10fe49d72c
#if NBPFILTER is no longer required in the client. This change doesn't yet add support for loading bpf as a module, since drivers can register before bpf is attached. However, callers of bpf can now be modularized. Dynamically loadable bpf could probably be done fairly easily with coordination from the stub driver and the real driver by registering attachments in the stub before the real driver is loaded and doing a handoff. ... and I'm not going to ponder the depths of unload here. Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.
298 lines
6.7 KiB
C
298 lines
6.7 KiB
C
/* $NetBSD: if_faith.c,v 1.46 2010/01/19 22:08:00 pooka Exp $ */
|
|
/* $KAME: if_faith.c,v 1.21 2001/02/20 07:59:26 itojun Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
/*
|
|
* derived from
|
|
* @(#)if_loop.c 8.1 (Berkeley) 6/10/93
|
|
* Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
|
|
*/
|
|
|
|
/*
|
|
* IPv6-to-IPv4 TCP relay capturing interface
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: if_faith.c,v 1.46 2010/01/19 22:08:00 pooka Exp $");
|
|
|
|
#include "opt_inet.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 <sys/queue.h>
|
|
|
|
#include <sys/cpu.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/netisr.h>
|
|
#include <net/route.h>
|
|
#include <net/bpf.h>
|
|
#include <net/if_faith.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>
|
|
#include <netinet6/ip6_var.h>
|
|
#endif
|
|
|
|
|
|
#include <net/net_osdep.h>
|
|
|
|
static int faithioctl(struct ifnet *, u_long, void *);
|
|
static int faithoutput(struct ifnet *, struct mbuf *,
|
|
const struct sockaddr *, struct rtentry *);
|
|
static void faithrtrequest(int, struct rtentry *,
|
|
const struct rt_addrinfo *);
|
|
|
|
void faithattach(int);
|
|
|
|
static int faith_clone_create(struct if_clone *, int);
|
|
static int faith_clone_destroy(struct ifnet *);
|
|
|
|
static struct if_clone faith_cloner =
|
|
IF_CLONE_INITIALIZER("faith", faith_clone_create, faith_clone_destroy);
|
|
|
|
#define FAITHMTU 1500
|
|
|
|
/* ARGSUSED */
|
|
void
|
|
faithattach(int count)
|
|
{
|
|
|
|
if_clone_attach(&faith_cloner);
|
|
}
|
|
|
|
static int
|
|
faith_clone_create(struct if_clone *ifc, int unit)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
ifp = if_alloc(IFT_FAITH);
|
|
|
|
if_initname(ifp, ifc->ifc_name, unit);
|
|
|
|
ifp->if_mtu = FAITHMTU;
|
|
/* Change to BROADCAST experimentaly to announce its prefix. */
|
|
ifp->if_flags = /* IFF_LOOPBACK */ IFF_BROADCAST | IFF_MULTICAST;
|
|
ifp->if_ioctl = faithioctl;
|
|
ifp->if_output = faithoutput;
|
|
ifp->if_type = IFT_FAITH;
|
|
ifp->if_hdrlen = 0;
|
|
ifp->if_addrlen = 0;
|
|
ifp->if_dlt = DLT_NULL;
|
|
if_attach(ifp);
|
|
if_alloc_sadl(ifp);
|
|
bpf_ops->bpf_attach(ifp, DLT_NULL, sizeof(u_int), &ifp->if_bpf);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
faith_clone_destroy(struct ifnet *ifp)
|
|
{
|
|
|
|
bpf_ops->bpf_detach(ifp);
|
|
if_detach(ifp);
|
|
free(ifp, M_DEVBUF);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
faithoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
|
|
struct rtentry *rt)
|
|
{
|
|
int s, isr;
|
|
uint32_t af;
|
|
struct ifqueue *ifq = 0;
|
|
|
|
if ((m->m_flags & M_PKTHDR) == 0)
|
|
panic("faithoutput no HDR");
|
|
af = dst->sa_family;
|
|
/* BPF write needs to be handled specially */
|
|
if (af == AF_UNSPEC) {
|
|
af = *(mtod(m, int *));
|
|
m_adj(m, sizeof(int));
|
|
}
|
|
|
|
if (ifp->if_bpf)
|
|
bpf_ops->bpf_mtap_af(ifp->if_bpf, af, m);
|
|
|
|
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;
|
|
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
|
|
default:
|
|
m_freem(m);
|
|
return EAFNOSUPPORT;
|
|
}
|
|
|
|
/* XXX do we need more sanity checks? */
|
|
|
|
m->m_pkthdr.rcvif = ifp;
|
|
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);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
faithrtrequest(int cmd, struct rtentry *rt,
|
|
const struct rt_addrinfo *info)
|
|
{
|
|
if (rt)
|
|
rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
faithioctl(struct ifnet *ifp, u_long cmd, void *data)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCINITIFADDR:
|
|
ifp->if_flags |= IFF_UP | IFF_RUNNING;
|
|
ifa = (struct ifaddr *)data;
|
|
ifa->ifa_rtrequest = faithrtrequest;
|
|
/*
|
|
* Everything else is done at a higher level.
|
|
*/
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (ifr == 0) {
|
|
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:
|
|
if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET)
|
|
error = 0;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#ifdef INET6
|
|
/*
|
|
* XXX could be slow
|
|
* XXX could be layer violation to call sys/net from sys/netinet6
|
|
*/
|
|
int
|
|
faithprefix(struct in6_addr *in6)
|
|
{
|
|
struct rtentry *rt;
|
|
struct sockaddr_in6 sin6;
|
|
int ret;
|
|
|
|
if (ip6_keepfaith == 0)
|
|
return 0;
|
|
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_addr = *in6;
|
|
rt = rtalloc1((struct sockaddr *)&sin6, 0);
|
|
if (rt && rt->rt_ifp && rt->rt_ifp->if_type == IFT_FAITH &&
|
|
(rt->rt_ifp->if_flags & IFF_UP) != 0)
|
|
ret = 1;
|
|
else
|
|
ret = 0;
|
|
if (rt)
|
|
RTFREE(rt);
|
|
return ret;
|
|
}
|
|
#endif
|