/*
* Copyright (c) 1995, 1996
* Matt Thomas <matt@3am-software.com>. All rights reserved.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
* $FreeBSD$
*/
#include "opt_atalk.h"
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipx.h"
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mac.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <net/if_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>
#include <net/fddi.h>
#if defined(INET) || defined(INET6)
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#endif
#ifdef INET6
#include <netinet6/nd6.h>
#endif
#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#ifdef DECNET
#include <netdnet/dn.h>
#endif
#ifdef NETATALK
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#include <netatalk/at_extern.h>
extern u_char at_org_code[ 3 ];
extern u_char aarp_org_code[ 3 ];
#endif /* NETATALK */
static u_char fddibroadcastaddr[FDDI_ADDR_LEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
static int fddi_resolvemulti(struct ifnet *, struct sockaddr **,
struct sockaddr *);
static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *,
struct rtentry *);
static void fddi_input(struct ifnet *ifp, struct mbuf *m);
#define IFP2AC(IFP) ((struct arpcom *)IFP)
#define senderr(e) { error = (e); goto bad; }
/*
* FDDI output routine.
* Encapsulate a packet of type family for the local net.
* Use trailer local net encapsulation if enough data in first
* packet leaves a multiple of 512 bytes of data in remainder.
* Assumes that ifp is actually pointer to arpcom structure.
*/
static int
fddi_output(ifp, m, dst, rt0)
struct ifnet *ifp;
struct mbuf *m;
struct sockaddr *dst;
struct rtentry *rt0;
{
u_int16_t type;
int loop_copy = 0, error = 0, hdrcmplt = 0;
u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN];
struct rtentry *rt;
struct fddi_header *fh;
struct arpcom *ac = IFP2AC(ifp);
#ifdef MAC
error = mac_check_ifnet_transmit(ifp, m);
if (error)
senderr(error);
#endif
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
getmicrotime(&ifp->if_lastchange);
if ((rt = rt0) != NULL) {
if ((rt->rt_flags & RTF_UP) == 0) {
if ((rt0 = rt = rtalloc1(dst, 1, 0UL)) != 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, 0UL);
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);
}
switch (dst->sa_family) {
#ifdef INET
case AF_INET: {
if (!arpresolve(ifp, rt, m, dst, edst, rt0))
return (0); /* if not yet resolved */
type = 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);
}
type = htons(ETHERTYPE_IPV6);
break;
#endif
#ifdef IPX
case AF_IPX:
type = htons(ETHERTYPE_IPX);
bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
(caddr_t)edst, FDDI_ADDR_LEN);
break;
#endif
#ifdef NETATALK
case AF_APPLETALK: {
struct at_ifaddr *aa;
if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
return (0);
/*
* ifaddr is the first thing in at_ifaddr
*/
if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0)
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, LLC_SNAPFRAMELEN, 0);
if (m == 0)
senderr(ENOBUFS);
llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
llc.llc_control = LLC_UI;
bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code));
llc.llc_snap.ether_type = htons(ETHERTYPE_AT);
bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
type = 0;
} else {
type = htons(ETHERTYPE_AT);
}
break;
}
#endif /* NETATALK */
#ifdef NS
case AF_NS:
type = htons(ETHERTYPE_NS);
bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
(caddr_t)edst, FDDI_ADDR_LEN);
break;
#endif
case pseudo_AF_HDRCMPLT:
{
struct ether_header *eh;
hdrcmplt = 1;
eh = (struct ether_header *)dst->sa_data;
bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN);
/* FALLTHROUGH */
}
case AF_UNSPEC:
{
struct ether_header *eh;
loop_copy = -1;
eh = (struct ether_header *)dst->sa_data;
bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN);
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
type = eh->ether_type;
break;
}
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;
}
default:
if_printf(ifp, "can't handle af%d\n", dst->sa_family);
senderr(EAFNOSUPPORT);
}
/*
* Add LLC header.
