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789 lines
20 KiB
C
789 lines
20 KiB
C
/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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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, this list of conditions and the following 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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* $Id: if_ethersubr.c,v 1.18 1996/06/10 23:07:30 gpalmer Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/syslog.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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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#endif
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#include <netinet/if_ether.h>
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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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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#ifdef ISO
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#include <netiso/argo_debug.h>
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#include <netiso/iso.h>
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#include <netiso/iso_var.h>
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#include <netiso/iso_snpac.h>
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#endif
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/*#ifdef LLC
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#include <netccitt/dll.h>
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#include <netccitt/llc_var.h>
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#endif*/
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#if defined(LLC) && defined(CCITT)
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extern struct ifqueue pkintrq;
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#endif
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#ifdef NETATALK
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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extern u_char at_org_code[ 3 ];
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extern u_char aarp_org_code[ 3 ];
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#endif NETATALK
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u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#define senderr(e) { error = (e); goto bad;}
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/*
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* Ethernet output routine.
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* Encapsulate a packet of type family for the local net.
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* Use trailer local net encapsulation if enough data in first
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* packet leaves a multiple of 512 bytes of data in remainder.
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* Assumes that ifp is actually pointer to arpcom structure.
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*/
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int
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ether_output(ifp, m0, dst, rt0)
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register struct ifnet *ifp;
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struct mbuf *m0;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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short type;
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int s, error = 0;
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u_char edst[6];
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register struct mbuf *m = m0;
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register struct rtentry *rt;
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struct mbuf *mcopy = (struct mbuf *)0;
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register struct ether_header *eh;
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int off, len = m->m_pkthdr.len;
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struct arpcom *ac = (struct arpcom *)ifp;
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#ifdef NETATALK
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struct at_ifaddr *aa;
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#endif NETATALK
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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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rt = rt0;
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if (rt) {
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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.tv_sec < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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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(ac, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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off = m->m_pkthdr.len - m->m_len;
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type = ETHERTYPE_IP;
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break;
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#endif
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#ifdef IPX
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case AF_IPX:
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type = ETHERTYPE_IPX;
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bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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if (!bcmp((caddr_t)edst, (caddr_t)&ipx_thishost, sizeof(edst)))
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return (looutput(ifp, m, dst, rt));
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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break;
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#endif
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#ifdef NETATALK
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case AF_APPLETALK:
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) {
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#ifdef NETATALKDEBUG
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extern char *prsockaddr(struct sockaddr *);
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printf("aarpresolv: failed for %s\n", prsockaddr(dst));
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#endif NETATALKDEBUG
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return (0);
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}
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/*
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* ifaddr is the first thing in at_ifaddr
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*/
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if ((aa = (struct at_ifaddr *)at_ifawithnet(
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(struct sockaddr_at *)dst, ifp->if_addrlist))
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== 0)
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goto bad;
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/*
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* In the phase 2 case, we need to prepend an mbuf for the llc header.
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* Since we must preserve the value of m, which is passed to us by
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* value, we m_copy() the first mbuf, and use it for our llc header.
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*/
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if ( aa->aa_flags & AFA_PHASE2 ) {
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struct llc llc;
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M_PREPEND(m, sizeof(struct llc), M_WAIT);
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len += sizeof(struct llc);
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llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
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llc.llc_control = LLC_UI;
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bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
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llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
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bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
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type = m->m_pkthdr.len;
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} else {
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type = ETHERTYPE_AT;
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}
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break;
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#endif NETATALK
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#ifdef NS
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case AF_NS:
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type = ETHERTYPE_NS;
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bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst)))
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return (looutput(ifp, m, dst, rt));
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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break;
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#endif
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#ifdef ISO
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case AF_ISO: {
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int snpalen;
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struct llc *l;
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register struct sockaddr_dl *sdl;
