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NetBSD/sys/net/if_fddisubr.c
kardel de4337ab21 merge FreeBSD timecounters from branch simonb-timecounters 
- struct timeval time is gone
  time.tv_sec -> time_second
- struct timeval mono_time is gone
  mono_time.tv_sec -> time_uptime
- access to time via
	{get,}{micro,nano,bin}time()
	get* versions are fast but less precise
- support NTP nanokernel implementation (NTP API 4)
- further reading:
  Timecounter Paper: http://phk.freebsd.dk/pubs/timecounter.pdf
  NTP Nanokernel: http://www.eecis.udel.edu/~mills/ntp/html/kern.html
2006-06-07 22:33:33 +00:00

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/* $NetBSD: if_fddisubr.c,v 1.62 2006/06/07 22:33:42 kardel Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1982, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if_fddisubr.c 8.1 (Berkeley) 6/10/93
*
* Id: if_fddisubr.c,v 1.15 1997/03/21 22:35:50 thomas Exp
*/
/*
* Copyright (c) 1995, 1996
* Matt Thomas <matt@3am-software.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of its contributor may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if_fddisubr.c 8.1 (Berkeley) 6/10/93
*
* Id: if_fddisubr.c,v 1.15 1997/03/21 22:35:50 thomas Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_fddisubr.c,v 1.62 2006/06/07 22:33:42 kardel Exp $");
#include "opt_inet.h"
#include "opt_atalk.h"
#include "opt_ccitt.h"
#include "opt_llc.h"
#include "opt_iso.h"
#include "opt_ns.h"
#include "opt_ipx.h"
#include "opt_mbuftrace.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <machine/cpu.h>
#include <net/if.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/if_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_inarp.h>
#include "opt_gateway.h"
#endif
#include <net/if_fddi.h>
#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif
#ifdef INET6
#ifndef INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#endif
#include <netinet6/nd6.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#include "carp.h"
#if NCARP > 0
#include <netinet/ip_carp.h>
#endif
#ifdef DECNET
#include <netdnet/dn.h>
#endif
#ifdef ISO
#include <netiso/argo_debug.h>
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#include <netiso/iso_snpac.h>
#endif
#ifdef LLC
#include <netccitt/dll.h>
#include <netccitt/llc_var.h>
#endif
#ifdef NETATALK
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#include <netatalk/at_extern.h>
#define llc_snap_org_code llc_un.type_snap.org_code
#define llc_snap_ether_type llc_un.type_snap.ether_type
extern u_char at_org_code[ 3 ];
extern u_char aarp_org_code[ 3 ];
#endif /* NETATALK */
#if defined(LLC) && defined(CCITT)
extern struct ifqueue pkintrq;
#endif
#include "bpfilter.h"
#define senderr(e) { error = (e); goto bad;}
/*
* This really should be defined in if_llc.h but in case it isn't.
*/
#ifndef llc_snap
#define llc_snap llc_un.type_snap
#endif
#define FDDIADDR(ifp) LLADDR((ifp)->if_sadl)
static int fddi_output(struct ifnet *, struct mbuf *,
struct sockaddr *, struct rtentry *);
static void fddi_input(struct ifnet *, struct mbuf *);
/*
* FDDI output routine.
* Encapsulate a packet of type family for the local net.
* Assumes that ifp is actually pointer to ethercom structure.
*/
static int
fddi_output(struct ifnet *ifp0, struct mbuf *m0, struct sockaddr *dst,
struct rtentry *rt0)
{
u_int16_t etype;
int error = 0, hdrcmplt = 0;
u_char esrc[6], edst[6];
struct mbuf *m = m0;
struct rtentry *rt;
struct fddi_header *fh;
struct mbuf *mcopy = (struct mbuf *)0;
struct ifnet *ifp = ifp0;
ALTQ_DECL(struct altq_pktattr pktattr;)
MCLAIM(m, ifp->if_mowner);
#if NCARP > 0
if (ifp->if_type == IFT_CARP) {
struct ifaddr *ifa;
/* loop back if this is going to the carp interface */
if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP &&
(ifa = ifa_ifwithaddr(dst)) != NULL &&
ifa->ifa_ifp == ifp0)
return (looutput(ifp0, m, dst, rt0));
ifp = ifp->if_carpdev;
/* ac = (struct arpcom *)ifp; */
if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) !=
(IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
}
#endif /* NCARP > 0 */
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
#if !defined(__bsdi__) || _BSDI_VERSION >= 199401
if ((rt = rt0) != NULL) {
if ((rt->rt_flags & RTF_UP) == 0) {
if ((rt0 = rt = rtalloc1(dst, 1)) != NULL)
rt->rt_refcnt--;
else
senderr(EHOSTUNREACH);
}
if (rt->rt_flags & RTF_GATEWAY) {
if (rt->rt_gwroute == 0)
goto lookup;
if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
rtfree(rt); rt = rt0;
lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1);
if ((rt = rt->rt_gwroute) == 0)
senderr(EHOSTUNREACH);
}
}
if (rt->rt_flags & RTF_REJECT)
if (rt->rt_rmx.rmx_expire == 0 ||
time_second < rt->rt_rmx.rmx_expire)
senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
}
#endif
/*
* If the queueing discipline needs packet classification,
* do it before prepending link headers.
