993 lines
20 KiB
C
993 lines
20 KiB
C
/* $NetBSD: if_gif.c,v 1.46 2004/08/19 20:58:24 christos Exp $ */
|
|
/* $KAME: if_gif.c,v 1.76 2001/08/20 02:01:02 kjc 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: if_gif.c,v 1.46 2004/08/19 20:58:24 christos Exp $");
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_iso.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/time.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/protosw.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/netisr.h>
|
|
#include <net/route.h>
|
|
#include <net/bpf.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#ifdef INET
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/in_gif.h>
|
|
#endif /* INET */
|
|
|
|
#ifdef INET6
|
|
#ifndef INET
|
|
#include <netinet/in.h>
|
|
#endif
|
|
#include <netinet6/in6_var.h>
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet6/in6_gif.h>
|
|
#include <netinet6/ip6protosw.h>
|
|
#endif /* INET6 */
|
|
|
|
#ifdef ISO
|
|
#include <netiso/iso.h>
|
|
#include <netiso/iso_var.h>
|
|
#endif
|
|
|
|
#include <netinet/ip_encap.h>
|
|
#include <net/if_gif.h>
|
|
|
|
#include "bpfilter.h"
|
|
|
|
#include <net/net_osdep.h>
|
|
|
|
void gifattach __P((int));
|
|
#ifndef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
void gifnetisr __P((void));
|
|
#endif
|
|
void gifintr __P((void *));
|
|
#ifdef ISO
|
|
static struct mbuf *gif_eon_encap __P((struct mbuf *));
|
|
static struct mbuf *gif_eon_decap __P((struct ifnet *, struct mbuf *));
|
|
#endif
|
|
|
|
/*
|
|
* gif global variable definitions
|
|
*/
|
|
LIST_HEAD(, gif_softc) gif_softc_list;
|
|
|
|
int gif_clone_create __P((struct if_clone *, int));
|
|
void gif_clone_destroy __P((struct ifnet *));
|
|
|
|
struct if_clone gif_cloner =
|
|
IF_CLONE_INITIALIZER("gif", gif_clone_create, gif_clone_destroy);
|
|
|
|
#ifndef MAX_GIF_NEST
|
|
/*
|
|
* This macro controls the upper limitation on nesting of gif tunnels.
|
|
* Since, setting a large value to this macro with a careless configuration
|
|
* may introduce system crash, we don't allow any nestings by default.
|
|
* If you need to configure nested gif tunnels, you can define this macro
|
|
* in your kernel configuration file. However, if you do so, please be
|
|
* careful to configure the tunnels so that it won't make a loop.
|
|
*/
|
|
#define MAX_GIF_NEST 1
|
|
#endif
|
|
static int max_gif_nesting = MAX_GIF_NEST;
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
gifattach(count)
|
|
int count;
|
|
{
|
|
|
|
LIST_INIT(&gif_softc_list);
|
|
if_clone_attach(&gif_cloner);
|
|
}
|
|
|
|
int
|
|
gif_clone_create(ifc, unit)
|
|
struct if_clone *ifc;
|
|
int unit;
|
|
{
|
|
struct gif_softc *sc;
|
|
|
|
sc = malloc(sizeof(struct gif_softc), M_DEVBUF, M_WAIT);
|
|
memset(sc, 0, sizeof(struct gif_softc));
|
|
|
|
snprintf(sc->gif_if.if_xname, sizeof(sc->gif_if.if_xname), "%s%d",
|
|
ifc->ifc_name, unit);
|
|
|
|
gifattach0(sc);
|
|
|
|
LIST_INSERT_HEAD(&gif_softc_list, sc, gif_list);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
gifattach0(sc)
|
|
struct gif_softc *sc;
