498 lines
11 KiB
C
498 lines
11 KiB
C
/* $NetBSD: if_loop.c,v 1.55 2005/02/26 22:45:09 perry Exp $ */
|
|
|
|
/*
|
|
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)if_loop.c 8.2 (Berkeley) 1/9/95
|
|
*/
|
|
|
|
/*
|
|
* Loopback interface driver for protocol testing and timing.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: if_loop.c,v 1.55 2005/02/26 22:45:09 perry Exp $");
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_atalk.h"
|
|
#include "opt_iso.h"
|
|
#include "opt_ns.h"
|
|
#include "opt_ipx.h"
|
|
#include "opt_mbuftrace.h"
|
|
|
|
#include "bpfilter.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <machine/cpu.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/netisr.h>
|
|
#include <net/route.h>
|
|
|
|
#ifdef INET
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/ip.h>
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
#ifndef INET
|
|
#include <netinet/in.h>
|
|
#endif
|
|
#include <netinet6/in6_var.h>
|
|
#include <netinet/ip6.h>
|
|
#endif
|
|
|
|
#ifdef NS
|
|
#include <netns/ns.h>
|
|
#include <netns/ns_if.h>
|
|
#endif
|
|
|
|
#ifdef IPX
|
|
#include <netipx/ipx.h>
|
|
#include <netipx/ipx_if.h>
|
|
#endif
|
|
|
|
#ifdef ISO
|
|
#include <netiso/iso.h>
|
|
#include <netiso/iso_var.h>
|
|
#endif
|
|
|
|
#ifdef NETATALK
|
|
#include <netatalk/at.h>
|
|
#include <netatalk/at_var.h>
|
|
#endif
|
|
|
|
#if NBPFILTER > 0
|
|
#include <net/bpf.h>
|
|
#endif
|
|
|
|
#if defined(LARGE_LOMTU)
|
|
#define LOMTU (131072 + MHLEN + MLEN)
|
|
#define LOMTU_MAX LOMTU
|
|
#else
|
|
#define LOMTU (32768 + MHLEN + MLEN)
|
|
#define LOMTU_MAX (65536 + MHLEN + MLEN)
|
|
#endif
|
|
|
|
#ifdef ALTQ
|
|
void lostart(struct ifnet *);
|
|
#endif
|
|
|
|
struct loop_softc {
|
|
LIST_ENTRY(loop_softc) sc_list;
|
|
struct ifnet sc_if;
|
|
};
|
|
|
|
LIST_HEAD(, loop_softc) loop_softc_list;
|
|
|
|
int loop_clone_create(struct if_clone *, int);
|
|
int loop_clone_destroy(struct ifnet *);
|
|
|
|
struct if_clone loop_cloner =
|
|
IF_CLONE_INITIALIZER("lo", loop_clone_create, loop_clone_destroy);
|
|
|
|
void
|
|
loopattach(int n)
|
|
{
|
|
LIST_INIT(&loop_softc_list);
|
|
|
|
(void)loop_clone_create(&loop_cloner, 0); /* lo0 always exists */
|
|
if_clone_attach(&loop_cloner);
|
|
}
|
|
|
|
int
|
|
loop_clone_create(struct if_clone *ifc, int unit)
|
|
{
|
|
struct loop_softc *sc;
|
|
|
|
sc = malloc(sizeof(struct loop_softc), M_DEVBUF, M_WAITOK | M_ZERO);
|
|
|
|
snprintf(sc->sc_if.if_xname, sizeof(sc->sc_if.if_xname), "%s%d",