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if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
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sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
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} else if (error =
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iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
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(char *)edst, &snpalen))
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goto bad; /* Not Resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if (*edst & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT);
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if (mcopy) {
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eh = mtod(mcopy, struct ether_header *);
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bcopy((caddr_t)edst,
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(caddr_t)eh->ether_dhost, sizeof (edst));
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bcopy((caddr_t)ac->ac_enaddr,
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(caddr_t)eh->ether_shost, sizeof (edst));
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}
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}
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M_PREPEND(m, 3, M_DONTWAIT);
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if (m == NULL)
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return (0);
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type = m->m_pkthdr.len;
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l = mtod(m, struct llc *);
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l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
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l->llc_control = LLC_UI;
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len += 3;
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IFDEBUG(D_ETHER)
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int i;
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printf("unoutput: sending pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf("\n");
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ENDDEBUG
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} break;
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#endif /* ISO */
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#ifdef LLC
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/* case AF_NSAP: */
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case AF_CCITT: {
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register struct sockaddr_dl *sdl =
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(struct sockaddr_dl *) rt -> rt_gateway;
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if (sdl && sdl->sdl_family == AF_LINK
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&& sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (char *)edst,
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sizeof(edst));
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} else goto bad; /* Not a link interface ? Funny ... */
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if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT);
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if (mcopy) {
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eh = mtod(mcopy, struct ether_header *);
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bcopy((caddr_t)edst,
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(caddr_t)eh->ether_dhost, sizeof (edst));
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bcopy((caddr_t)ac->ac_enaddr,
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(caddr_t)eh->ether_shost, sizeof (edst));
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}
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}
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type = m->m_pkthdr.len;
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#ifdef LLC_DEBUG
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{
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int i;
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register struct llc *l = mtod(m, struct llc *);
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printf("ether_output: sending LLC2 pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
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type & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
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l->llc_control & 0xff);
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}
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#endif /* LLC_DEBUG */
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} break;
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#endif /* LLC */
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case AF_UNSPEC:
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy(edst, eh->ether_dhost, sizeof (edst));
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type = eh->ether_type;
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break;
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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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}
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|
|
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if (mcopy)
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(void) looutput(ifp, mcopy, dst, rt);
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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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M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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eh = mtod(m, struct ether_header *);
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type = htons((u_short)type);
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(void)memcpy(&eh->ether_type, &type,
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sizeof(eh->ether_type));
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(void)memcpy(eh->ether_dhost, edst, sizeof (edst));
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(void)memcpy(eh->ether_shost, ac->ac_enaddr,
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sizeof(eh->ether_shost));
|
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s = splimp();
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/*
|
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* Queue message on interface, and start output if interface
|
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* not yet active.
|
|
*/
|
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if (IF_QFULL(&ifp->if_snd)) {
|
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IF_DROP(&ifp->if_snd);
|
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splx(s);
|
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senderr(ENOBUFS);
|
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}
|
|
IF_ENQUEUE(&ifp->if_snd, m);
|
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if ((ifp->if_flags & IFF_OACTIVE) == 0)
|
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(*ifp->if_start)(ifp);
|
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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
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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)
|
|
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 (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
|
|
sizeof(etherbroadcastaddr)) == 0)
|
|
m->m_flags |= M_BCAST;
|
|
else if (eh->ether_dhost[0] & 1)
|
|
m->m_flags |= M_MCAST;
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
ifp->if_imcasts++;
|
|
|
|
ether_type = ntohs(eh->ether_type);
|
|
|
|
switch (ether_type) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
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 ETHERTYPE_NS:
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
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((struct arpcom *)ifp, m); /* XXX */
|
|
return;
|
|
#endif NETATALK
|
|
default:
|
|
#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;
|
|
if (ifp->if_baudrate == 0)
|
|
ifp->if_baudrate = 10000000;
|
|
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;
|
|
}
|
|
}
|
|
|
|
static u_char ether_ipmulticast_min[6] =
|
|
{ 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
|
|
static 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 set_allmulti = 0;
|
|
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;
|
|
|
|
#ifdef 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);
|
|
set_allmulti = 1;
|
|
}
|
|
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_NOWAIT);
|
|
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);
|
|
if (set_allmulti)
|
|
ac->ac_if.if_flags |= IFF_ALLMULTI;
|
|
|
|
/*
|
|
* 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)
|
|
struct ifreq *ifr;
|
|
register struct arpcom *ac;
|
|
{
|
|
register struct ether_multi *enm;
|
|
register struct ether_multi **p;
|
|
struct sockaddr_in *sin;
|
|
u_char addrlo[6];
|
|
u_char addrhi[6];
|
|
int unset_allmulti = 0;
|
|
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;
|
|
|
|
#ifdef 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);
|
|
unset_allmulti = 1;
|
|
}
|
|
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);
|
|
}
|
|
/*
|
|
* 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);
|
|
if (unset_allmulti)
|
|
ac->ac_if.if_flags &= ~IFF_ALLMULTI;
|
|
|
|
/*
|
|
* Return ENETRESET to inform the driver that the list has changed
|
|
* and its reception filter should be adjusted accordingly.
|
|
*/
|
|
return (ENETRESET);
|
|
}
|
|
|
|
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
|