571 lines
15 KiB
C
571 lines
15 KiB
C
/*
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* Copyright (c) 1998, Larry Lile
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* All rights reserved.
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*
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* For latest sources and information on this driver, please
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* go to http://anarchy.stdio.com.
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*
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* Questions, comments or suggestions should be directed to
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* Larry Lile <lile@stdio.com>.
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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 unmodified, this list of conditions, and the following
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*
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*/
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/*
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*
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* General ISO 802.5 (Token Ring) support routines
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*
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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 "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 <sys/sockio.h>
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#include <sys/sysctl.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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#include <net/if_arp.h>
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#include <net/iso88025.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 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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#include <net/bpf.h>
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#include <machine/md_var.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <net/iso88025.h>
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#define IFP2AC(IFP) ((struct arpcom *)IFP)
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void
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iso88025_ifattach(struct ifnet *ifp)
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{
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register struct ifaddr *ifa = NULL;
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register struct sockaddr_dl *sdl;
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ifp->if_type = IFT_ISO88025;
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ifp->if_addrlen = ISO88025_ADDR_LEN;
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ifp->if_hdrlen = ISO88025_HDR_LEN;
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if (ifp->if_baudrate == 0)
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ifp->if_baudrate = TR_16MBPS; /* 16Mbit should be a safe default */
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if (ifp->if_mtu == 0)
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ifp->if_mtu = ISO88025_DEFAULT_MTU;
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ifp->if_broadcastaddr = etherbroadcastaddr;
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ifa = ifaddr_byindex(ifp->if_index);
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if (ifa == 0) {
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printf("iso88025_ifattach: no lladdr!\n");
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return;
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}
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sdl = (struct sockaddr_dl *)ifa->ifa_addr;
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sdl->sdl_type = IFT_ISO88025;
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sdl->sdl_alen = ifp->if_addrlen;
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bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
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}
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/*
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* Perform common duties while detaching a Token Ring interface
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*/
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void
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iso88025_ifdetach(ifp, bpf)
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struct ifnet *ifp;
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int bpf;
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{
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if (bpf)
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bpfdetach(ifp);
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if_detach(ifp);
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}
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int
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iso88025_ioctl(struct ifnet *ifp, int command, caddr_t data)
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{
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struct ifaddr *ifa = (struct ifaddr *) data;
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struct ifreq *ifr = (struct ifreq *) data;
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int error = 0;
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switch (command) {
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case SIOCSIFADDR:
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ifp->if_flags |= IFF_UP;
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switch (ifa->ifa_addr->sa_family) {
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#ifdef INET
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case AF_INET:
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ifp->if_init(ifp->if_softc); /* before arpwhohas */
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arp_ifinit(ifp, ifa);
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break;
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#endif /* INET */
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#ifdef IPX
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/*
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* XXX - This code is probably wrong
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*/
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case AF_IPX:
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{
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register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
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struct arpcom *ac = IFP2AC(ifp);
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if (ipx_nullhost(*ina))
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ina->x_host =
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*(union ipx_host *)
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ac->ac_enaddr;
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else {
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bcopy((caddr_t) ina->x_host.c_host,
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(caddr_t) ac->ac_enaddr,
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sizeof(ac->ac_enaddr));
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}
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/*
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* Set new address
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*/
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ifp->if_init(ifp->if_softc);
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break;
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}
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#endif /* IPX */
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default:
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ifp->if_init(ifp->if_softc);
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break;
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}
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break;
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case SIOCGIFADDR:
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{
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struct sockaddr *sa;
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sa = (struct sockaddr *) & ifr->ifr_data;
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bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr,
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(caddr_t) sa->sa_data, ISO88025_ADDR_LEN);
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}
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break;
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case SIOCSIFMTU:
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/*
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* Set the interface MTU.
