Source to bsd/net/if_ethersubr.c
/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
* Reserved. This file contains Original Code and/or Modifications of
* Original Code as defined in and that are subject to the Apple Public
* Source License Version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. Please obtain a copy of the
* License at http://www.apple.com/publicsource and read it before using
* this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License."
*
* @APPLE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1997, 1998 Apple Computer, Inc. All Rights Reserved */
/* Copyright (c) 1995 NeXT Computer, Inc. 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.
*
* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
*/
#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 INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#endif
#include <netinet/if_ether.h>
#if NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if ISO
#include <netiso/argo_debug.h>
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#include <netiso/iso_snpac.h>
#endif
#if LLC
#include <netccitt/dll.h>
#include <netccitt/llc_var.h>
#endif
#if defined(ppc)
#include <sys/socketvar.h>
#include <net/if_blue.h>
struct BlueFilter RhapFilter[BFCount];
int BFIx; /* 0 for Atalk; 1..9 for IP */
#endif /* ppc */
#include <net/ndrv.h>
#if defined(LLC) && defined(CCITT)
extern struct ifqueue pkintrq;
#endif
#include <h/at_pat.h>
#if NETAT
extern struct ifqueue atalkintrq;
#endif
#include <machine/spl.h>
u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
extern struct ifnet loif;
#define senderr(e) { error = (e); goto bad;}
/*
* Ethernet 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.
*/
int
ether_output(ifp, m0, dst, rt0)
register struct ifnet *ifp;
struct mbuf *m0;
struct sockaddr *dst;
struct rtentry *rt0;
{
u_int16_t etype;
int s, error = 0;
u_char edst[6];
register struct mbuf *m = m0;
register struct rtentry *rt;
struct mbuf *mcopy = (struct mbuf *)0;
register struct ether_header *eh;
int off, len = m->m_pkthdr.len;
struct arpcom *ac = (struct arpcom *)ifp;
int ismulticast = 0;
extern void kprintf( const char *, ...);
extern struct mbuf *splitter_input(struct mbuf *, struct ifnet *);
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
ifp->if_lastchange = time;
if ((rt = rt0)) {
if ((rt->rt_flags & RTF_UP) == 0) {
if ((rt0 = rt = rtalloc1(dst, 1)))
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.tv_sec < rt->rt_rmx.rmx_expire)
senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
}
switch (dst->sa_family) {
#if INET
case AF_INET:
if (!arpresolve(ac, 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);
off = m->m_pkthdr.len - m->m_len;
etype = ETHERTYPE_IP;
break;
#endif
#if NS
case AF_NS:
etype = ETHERTYPE_NS;
bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
(caddr_t)edst, sizeof (edst));
if (!bcmp((caddr_t)edst, (caddr_t)&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
#if ISO
case AF_ISO: {
int snpalen;
struct llc *l;
register struct sockaddr_dl *sdl;
if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
} else if (error =
iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
(char *)edst, &snpalen))
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 (*eh), M_DONTWAIT);
if (mcopy) {
eh = mtod(mcopy, struct ether_header *);
bcopy((caddr_t)edst,
(caddr_t)eh->ether_dhost, sizeof (edst));
bcopy((caddr_t)ac->ac_enaddr,
(caddr_t)eh->ether_shost, sizeof (edst));
}
}
M_PREPEND(m, 3, M_DONTWAIT);
if (m == NULL)
return (0);
etype = m->m_pkthdr.len;
l = mtod(m, struct llc *);
l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
l->llc_control = LLC_UI;
len += 3;
IFDEBUG(D_ETHER)
int i;
printf("unoutput: sending pkt to: ");
for (i=0; i<6; i++)
printf("%x ", edst[i] & 0xff);
printf("\n");
ENDDEBUG
} break;
#endif /* ISO */
#if LLC
/* case AF_NSAP: */
