ENOBUFS);
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llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
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llc.llc_control = LLC_UI;
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bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
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llc.llc_snap_ether_type = htons(ETHERTYPE_AT);
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bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
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type = 0;
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} else {
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type = htons(ETHERTYPE_AT);
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}
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break;
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}
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#endif /* NETATALK */
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#ifdef NS
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case AF_NS:
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type = htons(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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break;
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#endif
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case pseudo_AF_HDRCMPLT:
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{
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struct ether_header *eh;
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hdrcmplt = 1;
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy((caddr_t)esrc, (caddr_t)eh->ether_shost, sizeof (esrc));
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/* FALLTHROUGH */
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}
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case AF_UNSPEC:
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{
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struct ether_header *eh;
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loop_copy = -1;
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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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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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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 (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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(void)memcpy((caddr_t) &l->llc_snap.ether_type, (caddr_t) &type,
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sizeof(u_int16_t));
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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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if (hdrcmplt)
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(void)memcpy((caddr_t)fh->fddi_shost, (caddr_t)esrc,
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sizeof(fh->fddi_shost));
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else
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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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/*
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* If a simplex interface, and the packet is being sent to our
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* Ethernet address or a broadcast address, loopback a copy.
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* XXX To make a simplex device behave exactly like a duplex
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* device, we should copy in the case of sending to our own
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* ethernet address (thus letting the original actually appear
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* on the wire). However, we don't do that here for security
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* reasons and compatibility with the original behavior.
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*/
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if ((ifp->if_flags & IFF_SIMPLEX) &&
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(loop_copy != -1)) {
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if ((m->m_flags & M_BCAST) || loop_copy) {
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struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
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(void) if_simloop(ifp,
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n, dst->sa_family, sizeof(struct fddi_header));
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} else if (bcmp(fh->fddi_dhost,
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fh->fddi_shost, sizeof(fh->fddi_shost)) == 0) {
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(void) if_simloop(ifp,
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m, dst->sa_family, sizeof(struct fddi_header));
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return(0); /* XXX */
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}
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}
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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 (m->m_flags & M_MCAST)
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ifp->if_omcasts++;
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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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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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getmicrotime(&ifp->if_lastchange);
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ifp->if_ibytes += m->m_pkthdr.len + sizeof (*fh);
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if (fh->fddi_dhost[0] & 1) {
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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
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m->m_flags |= M_MCAST;
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ifp->if_imcasts++;
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} else if ((ifp->if_flags & IFF_PROMISC)
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&& bcmp(((struct arpcom *)ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost,
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sizeof(fh->fddi_dhost)) != 0) {
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m_freem(m);
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return;
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}
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#ifdef M_LINK0
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/*
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* If this has a LLC priority of 0, then mark it so upper
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* layers have a hint that it really came via a FDDI/Ethernet
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* bridge.
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*/
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if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
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m->m_flags |= M_LINK0;
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#endif
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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(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
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case LLC_SNAP_LSAP:
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{
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u_int16_t 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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#ifdef NETATALK
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if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
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sizeof(at_org_code)) == 0 &&
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ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
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inq = &atintrq2;
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m_adj( m, sizeof( struct llc ));
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schednetisr(NETISR_ATALK);
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break;
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}
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if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
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sizeof(aarp_org_code)) == 0 &&
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ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
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m_adj( m, sizeof( struct llc ));
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aarpinput((struct arpcom *)ifp, m); /* XXX */
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return;
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}
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#endif /* NETATALK */
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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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type = ntohs(l->llc_snap.ether_type);
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m_adj(m, 8);
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switch (type) {
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#ifdef INET
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case ETHERTYPE_IP:
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if (ipflow_fastforward(m))
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return;
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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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#if !defined(__bsdi__) || _BSDI_VERSION >= 199401
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schednetisr(NETISR_ARP);
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inq = &arpintrq;
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break;
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#else
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arpinput((struct arpcom *)ifp, m);
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return;
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#endif
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#endif
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#ifdef INET6
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|
case ETHERTYPE_IPV6:
|
|
schednetisr(NETISR_IPV6);
|
|
inq = &ip6intrq;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case ETHERTYPE_IPX:
|
|
schednetisr(NETISR_IPX);
|
|
inq = &ipxintrq;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case ETHERTYPE_NS:
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
#endif
|
|
#ifdef DECNET
|
|
case ETHERTYPE_DECNET:
|
|
schednetisr(NETISR_DECNET);
|
|
inq = &decnetintrq;
|
|
break;
|
|
#endif
|
|
#ifdef NETATALK
|
|
case ETHERTYPE_AT:
|
|
schednetisr(NETISR_ATALK);
|
|
inq = &atintrq1;
|
|
break;
|
|
case ETHERTYPE_AARP:
|
|
/* probably this should be done with a NETISR as well */
|
|
aarpinput((struct arpcom *)ifp, m); /* XXX */
|
|
return;
|
|
#endif /* NETATALK */
|
|
default:
|
|
/* printf("fddi_input: unknown protocol 0x%x\n", type); */
|
|
ifp->if_noproto++;
|
|
goto dropanyway;
|
|
}
|
|
break;
|
|
}
|
|
#endif /* INET || NS */
|
|
|
|
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
|
|
*/
|
|
#ifdef __NetBSD__
|
|
#define ifa_next ifa_list.tqe_next
|
|
#endif
|
|
|
|
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;
|
|
ifp->if_baudrate = 100000000;
|
|
#ifdef IFF_NOTRAILERS
|
|
ifp->if_flags |= IFF_NOTRAILERS;
|
|
#endif
|
|
#if defined(__FreeBSD__)
|
|
ifa = ifnet_addrs[ifp->if_index - 1];
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
sdl->sdl_type = IFT_FDDI;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
|
|
#elif defined(__NetBSD__)
|
|
LIST_INIT(&((struct arpcom *)ifp)->ac_multiaddrs);
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa != NULL; ifa = ifa->ifa_list.tqe_next)
|
|
#else
|
|
for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next)
|
|
#endif
|
|
#if !defined(__FreeBSD__)
|
|
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;
|
|
}
|
|
#endif
|
|
}
|