886 lines
19 KiB
C
886 lines
19 KiB
C
/* $NetBSD: if_arcsubr.c,v 1.36 2001/06/14 05:44:23 itojun Exp $ */
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/* $FreeBSD$ */
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/*-
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* Copyright (c) 1994, 1995 Ignatios Souvatzis
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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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* from: NetBSD: if_ethersubr.c,v 1.9 1994/06/29 06:36:11 cgd Exp
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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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*
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*/
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipx.h"
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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/module.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/sockio.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <machine/cpu.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_dl.h>
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#include <net/if_types.h>
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#include <net/if_arc.h>
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#include <net/if_arp.h>
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#include <net/bpf.h>
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#include <net/if_llatbl.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef INET6
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#include <netinet6/nd6.h>
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#endif
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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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#define ARCNET_ALLOW_BROKEN_ARP
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static struct mbuf *arc_defrag(struct ifnet *, struct mbuf *);
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static int arc_resolvemulti(struct ifnet *, struct sockaddr **,
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struct sockaddr *);
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u_int8_t arcbroadcastaddr = 0;
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#define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp))
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#define senderr(e) { error = (e); goto bad;}
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#define SIN(s) ((struct sockaddr_in *)s)
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#define SIPX(s) ((struct sockaddr_ipx *)s)
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/*
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* ARCnet output routine.
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* Encapsulate a packet of type family for the local net.
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* Assumes that ifp is actually pointer to arccom structure.
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*/
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int
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arc_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
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struct route *ro)
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{
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struct arc_header *ah;
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int error;
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u_int8_t atype, adst;
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int loop_copy = 0;
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int isphds;
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#if defined(INET) || defined(INET6)
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struct llentry *lle;
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#endif
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if (!((ifp->if_flags & IFF_UP) &&
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(ifp->if_drv_flags & IFF_DRV_RUNNING)))
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return(ENETDOWN); /* m, m1 aren't initialized yet */
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error = 0;
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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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/*
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* For now, use the simple IP addr -> ARCnet addr mapping
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*/
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if (m->m_flags & (M_BCAST|M_MCAST))
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adst = arcbroadcastaddr; /* ARCnet broadcast address */
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else if (ifp->if_flags & IFF_NOARP)
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adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF;
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else {
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error = arpresolve(ifp, ro ? ro->ro_rt : NULL,
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m, dst, &adst, &lle);
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if (error)
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return (error == EWOULDBLOCK ? 0 : error);
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}
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atype = (ifp->if_flags & IFF_LINK0) ?
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ARCTYPE_IP_OLD : ARCTYPE_IP;
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break;
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case AF_ARP:
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{
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struct arphdr *ah;
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ah = mtod(m, struct arphdr *);
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ah->ar_hrd = htons(ARPHRD_ARCNET);
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loop_copy = -1; /* if this is for us, don't do it */
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switch(ntohs(ah->ar_op)) {
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case ARPOP_REVREQUEST:
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case ARPOP_REVREPLY:
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atype = ARCTYPE_REVARP;
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break;
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case ARPOP_REQUEST:
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case ARPOP_REPLY:
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default:
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atype = ARCTYPE_ARP;
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break;
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}
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if (m->m_flags & M_BCAST)
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bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN);
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else
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bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN);
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}
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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error = nd6_storelladdr(ifp, m, dst, (u_char *)&adst, &lle);
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if (error)
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return (error);
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atype = ARCTYPE_INET6;
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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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adst = SIPX(dst)->sipx_addr.x_host.c_host[5];
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atype = ARCTYPE_IPX;
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if (adst == 0xff)
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adst = arcbroadcastaddr;
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break;
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#endif
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case AF_UNSPEC:
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loop_copy = -1;
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ah = (struct arc_header *)dst->sa_data;
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adst = ah->arc_dhost;
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atype = ah->arc_type;
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if (atype == ARCTYPE_ARP) {
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atype = (ifp->if_flags & IFF_LINK0) ?
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ARCTYPE_ARP_OLD: ARCTYPE_ARP;
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#ifdef ARCNET_ALLOW_BROKEN_ARP
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/*
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* XXX It's not clear per RFC826 if this is needed, but
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* "assigned numbers" say this is wrong.