case AF_CCITT: {
register struct sockaddr_dl *sdl =
(struct sockaddr_dl *) rt -> rt_gateway;
if (sdl && sdl->sdl_family == AF_LINK
&& sdl->sdl_alen > 0) {
bcopy(LLADDR(sdl), (char *)edst,
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 (*eh), M_DONTWAIT);
if (mcopy) {
eh = mtod(mcopy, struct ether_header *);
bcopy((caddr_t)edst,
(caddr_t)eh->ether_dhost, sizeof (edst));
bcopy((caddr_t)ac->ac_enaddr,
(caddr_t)eh->ether_shost, sizeof (edst));
}
}
etype = m->m_pkthdr.len;
#if LLC_DEBUG
{
int i;
register struct llc *l = mtod(m, struct llc *);
printf("ether_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",
etype & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
l->llc_control & 0xff);
}
#endif /* LLC_DEBUG */
} break;
#endif /* LLC */
case AF_UNSPEC:
eh = (struct ether_header *)dst->sa_data;
bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst));
/* AF_UNSPEC doesn't swap the byte order of the ether_type. */
etype = ntohs(eh->ether_type);
break;
#if NETAT
case AF_APPLETALK:
{
#ifdef APPLETALK_DEBUG
int i;
register struct llc *l = mtod(m, struct llc *);
#endif
eh = (struct ether_header *)dst->sa_data;
bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst));
etype = m->m_pkthdr.len;
#ifdef APPLETALK_DEBUG
kprintf("ether_output: sending AppleTalk pkt to: ");
for (i=0; i<6; i++)
kprintf("%x ", edst[i] & 0xff);
kprintf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
etype & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
l->llc_control & 0xff);
#endif /* APPLETALK_DEBUG */
}
break;
#endif /* NETAT */
default:
#if 0
kprintf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
dst->sa_family);
#endif
senderr(EAFNOSUPPORT);
}
if (mcopy)
(void) looutput(ifp, mcopy, dst, rt);
/*
* Add local net header. If no space in first mbuf,
* allocate another.
*/
M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
if (m == 0)
senderr(ENOBUFS);
eh = mtod(m, struct ether_header *);
etype = htons(etype);
bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type,
sizeof(eh->ether_type));
bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst));
bcopy((caddr_t)ac->ac_enaddr, (caddr_t)eh->ether_shost,
sizeof(eh->ether_shost));
ismulticast = (m->m_flags & M_MCAST);
#if defined(ppc)
/*
* We're already to send. Let's check for the blue box...
*/
if (ifp->if_flags&IFF_SPLITTER)
{ m->m_flags |= 0x10;
if ((m = splitter_input(m, ifp)) == NULL)
return(0);
}
#endif /* ppc */
s = splimp();
/*
* Queue message on interface, and start output if interface
* not yet active.
*/
if (IF_QFULL(&ifp->if_snd)) {
IF_DROP(&ifp->if_snd);
splx(s);
senderr(ENOBUFS);
}
IF_ENQUEUE(&ifp->if_snd, m);
/* if ((ifp->if_flags & IFF_OACTIVE) == 0) */
(*ifp->if_start)(ifp);
splx(s);
ifp->if_obytes += len + sizeof (struct ether_header);
if (ismulticast)
ifp->if_omcasts++;
return (error);
bad:
if (m)
m_freem(m);
return (error);
}
/*
* Process a received Ethernet packet;
* the packet is in the mbuf chain m without
* the ether header, which is provided separately.
*/
void
ether_input(ifp, eh, m)
struct ifnet *ifp;
register struct ether_header *eh;
struct mbuf *m;
{
register struct ifqueue *inq;
register struct llc *l;
u_int16_t etype;
int s;
extern void revarpinput(struct mbuf *);
u_int16_t ptype;
#if defined(ppc)
extern struct ifnet_blue *blue_if;
extern struct mbuf *splitter_input(struct mbuf *, struct ifnet *);
/*
* Y-adapter input processing:
* - Don't split if coming from a dummy if
* - If coming from a real if, if splitting enabled,
* then filter the incoming packet
*/
if (ifp != (struct ifnet *)blue_if)
{ /* Is splitter turned on? */
if (ifp->if_flags&IFF_SPLITTER)
{ m->m_data -= sizeof(struct ether_header);
m->m_len += sizeof (struct ether_header);
m->m_pkthdr.len += sizeof(struct ether_header);
/*
* Check to see if destined for BlueBox or Rhapsody
* If NULL return, mbuf's been consumed by the BlueBox.
