673 lines
15 KiB
C
673 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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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_inet.h"
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#include "opt_inet6.h"
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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/module.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/if_llc.h>
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#include <net/if_types.h>
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#include <net/if_llatbl.h>
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#include <net/ethernet.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/bpf.h>
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#include <net/fddi.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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#ifdef DECNET
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#include <netdnet/dn.h>
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#endif
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#include <security/mac/mac_framework.h>
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static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] =
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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static int fddi_resolvemulti(struct ifnet *, struct sockaddr **,
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struct sockaddr *);
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static int fddi_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
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struct route *);
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static void fddi_input(struct ifnet *ifp, struct mbuf *m);
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#define senderr(e) do { error = (e); goto bad; } while (0)
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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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*/
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static int
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fddi_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
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struct route *ro)
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{
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u_int16_t type;
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int loop_copy = 0, error = 0, hdrcmplt = 0;
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u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN];
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struct fddi_header *fh;
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#if defined(INET) || defined(INET6)
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int is_gw = 0;
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#endif
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#ifdef MAC
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error = mac_ifnet_check_transmit(ifp, m);
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if (error)
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senderr(error);
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#endif
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if (ifp->if_flags & IFF_MONITOR)
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senderr(ENETDOWN);
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if (!((ifp->if_flags & IFF_UP) &&
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(ifp->if_drv_flags & IFF_DRV_RUNNING)))
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senderr(ENETDOWN);
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getmicrotime(&ifp->if_lastchange);
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#if defined(INET) || defined(INET6)
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if (ro != NULL)
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is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
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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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error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL);
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if (error)
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return (error == EWOULDBLOCK ? 0 : error);
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type = htons(ETHERTYPE_IP);
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break;
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}
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case AF_ARP:
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{
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struct arphdr *ah;
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ah = mtod(m, struct arphdr *);
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ah->ar_hrd = htons(ARPHRD_ETHER);
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loop_copy = -1; /* if this is for us, don't do it */
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switch (ntohs(ah->ar_op)) {
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case ARPOP_REVREQUEST:
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case ARPOP_REVREPLY:
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type = htons(ETHERTYPE_REVARP);
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break;
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case ARPOP_REQUEST:
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case ARPOP_REPLY:
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default:
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type = htons(ETHERTYPE_ARP);
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break;
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}
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if (m->m_flags & M_BCAST)
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bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
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else
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bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
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}
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break;
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#endif /* INET */
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#ifdef INET6
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case AF_INET6:
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error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL);
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if (error)
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return (error == EWOULDBLOCK ? 0 : error);
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type = htons(ETHERTYPE_IPV6);
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break;
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#endif /* INET6 */
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case pseudo_AF_HDRCMPLT:
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{
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const struct ether_header *eh;
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hdrcmplt = 1;
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eh = (const struct ether_header *)dst->sa_data;
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bcopy(eh->ether_shost, esrc, FDDI_ADDR_LEN);
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/* FALLTHROUGH */
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}
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case AF_UNSPEC:
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{
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const struct ether_header *eh;
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loop_copy = -1;
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eh = (const struct ether_header *)dst->sa_data;
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bcopy(eh->ether_dhost, edst, FDDI_ADDR_LEN);
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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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if_printf(ifp, "can't handle af%d\n", dst->sa_family);
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senderr(EAFNOSUPPORT);
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}
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/*
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* Add LLC header.
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*/
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if (type != 0) {
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struct llc *l;
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M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT);
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if (m == NULL)
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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] =
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l->llc_snap.org_code[1] =
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l->llc_snap.org_code[2] = 0;
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l->llc_snap.ether_type = htons(type);
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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, FDDI_HDR_LEN, M_NOWAIT);
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if (m == NULL)
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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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bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN);
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queue_it:
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if (hdrcmplt)
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bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
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else
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bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
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FDDI_ADDR_LEN);
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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) && (loop_copy != -1)) {
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if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
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struct mbuf *n;
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n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
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(void) if_simloop(ifp, n, dst->sa_family,
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FDDI_HDR_LEN);
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} else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
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FDDI_ADDR_LEN) == 0) {
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(void) if_simloop(ifp, m, dst->sa_family,
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FDDI_HDR_LEN);
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return (0); /* XXX */
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}
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}
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error = (ifp->if_transmit)(ifp, m);
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if (error)
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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return (error);
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bad:
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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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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*/
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static void
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fddi_input(ifp, m)
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struct ifnet *ifp;
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struct mbuf *m;
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{
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int isr;
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struct llc *l;
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struct fddi_header *fh;
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/*
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* Do consistency checks to verify assumptions
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* made by code past this point.