|
|
{
|
|
|
|
sc->encap_cookie4 = sc->encap_cookie6 = NULL;
|
|
|
|
sc->gif_if.if_addrlen = 0;
|
|
sc->gif_if.if_mtu = GIF_MTU;
|
|
sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
|
|
sc->gif_if.if_ioctl = gif_ioctl;
|
|
sc->gif_if.if_output = gif_output;
|
|
sc->gif_if.if_type = IFT_GIF;
|
|
sc->gif_if.if_dlt = DLT_NULL;
|
|
IFQ_SET_READY(&sc->gif_if.if_snd);
|
|
if_attach(&sc->gif_if);
|
|
if_alloc_sadl(&sc->gif_if);
|
|
#if NBPFILTER > 0
|
|
bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int));
|
|
#endif
|
|
}
|
|
|
|
void
|
|
gif_clone_destroy(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct gif_softc *sc = (void *) ifp;
|
|
|
|
gif_delete_tunnel(&sc->gif_if);
|
|
LIST_REMOVE(sc, gif_list);
|
|
#ifdef INET6
|
|
encap_detach(sc->encap_cookie6);
|
|
#endif
|
|
#ifdef INET
|
|
encap_detach(sc->encap_cookie4);
|
|
#endif
|
|
|
|
#if NBPFILTER > 0
|
|
bpfdetach(ifp);
|
|
#endif
|
|
if_detach(ifp);
|
|
|
|
free(sc, M_DEVBUF);
|
|
}
|
|
|
|
#ifdef GIF_ENCAPCHECK
|
|
int
|
|
gif_encapcheck(m, off, proto, arg)
|
|
const struct mbuf *m;
|
|
int off;
|
|
int proto;
|
|
void *arg;
|
|
{
|
|
struct ip ip;
|
|
struct gif_softc *sc;
|
|
|
|
sc = (struct gif_softc *)arg;
|
|
if (sc == NULL)
|
|
return 0;
|
|
|
|
if ((sc->gif_if.if_flags & IFF_UP) == 0)
|
|
return 0;
|
|
|
|
/* no physical address */
|
|
if (!sc->gif_psrc || !sc->gif_pdst)
|
|
return 0;
|
|
|
|
switch (proto) {
|
|
#ifdef INET
|
|
case IPPROTO_IPV4:
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case IPPROTO_IPV6:
|
|
break;
|
|
#endif
|
|
#ifdef ISO
|
|
case IPPROTO_EON:
|
|
break;
|
|
#endif
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
/* Bail on short packets */
|
|
KASSERT(m->m_flags & M_PKTHDR);
|
|
if (m->m_pkthdr.len < sizeof(ip))
|
|
return 0;
|
|
|
|
/* LINTED const cast */
|
|
m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip);
|
|
|
|
switch (ip.ip_v) {
|
|
#ifdef INET
|
|
case 4:
|
|
if (sc->gif_psrc->sa_family != AF_INET ||
|
|
sc->gif_pdst->sa_family != AF_INET)
|
|
return 0;
|
|
return gif_encapcheck4(m, off, proto, arg);
|
|
#endif
|
|
#ifdef INET6
|
|
case 6:
|
|
if (m->m_pkthdr.len < sizeof(struct ip6_hdr))
|
|
return 0;
|
|
if (sc->gif_psrc->sa_family != AF_INET6 ||
|
|
sc->gif_pdst->sa_family != AF_INET6)
|
|
return 0;
|
|
return gif_encapcheck6(m, off, proto, arg);
|
|
#endif
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int
|
|
gif_output(ifp, m, dst, rt)
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
struct sockaddr *dst;
|
|
struct rtentry *rt; /* added in net2 */
|
|
{
|
|
struct gif_softc *sc = (struct gif_softc*)ifp;
|
|
int error = 0;
|
|
static int called = 0; /* XXX: MUTEX */
|
|
ALTQ_DECL(struct altq_pktattr pktattr;)
|
|
int s;
|
|
|
|
IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
|
|
|
|
/*
|
|
* gif may cause infinite recursion calls when misconfigured.
|
|
* We'll prevent this by introducing upper limit.
|
|
* XXX: this mechanism may introduce another problem about
|
|
* mutual exclusion of the variable CALLED, especially if we
|
|
* use kernel thread.