* Otherwise, send on to Rhapsody
*/
if ((m = splitter_input(m, ifp)) == NULL)
return;
m->m_data += sizeof(struct ether_header);
m->m_len -= sizeof (struct ether_header);
m->m_pkthdr.len -= sizeof(struct ether_header);
}
} else
{ /* Get the "real" IF */
ifp = ((struct ndrv_cb *)(blue_if->ifb_so->so_pcb))->nd_if;
m->m_pkthdr.rcvif = ifp;
blue_if->pkts_looped_b2r++;
}
#endif /* ppc */
if ((ifp->if_flags & IFF_UP) == 0) {
m_freem(m);
return;
}
#if defined(ppc)
/*
* Here, we're working on the "real" i/f
*/
#endif
ifp->if_lastchange = time;
ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
if (eh->ether_dhost[0] & 1) {
if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
sizeof(etherbroadcastaddr)) == 0)
m->m_flags |= M_BCAST;
else
m->m_flags |= M_MCAST;
}
if (m->m_flags & (M_BCAST|M_MCAST))
ifp->if_imcasts++;
etype = ntohs(eh->ether_type);
ptype = -1;
switch (etype) {
#if INET
case ETHERTYPE_IP:
#if defined(ppc)
ptype = mtod(m, struct ip *)->ip_p;
if (((ifp->if_eflags & IFEF_DVR_REENTRY_OK) == 0) ||
(ptype != IPPROTO_TCP && ptype != IPPROTO_UDP))
#endif
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
case ETHERTYPE_ARP:
schednetisr(NETISR_ARP);
inq = &arpintrq;
break;
case ETHERTYPE_REVARP:
revarpinput(m); /* XXX queue? */
return;
#endif /* INET */
#if NS
case ETHERTYPE_NS:
schednetisr(NETISR_NS);
inq = &nsintrq;
break;
#endif /* NS */
default:
#if defined (ISO) || defined (LLC) || NETAT
if (etype > ETHERMTU)
goto dropanyway;
l = mtod(m, struct llc *);
/* Temporary hack: check for AppleTalk and AARP packets */
/* WARNING we're checking only on the "ether_type" (the 2 bytes
* of the SNAP header. This shouldn't be a big deal,
* AppleTalk pat_input is making sure we have the right packets
* because it needs to discrimante AARP from EtherTalk packets.
*/
if (l->llc_dsap == LLC_SNAP_LSAP &&
l->llc_ssap == LLC_SNAP_LSAP &&
l->llc_un.type_snap.control == 0x03) {
#if NETAT
#ifdef APPLETALK_DEBUG
printf("ether_input: SNAP Cntrol type=0x%x Src=%s\n",
l->llc_un.type_snap.ether_type,
ether_sprintf(&eh->ether_shost));
printf(" Dst=%s\n",
ether_sprintf(&eh->ether_dhost));
#endif /* APPLETALK_DEBUG */
#endif /* NETAT */
if ((l->llc_un.type_snap.ether_type == 0x809B) ||
(l->llc_un.type_snap.ether_type == 0x80F3)) {
#if NETAT
/*
* note: for AppleTalk we need to pass the enet header of the
* packet up stack. To do so, we made sure in that the FULL packet
* is copied in the mbuf by the mace driver, and only the m_data and
* length have been shifted to make IP and the other guys happy.