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* However, e.g., AmiTCP 3.0Beta used it... we make this
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* switchable for emergency cases. Not perfect, but...
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*/
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if (ifp->if_flags & IFF_LINK2)
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mtod(m, struct arphdr *)->ar_pro = atype - 1;
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#endif
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}
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break;
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default:
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if_printf(ifp, "can't handle af%d\n", dst->sa_family);
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senderr(EAFNOSUPPORT);
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}
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isphds = arc_isphds(atype);
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M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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ah = mtod(m, struct arc_header *);
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ah->arc_type = atype;
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ah->arc_dhost = adst;
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ah->arc_shost = ARC_LLADDR(ifp);
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if (isphds) {
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ah->arc_flag = 0;
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ah->arc_seqid = 0;
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}
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if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
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if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
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struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
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(void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN);
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} else if (ah->arc_dhost == ah->arc_shost) {
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(void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN);
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return (0); /* XXX */
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}
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}
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BPF_MTAP(ifp, m);
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error = ifp->if_transmit(ifp, m);
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return (error);
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bad:
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if (m)
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m_freem(m);
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return (error);
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}
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void
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arc_frag_init(struct ifnet *ifp)
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{
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struct arccom *ac;
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ac = (struct arccom *)ifp->if_l2com;
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ac->curr_frag = 0;
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}
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struct mbuf *
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arc_frag_next(struct ifnet *ifp)
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{
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struct arccom *ac;
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struct mbuf *m;
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struct arc_header *ah;
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ac = (struct arccom *)ifp->if_l2com;
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if ((m = ac->curr_frag) == 0) {
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int tfrags;
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/* dequeue new packet */
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IF_DEQUEUE(&ifp->if_snd, m);
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if (m == 0)
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return 0;
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ah = mtod(m, struct arc_header *);
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if (!arc_isphds(ah->arc_type))
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return m;
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++ac->ac_seqid; /* make the seqid unique */
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tfrags = (m->m_pkthdr.len + ARC_MAX_DATA - 1) / ARC_MAX_DATA;
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ac->fsflag = 2 * tfrags - 3;
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ac->sflag = 0;
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ac->rsflag = ac->fsflag;
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ac->arc_dhost = ah->arc_dhost;
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ac->arc_shost = ah->arc_shost;
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ac->arc_type = ah->arc_type;
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m_adj(m, ARC_HDRNEWLEN);
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ac->curr_frag = m;
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}
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/* split out next fragment and return it */
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if (ac->sflag < ac->fsflag) {
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/* we CAN'T have short packets here */
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ac->curr_frag = m_split(m, ARC_MAX_DATA, M_DONTWAIT);
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if (ac->curr_frag == 0) {
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m_freem(m);
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return 0;
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}
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M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT);
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if (m == 0) {
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m_freem(ac->curr_frag);
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ac->curr_frag = 0;
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return 0;
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}
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ah = mtod(m, struct arc_header *);
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ah->arc_flag = ac->rsflag;
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ah->arc_seqid = ac->ac_seqid;
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ac->sflag += 2;
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ac->rsflag = ac->sflag;
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} else if ((m->m_pkthdr.len >=
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ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) &&
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(m->m_pkthdr.len <=
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ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) {
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ac->curr_frag = 0;
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M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_DONTWAIT);
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if (m == 0)
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return 0;
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ah = mtod(m, struct arc_header *);
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ah->arc_flag = 0xFF;
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ah->arc_seqid = 0xFFFF;
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ah->arc_type2 = ac->arc_type;
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ah->arc_flag2 = ac->sflag;
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ah->arc_seqid2 = ac->ac_seqid;
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} else {
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ac->curr_frag = 0;
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M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT);
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if (m == 0)
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return 0;
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ah = mtod(m, struct arc_header *);
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ah->arc_flag = ac->sflag;
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ah->arc_seqid = ac->ac_seqid;
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}
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ah->arc_dhost = ac->arc_dhost;
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ah->arc_shost = ac->arc_shost;
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ah->arc_type = ac->arc_type;
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return m;
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}
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/*
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* Defragmenter. Returns mbuf if last packet found, else
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* NULL. frees imcoming mbuf as necessary.
