mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-24 09:13:37 +01:00
f188f14d43
the functions' calls match their definitions. Move them to header files. Reviewed by: jilles (previous version)
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*-
|
|
* Copyright (c) 2014 Andrey V. Elsukov <ae@FreeBSD.org>
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_inet.h"
|
|
#include "opt_inet6.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/rmlock.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
#include <net/vnet.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#ifdef INET
|
|
#include <net/ethernet.h>
|
|
#include <netinet/ip.h>
|
|
#endif
|
|
#include <netinet/ip_encap.h>
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet6/in6_var.h>
|
|
#include <net/if_gre.h>
|
|
|
|
extern struct domain inet6domain;
|
|
struct protosw in6_gre_protosw = {
|
|
.pr_type = SOCK_RAW,
|
|
.pr_domain = &inet6domain,
|
|
.pr_protocol = IPPROTO_GRE,
|
|
.pr_flags = PR_ATOMIC|PR_ADDR,
|
|
.pr_input = gre_input,
|
|
.pr_output = rip6_output,
|
|
.pr_ctloutput = rip6_ctloutput,
|
|
.pr_usrreqs = &rip6_usrreqs
|
|
};
|
|
|
|
VNET_DEFINE(int, ip6_gre_hlim) = IPV6_DEFHLIM;
|
|
#define V_ip6_gre_hlim VNET(ip6_gre_hlim)
|
|
|
|
SYSCTL_DECL(_net_inet6_ip6);
|
|
SYSCTL_INT(_net_inet6_ip6, OID_AUTO, grehlim, CTLFLAG_VNET | CTLFLAG_RW,
|
|
&VNET_NAME(ip6_gre_hlim), 0, "Default hop limit for encapsulated packets");
|
|
|
|
static int
|
|
in6_gre_encapcheck(const struct mbuf *m, int off, int proto, void *arg)
|
|
{
|
|
GRE_RLOCK_TRACKER;
|
|
struct gre_softc *sc;
|
|
struct ip6_hdr *ip6;
|
|
|
|
sc = (struct gre_softc *)arg;
|
|
if ((GRE2IFP(sc)->if_flags & IFF_UP) == 0)
|
|
return (0);
|
|
|
|
M_ASSERTPKTHDR(m);
|
|
/*
|
|
* We expect that payload contains at least IPv4
|
|
* or IPv6 packet.
|
|
*/
|
|
if (m->m_pkthdr.len < sizeof(struct greip6) +
|
|
#ifdef INET
|
|
sizeof(struct ip))
|
|
#else
|
|
sizeof(struct ip6_hdr))
|
|
#endif
|
|
return (0);
|
|
|
|
GRE_RLOCK(sc);
|
|
if (sc->gre_family == 0)
|
|
goto bad;
|
|
|
|
KASSERT(sc->gre_family == AF_INET6,
|
|
("wrong gre_family: %d", sc->gre_family));
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
if (!IN6_ARE_ADDR_EQUAL(&sc->gre_oip6.ip6_src, &ip6->ip6_dst) ||
|
|
!IN6_ARE_ADDR_EQUAL(&sc->gre_oip6.ip6_dst, &ip6->ip6_src))
|
|
goto bad;
|
|
|
|
GRE_RUNLOCK(sc);
|
|
return (128 * 2);
|
|
bad:
|
|
GRE_RUNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
in6_gre_output(struct mbuf *m, int af, int hlen)
|
|
{
|
|
struct greip6 *gi6;
|
|
|
|
gi6 = mtod(m, struct greip6 *);
|
|
gi6->gi6_ip6.ip6_hlim = V_ip6_gre_hlim;
|
|
return (ip6_output(m, NULL, NULL, IPV6_MINMTU, NULL, NULL, NULL));
|
|
}
|
|
|
|
int
|
|
in6_gre_attach(struct gre_softc *sc)
|
|
{
|
|
|
|
KASSERT(sc->gre_ecookie == NULL, ("gre_ecookie isn't NULL"));
|
|
sc->gre_ecookie = encap_attach_func(AF_INET6, IPPROTO_GRE,
|
|
in6_gre_encapcheck, &in6_gre_protosw, sc);
|
|
if (sc->gre_ecookie == NULL)
|
|
return (EEXIST);
|
|
return (0);
|
|
}
|