*/
m->m_data -= sizeof(*eh);
m->m_len += sizeof(*eh);
m->m_pkthdr.len += sizeof(*eh);
#ifdef APPLETALK_DEBUG
l == (struct llc *)(eh+1);
if (l->llc_un.type_snap.ether_type == 0x80F3) {
kprintf("ether_input: RCV AppleTalk type=0x%x Src=%s\n",
l->llc_un.type_snap.ether_type,
ether_sprintf(&eh->ether_shost));
kprintf(" Dst=%s\n",
ether_sprintf(&eh->ether_dhost));
}
#endif /* APPLETALK_DEBUG */
schednetisr(NETISR_APPLETALK);
inq = &atalkintrq ;
#else /* no APPLETALK */
goto dropanyway;
#endif /* NETAT */
break;
}
}
switch (l->llc_dsap) {
#if 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 */
if (m->m_pkthdr.len > etype)
m_adj(m, etype - m->m_pkthdr.len);
m->m_data += 3; /* XXX */
m->m_len -= 3; /* XXX */
m->m_pkthdr.len -= 3; /* XXX */
M_PREPEND(m, sizeof *eh, M_DONTWAIT);
if (m == 0)
return;
*mtod(m, struct ether_header *) = *eh;
IFDEBUG(D_ETHER)
printf("clnp packet");
ENDDEBUG
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;
register struct ether_header *eh2;
int i;
u_char c = l->llc_dsap;
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)eh->ether_dhost, 6);
sa.sa_family = AF_UNSPEC;
sa.sa_len = sizeof(sa);
eh2 = (struct ether_header *)sa.sa_data;
for (i = 0; i < 6; i++) {
eh2->ether_shost[i] = c = eh->ether_dhost[i];
eh2->ether_dhost[i] =
eh->ether_dhost[i] = eh->ether_shost[i];
eh->ether_shost[i] = c;
}
ifp->if_output(ifp, m, &sa, NULL);
return;
}
default:
m_freem(m);
return;
}
break;
#endif /* ISO */
#if LLC
case LLC_X25_LSAP:
{
if (m->m_pkthdr.len > etype)
m_adj(m, etype - m->m_pkthdr.len);
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
if (m == 0)
return;
if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP,
eh->ether_dhost, LLC_X25_LSAP, 6,
mtod(m, struct sdl_hdr *)))
panic("ETHER cons addr failure");
mtod(m, struct sdl_hdr *)->sdlhdr_len = etype;
#if LLC_DEBUG
printf("llc packet\n");
#endif /* LLC_DEBUG */
schednetisr(NETISR_CCITT);
inq = &llcintrq;
break;
}
#endif /* LLC */
dropanyway:
default:
m_freem(m);
return;
}
#else /* ISO || LLC */
m_freem(m);
return;
#endif /* ISO || LLC */
}
s = splimp();
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m);
} else
IF_ENQUEUE(inq, m);
splx(s);
if ((ifp->if_eflags & IFEF_DVR_REENTRY_OK) && (ptype == IPPROTO_TCP || ptype == IPPROTO_UDP)) {
extern void ipintr(void);
s = splnet();
ipintr();
splx(s);
}
}
/*
* Convert Ethernet address to printable (loggable) representation.
*/
static char digits[] = "0123456789abcdef";
char *
ether_sprintf(ap)
register u_char *ap;
{
register i;
static char etherbuf[18];
register char *cp = etherbuf;
for (i = 0; i < 6; i++) {
*cp++ = digits[*ap >> 4];
*cp++ = digits[*ap++ & 0xf];
*cp++ = ':';
}
*--cp = 0;
return (etherbuf);
}
/*
* Perform common duties while attaching to interface list
*/
void
ether_ifattach(ifp)
register struct ifnet *ifp;
{
register struct ifaddr *ifa;
register struct sockaddr_dl *sdl;
extern appletalk_hack_start(struct ifnet *);
ifp->if_type = IFT_ETHER;
ifp->if_addrlen = 6;
ifp->if_hdrlen = 14;
ifp->if_mtu = ETHERMTU;
ifp->if_output = ether_output;
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
sdl->sdl_family == AF_LINK) {
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ifp->if_addrlen;
bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr,
LLADDR(sdl), ifp->if_addrlen);
break;
}
}
#if NETAT
/*
* BIG HACK ALERT ### LD 06/02/97
* This is a way to get the appletalk stack inited. JUST A TEMPO Hack
*/
appletalk_hack_start(ifp);
#endif /* NETAT */
}
u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
/*
* Add an Ethernet multicast address or range of addresses to the list for a
* given interface.