*/
if (type != 0) {
struct llc *l;
M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT);
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;
bcopy((caddr_t)&type, (caddr_t)&l->llc_snap.ether_type,
sizeof(u_int16_t));
}
/*
* Add local net header. If no space in first mbuf,
* allocate another.
*/
M_PREPEND(m, FDDI_HDR_LEN, M_NOWAIT);
if (m == 0)
senderr(ENOBUFS);
fh = mtod(m, struct fddi_header *);
fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN);
queue_it:
if (hdrcmplt)
bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
else
bcopy((caddr_t)ac->ac_enaddr, (caddr_t)fh->fddi_shost,
FDDI_ADDR_LEN);
/*
* If a simplex interface, and the packet is being sent to our
* Ethernet address or a broadcast address, loopback a copy.
* XXX To make a simplex device behave exactly like a duplex
* device, we should copy in the case of sending to our own
* ethernet address (thus letting the original actually appear
* on the wire). However, we don't do that here for security
* reasons and compatibility with the original behavior.
*/
if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
if ((m->m_flags & M_BCAST) || loop_copy) {
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
(void) if_simloop(ifp,
n, dst->sa_family, FDDI_HDR_LEN);
} else if (bcmp(fh->fddi_dhost,
fh->fddi_shost, FDDI_ADDR_LEN) == 0) {
(void) if_simloop(ifp,
m, dst->sa_family, FDDI_HDR_LEN);
return (0); /* XXX */
}
}
if (! IF_HANDOFF(&ifp->if_snd, m, ifp))
senderr(ENOBUFS);
return (error);
bad:
ifp->if_oerrors++;
if (m)
m_freem(m);
return (error);
}
/*
* Process a received FDDI packet;
* the packet is in the mbuf chain m without
* the fddi header, which is provided separately.
*/
static void
fddi_input(ifp, m)
struct ifnet *ifp;
struct mbuf *m;
{
struct ifqueue *inq;
struct llc *l;
struct fddi_header *fh;
fh = mtod(m, struct fddi_header *);
/*
* Update interface statistics.
*/
ifp->if_ibytes += m->m_pkthdr.len;
getmicrotime(&ifp->if_lastchange);
/*
* Discard packet if interface is not up.
*/
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
goto dropanyway;
#ifdef MAC
mac_create_mbuf_from_ifnet(ifp, m);
#endif
/*
* Discard non local unicast packets when interface
* is in promiscuous mode.
*/
if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
(bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost,
FDDI_ADDR_LEN) != 0))
goto dropanyway;
/*
* Set mbuf flags for bcast/mcast.
*/
if (fh->fddi_dhost[0] & 1) {
if (bcmp((caddr_t)ifp->if_broadcastaddr,
(caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN) == 0)
m->m_flags |= M_BCAST;
else
m->m_flags |= M_MCAST;
ifp->if_imcasts++;
}
#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 FDDI header. */
m_adj(m, sizeof(struct fddi_header));
m = m_pullup(m, sizeof(struct llc));
if (m == 0) {
ifp->if_ierrors++;
goto dropanyway;
}
l = mtod(m, struct llc *);
switch (l->llc_dsap) {
case LLC_SNAP_LSAP:
{
u_int16_t type;
if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) {
ifp->if_noproto++;
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_AT) {
inq = &atintrq2;
m_adj(m, LLC_SNAPFRAMELEN);
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, LLC_SNAPFRAMELEN);
aarpinput(IFP2AC(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) {
ifp->if_noproto++;
goto dropanyway;
}
type = ntohs(l->llc_snap.ether_type);
m_adj(m, LLC_SNAPFRAMELEN);
switch (type) {
#ifdef INET
case ETHERTYPE_IP:
if (ipflow_fastforward(m))
return;
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
case ETHERTYPE_ARP:
if (ifp->if_flags & IFF_NOARP)