|
|
*/
|
|
if (++called > max_gif_nesting) {
|
|
log(LOG_NOTICE,
|
|
"gif_output: recursively called too many times(%d)\n",
|
|
called);
|
|
m_freem(m);
|
|
error = EIO; /* is there better errno? */
|
|
goto end;
|
|
}
|
|
|
|
m->m_flags &= ~(M_BCAST|M_MCAST);
|
|
if (!(ifp->if_flags & IFF_UP) ||
|
|
sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
|
|
m_freem(m);
|
|
error = ENETDOWN;
|
|
goto end;
|
|
}
|
|
|
|
/* inner AF-specific encapsulation */
|
|
switch (dst->sa_family) {
|
|
#ifdef ISO
|
|
case AF_ISO:
|
|
m = gif_eon_encap(m);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto end;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* XXX should we check if our outer source is legal? */
|
|
|
|
/* use DLT_NULL encapsulation here to pass inner af type */
|
|
M_PREPEND(m, sizeof(int), M_DONTWAIT);
|
|
if (!m) {
|
|
error = ENOBUFS;
|
|
goto end;
|
|
}
|
|
*mtod(m, int *) = dst->sa_family;
|
|
|
|
s = splnet();
|
|
IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
|
|
if (error) {
|
|
splx(s);
|
|
goto end;
|
|
}
|
|
splx(s);
|
|
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
softintr_schedule(sc->gif_si);
|
|
#else
|
|
/* XXX bad spl level? */
|
|
gifnetisr();
|
|
#endif
|
|
error = 0;
|
|
|
|
end:
|
|
called = 0; /* reset recursion counter */
|
|
if (error)
|
|
ifp->if_oerrors++;
|
|
return error;
|
|
}
|
|
|
|
#ifndef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
void
|
|
gifnetisr()
|
|
{
|
|
struct gif_softc *sc;
|
|
|
|
for (sc = LIST_FIRST(&gif_softc_list); sc != NULL;
|
|
sc = LIST_NEXT(sc, gif_list)) {
|
|
gifintr(sc);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
gifintr(arg)
|
|
void *arg;
|
|
{
|
|
struct gif_softc *sc;
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
int family;
|
|
int len;
|
|
int s;
|
|
int error;
|
|
|
|
sc = (struct gif_softc *)arg;
|
|
ifp = &sc->gif_if;
|
|
|
|
/* output processing */
|
|
while (1) {
|
|
s = splnet();
|
|
IFQ_DEQUEUE(&sc->gif_if.if_snd, m);
|
|
splx(s);
|
|
if (m == NULL)
|
|
break;
|
|
|
|
/* grab and chop off inner af type */
|
|
if (sizeof(int) > m->m_len) {
|
|
m = m_pullup(m, sizeof(int));
|
|
if (!m) {
|
|
ifp->if_oerrors++;
|
|
continue;
|
|
}
|
|
}
|
|
family = *mtod(m, int *);
|
|
#if NBPFILTER > 0
|
|
if (ifp->if_bpf)
|
|
bpf_mtap(ifp->if_bpf, m);
|
|
#endif
|
|
m_adj(m, sizeof(int));
|
|
|
|
len = m->m_pkthdr.len;
|
|
|
|
/* dispatch to output logic based on outer AF */
|
|
switch (sc->gif_psrc->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
error = in_gif_output(ifp, family, m);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
error = in6_gif_output(ifp, family, m);
|
|
break;
|
|
#endif
|
|
default:
|
|
m_freem(m);
|
|
error = ENETDOWN;
|
|
break;
|
|
}
|
|
|
|
if (error)
|
|
ifp->if_oerrors++;
|
|
else {
|
|
ifp->if_opackets++;
|
|
ifp->if_obytes += len;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gif_input(m, af, ifp)
|
|
struct mbuf *m;
|
|
int af;
|
|
struct ifnet *ifp;
|
|
{
|
|
int s, isr;
|
|
struct ifqueue *ifq = NULL;
|
|
|
|
if (ifp == NULL) {
|
|
/* just in case */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
#if NBPFILTER > 0
|
|
if (ifp->if_bpf)
|
|
bpf_mtap_af(ifp->if_bpf, af, m);
|
|
#endif /*NBPFILTER > 0*/
|
|
|
|
/*
|
|
* Put the packet to the network layer input queue according to the
|
|
* specified address family.
|
|
* Note: older versions of gif_input directly called network layer
|
|
* input functions, e.g. ip6_input, here. We changed the policy to
|
|
* prevent too many recursive calls of such input functions, which
|
|
* might cause kernel panic. But the change may introduce another
|
|
* problem; if the input queue is full, packets are discarded.
|
|
* The kernel stack overflow really happened, and we believed
|
|
* queue-full rarely occurs, so we changed the policy.
