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Make faith loadable, unloadable, and clonable.

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This commit is contained in:
Brooks Davis 2001-09-25 18:40:52 +00:00
parent 0ec8be8404
commit 9494d5968f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=83934
18 changed files with 174 additions and 157 deletions
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2
share/man/man4/faith.4
View File

@ -36,7 +36,7 @@
.Nm faith
.Nd IPv6-to-IPv4 TCP relay capturing interface
.Sh SYNOPSIS
.Cd "device faith" Op Ar count
.Cd "device faith"
.Sh DESCRIPTION
The
.Nm

2
sys/conf/files
View File

@ -903,7 +903,7 @@ net/if_atmsubr.c optional atm
net/if_disc.c optional disc
net/if_ef.c optional ef
net/if_ethersubr.c optional ether
net/if_faith.c count faith
net/if_faith.c optional faith
net/if_fddisubr.c optional fddi
net/if_gif.c optional gif
net/if_iso88025subr.c optional token

1
sys/modules/Makefile
View File

@ -28,6 +28,7 @@ SUBDIR= 3dfx \
if_disc \
if_ef \
if_gif \
if_faith \
if_ppp \
if_sl \
if_stf \

15
sys/modules/if_faith/Makefile Normal file
View File

@ -0,0 +1,15 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../../net
KMOD= if_faith
SRCS= if_faith.c opt_inet.h opt_inet6.h
NOMAN=
opt_inet.h:
echo "#define INET 1" > ${.TARGET}
opt_inet6.h:
echo "#define INET6 1" > ${.TARGET}
.include <bsd.kmod.mk>

