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freebsd-src/sys/net/if_ethersubr.c
David Greenman 1f91d8c563 Added fast IP forwarding code by Matt Thomas <matt@3am-software.com> via 
NetBSD, ported to FreeBSD by Pierre Beyssac <pb@fasterix.freenix.org> and
minorly tweaked by me.
This is a standard part of FreeBSD, but must be enabled with:
"sysctl -w net.inet.ip.fastforwarding=1" ...and of course forwarding must
also be enabled. This should probably be modified to use the zone
allocator for speed and space efficiency. The current algorithm also
appears to lose if the number of active paths exceeds IPFLOW_MAX (256),
in which case it wastes lots of time trying to figure out which cache
entry to drop.
1998-05-19 14:04:36 +00:00

877 lines
22 KiB
C
Raw Blame History

/*
* 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
* $Id: if_ethersubr.c,v 1.47 1998/03/30 09:51:39 phk Exp $
*/
#include "opt_atalk.h"
#include "opt_inet.h"
#include "opt_ipx.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.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>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.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>
ushort ns_nettype;
int ether_outputdebug = 0;
int ether_inputdebug = 0;
#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*/
#if defined(LLC) && defined(CCITT)
extern struct ifqueue pkintrq;
#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 */
#include "vlan.h"
#if NVLAN > 0
#include <net/if_vlan_var.h>
#endif /* NVLAN > 0 */
static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **,
struct sockaddr *));
u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
#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;
{
short type;
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;
#ifdef NETATALK
struct at_ifaddr *aa;
#endif NETATALK
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
rt = rt0;
if (rt) {
if ((rt->rt_flags & RTF_UP) == 0) {
rt0 = rt = rtalloc1(dst, 1, 0UL);
if (rt0)
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(ac, rt, m, dst, edst, rt0))
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;
type = htons(ETHERTYPE_IP);
break;
#endif
#ifdef IPX
case AF_IPX:
{
struct ifaddr *ia;
type = htons(ETHERTYPE_IPX);
bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
(caddr_t)edst, sizeof (edst));
for(ia = ifp->if_addrhead.tqh_first; ia != 0;
ia = ia->ifa_link.tqe_next) {
if(ia->ifa_addr->sa_family == AF_IPX &&
!bcmp((caddr_t)edst,
(caddr_t)&((struct ipx_ifaddr *)ia)->ia_addr.sipx_addr.x_host,
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 NETATALK
case AF_APPLETALK:
{
struct sockaddr_at *sat = (struct sockaddr_at *)dst;
/*
* super hack..
* Most of this loopback code should move into the appletalk
* code, but it's here for now.. remember to move it! [JRE]
* This may not get the same interface we started with,
* fix asap. XXX
*/
aa = at_ifawithnet( sat );
if (aa == NULL) {
goto bad;
}
if( aa->aa_ifa.ifa_ifp != ifp ) {
(*aa->aa_ifa.ifa_ifp->if_output)(aa->aa_ifa.ifa_ifp,
m,dst,rt);
}
if (((sat->sat_addr.s_net == ATADDR_ANYNET)
&& (sat->sat_addr.s_node == ATADDR_ANYNODE))
|| ((sat->sat_addr.s_net == aa->aa_addr.sat_addr.s_net )
&& (sat->sat_addr.s_node == aa->aa_addr.sat_addr.s_node))) {
(void) looutput(ifp, m, dst, rt);
return(0);
}
if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) {
#ifdef NETATALKDEBUG
extern char *prsockaddr(struct sockaddr *);
printf("aarpresolv: failed for %s\n", prsockaddr(dst));
#endif /* NETATALKDEBUG */
return (0);
}
/*
* 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);
}
/*
* 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_WAIT);
len += sizeof(struct llc);
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), sizeof(struct llc));
type = htons(m->m_pkthdr.len);
} else {
type = htons(ETHERTYPE_AT);
}
break;
#endif NETATALK
#ifdef NS
case AF_NS:
switch(ns_nettype){
default:
case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
type = 0x8137;
break;
case 0x0: /* Novell 802.3 */
type = htons( m->m_pkthdr.len);
break;
case 0xe0e0: /* Novell 802.2 and Token-Ring */
M_PREPEND(m, 3, M_WAIT);
type = htons( m->m_pkthdr.len);
cp = mtod(m, u_char *);
*cp++ = 0xE0;
*cp++ = 0xE0;
*cp++ = 0x03;
break;
}
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))){
m->m_pkthdr.rcvif = ifp;
schednetisr(NETISR_NS);
inq = &nsintrq;
s = splimp();
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m);
} else
IF_ENQUEUE(inq, m);
splx(s);
return (error);
}
if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){
m2 = m_copy(m, 0, (int)M_COPYALL);
m2->m_pkthdr.rcvif = ifp;
schednetisr(NETISR_NS);
inq = &nsintrq;
s = splimp();
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m2);
} else
IF_ENQUEUE(inq, m2);
splx(s);
}
/* 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 /* NS */
#ifdef 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);
type = htons(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 */
#ifdef 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));
}
}
type = htons(m->m_pkthdr.len);
#ifdef 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",
type & 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;