|
|
*/
|
|
switch (af) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
ifq = &ipintrq;
|
|
isr = NETISR_IP;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
ifq = &ip6intrq;
|
|
isr = NETISR_IPV6;
|
|
break;
|
|
#endif
|
|
#ifdef ISO
|
|
case AF_ISO:
|
|
m = gif_eon_decap(ifp, m);
|
|
if (!m)
|
|
return;
|
|
ifq = &clnlintrq;
|
|
isr = NETISR_ISO;
|
|
break;
|
|
#endif
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
s = splnet();
|
|
if (IF_QFULL(ifq)) {
|
|
IF_DROP(ifq); /* update statistics */
|
|
m_freem(m);
|
|
splx(s);
|
|
return;
|
|
}
|
|
ifp->if_ipackets++;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
IF_ENQUEUE(ifq, m);
|
|
/* we need schednetisr since the address family may change */
|
|
schednetisr(isr);
|
|
splx(s);
|
|
}
|
|
|
|
/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */
|
|
int
|
|
gif_ioctl(ifp, cmd, data)
|
|
struct ifnet *ifp;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct proc *p = curproc; /* XXX */
|
|
struct gif_softc *sc = (struct gif_softc*)ifp;
|
|
struct ifreq *ifr = (struct ifreq*)data;
|
|
int error = 0, size;
|
|
struct sockaddr *dst, *src;
|
|
#ifdef SIOCSIFMTU
|
|
u_long mtu;
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
break;
|
|
|
|
case SIOCSIFDSTADDR:
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
break;
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
#ifdef INET
|
|
case AF_INET: /* IP supports Multicast */
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case AF_INET6: /* IP6 supports Multicast */
|
|
break;
|
|
#endif /* INET6 */
|
|
default: /* Other protocols doesn't support Multicast */
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
#ifdef SIOCSIFMTU /* xxx */
|
|
case SIOCGIFMTU:
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
break;
|
|
mtu = ifr->ifr_mtu;
|
|
if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX)
|
|
return (EINVAL);
|
|
ifp->if_mtu = mtu;
|
|
break;
|
|
#endif /* SIOCSIFMTU */
|
|
|
|
#ifdef INET
|
|
case SIOCSIFPHYADDR:
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
#endif /* INET6 */
|
|
case SIOCSLIFPHYADDR:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
break;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCSIFPHYADDR:
|
|
src = (struct sockaddr *)
|
|
&(((struct in_aliasreq *)data)->ifra_addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct in_aliasreq *)data)->ifra_dstaddr);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
src = (struct sockaddr *)
|
|
&(((struct in6_aliasreq *)data)->ifra_addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_aliasreq *)data)->ifra_dstaddr);
|
|
break;
|
|
#endif
|
|
case SIOCSLIFPHYADDR:
|
|
src = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->addr);
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->dstaddr);
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
/* sa_family must be equal */
|
|
if (src->sa_family != dst->sa_family)
|
|
return EINVAL;
|
|
|
|
/* validate sa_len */
|
|
switch (src->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (src->sa_len != sizeof(struct sockaddr_in))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (src->sa_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (dst->sa_len != sizeof(struct sockaddr_in))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (dst->sa_len != sizeof(struct sockaddr_in6))
|
|
return EINVAL;
|
|
break;
|
|
#endif
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
|
|
/* check sa_family looks sane for the cmd */
|
|
switch (cmd) {
|
|
case SIOCSIFPHYADDR:
|
|
if (src->sa_family == AF_INET)
|
|
break;
|
|
return EAFNOSUPPORT;
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
if (src->sa_family == AF_INET6)
|
|
break;
|
|
return EAFNOSUPPORT;
|
|