185
sys/net/if_faith.c
View File

@ -46,9 +46,6 @@
#include "opt_inet.h"
#include "opt_inet6.h"
#include "faith.h"
#if NFAITH > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
@ -58,13 +55,16 @@
#include <sys/sockio.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <machine/bus.h> /* XXX: Shouldn't really be required! */
#include <sys/rman.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>
@ -82,54 +82,157 @@
#include <netinet6/ip6_var.h>
#endif
#include "bpf.h"
#define NBPFILTER NBPF
#include <net/net_osdep.h>
#define FAITHNAME "faith"
#define FAITH_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */
struct faith_softc {
struct ifnet sc_if; /* must be first */
struct resource *r_unit;
LIST_ENTRY(faith_softc) sc_list;
};
static int faithioctl __P((struct ifnet *, u_long, caddr_t));
int faithoutput __P((struct ifnet *, struct mbuf *, struct sockaddr *,
struct rtentry *));
static void faithrtrequest __P((int, struct rtentry *, struct sockaddr *));
static int faithprefix __P((struct in6_addr *));
void faithattach __P((void *));
PSEUDO_SET(faithattach, if_faith);
static int faithmodevent __P((module_t, int, void *));
static struct ifnet faithif[NFAITH];
static MALLOC_DEFINE(M_FAITH, FAITHNAME, "Firewall Assisted Tunnel Interface");
static struct rman faithunits[1];
LIST_HEAD(, faith_softc) faith_softc_list;
int faith_clone_create __P((struct if_clone *, int *));
void faith_clone_destroy __P((struct ifnet *));
struct if_clone faith_cloner =
IF_CLONE_INITIALIZER(FAITHNAME, faith_clone_create, faith_clone_destroy);
#define FAITHMTU 1500
/* ARGSUSED */
void
faithattach(faith)
void *faith;
static int
faithmodevent(mod, type, data)
module_t mod;
int type;
void *data;
{
struct ifnet *ifp;
int i;
int err;
for (i = 0; i < NFAITH; i++) {
ifp = &faithif[i];
bzero(ifp, sizeof(faithif[i]));
ifp->if_name = "faith";
ifp->if_unit = i;
ifp->if_mtu = FAITHMTU;
/* LOOPBACK commented out to announce IPv6 routes to faith */
ifp->if_flags = /* IFF_LOOPBACK | */ IFF_MULTICAST;
ifp->if_ioctl = faithioctl;
ifp->if_output = faithoutput;
ifp->if_type = IFT_FAITH;
ifp->if_snd.ifq_maxlen = ifqmaxlen;
ifp->if_hdrlen = 0;
ifp->if_addrlen = 0;
if_attach(ifp);
#if NBPFILTER > 0
#ifdef HAVE_OLD_BPF
bpfattach(ifp, DLT_NULL, sizeof(u_int));
#else
bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
switch (type) {
case MOD_LOAD:
faithunits->rm_type = RMAN_ARRAY;
faithunits->rm_descr = "configurable if_faith units";
err = rman_init(faithunits);
if (err != 0)
return (err);
err = rman_manage_region(faithunits, 0, FAITH_MAXUNIT);
if (err != 0) {
printf("%s: faithunits: rman_manage_region: "
"Failed %d\n", FAITHNAME, err);
rman_fini(faithunits);
return (err);
}
LIST_INIT(&faith_softc_list);
if_clone_attach(&faith_cloner);
#ifdef INET6
faithprefix_p = faithprefix;
#endif
break;
case MOD_UNLOAD:
#ifdef INET6
faithprefix_p = NULL;
#endif
if_clone_detach(&faith_cloner);
while (!LIST_EMPTY(&faith_softc_list))
faith_clone_destroy(
&LIST_FIRST(&faith_softc_list)->sc_if);
err = rman_fini(faithunits);
if (err != 0)
return (err);
break;
}
return 0;
}
static moduledata_t faith_mod = {
"if_faith",
faithmodevent,
0
};
DECLARE_MODULE(if_faith, faith_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(if_faith, 1);
int
faith_clone_create(ifc, unit)
struct if_clone *ifc;
int *unit;
{
struct resource *r;
struct faith_softc *sc;
if (*unit > FAITH_MAXUNIT)
return (ENXIO);
if (*unit < 0) {
r = rman_reserve_resource(faithunits, 0, FAITH_MAXUNIT, 1,
RF_ALLOCATED | RF_ACTIVE, NULL);
if (r == NULL)
return (ENOSPC);
*unit = rman_get_start(r);
} else {
r = rman_reserve_resource(faithunits, *unit, *unit, 1,
RF_ALLOCATED | RF_ACTIVE, NULL);
if (r == NULL)
return (ENOSPC);
}
sc = malloc(sizeof(struct faith_softc), M_FAITH, M_WAITOK);
bzero(sc, sizeof(struct faith_softc));
sc->sc_if.if_softc = sc;
sc->sc_if.if_name = FAITHNAME;
sc->sc_if.if_unit = *unit;
sc->r_unit = r;
sc->sc_if.if_mtu = FAITHMTU;
/* Change to BROADCAST experimentaly to announce its prefix. */
sc->sc_if.if_flags = /* IFF_LOOPBACK */ IFF_BROADCAST | IFF_MULTICAST;
sc->sc_if.if_ioctl = faithioctl;
sc->sc_if.if_output = faithoutput;
sc->sc_if.if_type = IFT_FAITH;
sc->sc_if.if_hdrlen = 0;
sc->sc_if.if_addrlen = 0;
if_attach(&sc->sc_if);
bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
LIST_INSERT_HEAD(&faith_softc_list, sc, sc_list);
return (0);
}
void
faith_clone_destroy(ifp)
struct ifnet *ifp;
{
int err;
struct faith_softc *sc = (void *) ifp;
LIST_REMOVE(sc, sc_list);
bpfdetach(ifp);
if_detach(ifp);
err = rman_release_resource(sc->r_unit);
KASSERT(err == 0, ("Unexpected error freeing resource"));
free(sc, M_FAITH);
}
int
@ -144,7 +247,7 @@ faithoutput(ifp, m, dst, rt)
if ((m->m_flags & M_PKTHDR) == 0)
panic("faithoutput no HDR");
#if NBPFILTER > 0
/* BPF write needs to be handled specially */
if (dst->sa_family == AF_UNSPEC) {
dst->sa_family = *(mtod(m, int *));
@ -168,13 +271,8 @@ faithoutput(ifp, m, dst, rt)
m0.m_len = 4;
m0.m_data = (char *)&af;
#ifdef HAVE_OLD_BPF
bpf_mtap(ifp, &m0);
#else
bpf_mtap(ifp->if_bpf, &m0);
#endif
}
#endif
if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
m_freem(m);
@ -297,7 +395,7 @@ faithioctl(ifp, cmd, data)
* XXX could be slow
* XXX could be layer violation to call sys/net from sys/netinet6
*/
int
static int
faithprefix(in6)
struct in6_addr *in6;
{
@ -323,4 +421,3 @@ faithprefix(in6)
return ret;
}
#endif
#endif /* NFAITH > 0 */