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*/
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static __inline struct mbuf *
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arc_defrag(struct ifnet *ifp, struct mbuf *m)
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{
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struct arc_header *ah, *ah1;
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struct arccom *ac;
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struct ac_frag *af;
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struct mbuf *m1;
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char *s;
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int newflen;
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u_char src,dst,typ;
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ac = (struct arccom *)ifp->if_l2com;
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if (m->m_len < ARC_HDRNEWLEN) {
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m = m_pullup(m, ARC_HDRNEWLEN);
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if (m == NULL) {
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++ifp->if_ierrors;
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return NULL;
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}
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}
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ah = mtod(m, struct arc_header *);
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typ = ah->arc_type;
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if (!arc_isphds(typ))
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return m;
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src = ah->arc_shost;
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dst = ah->arc_dhost;
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if (ah->arc_flag == 0xff) {
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m_adj(m, 4);
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if (m->m_len < ARC_HDRNEWLEN) {
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m = m_pullup(m, ARC_HDRNEWLEN);
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if (m == NULL) {
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++ifp->if_ierrors;
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return NULL;
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}
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}
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ah = mtod(m, struct arc_header *);
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}
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af = &ac->ac_fragtab[src];
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m1 = af->af_packet;
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s = "debug code error";
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if (ah->arc_flag & 1) {
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/*
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* first fragment. We always initialize, which is
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* about the right thing to do, as we only want to
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* accept one fragmented packet per src at a time.
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*/
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if (m1 != NULL)
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m_freem(m1);
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af->af_packet = m;
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m1 = m;
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af->af_maxflag = ah->arc_flag;
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af->af_lastseen = 0;
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af->af_seqid = ah->arc_seqid;
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return NULL;
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/* notreached */
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} else {
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/* check for unfragmented packet */
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if (ah->arc_flag == 0)
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return m;
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/* do we have a first packet from that src? */
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if (m1 == NULL) {
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s = "no first frag";
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goto outofseq;
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}
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ah1 = mtod(m1, struct arc_header *);
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if (ah->arc_seqid != ah1->arc_seqid) {
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s = "seqid differs";
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goto outofseq;
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}
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if (typ != ah1->arc_type) {
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s = "type differs";
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goto outofseq;
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}
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if (dst != ah1->arc_dhost) {
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s = "dest host differs";
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goto outofseq;
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}
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/* typ, seqid and dst are ok here. */
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if (ah->arc_flag == af->af_lastseen) {
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m_freem(m);
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return NULL;
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}
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if (ah->arc_flag == af->af_lastseen + 2) {
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/* ok, this is next fragment */
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af->af_lastseen = ah->arc_flag;
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m_adj(m,ARC_HDRNEWLEN);
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/*
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* m_cat might free the first mbuf (with pkthdr)
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* in 2nd chain; therefore:
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*/
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newflen = m->m_pkthdr.len;
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m_cat(m1,m);
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m1->m_pkthdr.len += newflen;
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/* is it the last one? */
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if (af->af_lastseen > af->af_maxflag) {
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af->af_packet = NULL;
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return(m1);
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} else
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return NULL;
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}
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s = "other reason";
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/* if all else fails, it is out of sequence, too */
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}
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outofseq:
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if (m1) {
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m_freem(m1);
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af->af_packet = NULL;
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}
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if (m)
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m_freem(m);
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log(LOG_INFO,"%s: got out of seq. packet: %s\n",
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ifp->if_xname, s);
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return NULL;
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}
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/*
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* return 1 if Packet Header Definition Standard, else 0.
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* For now: old IP, old ARP aren't obviously. Lacking correct information,
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* we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS.
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* (Apple and Novell corporations were involved, among others, in PHDS work).
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* Easiest is to assume that everybody else uses that, too.
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*/
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int
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arc_isphds(u_int8_t type)
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{
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return (type != ARCTYPE_IP_OLD &&
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type != ARCTYPE_ARP_OLD &&
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type != ARCTYPE_DIAGNOSE);
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}
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/*
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* Process a received Arcnet packet;
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* the packet is in the mbuf chain m with
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* the ARCnet header.
