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350 lines
8.8 KiB
350 lines
8.8 KiB
/* $OpenBSD: if_loop.c,v 1.11 1999/01/08 00:56:45 deraadt Exp $ */
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/* $NetBSD: if_loop.c,v 1.15 1996/05/07 02:40:33 thorpej Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* 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. Neither the name of the project 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 PROJECT 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 PROJECT 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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/*
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* Copyright (c) 1982, 1986, 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_loop.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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%%% portions-copyright-nrl-95
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Portions of this software are Copyright 1995-1998 by Randall Atkinson,
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Ronald Lee, Daniel McDonald, Bao Phan, and Chris Winters. All Rights
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Reserved. All rights under this copyright have been assigned to the US
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Naval Research Laboratory (NRL). The NRL Copyright Notice and License
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Agreement Version 1.1 (January 17, 1995) applies to these portions of the
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software.
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You should have received a copy of the license with this software. If you
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didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>.
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*/
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/*
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* Loopback interface driver for protocol testing and timing.
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*/
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#include "bpfilter.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/mbuf.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <machine/cpu.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#endif
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet6/in6_var.h>
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#include <netinet/ip6.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 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 ISO
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#include <netiso/iso.h>
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#include <netiso/iso_var.h>
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#endif
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#ifdef NETATALK
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#include <netinet/if_ether.h>
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#endif
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#if defined(LARGE_LOMTU)
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#define LOMTU (131072 + MHLEN + MLEN)
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#else
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#define LOMTU (32768 + MHLEN + MLEN)
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#endif
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void
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loopattach(n)
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int n;
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{
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register int i;
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register struct ifnet *ifp;
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for (i = n; i--; ) {
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MALLOC(ifp, struct ifnet *, sizeof(*ifp), M_DEVBUF, M_NOWAIT);
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if (ifp == NULL)
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return;
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bzero(ifp, sizeof(struct ifnet));
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if (i == 0)
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lo0ifp = ifp;
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sprintf(ifp->if_xname, "lo%d", i);
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ifp->if_softc = NULL;
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ifp->if_mtu = LOMTU;
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ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
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ifp->if_ioctl = loioctl;
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ifp->if_output = looutput;
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ifp->if_type = IFT_LOOP;
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ifp->if_hdrlen = sizeof(u_int32_t);
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ifp->if_addrlen = 0;
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if_attachhead(ifp);
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#if NBPFILTER > 0
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bpfattach(&ifp->if_bpf, ifp, DLT_LOOP, sizeof(u_int32_t));
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#endif
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}
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}
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int
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looutput(ifp, m, dst, rt)
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struct ifnet *ifp;
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register struct mbuf *m;
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struct sockaddr *dst;
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register struct rtentry *rt;
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{
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int s, isr;
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register struct ifqueue *ifq = 0;
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if ((m->m_flags & M_PKTHDR) == 0)
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panic("looutput: no header mbuf");
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ifp->if_lastchange = time;
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#if NBPFILTER > 0
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/*
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* only send packets to bpf if they are real loopback packets;
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* looutput() is also called for SIMPLEX interfaces to duplicate
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* packets for local use. But don't dup them to bpf.
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*/
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if (ifp->if_bpf && (ifp->if_flags&IFF_LOOPBACK)) {
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/*
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* We need to prepend the address family as
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* a four byte field. Cons up a dummy header
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* to pacify bpf. This is safe because bpf
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* will only read from the mbuf (i.e., it won't
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* try to free it or keep a pointer to it).
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*/
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struct mbuf m0;
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u_int32_t af = htonl(dst->sa_family);
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m0.m_next = m;
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m0.m_len = sizeof(af);
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m0.m_data = (char *)⁡
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bpf_mtap(ifp->if_bpf, &m0);
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}
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#endif
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m->m_pkthdr.rcvif = ifp;
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if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
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m_freem(m);
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return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
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rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
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}
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ifp->if_opackets++;
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ifp->if_obytes += m->m_pkthdr.len;
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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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ifq = &ipintrq;
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isr = NETISR_IP;
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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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ifq = &ip6intrq;
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isr = NETISR_IPV6;
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break;
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#endif /* INET6 */
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#ifdef NS
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case AF_NS:
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ifq = &nsintrq;
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isr = NETISR_NS;
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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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ifq = &ipxintrq;
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isr = NETISR_IPX;
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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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ifq = &clnlintrq;
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isr = NETISR_ISO;
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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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ifq = &atintrq2;
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isr = NETISR_ATALK;
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break;
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#endif NETATALK
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default:
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printf("%s: can't handle af%d\n", ifp->if_xname,
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dst->sa_family);
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m_freem(m);
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return (EAFNOSUPPORT);
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}
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s = splimp();
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if (IF_QFULL(ifq)) {
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IF_DROP(ifq);
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m_freem(m);
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splx(s);
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return (ENOBUFS);
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}
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IF_ENQUEUE(ifq, m);
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schednetisr(isr);
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ifp->if_ipackets++;
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ifp->if_ibytes += m->m_pkthdr.len;
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splx(s);
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return (0);
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}
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/* ARGSUSED */
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void
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lortrequest(cmd, rt, sa)
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int cmd;
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struct rtentry *rt;
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struct sockaddr *sa;
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{
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if (rt)
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rt->rt_rmx.rmx_mtu = LOMTU;
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}
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/*
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* Process an ioctl request.
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*/
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/* ARGSUSED */
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int
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loioctl(ifp, cmd, data)
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register struct ifnet *ifp;
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u_long cmd;
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caddr_t data;
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{
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register struct ifaddr *ifa;
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register struct ifreq *ifr;
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register int error = 0;
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switch (cmd) {
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case SIOCSIFADDR:
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ifp->if_flags |= IFF_UP;
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ifa = (struct ifaddr *)data;
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if (ifa != 0 /*&& ifa->ifa_addr->sa_family == AF_ISO*/)
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ifa->ifa_rtrequest = lortrequest;
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/*
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* Everything else is done at a higher level.
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*/
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break;
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case SIOCADDMULTI:
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case SIOCDELMULTI:
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ifr = (struct ifreq *)data;
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if (ifr == 0) {
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error = EAFNOSUPPORT; /* XXX */
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break;
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}
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switch (ifr->ifr_addr.sa_family) {
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#ifdef INET
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case AF_INET:
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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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break;
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#endif /* INET6 */
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default:
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error = EAFNOSUPPORT;
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break;
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}
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break;
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default:
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error = EINVAL;
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}
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return (error);
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}
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