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*/
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if ((m->m_flags & M_PKTHDR) == 0) {
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if_printf(ifp, "discard frame w/o packet header\n");
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if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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m_freem(m);
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return;
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}
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if (m->m_pkthdr.rcvif == NULL) {
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if_printf(ifp, "discard frame w/o interface pointer\n");
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if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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m_freem(m);
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return;
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}
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m = m_pullup(m, FDDI_HDR_LEN);
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if (m == NULL) {
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if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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goto dropanyway;
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}
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fh = mtod(m, struct fddi_header *);
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/*
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* Discard packet if interface is not up.
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*/
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if (!((ifp->if_flags & IFF_UP) &&
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(ifp->if_drv_flags & IFF_DRV_RUNNING)))
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goto dropanyway;
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/*
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* Give bpf a chance at the packet.
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*/
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BPF_MTAP(ifp, m);
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/*
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* Interface marked for monitoring; discard packet.
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*/
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if (ifp->if_flags & IFF_MONITOR) {
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m_freem(m);
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return;
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}
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#ifdef MAC
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mac_ifnet_create_mbuf(ifp, m);
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#endif
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/*
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* Update interface statistics.
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*/
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if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
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getmicrotime(&ifp->if_lastchange);
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/*
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* Discard non local unicast packets when interface
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* is in promiscuous mode.
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*/
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if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
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(bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost,
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FDDI_ADDR_LEN) != 0))
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goto dropanyway;
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/*
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* Set mbuf flags for bcast/mcast.
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*/
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if (fh->fddi_dhost[0] & 1) {
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if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
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FDDI_ADDR_LEN) == 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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if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
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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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/* Strip off FDDI header. */
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m_adj(m, FDDI_HDR_LEN);
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m = m_pullup(m, LLC_SNAPFRAMELEN);
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if (m == NULL) {
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if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
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goto dropanyway;
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}
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l = mtod(m, struct llc *);
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switch (l->llc_dsap) {
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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) ||
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(l->llc_ssap != LLC_SNAP_LSAP)) {
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if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1);
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goto dropanyway;
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}
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if (l->llc_snap.org_code[0] != 0 ||
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l->llc_snap.org_code[1] != 0 ||
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l->llc_snap.org_code[2] != 0) {
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if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1);
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goto dropanyway;
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}
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type = ntohs(l->llc_snap.ether_type);
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m_adj(m, LLC_SNAPFRAMELEN);
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switch (type) {
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#ifdef INET
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case ETHERTYPE_IP:
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isr = NETISR_IP;
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break;
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case ETHERTYPE_ARP:
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if (ifp->if_flags & IFF_NOARP)
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goto dropanyway;