#endif /* INET6 */
|
|
case SIOCSLIFPHYADDR:
|
|
/* checks done in the above */
|
|
break;
|
|
}
|
|
|
|
error = gif_set_tunnel(&sc->gif_if, src, dst);
|
|
break;
|
|
|
|
#ifdef SIOCDIFPHYADDR
|
|
case SIOCDIFPHYADDR:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
break;
|
|
gif_delete_tunnel(&sc->gif_if);
|
|
break;
|
|
#endif
|
|
|
|
case SIOCGIFPSRCADDR:
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
#endif /* INET6 */
|
|
if (sc->gif_psrc == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
src = sc->gif_psrc;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPSRCADDR:
|
|
dst = &ifr->ifr_addr;
|
|
size = sizeof(ifr->ifr_addr);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case SIOCGIFPSRCADDR_IN6:
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_ifreq *)data)->ifr_addr);
|
|
size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
break;
|
|
|
|
case SIOCGIFPDSTADDR:
|
|
#ifdef INET6
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
#endif /* INET6 */
|
|
if (sc->gif_pdst == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
src = sc->gif_pdst;
|
|
switch (cmd) {
|
|
#ifdef INET
|
|
case SIOCGIFPDSTADDR:
|
|
dst = &ifr->ifr_addr;
|
|
size = sizeof(ifr->ifr_addr);
|
|
break;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
case SIOCGIFPDSTADDR_IN6:
|
|
dst = (struct sockaddr *)
|
|
&(((struct in6_ifreq *)data)->ifr_addr);
|
|
size = sizeof(((struct in6_ifreq *)data)->ifr_addr);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
break;
|
|
|
|
case SIOCGLIFPHYADDR:
|
|
if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
|
|
/* copy src */
|
|
src = sc->gif_psrc;
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->addr);
|
|
size = sizeof(((struct if_laddrreq *)data)->addr);
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
|
|
/* copy dst */
|
|
src = sc->gif_pdst;
|
|
dst = (struct sockaddr *)
|
|
&(((struct if_laddrreq *)data)->dstaddr);
|
|
size = sizeof(((struct if_laddrreq *)data)->dstaddr);
|
|
if (src->sa_len > size)
|
|
return EINVAL;
|
|
bcopy((caddr_t)src, (caddr_t)dst, src->sa_len);
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
/* if_ioctl() takes care of it */
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
bad:
|
|
return error;
|
|
}
|
|
|
|
int
|
|
gif_set_tunnel(ifp, src, dst)
|
|
struct ifnet *ifp;
|
|
struct sockaddr *src;
|
|
struct sockaddr *dst;
|
|
{
|
|
struct gif_softc *sc = (struct gif_softc *)ifp;
|
|
struct gif_softc *sc2;
|
|
struct sockaddr *osrc, *odst, *sa;
|
|
int s;
|
|
int error;
|
|
|
|
s = splsoftnet();
|
|
|
|
for (sc2 = LIST_FIRST(&gif_softc_list); sc2 != NULL;
|
|
sc2 = LIST_NEXT(sc2, gif_list)) {
|
|
if (sc2 == sc)
|
|
continue;
|
|
if (!sc2->gif_pdst || !sc2->gif_psrc)
|
|
continue;
|
|
if (sc2->gif_pdst->sa_family != dst->sa_family ||
|
|
sc2->gif_pdst->sa_len != dst->sa_len ||
|
|
sc2->gif_psrc->sa_family != src->sa_family ||
|
|
sc2->gif_psrc->sa_len != src->sa_len)
|
|
continue;
|
|
/* can't configure same pair of address onto two gifs */
|
|
if (bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 &&
|
|
bcmp(sc2->gif_psrc, src, src->sa_len) == 0) {
|
|
error = EADDRNOTAVAIL;
|
|
goto bad;
|
|
}
|
|
|
|
/* XXX both end must be valid? (I mean, not 0.0.0.0) */
|
|
}
|
|
|
|
/* XXX we can detach from both, but be polite just in case */
|
|
if (sc->gif_psrc)
|
|
switch (sc->gif_psrc->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
(void)in_gif_detach(sc);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
(void)in6_gif_detach(sc);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
sc->gif_si = softintr_establish(IPL_SOFTNET, gifintr, sc);
|
|
if (sc->gif_si == NULL) {
|
|
error = ENOMEM;
|
|
goto bad;
|
|
}
|
|
#endif
|
|
|
|