*/
IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
switch (dst->sa_family) {
#ifdef INET
case AF_INET: {
#define SIN(x) ((struct sockaddr_in *)(x))
if (m->m_flags & M_BCAST)
memcpy(edst, fddibroadcastaddr, sizeof(edst));
else if (m->m_flags & M_MCAST) {
ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr,
(caddr_t)edst)
} else if (!arpresolve(ifp, rt, m, dst, edst))
return (0); /* if not yet resolved */
/* If broadcasting on a simplex interface, loopback a copy */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
mcopy = m_copy(m, 0, (int)M_COPYALL);
etype = htons(ETHERTYPE_IP);
break;
}
#endif
#ifdef INET6
case AF_INET6:
if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){
/* something bad happened */
return (0);
}
etype = htons(ETHERTYPE_IPV6);
break;
#endif
#ifdef AF_ARP
case AF_ARP: {
struct arphdr *ah = mtod(m, struct arphdr *);
if (m->m_flags & M_BCAST)
memcpy(edst, etherbroadcastaddr, sizeof(edst));
else {
caddr_t tha = ar_tha(ah);
KASSERT(tha);
memcpy(edst, tha, sizeof(edst));
}
ah->ar_hrd = htons(ARPHRD_ETHER);
switch (ntohs(ah->ar_op)) {
case ARPOP_REVREQUEST:
case ARPOP_REVREPLY:
etype = htons(ETHERTYPE_REVARP);
break;
case ARPOP_REQUEST:
case ARPOP_REPLY:
default:
etype = htons(ETHERTYPE_ARP);
}
break;
}
#endif /* AF_ARP */
#ifdef IPX
case AF_IPX:
etype = htons(ETHERTYPE_IPX);
memcpy(edst, &(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
sizeof (edst));
/* If broadcasting on a simplex interface, loopback a copy */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
mcopy = m_copy(m, 0, (int)M_COPYALL);
break;
#endif
#ifdef NETATALK
case AF_APPLETALK: {
struct at_ifaddr *aa;
if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) {
#ifdef NETATALKDEBUG
printf("aarpresolv: failed\n");
#endif
return (0);
}
/*
* ifaddr is the first thing in at_ifaddr
*/
if ((aa = (struct at_ifaddr *)at_ifawithnet(
(struct sockaddr_at *)dst, ifp)) == NULL)
goto bad;
/*
* In the phase 2 case, we need to prepend an mbuf for the llc
* header. Since we must preserve the value of m, which is
* passed to us by value, we m_copy() the first mbuf, and use
* it for our llc header.
*/
if (aa->aa_flags & AFA_PHASE2) {
struct llc llc;
M_PREPEND(m, sizeof(struct llc), M_NOWAIT);
if (m == 0)
senderr(ENOBUFS);
llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
llc.llc_control = LLC_UI;
memcpy(llc.llc_snap_org_code, at_org_code,
sizeof(at_org_code));
llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK);
memcpy(mtod(m, caddr_t), &llc, sizeof(struct llc));
etype = 0;
} else {
etype = htons(ETHERTYPE_ATALK);
}
break;
}
#endif /* NETATALK */
#ifdef NS
case AF_NS:
etype = htons(ETHERTYPE_NS);
memcpy(edst, &(((struct sockaddr_ns *)dst)->sns_addr.x_host),
sizeof (edst));
if (!memcmp(edst, &ns_thishost, sizeof(edst)))
return (looutput(ifp, m, dst, rt));
/* If broadcasting on a simplex interface, loopback a copy */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
mcopy = m_copy(m, 0, (int)M_COPYALL);
break;
#endif
#ifdef ISO
case AF_ISO: {
int snpalen;
struct llc *l;
struct sockaddr_dl *sdl;
if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
memcpy(edst, LLADDR(sdl), sizeof(edst));
} else if ((error =
iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
(char *)edst, &snpalen)) != 0)
goto bad; /* Not Resolved */
/* If broadcasting on a simplex interface, loopback a copy */
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
M_PREPEND(mcopy, sizeof (*fh), M_DONTWAIT);
if (mcopy) {
fh = mtod(mcopy, struct fddi_header *);
memcpy(fh->fddi_dhost, edst, sizeof (edst));
memcpy(fh->fddi_shost, FDDIADDR(ifp),
sizeof (edst));
}
}
M_PREPEND(m, 3, M_DONTWAIT);
if (m == NULL)
return (0);
etype = 0;
l = mtod(m, struct llc *);
l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
l->llc_control = LLC_UI;
} break;
#endif /* ISO */
#ifdef LLC
/* case AF_NSAP: */
case AF_CCITT: {
struct sockaddr_dl *sdl = rt ?