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isr = NETISR_ARP;
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break;
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#endif
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#ifdef INET6
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case ETHERTYPE_IPV6:
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isr = NETISR_IPV6;
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break;
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#endif
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#ifdef DECNET
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case ETHERTYPE_DECNET:
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isr = NETISR_DECNET;
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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", type); */
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if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1);
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goto dropanyway;
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}
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break;
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}
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default:
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/* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
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if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1);
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goto dropanyway;
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}
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M_SETFIB(m, ifp->if_fib);
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netisr_dispatch(isr, m);
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return;
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dropanyway:
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if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
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if (m)
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m_freem(m);
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return;
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}
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/*
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* Perform common duties while attaching to interface list
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*/
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void
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fddi_ifattach(ifp, lla, bpf)
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struct ifnet *ifp;
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const u_int8_t *lla;
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int bpf;
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{
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struct ifaddr *ifa;
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struct sockaddr_dl *sdl;
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ifp->if_type = IFT_FDDI;
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ifp->if_addrlen = FDDI_ADDR_LEN;
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ifp->if_hdrlen = 21;
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if_attach(ifp); /* Must be called before additional assignments */
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ifp->if_mtu = FDDIMTU;
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ifp->if_output = fddi_output;
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ifp->if_input = fddi_input;
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ifp->if_resolvemulti = fddi_resolvemulti;
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ifp->if_broadcastaddr = fddibroadcastaddr;
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ifp->if_baudrate = 100000000;
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#ifdef IFF_NOTRAILERS
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|
ifp->if_flags |= IFF_NOTRAILERS;
|
|
#endif
|
|
ifa = ifp->if_addr;
|
|
KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
|
|
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
sdl->sdl_type = IFT_FDDI;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
|
|
|
|
if (bpf)
|
|
bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
fddi_ifdetach(ifp, bpf)
|
|
struct ifnet *ifp;
|
|
int bpf;
|
|
{
|
|
|
|
if (bpf)
|
|
bpfdetach(ifp);
|
|
|
|
if_detach(ifp);
|
|
|
|
return;
|
|
}
|
|
|
|
int
|
|
fddi_ioctl (ifp, command, data)
|
|
struct ifnet *ifp;
|
|
u_long command;
|
|
caddr_t data;
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct ifreq *ifr;
|
|
int error;
|
|
|
|
ifa = (struct ifaddr *) data;
|
|
ifr = (struct ifreq *) data;
|
|
error = 0;
|
|
|
|
switch (command) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET: /* before arpwhohas */
|
|
ifp->if_init(ifp->if_softc);
|
|
arp_ifinit(ifp, ifa);
|
|
break;
|
|
#endif
|
|
default:
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
break;
|
|
case SIOCGIFADDR: {
|
|
struct sockaddr *sa;
|
|
|
|
sa = (struct sockaddr *) & ifr->ifr_data;
|
|
bcopy(IF_LLADDR(ifp),
|
|
(caddr_t) sa->sa_data, FDDI_ADDR_LEN);
|
|
|
|
}
|
|
break;
|
|
case SIOCSIFMTU:
|
|
/*
|
|
* Set the interface MTU.
|
|
*/
|
|
if (ifr->ifr_mtu > FDDIMTU) {
|
|
error = EINVAL;
|
|
} else {
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
fddi_resolvemulti(ifp, llsa, sa)
|
|
struct ifnet *ifp;
|
|
struct sockaddr **llsa;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
#ifdef INET
|
|
struct sockaddr_in *sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
u_char *e_addr;
|
|
|
|
switch(sa->sa_family) {
|
|
case AF_LINK:
|
|
/*
|
|
* No mapping needed. Just check that it's a valid MC address.
|
|
*/
|
|
sdl = (struct sockaddr_dl *)sa;
|
|
e_addr = LLADDR(sdl);
|
|
if ((e_addr[0] & 1) != 1)
|
|
return (EADDRNOTAVAIL);
|
|
*llsa = NULL;
|
|
return (0);
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
|
|
return (EADDRNOTAVAIL);
|
|
sdl = link_init_sdl(ifp, *llsa, IFT_FDDI);
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = FDDI_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return (0);
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/*
|
|
* An IP6 address of 0 means listen to all
|
|
* of the Ethernet multicast address used for IP6.
|
|
* (This is used for multicast routers.)
|
|
*/
|
|
ifp->if_flags |= IFF_ALLMULTI;
|
|
*llsa = NULL;
|
|
return (0);
|
|
}
|
|
if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
|
|
return (EADDRNOTAVAIL);
|
|
sdl = link_init_sdl(ifp, *llsa, IFT_FDDI);
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = FDDI_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return (0);
|
|
#endif
|
|
|
|
default:
|
|
/*
|
|
* Well, the text isn't quite right, but it's the name
|
|
* that counts...
|
|
*/
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static moduledata_t fddi_mod = {
|
|
"fddi", /* module name */
|
|
NULL, /* event handler */
|
|
0 /* extra data */
|
|
};
|
|
|
|
DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
|
|
MODULE_VERSION(fddi, 1);
|