osrc = sc->gif_psrc;
|
|
sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK);
|
|
bcopy((caddr_t)src, (caddr_t)sa, src->sa_len);
|
|
sc->gif_psrc = sa;
|
|
|
|
odst = sc->gif_pdst;
|
|
sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK);
|
|
bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len);
|
|
sc->gif_pdst = sa;
|
|
|
|
switch (sc->gif_psrc->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
error = in_gif_attach(sc);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
error = in6_gif_attach(sc);
|
|
break;
|
|
#endif
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (error) {
|
|
/* rollback */
|
|
free((caddr_t)sc->gif_psrc, M_IFADDR);
|
|
free((caddr_t)sc->gif_pdst, M_IFADDR);
|
|
sc->gif_psrc = osrc;
|
|
sc->gif_pdst = odst;
|
|
goto bad;
|
|
}
|
|
|
|
if (osrc)
|
|
free((caddr_t)osrc, M_IFADDR);
|
|
if (odst)
|
|
free((caddr_t)odst, M_IFADDR);
|
|
|
|
if (sc->gif_psrc && sc->gif_pdst)
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
else
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
splx(s);
|
|
|
|
return 0;
|
|
|
|
bad:
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
if (sc->gif_si) {
|
|
softintr_disestablish(sc->gif_si);
|
|
sc->gif_si = NULL;
|
|
}
|
|
#endif
|
|
if (sc->gif_psrc && sc->gif_pdst)
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
else
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
splx(s);
|
|
|
|
return error;
|
|
}
|
|
|
|
void
|
|
gif_delete_tunnel(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct gif_softc *sc = (struct gif_softc *)ifp;
|
|
int s;
|
|
|
|
s = splsoftnet();
|
|
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
if (sc->gif_si) {
|
|
softintr_disestablish(sc->gif_si);
|
|
sc->gif_si = NULL;
|
|
}
|
|
#endif
|
|
if (sc->gif_psrc) {
|
|
free((caddr_t)sc->gif_psrc, M_IFADDR);
|
|
sc->gif_psrc = NULL;
|
|
}
|
|
if (sc->gif_pdst) {
|
|
free((caddr_t)sc->gif_pdst, M_IFADDR);
|
|
sc->gif_pdst = NULL;
|
|
}
|
|
/* it is safe to detach from both */
|
|
#ifdef INET
|
|
(void)in_gif_detach(sc);
|
|
#endif
|
|
#ifdef INET6
|
|
(void)in6_gif_detach(sc);
|
|
#endif
|
|
|
|
if (sc->gif_psrc && sc->gif_pdst)
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
else
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
splx(s);
|
|
}
|
|
|
|
#ifdef ISO
|
|
struct eonhdr {
|
|
u_int8_t version;
|
|
u_int8_t class;
|
|
u_int16_t cksum;
|
|
};
|
|
|
|
/*
|
|
* prepend EON header to ISO PDU
|
|
*/
|
|
static struct mbuf *
|
|
gif_eon_encap(struct mbuf *m)
|
|
{
|
|
struct eonhdr *ehdr;
|
|
|
|
M_PREPEND(m, sizeof(*ehdr), M_DONTWAIT);
|
|
if (m && m->m_len < sizeof(*ehdr))
|
|
m = m_pullup(m, sizeof(*ehdr));
|
|
if (m == NULL)
|
|
return NULL;
|
|
ehdr = mtod(m, struct eonhdr *);
|
|
ehdr->version = 1;
|
|
ehdr->class = 0; /* always unicast */
|
|
#if 0
|
|
/* calculate the checksum of the eonhdr */
|
|
{
|
|
struct mbuf mhead;
|
|
memset(&mhead, 0, sizeof(mhead));
|
|
ehdr->cksum = 0;
|
|
mhead.m_data = (caddr_t)ehdr;
|
|
mhead.m_len = sizeof(*ehdr);
|
|
mhead.m_next = 0;
|
|
iso_gen_csum(&mhead, offsetof(struct eonhdr, cksum),
|
|
mhead.m_len);
|
|
}
|
|
#else
|
|
/* since the data is always constant we'll just plug the value in */
|
|
ehdr->cksum = htons(0xfc02);
|
|
#endif
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* remove EON header and check checksum
|
|
*/
|
|
static struct mbuf *
|
|
gif_eon_decap(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct eonhdr *ehdr;
|
|
|
|
if (m->m_len < sizeof(*ehdr) &&
|
|
(m = m_pullup(m, sizeof(*ehdr))) == NULL) {
|
|
ifp->if_ierrors++;
|
|
return NULL;
|
|
}
|
|
if (iso_check_csum(m, sizeof(struct eonhdr))) {
|
|
m_freem(m);
|
|
return NULL;
|
|
}
|
|
m_adj(m, sizeof(*ehdr));
|
|
return m;
|
|
}
|
|
#endif /*ISO*/
|