43
sys/net/if_faith.h
View File

@ -1,43 +0,0 @@
/* $FreeBSD$ */
/* $KAME: if_faith.h,v 1.1 2000/07/26 05:49:21 itojun Exp $ */
/*
* Copyright (C) 2000 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.
*/
#ifndef _NET_IF_FAITH_H_
#define _NET_IF_FAITH_H_
#ifdef _KERNEL
#ifdef INET6
struct in6_addr;
int faithprefix __P((struct in6_addr *));
#endif
#endif
#endif /* _NET_IF_FAITH_H_ */

4
sys/netinet/in_pcb.c
View File

@ -67,8 +67,6 @@
#include <netinet6/ip6_var.h>
#endif /* INET6 */
#include "faith.h"
#ifdef IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
@ -919,11 +917,9 @@ in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard,
#endif
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_lport == lport) {
#if defined(NFAITH) && NFAITH > 0
if (ifp && ifp->if_type == IFT_FAITH &&
(inp->inp_flags & INP_FAITH) == 0)
continue;
#endif
if (inp->inp_laddr.s_addr == laddr.s_addr)
return (inp);
else if (inp->inp_laddr.s_addr == INADDR_ANY) {

8
sys/netinet/ip_icmp.c
View File

@ -46,6 +46,7 @@
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#define _IP_VHL
@ -62,11 +63,6 @@
#include <netkey/key.h>
#endif
#include "faith.h"
#if defined(NFAITH) && NFAITH > 0
#include <net/if_types.h>
#endif
#include <machine/in_cksum.h>
/*
@ -275,7 +271,6 @@ icmp_input(m, off)
m->m_len += hlen;
m->m_data -= hlen;
#if defined(NFAITH) && 0 < NFAITH
if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_type == IFT_FAITH) {
/*
* Deliver very specific ICMP type only.
@ -288,7 +283,6 @@ icmp_input(m, off)
goto freeit;
}
}
#endif
#ifdef ICMPPRINTFS
if (icmpprintfs)

10
sys/netinet/ip_input.c
View File

@ -60,6 +60,7 @@
#include <net/pfil.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/route.h>
@ -84,11 +85,6 @@
#include <netkey/key.h>
#endif
#include "faith.h"
#if defined(NFAITH) && NFAITH > 0
#include <net/if_types.h>
#endif
#ifdef DUMMYNET
#include <netinet/ip_dummynet.h>
#endif
@ -557,6 +553,7 @@ ip_input(struct mbuf *m)
* the packets are received.
*/
checkif = ip_checkinterface && (ipforwarding == 0) &&
m->m_pkthdr.rcvif != NULL &&
((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) &&
(ip_fw_fwd_addr == NULL);
@ -634,7 +631,6 @@ ip_input(struct mbuf *m)
if (ip->ip_dst.s_addr == INADDR_ANY)
goto ours;
#if defined(NFAITH) && 0 < NFAITH
/*
* FAITH(Firewall Aided Internet Translator)
*/
@ -646,7 +642,7 @@ ip_input(struct mbuf *m)
m_freem(m);
return;
}
#endif
/*
* Not for us; forward if possible and desirable.
*/

10
sys/netinet/ip_output.c
View File

@ -63,8 +63,6 @@
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include "faith.h"
#include <machine/in_cksum.h>
static MALLOC_DEFINE(M_IPMOPTS, "ip_moptions", "internet multicast options");
@ -1166,9 +1164,7 @@ ip_ctloutput(so, sopt)
case IP_RECVRETOPTS:
case IP_RECVDSTADDR:
case IP_RECVIF:
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
#endif
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
if (error)
@ -1204,11 +1200,9 @@ ip_ctloutput(so, sopt)
OPTSET(INP_RECVIF);
break;
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
OPTSET(INP_FAITH);
break;
#endif
}
break;
#undef OPTSET
@ -1300,9 +1294,7 @@ ip_ctloutput(so, sopt)
case IP_RECVDSTADDR:
case IP_RECVIF:
case IP_PORTRANGE:
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
#endif
switch (sopt->sopt_name) {
case IP_TOS:
@ -1340,11 +1332,9 @@ ip_ctloutput(so, sopt)
optval = 0;
break;
#if defined(NFAITH) && NFAITH > 0
case IP_FAITH:
optval = OPTBIT(INP_FAITH);
break;
#endif
}
error = sooptcopyout(sopt, &optval, sizeof optval);
break;