(struct sockaddr_dl *) rt->rt_gateway : NULL;
if (sdl && sdl->sdl_family == AF_LINK
&& sdl->sdl_alen > 0) {
memcpy(edst, LLADDR(sdl), sizeof(edst));
} else goto bad; /* Not a link interface ? Funny ... */
if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
M_PREPEND(mcopy, sizeof (*fh), M_DONTWAIT);
if (mcopy) {
fh = mtod(mcopy, struct fddi_header *);
memcpy(fh->fddi_dhost, edst, sizeof (edst));
memcpy(fh->fddi_shost, FDDIADDR(ifp),
sizeof (edst));
fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
}
}
etype = 0;
#ifdef LLC_DEBUG
{
int i;
struct llc *l = mtod(m, struct llc *);
printf("fddi_output: sending LLC2 pkt to: ");
for (i=0; i<6; i++)
printf("%x ", edst[i] & 0xff);
printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff,
l->llc_control & 0xff);
}
#endif /* LLC_DEBUG */
} break;
#endif /* LLC */
case pseudo_AF_HDRCMPLT:
{
struct fddi_header *fh1 = (struct fddi_header *)dst->sa_data;
hdrcmplt = 1;
memcpy(esrc, fh1->fddi_shost, sizeof (esrc));
/*FALLTHROUGH*/
}
case AF_LINK:
{
struct fddi_header *fh1 = (struct fddi_header *)dst->sa_data;
memcpy(edst, fh1->fddi_dhost, sizeof (edst));
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
etype = 0;
break;
}
case AF_UNSPEC:
{
struct ether_header *eh;
eh = (struct ether_header *)dst->sa_data;
memcpy(edst, eh->ether_dhost, sizeof (edst));
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
etype = eh->ether_type;
break;
}
#if NBPFILTER > 0
case AF_IMPLINK:
{
fh = mtod(m, struct fddi_header *);
error = EPROTONOSUPPORT;
switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
case FDDIFC_LLC_ASYNC: {
/* legal priorities are 0 through 7 */
if ((fh->fddi_fc & FDDIFC_Z) > 7)
goto bad;
break;
}
case FDDIFC_LLC_SYNC: {
/* FDDIFC_Z bits reserved, must be zero */
if (fh->fddi_fc & FDDIFC_Z)
goto bad;
break;
}
case FDDIFC_SMT: {
/* FDDIFC_Z bits must be non zero */
if ((fh->fddi_fc & FDDIFC_Z) == 0)
goto bad;
break;
}
default: {
/* anything else is too dangerous */
goto bad;
}
}
error = 0;
if (fh->fddi_dhost[0] & 1)
m->m_flags |= (M_BCAST|M_MCAST);
goto queue_it;
}
#endif
default:
printf("%s: can't handle af%d\n", ifp->if_xname,
dst->sa_family);
senderr(EAFNOSUPPORT);
}
if (mcopy)
(void) looutput(ifp, mcopy, dst, rt);
if (etype != 0) {
struct llc *l;
M_PREPEND(m, sizeof (struct llc), M_DONTWAIT);
if (m == 0)
senderr(ENOBUFS);
l = mtod(m, struct llc *);
l->llc_control = LLC_UI;
l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0;
memcpy(&l->llc_snap.ether_type, &etype, sizeof(u_int16_t));
}
/*
* Add local net header. If no space in first mbuf,
* allocate another.