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*/
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void
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arc_input(struct ifnet *ifp, struct mbuf *m)
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{
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struct arc_header *ah;
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int isr;
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u_int8_t atype;
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if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
/* possibly defragment: */
|
|
m = arc_defrag(ifp, m);
|
|
if (m == NULL)
|
|
return;
|
|
|
|
BPF_MTAP(ifp, m);
|
|
|
|
ah = mtod(m, struct arc_header *);
|
|
/* does this belong to us? */
|
|
if ((ifp->if_flags & IFF_PROMISC) == 0
|
|
&& ah->arc_dhost != arcbroadcastaddr
|
|
&& ah->arc_dhost != ARC_LLADDR(ifp)) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
|
|
if (ah->arc_dhost == arcbroadcastaddr) {
|
|
m->m_flags |= M_BCAST|M_MCAST;
|
|
ifp->if_imcasts++;
|
|
}
|
|
|
|
atype = ah->arc_type;
|
|
switch (atype) {
|
|
#ifdef INET
|
|
case ARCTYPE_IP:
|
|
m_adj(m, ARC_HDRNEWLEN);
|
|
if ((m = ip_fastforward(m)) == NULL)
|
|
return;
|
|
isr = NETISR_IP;
|
|
break;
|
|
|
|
case ARCTYPE_IP_OLD:
|
|
m_adj(m, ARC_HDRLEN);
|
|
if ((m = ip_fastforward(m)) == NULL)
|
|
return;
|
|
isr = NETISR_IP;
|
|
break;
|
|
|
|
case ARCTYPE_ARP:
|
|
if (ifp->if_flags & IFF_NOARP) {
|
|
/* Discard packet if ARP is disabled on interface */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
m_adj(m, ARC_HDRNEWLEN);
|
|
isr = NETISR_ARP;
|
|
#ifdef ARCNET_ALLOW_BROKEN_ARP
|
|
mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
|
|
#endif
|
|
break;
|
|
|
|
case ARCTYPE_ARP_OLD:
|
|
if (ifp->if_flags & IFF_NOARP) {
|
|
/* Discard packet if ARP is disabled on interface */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
m_adj(m, ARC_HDRLEN);
|
|
isr = NETISR_ARP;
|
|
#ifdef ARCNET_ALLOW_BROKEN_ARP
|
|
mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
|
|
#endif
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case ARCTYPE_INET6:
|
|
m_adj(m, ARC_HDRNEWLEN);
|
|
isr = NETISR_IPV6;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case ARCTYPE_IPX:
|
|
m_adj(m, ARC_HDRNEWLEN);
|
|
isr = NETISR_IPX;
|
|
break;
|
|
#endif
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
M_SETFIB(m, ifp->if_fib);
|
|
netisr_dispatch(isr, m);
|
|
}
|
|
|
|
/*
|
|
* Register (new) link level address.
|
|
*/
|
|
void
|
|
arc_storelladdr(struct ifnet *ifp, u_int8_t lla)
|
|
{
|
|
ARC_LLADDR(ifp) = lla;
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
arc_ifattach(struct ifnet *ifp, u_int8_t lla)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_dl *sdl;
|
|
struct arccom *ac;
|
|
|
|
if_attach(ifp);
|
|
ifp->if_addrlen = 1;
|
|
ifp->if_hdrlen = ARC_HDRLEN;
|
|
ifp->if_mtu = 1500;
|
|
ifp->if_resolvemulti = arc_resolvemulti;
|
|
if (ifp->if_baudrate == 0)
|
|
ifp->if_baudrate = 2500000;
|
|
#if __FreeBSD_version < 500000
|
|
ifa = ifnet_addrs[ifp->if_index - 1];
|
|
#else
|
|
ifa = ifp->if_addr;
|
|
#endif
|
|
KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
sdl->sdl_type = IFT_ARCNET;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
|
|
if (ifp->if_flags & IFF_BROADCAST)
|
|
ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI;
|
|
|
|
ac = (struct arccom *)ifp->if_l2com;
|
|
ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */
|
|
if (lla == 0) {
|
|
/* XXX this message isn't entirely clear, to me -- cgd */
|
|
log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n",
|
|
ifp->if_xname, ifp->if_xname);
|
|
}
|
|
arc_storelladdr(ifp, lla);
|
|
|
|
ifp->if_broadcastaddr = &arcbroadcastaddr;
|
|
|
|
bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN);
|
|
}
|
|
|
|
void
|
|
arc_ifdetach(struct ifnet *ifp)
|
|
{
|
|
bpfdetach(ifp);
|
|
if_detach(ifp);
|
|
}
|
|
|
|
int
|
|
arc_ioctl(struct ifnet *ifp, u_long 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(ifp, ifa);
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
/*
|
|
* XXX This code is probably wrong
|
|
*/
|
|
case AF_IPX:
|
|
{
|
|
struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
|
|
|
|
if (ipx_nullhost(*ina))
|
|
ina->x_host.c_host[5] = ARC_LLADDR(ifp);
|
|
else
|
|
arc_storelladdr(ifp, ina->x_host.c_host[5]);
|
|
|
|
/*
|
|
* 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;
|
|
*(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp);
|
|
}
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (ifr == NULL)
|
|
error = EAFNOSUPPORT;
|
|
else {
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
error = 0;
|
|
break;
|
|
default:
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/*
|
|
* Set the interface MTU.