9
sys/netinet6/icmp6.c
View File

@ -103,11 +103,6 @@
#include <netkey/key.h>
#endif
#include "faith.h"
#if defined(NFAITH) && 0 < NFAITH
#include <net/if_faith.h>
#endif
#include <net/net_osdep.h>
#ifdef HAVE_NRL_INPCB
@ -439,8 +434,7 @@ icmp6_input(mp, offp, proto)
goto freeit;
}
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
/*
* Deliver very specific ICMP6 type only.
* This is important to deilver TOOBIG. Otherwise PMTUD
@ -455,7 +449,6 @@ icmp6_input(mp, offp, proto)
goto freeit;
}
}
#endif
icmp6stat.icp6s_inhist[icmp6->icmp6_type]++;
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_msg);

2
sys/netinet6/in6.c
View File

@ -138,6 +138,8 @@ static void in6_unlink_ifa __P((struct in6_ifaddr *, struct ifnet *));
struct in6_multihead in6_multihead; /* XXX BSS initialization */
int (*faithprefix_p)(struct in6_addr *);
/*
* Subroutine for in6_ifaddloop() and in6_ifremloop().
* This routine does actual work.

2
sys/netinet6/in6.h
View File

@ -600,6 +600,8 @@ void in6_sin_2_v4mapsin6_in_sock __P((struct sockaddr **nam));
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
#define sin6tosa(sin6) ((struct sockaddr *)(sin6))
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
extern int (*faithprefix_p)(struct in6_addr *);
#endif /* _KERNEL */
__BEGIN_DECLS

14
sys/netinet6/in6_pcb.c
View File

@ -100,11 +100,6 @@
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
#include "faith.h"
#if defined(NFAITH) && NFAITH > 0
#include <net/if_faith.h>
#endif
#ifdef IPSEC
#include <netinet6/ipsec.h>
#ifdef INET6
@ -1039,11 +1034,10 @@ in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp)
u_short fport = fport_arg, lport = lport_arg;
int faith;
#if defined(NFAITH) && NFAITH > 0
faith = faithprefix(laddr);
#else
faith = 0;
#endif
if (faithprefix_p != NULL)
faith = (*faithprefix_p)(laddr);
else
faith = 0;
/*
* First look for an exact match.

4
sys/netinet6/ip6_input.c
View File

@ -121,8 +121,6 @@
#include <netinet6/ip6protosw.h>
#include "faith.h"
#include <net/net_osdep.h>
extern struct domain inet6domain;
@ -633,7 +631,6 @@ ip6_input(m)
/*
* FAITH(Firewall Aided Internet Translator)
*/
#if defined(NFAITH) && 0 < NFAITH
if (ip6_keepfaith) {
if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp
&& ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
@ -643,7 +640,6 @@ ip6_input(m)
goto hbhcheck;
}
}
#endif
/*
* Now there is no reason to process the packet if it's not our own

9
sys/netinet6/raw_ip6.c
View File

@ -104,11 +104,6 @@
#include <machine/stdarg.h>
#include "faith.h"
#if defined(NFAITH) && 0 < NFAITH
#include <net/if_faith.h>
#endif
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
@ -142,13 +137,11 @@ rip6_input(mp, offp, proto)
rip6stat.rip6s_ipackets++;
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
/* XXX send icmp6 host/port unreach? */
m_freem(m);
return IPPROTO_DONE;
}
#endif
init_sin6(&rip6src, m); /* general init */

2
sys/netinet6/udp6_output.c
View File

@ -107,8 +107,6 @@
#endif
#endif /*IPSEC*/
#include "faith.h"
#include <net/net_osdep.h>
/*

9
sys/netinet6/udp6_usrreq.c
View File

@ -106,11 +106,6 @@
#include <netinet6/ipsec6.h>
#endif /*IPSEC*/
#include "faith.h"
#if defined(NFAITH) && NFAITH > 0
#include <net/if_faith.h>
#endif
/*
* UDP protocol inplementation.
* Per RFC 768, August, 1980.
@ -161,13 +156,11 @@ udp6_input(mp, offp, proto)
ip6 = mtod(m, struct ip6_hdr *);
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
/* XXX send icmp6 host/port unreach? */
m_freem(m);
return IPPROTO_DONE;
}
#endif
udpstat.udps_ipackets++;