*/
M_PREPEND(m, sizeof (struct fddi_header), M_DONTWAIT);
if (m == 0)
senderr(ENOBUFS);
fh = mtod(m, struct fddi_header *);
fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
memcpy(fh->fddi_dhost, edst, sizeof (edst));
#if NBPFILTER > 0
queue_it:
#endif
if (hdrcmplt)
memcpy(fh->fddi_shost, esrc, sizeof(fh->fddi_shost));
else
memcpy(fh->fddi_shost, FDDIADDR(ifp), sizeof(fh->fddi_shost));
#if NCARP > 0
if (ifp0 != ifp && ifp0->if_type == IFT_CARP)
memcpy(FDDIADDR(ifp0), fh->fddi_shost, sizeof(fh->fddi_shost));
if (ifp != ifp0)
ifp0->if_obytes += m->m_pkthdr.len;
#endif /* NCARP > 0 */
return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr));
bad:
if (m)
m_freem(m);
return (error);
}
/*
* Process a received FDDI packet;
* the packet is in the mbuf chain m with
* the fddi header.
*/
static void
fddi_input(struct ifnet *ifp, struct mbuf *m)
{
#if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
struct ifqueue *inq;
int s;
#endif
struct llc *l;
struct fddi_header *fh;
MCLAIM(m, &((struct ethercom *)ifp)->ec_rx_mowner);
if ((ifp->if_flags & IFF_UP) == 0) {
m_freem(m);
return;
}
fh = mtod(m, struct fddi_header *);
ifp->if_ibytes += m->m_pkthdr.len;
if (fh->fddi_dhost[0] & 1) {
if (memcmp(fddibroadcastaddr, fh->fddi_dhost,
sizeof(fddibroadcastaddr)) == 0)
m->m_flags |= M_BCAST;
else
m->m_flags |= M_MCAST;
ifp->if_imcasts++;
} else if ((ifp->if_flags & IFF_PROMISC)
&& memcmp(FDDIADDR(ifp), (caddr_t)fh->fddi_dhost,
sizeof(fh->fddi_dhost)) != 0) {
m_freem(m);
return;
}
#ifdef M_LINK0
/*
* If this has a LLC priority of 0, then mark it so upper
* layers have a hint that it really came via a FDDI/Ethernet
* bridge.
*/
if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
m->m_flags |= M_LINK0;
#endif
/* Strip off the FDDI header. */
m_adj(m, sizeof(struct fddi_header));
l = mtod(m, struct llc *);
switch (l->llc_dsap) {
#if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
case LLC_SNAP_LSAP:
{
u_int16_t etype;
if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP)
goto dropanyway;
#ifdef NETATALK
if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
sizeof(at_org_code)) == 0 &&
ntohs(l->llc_snap_ether_type) == ETHERTYPE_ATALK) {
inq = &atintrq2;
m_adj( m, sizeof( struct llc ));
schednetisr(NETISR_ATALK);
break;
}
if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
sizeof(aarp_org_code)) == 0 &&
ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
m_adj( m, sizeof( struct llc ));
aarpinput(ifp, m); /* XXX */
return;
}
#endif /* NETATALK */
if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0|| l->llc_snap.org_code[2] != 0)
goto dropanyway;
etype = ntohs(l->llc_snap.ether_type);
m_adj(m, 8);
#if NCARP > 0
if (ifp->if_carp && ifp->if_type != IFT_CARP &&
(carp_input(m, (u_int8_t *)&fh->fddi_shost,
(u_int8_t *)&fh->fddi_dhost, l->llc_snap.ether_type) == 0))
return;
#endif
switch (etype) {
#ifdef INET
case ETHERTYPE_IP:
#ifdef GATEWAY
if (ipflow_fastforward(m))
return;
#endif
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
case ETHERTYPE_ARP:
#if !defined(__bsdi__) || _BSDI_VERSION >= 199401
schednetisr(NETISR_ARP);
inq = &arpintrq;
break;
#else
arpinput(ifp, m);
return;
#endif
#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 INET6
case ETHERTYPE_IPV6:
schednetisr(NETISR_IPV6);
inq = &ip6intrq;
break;
#endif
#ifdef DECNET
case ETHERTYPE_DECNET:
schednetisr(NETISR_DECNET);
inq = &decnetintrq;
break;
#endif
#ifdef NETATALK
