6e6b3f7cbc
1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,
The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.
Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:
- Kip Macy revised the locking code completely, thus completing
the last piece of the puzzle, Kip has also been conducting
active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
me maintaining that branch before the svn conversion
882 lines
19 KiB
C
882 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 rtentry *rt0)
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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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struct llentry *lle;
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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, rt0, 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, rt0, 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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IFQ_HANDOFF(ifp, m, error);
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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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|
*/
|
|
int
|
|
arc_isphds(u_int8_t type)
|
|
{
|
|
return (type != ARCTYPE_IP_OLD &&
|
|
type != ARCTYPE_ARP_OLD &&
|
|
type != ARCTYPE_DIAGNOSE);
|
|
}
|
|
|
|
/*
|
|
* Process a received Arcnet packet;
|
|
* the packet is in the mbuf chain m with
|
|
* the ARCnet header.
|
|
*/
|
|
void
|
|
arc_input(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct arc_header *ah;
|
|
int isr;
|
|
u_int8_t atype;
|
|
|
|
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;
|
|
}
|
|
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, 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(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;
|
|
}
|
|
}
|
|
|
|
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);
|