|
|
* mtu can't be larger than ARCMTU for RFC1051
|
|
* and can't be larger than ARC_PHDS_MTU
|
|
*/
|
|
if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) ||
|
|
ifr->ifr_mtu > ARC_PHDS_MAXMTU)
|
|
error = EINVAL;
|
|
else
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/* based on ether_resolvemulti() */
|
|
int
|
|
arc_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
|
|
struct sockaddr *sa)
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
#ifdef INET
|
|
struct sockaddr_in *sin;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
|
|
switch(sa->sa_family) {
|
|
case AF_LINK:
|
|
/*
|
|
* No mapping needed. Just check that it's a valid MC address.
|
|
*/
|
|
sdl = (struct sockaddr_dl *)sa;
|
|
if (*LLADDR(sdl) != arcbroadcastaddr)
|
|
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;
|
|
sdl = malloc(sizeof *sdl, M_IFMADDR,
|
|
M_NOWAIT | M_ZERO);
|
|
if (sdl == NULL)
|
|
return ENOMEM;
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ARCNET;
|
|
sdl->sdl_alen = ARC_ADDR_LEN;
|
|
*LLADDR(sdl) = 0;
|
|
*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;
|
|
sdl = malloc(sizeof *sdl, M_IFMADDR,
|
|
M_NOWAIT | M_ZERO);
|
|
if (sdl == NULL)
|
|
return ENOMEM;
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ARCNET;
|
|
sdl->sdl_alen = ARC_ADDR_LEN;
|
|
*LLADDR(sdl) = 0;
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return 0;
|
|
#endif
|
|
|
|
default:
|
|
/*
|
|
* Well, the text isn't quite right, but it's the name
|
|
* that counts...
|
|
*/
|
|
return EAFNOSUPPORT;
|
|
}
|
|
}
|
|
|
|
static MALLOC_DEFINE(M_ARCCOM, "arccom", "ARCNET interface internals");
|
|
|
|
static void*
|
|
arc_alloc(u_char type, struct ifnet *ifp)
|
|
{
|
|
struct arccom *ac;
|
|
|
|
ac = malloc(sizeof(struct arccom), M_ARCCOM, M_WAITOK | M_ZERO);
|
|
ac->ac_ifp = ifp;
|
|
|
|
return (ac);
|
|
}
|
|
|
|
static void
|
|
arc_free(void *com, u_char type)
|
|
{
|
|
|
|
free(com, M_ARCCOM);
|
|
}
|
|
|
|
static int
|
|
arc_modevent(module_t mod, int type, void *data)
|
|
{
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if_register_com_alloc(IFT_ARCNET, arc_alloc, arc_free);
|
|
break;
|
|
case MOD_UNLOAD:
|
|
if_deregister_com_alloc(IFT_ARCNET);
|
|
break;
|
|
default:
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static moduledata_t arc_mod = {
|
|
"arcnet",
|
|
arc_modevent,
|
|
0
|
|
};
|
|
|
|
DECLARE_MODULE(arcnet, arc_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
|
|
MODULE_VERSION(arcnet, 1);
|