case ETHERTYPE_ATALK:
schednetisr(NETISR_ATALK);
inq = &atintrq1;
break;
case ETHERTYPE_AARP:
/* probably this should be done with a NETISR as well */
aarpinput(ifp, m); /* XXX */
return;
#endif /* NETATALK */
default:
ifp->if_noproto++;
goto dropanyway;
}
break;
}
#endif /* INET || NS */
#ifdef ISO
case LLC_ISO_LSAP:
switch (l->llc_control) {
case LLC_UI:
/* LLC_UI_P forbidden in class 1 service */
if ((l->llc_dsap == LLC_ISO_LSAP) &&
(l->llc_ssap == LLC_ISO_LSAP)) {
/* LSAP for ISO */
m->m_data += 3; /* XXX */
m->m_len -= 3; /* XXX */
m->m_pkthdr.len -= 3; /* XXX */
M_PREPEND(m, sizeof *fh, M_DONTWAIT);
if (m == 0)
return;
*mtod(m, struct fddi_header *) = *fh;
schednetisr(NETISR_ISO);
inq = &clnlintrq;
break;
}
goto dropanyway;
case LLC_XID:
case LLC_XID_P:
if(m->m_len < 6)
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 ether_header *eh;
int i;
u_char c = l->llc_dsap;
l->llc_dsap = l->llc_ssap;
l->llc_ssap = c;
eh = (struct ether_header *)sa.sa_data;
if (m->m_flags & (M_BCAST | M_MCAST))
memcpy(eh->ether_dhost, FDDIADDR(ifp), 6);
sa.sa_family = AF_UNSPEC;
sa.sa_len = sizeof(sa);
for (i = 0; i < 6; i++) {
eh->ether_shost[i] = fh->fddi_dhost[i];
eh->ether_dhost[i] = fh->fddi_shost[i];
}
eh->ether_type = 0;
ifp->if_output(ifp, m, &sa, NULL);
return;
}
default:
m_freem(m);
return;
}
break;
#endif /* ISO */
#ifdef LLC
case LLC_X25_LSAP:
{
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
if (m == 0)
return;
if ( !sdl_sethdrif(ifp, fh->fddi_shost, LLC_X25_LSAP,
fh->fddi_dhost, LLC_X25_LSAP, 6,
mtod(m, struct sdl_hdr *)))
panic("ETHER cons addr failure");
mtod(m, struct sdl_hdr *)->sdlhdr_len = m->m_pkthdr.len - sizeof(struct sdl_hdr);
#ifdef LLC_DEBUG
printf("llc packet\n");
#endif /* LLC_DEBUG */
schednetisr(NETISR_CCITT);
inq = &llcintrq;
break;
}
#endif /* LLC */
default:
ifp->if_noproto++;
#if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
dropanyway:
#endif
m_freem(m);
return;
}
#if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK)
s = splnet();
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m);
} else
IF_ENQUEUE(inq, m);
splx(s);
#endif
}
/*
* Perform common duties while attaching to interface list
*/
void
fddi_ifattach(struct ifnet *ifp, caddr_t lla)
{
struct ethercom *ec = (struct ethercom *)ifp;
ifp->if_type = IFT_FDDI;
ifp->if_addrlen = 6;
ifp->if_hdrlen = 21;
ifp->if_dlt = DLT_FDDI;
ifp->if_mtu = FDDIMTU;
ifp->if_output = fddi_output;
ifp->if_input = fddi_input;
ifp->if_baudrate = IF_Mbps(100);
#ifdef IFF_NOTRAILERS
ifp->if_flags |= IFF_NOTRAILERS;
#endif
/*
* Update the max_linkhdr
*/
if (ALIGN(ifp->if_hdrlen) > max_linkhdr)
max_linkhdr = ALIGN(ifp->if_hdrlen);
LIST_INIT(&ec->ec_multiaddrs);
if_alloc_sadl(ifp);
memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen);
ifp->if_broadcastaddr = fddibroadcastaddr;
#if NBPFILTER > 0
bpfattach(ifp, DLT_FDDI, sizeof(struct fddi_header));
#endif /* NBPFILTER > 0 */
#ifdef MBUFTRACE
strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname,
sizeof(ec->ec_tx_mowner.mo_name));
strlcpy(ec->ec_tx_mowner.mo_descr, "tx",
sizeof(ec->ec_tx_mowner.mo_descr));
strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname,
sizeof(ec->ec_rx_mowner.mo_name));
strlcpy(ec->ec_rx_mowner.mo_descr, "rx",
sizeof(ec->ec_rx_mowner.mo_descr));
MOWNER_ATTACH(&ec->ec_tx_mowner);
MOWNER_ATTACH(&ec->ec_rx_mowner);
ifp->if_mowner = &ec->ec_tx_mowner;
#endif
}
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