*/
int
ether_addmulti(ifr, ac)
struct ifreq *ifr;
register struct arpcom *ac;
{
register struct ether_multi *enm;
struct sockaddr_in *sin;
u_char addrlo[6];
u_char addrhi[6];
int s = splimp();
switch (ifr->ifr_addr.sa_family) {
case AF_UNSPEC:
bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
bcopy(addrlo, addrhi, 6);
break;
#if INET
case AF_INET:
sin = (struct sockaddr_in *)&(ifr->ifr_addr);
if (sin->sin_addr.s_addr == INADDR_ANY) {
/*
* An IP address of INADDR_ANY means listen to all
* of the Ethernet multicast addresses used for IP.
* (This is for the sake of IP multicast routers.)
*/
bcopy(ether_ipmulticast_min, addrlo, 6);
bcopy(ether_ipmulticast_max, addrhi, 6);
}
else {
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
bcopy(addrlo, addrhi, 6);
}
break;
#endif
default:
splx(s);
return (EAFNOSUPPORT);
}
/*
* Verify that we have valid Ethernet multicast addresses.
*/
if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) {
splx(s);
return (EINVAL);
}
/*
* See if the address range is already in the list.
*/
ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
if (enm != NULL) {
/*
* Found it; just increment the reference count.
*/
++enm->enm_refcount;
splx(s);
return (0);
}
/*
* New address or range; malloc a new multicast record
* and link it into the interface's multicast list.
*/
enm = (struct ether_multi *)_MALLOC(sizeof(*enm), M_IFMADDR, M_WAITOK);
if (enm == NULL) {
splx(s);
return (ENOBUFS);
}
bcopy(addrlo, enm->enm_addrlo, 6);
bcopy(addrhi, enm->enm_addrhi, 6);
enm->enm_ac = ac;
enm->enm_refcount = 1;
enm->enm_next = ac->ac_multiaddrs;
ac->ac_multiaddrs = enm;
ac->ac_multicnt++;
splx(s);
/*
* Return ENETRESET to inform the driver that the list has changed
* and its reception filter should be adjusted accordingly.
*/
return (ENETRESET);
}
/*
* Delete a multicast address record.
*/
int
ether_delmulti(ifr, ac, ret_mca)
struct ifreq *ifr;
register struct arpcom *ac;
struct ether_addr * ret_mca;
{
register struct ether_multi *enm;
register struct ether_multi **p;
struct sockaddr_in *sin;
u_char addrlo[6];
u_char addrhi[6];
int s = splimp();
switch (ifr->ifr_addr.sa_family) {
case AF_UNSPEC:
bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
bcopy(addrlo, addrhi, 6);
break;
#if INET
case AF_INET:
sin = (struct sockaddr_in *)&(ifr->ifr_addr);
if (sin->sin_addr.s_addr == INADDR_ANY) {
/*
* An IP address of INADDR_ANY means stop listening
* to the range of Ethernet multicast addresses used
* for IP.
*/
bcopy(ether_ipmulticast_min, addrlo, 6);
bcopy(ether_ipmulticast_max, addrhi, 6);
}
else {
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
bcopy(addrlo, addrhi, 6);
}
break;
#endif
default:
splx(s);
return (EAFNOSUPPORT);
}
/*
* Look up the address in our list.
*/
ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
if (enm == NULL) {
splx(s);
return (ENXIO);
}
if (--enm->enm_refcount != 0) {
/*
* Still some claims to this record.
*/
splx(s);
return (0);
}
/* save the low and high address of the range before deletion */
if (ret_mca) {
*ret_mca = *((struct ether_addr *)addrlo);
*(ret_mca + 1) = *((struct ether_addr *)addrhi);
}
/*
* No remaining claims to this record; unlink and free it.
*/
for (p = &enm->enm_ac->ac_multiaddrs;
*p != enm;
p = &(*p)->enm_next)
continue;
*p = (*p)->enm_next;
_FREE(enm, M_IFMADDR);
ac->ac_multicnt--;
splx(s);
/*
* Return ENETRESET to inform the driver that the list has changed
* and its reception filter should be adjusted accordingly.