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*/
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if (ifr->ifr_mtu > ISO88025_MAX_MTU) {
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error = EINVAL;
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} else {
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ifp->if_mtu = ifr->ifr_mtu;
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}
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break;
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}
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return (error);
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}
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/*
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* ISO88025 encapsulation
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*/
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int
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iso88025_output(ifp, m, dst, rt0)
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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 snap_type = 0;
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int loop_copy = 0, error = 0, rif_len = 0;
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u_char edst[ISO88025_ADDR_LEN];
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struct iso88025_header *th;
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struct iso88025_header gen_th;
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struct sockaddr_dl *sdl = NULL;
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struct rtentry *rt;
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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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rt = rt0;
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if (rt != NULL) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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rt0 = rt = rtalloc1(dst, 1, 0UL);
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if (rt0)
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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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0UL);
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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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/* Calculate routing info length based on arp table entry */
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if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway))
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if (sdl->sdl_rcf != NULL)
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rif_len = TR_RCF_RIFLEN(sdl->sdl_rcf);
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/* Generate a generic 802.5 header for the packet */
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gen_th.ac = TR_AC;
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gen_th.fc = TR_LLC_FRAME;
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(void)memcpy((caddr_t)gen_th.iso88025_shost, (caddr_t)ac->ac_enaddr,
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sizeof(ac->ac_enaddr));
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if (rif_len) {
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gen_th.iso88025_shost[0] |= TR_RII;
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if (rif_len > 2) {
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gen_th.rcf = sdl->sdl_rcf;
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(void)memcpy((caddr_t)gen_th.rd,
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(caddr_t)sdl->sdl_route, rif_len - 2);
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}
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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(ifp, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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snap_type = ETHERTYPE_IP;
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break;
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#endif /* INET */
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#ifdef NOT_YET
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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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/* Something bad happened */
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return(0);
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}
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snap_type = ETHERTYPE_IPV6;
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break;
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#endif /* INET6 */
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#endif /* NOT_YET */
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#ifdef IPX
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case AF_IPX:
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{
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u_int8_t *cp;
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snap_type = 0;
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bcopy((caddr_t)&(satoipx_addr(dst).x_host), (caddr_t)edst,
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sizeof (edst));
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M_PREPEND(m, 3, M_TRYWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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m = m_pullup(m, 3);
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if (m == 0)
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senderr(ENOBUFS);
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cp = mtod(m, u_int8_t *);
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*cp++ = ETHERTYPE_IPX_8022;
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*cp++ = ETHERTYPE_IPX_8022;
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*cp++ = LLC_UI;
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}
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break;
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#endif /* IPX */
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case AF_UNSPEC:
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{
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struct iso88025_sockaddr_data *sd;
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/*
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* For AF_UNSPEC sockaddr.sa_data must contain all of the
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* mac information needed to send the packet. This allows
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* full mac, llc, and source routing function to be controlled.
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* llc and source routing information must already be in the
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* mbuf provided, ac/fc are set in sa_data. sockaddr.sa_data
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* should be a iso88025_sockaddr_data structure see iso88025.h
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*/
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loop_copy = -1;
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sd = (struct iso88025_sockaddr_data *)dst->sa_data;
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gen_th.ac = sd->ac;
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gen_th.fc = sd->fc;
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(void)memcpy((caddr_t)edst, (caddr_t)sd->ether_dhost,
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sizeof(sd->ether_dhost));
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(void)memcpy((caddr_t)gen_th.iso88025_shost,
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(caddr_t)sd->ether_shost, sizeof(sd->ether_shost));
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rif_len = 0;
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break;
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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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break;
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}
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if (snap_type != 0) {
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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_un.type_snap.ether_type = htons(snap_type);
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l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
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l->llc_un.type_snap.control = LLC_UI;
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l->llc_un.type_snap.org_code[0] =