|
|
ifc->ifc_name, unit);
|
|
|
|
sc->sc_if.if_softc = sc;
|
|
sc->sc_if.if_mtu = LOMTU;
|
|
sc->sc_if.if_flags = IFF_LOOPBACK | IFF_MULTICAST;
|
|
sc->sc_if.if_ioctl = loioctl;
|
|
sc->sc_if.if_output = looutput;
|
|
#ifdef ALTQ
|
|
sc->sc_if.if_start = lostart;
|
|
#endif
|
|
sc->sc_if.if_type = IFT_LOOP;
|
|
sc->sc_if.if_hdrlen = 0;
|
|
sc->sc_if.if_addrlen = 0;
|
|
sc->sc_if.if_dlt = DLT_NULL;
|
|
IFQ_SET_READY(&sc->sc_if.if_snd);
|
|
if (unit == 0)
|
|
lo0ifp = &sc->sc_if;
|
|
if_attach(&sc->sc_if);
|
|
if_alloc_sadl(&sc->sc_if);
|
|
#if NBPFILTER > 0
|
|
bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
|
|
#endif
|
|
#ifdef MBUFTRACE
|
|
sc->sc_if.if_mowner = malloc(sizeof(struct mowner), M_DEVBUF,
|
|
M_WAITOK | M_ZERO);
|
|
strlcpy(sc->sc_if.if_mowner->mo_name, sc->sc_if.if_xname,
|
|
sizeof(sc->sc_if.if_mowner->mo_name));
|
|
MOWNER_ATTACH(sc->sc_if.if_mowner);
|
|
#endif
|
|
LIST_INSERT_HEAD(&loop_softc_list, sc, sc_list);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
loop_clone_destroy(struct ifnet *ifp)
|
|
{
|
|
struct loop_softc *sc = ifp->if_softc;
|
|
|
|
if (ifp == lo0ifp)
|
|
return (EPERM);
|
|
|
|
#ifdef MBUFTRACE
|
|
MOWNER_DETACH(ifp->if_mowner);
|
|
free(ifp->if_mowner, M_DEVBUF);
|
|
#endif
|
|
|
|
#if NBPFILTER > 0
|
|
bpfdetach(ifp);
|
|
#endif
|
|
if_detach(ifp);
|
|
|
|
LIST_REMOVE(sc, sc_list);
|
|
free(sc, M_DEVBUF);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
|
|
struct rtentry *rt)
|
|
{
|
|
int s, isr;
|
|
struct ifqueue *ifq = NULL;
|
|
|
|
MCLAIM(m, ifp->if_mowner);
|
|
if ((m->m_flags & M_PKTHDR) == 0)
|
|
panic("looutput: no header mbuf");
|
|
#if NBPFILTER > 0
|
|
if (ifp->if_bpf && (ifp->if_flags & IFF_LOOPBACK))
|
|
bpf_mtap_af(ifp->if_bpf, dst->sa_family, m);
|
|
#endif
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
|
|
m_freem(m);
|
|
return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
|
|
rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
|
|
}
|
|
|
|
ifp->if_opackets++;
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
|
|
|
#ifdef ALTQ
|
|
/*
|
|
* ALTQ on the loopback interface is just for debugging. It's
|
|
* used only for loopback interfaces, not for a simplex interface.
|
|
*/
|
|
if ((ALTQ_IS_ENABLED(&ifp->if_snd) || TBR_IS_ENABLED(&ifp->if_snd)) &&
|
|
ifp->if_start == lostart) {
|
|
struct altq_pktattr pktattr;
|
|
int error;
|
|
|
|
/*
|
|
* If the queueing discipline needs packet classification,
|
|
* do it before prepending the link headers.