*/
return (ENETRESET);
}
#ifdef sparc
localetheraddr(hint, result)
struct ether_addr *hint, *result;
{
static int found = 0;
static struct ether_addr addr;
if (!found) {
found = 1;
if (hint == NULL)
return (0);
addr = *hint;
printf("Ethernet address = %s\n", ether_sprintf(&addr) );
}
if (result != NULL)
*result = addr;
return (1);
}
#endif
#if defined(ppc)
/*
* NB: need to register Atalk addresses from Rhapsody
*/
int
if_register(register struct BlueFilter *f
#ifdef BF_if
,
register struct ifnet *ifp
#endif
)
{ register int ix;
register struct BlueFilter *nf;
if (f->BF_flags & BF_VALID)
return(EINVAL);
if (f->BF_flags & BF_IP)
{ if (BFIx == 0)
ix = BFIx = 1; /* Starting at 1 for IP */
else if (BFIx >= BFCount)
return(0); /* We'll just deal with it */
else
ix = ++BFIx;
} else if (!(f->BF_flags & BF_ATALK))
return(EINVAL);
else /* AppleTalk */
ix = 0;
nf = &RhapFilter[ix];
*nf = *f;
nf->BF_flags |= BF_VALID;
#ifdef BF_if
nf->BF_if = ifp;
#endif
return(0);
}
/*
* Y-adapter filter check
* The rules here:
* For Rhap: return 1
* For Both: return 0
* Not for Rhap: return -1
* Multicast/Broadcast => For Both
* Atalk address registered
* filter matches => For Rhap else Not For Rhap
* IP address registered
* filter matches => For Rhap else Not For Rhap
* For Rhap
* Note this is *not* a general filter mechanism in that we know
* what we *could* be looking for.
* WARNING: this is a big-endian routine.
* Note: ARP and AARP packets are implicitly accepted for "both"
*/
int
Filter_check(struct mbuf **m0)
{ register struct BlueFilter *bf;
register unsigned char *p;
register unsigned short *s;
register unsigned long *l;
int total, flags;
struct mbuf *m;
extern struct mbuf *m_pullup(struct mbuf *, int);
extern void kprintf( const char *, ...);
#define FILTER_LEN 32
m = *m0;
flags = m->m_flags;
if (FILTER_LEN > m->m_pkthdr.len)
return(1);
while ((FILTER_LEN > m->m_len) && m->m_next) {
total = m->m_len + (m->m_next)->m_len;
if ((m = m_pullup(m, min(FILTER_LEN, total))) == 0)
return(-1);
}
*m0 = m;
p = mtod(m, unsigned char *); /* Point to destination media addr */
if (p[0] & 0x01) /* Multicast/broadcast */
return(0);
s = (unsigned short *)p;
bf = &RhapFilter[BFS_ATALK];
#if 0
kprintf("!PKT: %x, %x, %x\n", s[6], s[7], s[8]);
#endif
if (bf->BF_flags) /* Filtering Appletalk */
{
l = (unsigned long *)&s[8];
#if 0
kprintf("!AT: %x, %x, %x, %x, %x, %x\n", s[6], s[7],
*l, s[10], s[13], p[30]);
#endif
if (s[6] <= ETHERMTU)
{ if (s[7] == 0xaaaa) /* Could be Atalk */
{ /* Verify SNAP header */
if (*l == 0x03080007 && s[10] == 0x809b)
{ if (s[13] == bf->BF_address &&
p[30] == bf->BF_node)
return(1);
} else if (*l == 0x03000000 && s[10] == 0x80f3)
/* AARP pkts aren't net-addressed */
return(0);
return(0);
} else /* Not for us? */
return(0);
} /* Fall through */
} /* Fall through */
bf++; /* Look for IP next */
if (bf->BF_flags) /* Filtering IP */
{
l = (unsigned long *)&s[15];
#if 0
kprintf("!IP: %x, %x\n", s[6], *l);
#endif
if (s[6] > ETHERMTU)
{ if (s[6] == 0x800) /* Is IP */
{ /* Verify IP address */
if (*l == bf->BF_address)
return(1);
else /* Not for us */
return(0);
} else if (s[6] == 0x806)
/* ARP pkts aren't net-addressed */
return(0);
}
}
return(0); /* No filters => Accept */
}
#endif /* ppc */