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l->llc_un.type_snap.org_code[1] =
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l->llc_un.type_snap.org_code[2] = 0;
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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, ISO88025_HDR_LEN + rif_len, M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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(void)memcpy((caddr_t)&gen_th.iso88025_dhost, (caddr_t)edst,
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sizeof(edst));
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/* Copy as much of the generic header as is needed into the mbuf */
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th = mtod(m, struct iso88025_header *);
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memcpy(th, &gen_th, ISO88025_HDR_LEN + rif_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_copy(m, 0, (int)M_COPYALL);
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(void)if_simloop(ifp, n, dst->sa_family,
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ISO88025_HDR_LEN);
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} else
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if (bcmp(th->iso88025_dhost, th->iso88025_shost,
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ETHER_ADDR_LEN) == 0) {
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(void)if_simloop(ifp, m, dst->sa_family,
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ISO88025_HDR_LEN);
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return(0); /* XXX */
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}
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}
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if (! IF_HANDOFF_ADJ(&ifp->if_snd, m, ifp, ISO88025_HDR_LEN + (sizeof(struct llc))) ) {
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printf("iso88025_output: packet dropped QFULL.\n");
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senderr(ENOBUFS);
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}
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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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* ISO 88025 de-encapsulation
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*/
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void
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iso88025_input(ifp, th, m)
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struct ifnet *ifp;
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struct iso88025_header *th;
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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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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(*th);
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if (th->iso88025_dhost[0] & 1) {
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if (bcmp((caddr_t)etherbroadcastaddr,
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(caddr_t)th->iso88025_dhost,
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sizeof(etherbroadcastaddr)) == 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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}
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l = mtod(m, struct llc *);
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switch (l->llc_dsap) {
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#ifdef IPX
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case ETHERTYPE_IPX_8022: /* Thanks a bunch Novell */
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if ((l->llc_control != LLC_UI) ||
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(l->llc_ssap != ETHERTYPE_IPX_8022))
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goto dropanyway;
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th->iso88025_shost[0] &= ~(TR_RII);
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m_adj(m, 3);
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schednetisr(NETISR_IPX);
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inq = &ipxintrq;
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break;
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#endif /* IPX */
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case LLC_SNAP_LSAP: {
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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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goto dropanyway;
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if (l->llc_un.type_snap.org_code[0] != 0 ||
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l->llc_un.type_snap.org_code[1] != 0 ||
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l->llc_un.type_snap.org_code[2] != 0)
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goto dropanyway;
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type = ntohs(l->llc_un.type_snap.ether_type);
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m_adj(m, sizeof(struct llc));
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switch (type) {
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#ifdef INET
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case ETHERTYPE_IP:
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th->iso88025_shost[0] &= ~(TR_RII);
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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 (ifp->if_flags & IFF_NOARP)
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goto dropanyway;
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schednetisr(NETISR_ARP);
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inq = &arpintrq;
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break;
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#endif /* INET */
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#ifdef IPX_SNAP /* XXX: Not supported! */
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case ETHERTYPE_IPX:
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th->iso88025_shost[0] &= ~(TR_RII);
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schednetisr(NETISR_IPX);
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inq = &ipxintrq;
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break;
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#endif /* IPX_SNAP */
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#ifdef NOT_YET
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#ifdef INET6
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case ETHERTYPE_IPV6:
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th->iso88025_shost[0] &= ~(TR_RII);
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schednetisr(NETISR_IPV6);
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inq = &ip6intrq;
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break;
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#endif /* INET6 */
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#endif /* NOT_YET */
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default:
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printf("iso88025_input: unexpected llc_snap ether_type 0x%02x\n", type);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
case LLC_ISO_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
goto dropanyway;
|
|
break;
|
|
case LLC_XID:
|
|
case LLC_XID_P:
|
|
if(m->m_len < ISO88025_ADDR_LEN)
|
|
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;
|
|
struct arpcom *ac = (struct arpcom *)ifp;
|
|
struct iso88025_sockaddr_data *th2;
|
|
int i;
|
|
u_char c = l->llc_dsap;
|
|
|
|
if (th->iso88025_shost[0] & TR_RII) { /* XXX */
|
|
printf("iso88025_input: dropping source routed LLC_TEST\n");
|
|
m_free(m);
|
|
return;
|
|
}
|
|
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)th->iso88025_dhost,
|
|
ISO88025_ADDR_LEN);
|
|
sa.sa_family = AF_UNSPEC;
|
|
sa.sa_len = sizeof(sa);
|
|
th2 = (struct iso88025_sockaddr_data *)sa.sa_data;
|
|
for (i = 0; i < ISO88025_ADDR_LEN; i++) {
|
|
th2->ether_shost[i] = c = th->iso88025_dhost[i];
|
|
th2->ether_dhost[i] = th->iso88025_dhost[i] =
|
|
th->iso88025_shost[i];
|
|
th->iso88025_shost[i] = c;
|
|
}
|
|
th2->ac = TR_AC;
|
|
th2->fc = TR_LLC_FRAME;
|
|
ifp->if_output(ifp, m, &sa, NULL);
|
|
return;
|
|
}
|
|
default:
|
|
printf("iso88025_input: unexpected llc control 0x%02x\n", l->llc_control);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
printf("iso88025_input: unknown dsap 0x%x\n", l->llc_dsap);
|
|
ifp->if_noproto++;
|
|
dropanyway:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (! IF_HANDOFF(inq, m, NULL))
|
|
printf("iso88025_input: Packet dropped (Queue full).\n");
|
|
}
|