(void)memcpy(edst, eh->ether_dhost, sizeof (edst));
type = eh->ether_type;
break;
default:
printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
dst->sa_family);
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 *);
(void)memcpy(&eh->ether_type, &type,
sizeof(eh->ether_type));
(void)memcpy(eh->ether_dhost, edst, sizeof (edst));
(void)memcpy(eh->ether_shost, ac->ac_enaddr,
sizeof(eh->ether_shost));
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 (m->m_flags & M_MCAST)
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;
u_short ether_type;
int s;
#if defined (ISO) || defined (LLC) || defined(NETATALK)
register struct llc *l;
#endif
if ((ifp->if_flags & IFF_UP) == 0) {
m_freem(m);
return;
}
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++;
ether_type = ntohs(eh->ether_type);
#if NVLAN > 0
if (ether_type == vlan_proto) {
if (vlan_input(eh, m) < 0)
ifp->if_data.ifi_noproto++;
return;
}
#endif /* NVLAN > 0 */
switch (ether_type) {
#ifdef INET
case ETHERTYPE_IP:
if (ipflow_fastforward(m))
return;
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
case ETHERTYPE_ARP:
schednetisr(NETISR_ARP);
inq = &arpintrq;
break;
#endif
#ifdef IPX
case ETHERTYPE_IPX:
schednetisr(NETISR_IPX);
inq = &ipxintrq;
break;
#endif
#ifdef NS
case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
schednetisr(NETISR_NS);
inq = &nsintrq;
break;
#endif /* NS */
#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((struct arpcom *)ifp, m); /* XXX */
return;
#endif NETATALK
default:
#ifdef NS
checksum = mtod(m, ushort *);
/* Novell 802.3 */
if ((ether_type <= ETHERMTU) &&
((*checksum == 0xffff) || (*checksum == 0xE0E0))){
if(*checksum == 0xE0E0) {
m->m_pkthdr.len -= 3;
m->m_len -= 3;
m->m_data += 3;
}
schednetisr(NETISR_NS);
inq = &nsintrq;
break;
}
#endif /* NS */
#if defined (ISO) || defined (LLC) || defined(NETATALK)
if (ether_type > ETHERMTU)
goto dropanyway;
l = mtod(m, struct llc *);
switch (l->llc_dsap) {
#ifdef NETATALK
case LLC_SNAP_LSAP:
switch (l->llc_control) {
case LLC_UI:
if (l->llc_ssap != LLC_SNAP_LSAP)
goto dropanyway;
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, 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((struct arpcom *)ifp, m); /* XXX */
return;
}
default:
goto dropanyway;
}
break;
#endif NETATALK
#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 */
if (m->m_pkthdr.len > ether_type)
m_adj(m, ether_type - 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 */
#ifdef LLC
case LLC_X25_LSAP:
{
if (m->m_pkthdr.len > ether_type)
m_adj(m, ether_type - 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 = ether_type;
#ifdef 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 || NETATALK */
m_freem(m);
return;
#endif /* ISO || LLC || NETATALK */
}
s = splimp();
if (IF_QFULL(inq)) {
IF_DROP(inq);
m_freem(m);
} else
IF_ENQUEUE(inq, m);
splx(s);
}
/*
* 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;
ifp->if_type = IFT_ETHER;
ifp->if_addrlen = 6;
ifp->if_hdrlen = 14;
ifp->if_mtu = ETHERMTU;
ifp->if_resolvemulti = ether_resolvemulti;
if (ifp->if_baudrate == 0)
ifp->if_baudrate = 10000000;
ifa = ifnet_addrs[ifp->if_index - 1];
if (ifa == 0) {
printf("ether_ifattach: no lladdr!\n");
return;
}
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ifp->if_addrlen;
bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
}
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
int
ether_ioctl(ifp, command, data)
struct ifnet *ifp;
int command;
caddr_t data;
{
struct ifaddr *ifa = (struct ifaddr *) data;
struct ifreq *ifr = (struct ifreq *) data;
int error = 0;
switch (command) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
ifp->if_init(ifp->if_softc); /* before arpwhohas */
arp_ifinit((struct arpcom *)ifp, ifa);
break;
#endif
#ifdef IPX
/*
* XXX - This code is probably wrong
*/
case AF_IPX:
{
register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
struct arpcom *ac = (struct arpcom *) (ifp->if_softc);
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
#ifdef NS
/*
* XXX - This code is probably wrong
*/
case AF_NS:
{
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
struct arpcom *ac = (struct arpcom *) (ifp->if_softc);
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_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;
}
break;
case SIOCGIFADDR:
{
struct sockaddr *sa;
sa = (struct sockaddr *) & ifr->ifr_data;
bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr,
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
}
break;
case SIOCSIFMTU:
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
}
return (error);
}
int
ether_resolvemulti(ifp, llsa, sa)
struct ifnet *ifp;
struct sockaddr **llsa;
struct sockaddr *sa;
{
struct sockaddr_dl *sdl;
struct sockaddr_in *sin;
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,
M_WAITOK);
sdl->sdl_len = sizeof *sdl;
sdl->sdl_family = AF_LINK;
sdl->sdl_index = ifp->if_index;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_nlen = 0;
sdl->sdl_alen = ETHER_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
default:
/*
* Well, the text isn't quite right, but it's the name
* that counts...
*/
return EAFNOSUPPORT;
}
}
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