goto dropanyway;
schednetisr(NETISR_ARP);
inq = &arpintrq;
break;
#endif
#ifdef INET6
case ETHERTYPE_IPV6:
schednetisr(NETISR_IPV6);
inq = &ip6intrq;
break;
#endif
#ifdef IPX
case ETHERTYPE_IPX:
schednetisr(NETISR_IPX);
inq = &ipxintrq;
break;
#endif
#ifdef NS
case ETHERTYPE_NS:
schednetisr(NETISR_NS);
inq = &nsintrq;
break;
#endif
#ifdef DECNET
case ETHERTYPE_DECNET:
schednetisr(NETISR_DECNET);
inq = &decnetintrq;
break;
#endif
#ifdef NETATALK
case ETHERTYPE_AT:
schednetisr(NETISR_ATALK);
inq = &atintrq1;
break;
case ETHERTYPE_AARP:
/* probably this should be done with a NETISR as well */
aarpinput(IFP2AC(ifp), m); /* XXX */
return;
#endif /* NETATALK */
default:
/* printf("fddi_input: unknown protocol 0x%x\n", type); */
ifp->if_noproto++;
goto dropanyway;
}
break;
}
default:
/* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
ifp->if_noproto++;
goto dropanyway;
}
(void) IF_HANDOFF(inq, m, NULL);
return;
dropanyway:
ifp->if_iqdrops++;
if (m)
m_freem(m);
return;
}
/*
* Perform common duties while attaching to interface list
*/
void
fddi_ifattach(ifp, bpf)
struct ifnet *ifp;
int bpf;
{
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
ifp->if_type = IFT_FDDI;
ifp->if_addrlen = FDDI_ADDR_LEN;
ifp->if_hdrlen = 21;
if_attach(ifp); /* Must be called before additional assignments */
ifp->if_mtu = FDDIMTU;
ifp->if_output = fddi_output;
ifp->if_input = fddi_input;
ifp->if_resolvemulti = fddi_resolvemulti;
ifp->if_broadcastaddr = fddibroadcastaddr;
ifp->if_baudrate = 100000000;
#ifdef IFF_NOTRAILERS
ifp->if_flags |= IFF_NOTRAILERS;
#endif
ifa = ifaddr_byindex(ifp->if_index);
if (ifa == NULL) {
printf("%s(): no lladdr for %s%d!\n", __FUNCTION__,
ifp->if_name, ifp->if_unit);
return;
}
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_FDDI;
sdl->sdl_alen = ifp->if_addrlen;
bcopy(IFP2AC(ifp)->ac_enaddr, 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;
int 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
#ifdef IPX
/*
* XXX - This code is probably wrong
*/
case AF_IPX: {
struct ipx_addr *ina;
struct arpcom *ac;
ina = &(IA_SIPX(ifa)->sipx_addr);
ac = IFP2AC(ifp);
if (ipx_nullhost(*ina)) {
ina->x_host = *(union ipx_host *)
ac->ac_enaddr;
} else {
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) ac->ac_enaddr,
sizeof(ac->ac_enaddr));
}
/*
* Set new address
*/
ifp->if_init(ifp->if_softc);
}
break;
#endif
default:
ifp->if_init(ifp->if_softc);
break;
}
case SIOCGIFADDR: {
struct sockaddr *sa;
sa = (struct sockaddr *) & ifr->ifr_data;
bcopy(IFP2AC(ifp)->ac_enaddr,
(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:
break;
}
return (error);
}
static int
fddi_resolvemulti(ifp, llsa, sa)
struct ifnet *ifp;
struct sockaddr **llsa;
struct sockaddr *sa;
{
struct sockaddr_dl *sdl;
struct sockaddr_in *sin;
#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 = 0;
return (0);
#ifdef INET
case AF_INET:
sin = (struct sockaddr_in *)sa;
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
return (EADDRNOTAVAIL);
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
0);
sdl->sdl_len = sizeof *sdl;
sdl->sdl_family = AF_LINK;
sdl->sdl_index = ifp->if_index;
sdl->sdl_type = 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 = 0;
return (0);
}
if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
return (EADDRNOTAVAIL);
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
0);
sdl->sdl_len = sizeof *sdl;
sdl->sdl_family = AF_LINK;
sdl->sdl_index = ifp->if_index;
sdl->sdl_type = 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);