|
|
*/
|
|
IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
|
|
|
|
M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
*(mtod(m, uint32_t *)) = dst->sa_family;
|
|
|
|
s = splnet();
|
|
IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
|
|
(*ifp->if_start)(ifp);
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
#endif /* ALTQ */
|
|
|
|
m_tag_delete_nonpersistent(m);
|
|
|
|
switch (dst->sa_family) {
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
ifq = &ipintrq;
|
|
isr = NETISR_IP;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
m->m_flags |= M_LOOP;
|
|
ifq = &ip6intrq;
|
|
isr = NETISR_IPV6;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case AF_NS:
|
|
ifq = &nsintrq;
|
|
isr = NETISR_NS;
|
|
break;
|
|
#endif
|
|
#ifdef ISO
|
|
case AF_ISO:
|
|
ifq = &clnlintrq;
|
|
isr = NETISR_ISO;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case AF_IPX:
|
|
ifq = &ipxintrq;
|
|
isr = NETISR_IPX;
|
|
break;
|
|
#endif
|
|
#ifdef NETATALK
|
|
case AF_APPLETALK:
|
|
ifq = &atintrq2;
|
|
isr = NETISR_ATALK;
|
|
break;
|
|
#endif
|
|
default:
|
|
printf("%s: can't handle af%d\n", ifp->if_xname,
|
|
dst->sa_family);
|
|
m_freem(m);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
s = splnet();
|
|
if (IF_QFULL(ifq)) {
|
|
IF_DROP(ifq);
|
|
m_freem(m);
|
|
splx(s);
|
|
return (ENOBUFS);
|
|
}
|
|
IF_ENQUEUE(ifq, m);
|
|
schednetisr(isr);
|
|
ifp->if_ipackets++;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
|
|
#ifdef ALTQ
|
|
void
|
|
lostart(struct ifnet *ifp)
|
|
{
|
|
struct ifqueue *ifq;
|
|
struct mbuf *m;
|
|
uint32_t af;
|
|
int s, isr;
|
|
|
|
for (;;) {
|
|
IFQ_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == NULL)
|
|
return;
|
|
|
|
af = *(mtod(m, uint32_t *));
|
|
m_adj(m, sizeof(uint32_t));
|
|
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
ifq = &ipintrq;
|
|
isr = NETISR_IP;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
m->m_flags |= M_LOOP;
|
|
ifq = &ip6intrq;
|
|
isr = NETISR_IPV6;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case AF_IPX:
|
|
ifq = &ipxintrq;
|
|
isr = NETISR_IPX;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case AF_NS:
|
|
ifq = &nsintrq;
|
|
isr = NETISR_NS;
|
|
break;
|
|
#endif
|
|
#ifdef ISO
|
|
case AF_ISO:
|
|
ifq = &clnlintrq;
|
|
isr = NETISR_ISO;
|
|
break;
|
|
#endif
|
|
#ifdef NETATALK
|
|
case AF_APPLETALK:
|
|
ifq = &atintrq2;
|
|
isr = NETISR_ATALK;
|
|
break;
|
|
#endif
|
|
default:
|
|
printf("%s: can't handle af%d\n", ifp->if_xname, af);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
s = splnet();
|
|
if (IF_QFULL(ifq)) {
|
|
IF_DROP(ifq);
|
|
splx(s);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
IF_ENQUEUE(ifq, m);
|
|
schednetisr(isr);
|
|
ifp->if_ipackets++;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
splx(s);
|
|
}
|
|
}
|
|
#endif /* ALTQ */
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
lortrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
|
|
{
|
|
|
|
if (rt)
|
|
rt->rt_rmx.rmx_mtu = lo0ifp->if_mtu;
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
loioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct ifreq *ifr;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
ifa = (struct ifaddr *)data;
|
|
if (ifa != NULL /*&& ifa->ifa_addr->sa_family == AF_ISO*/)
|
|
ifa->ifa_rtrequest = lortrequest;
|
|
/*
|
|
* Everything else is done at a higher level.
|
|
*/
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
ifr = (struct ifreq *)data;
|
|
if ((unsigned)ifr->ifr_mtu > LOMTU_MAX)
|
|
error = EINVAL;
|
|
else {
|
|
/* XXX update rt mtu for AF_ISO? */
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
}
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
ifr = (struct ifreq *)data;
|
|
if (ifr == NULL) {
|
|
error = EAFNOSUPPORT; /* XXX */
|
|
break;
|
|
}
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
return (error);
|
|
}
|