c9ea2dcf62
mac_setsockopt_label() into mac_socket_label_set(); make it non-static so that it can be invoked from kern_mac.c for mac_set_fd(). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
992 lines
21 KiB
C
992 lines
21 KiB
C
/*-
|
|
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
|
|
* Copyright (c) 2001 Ilmar S. Habibulin
|
|
* Copyright (c) 2001, 2002, 2003 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Robert Watson and Ilmar Habibulin for the
|
|
* TrustedBSD Project.
|
|
*
|
|
* This software was developed for the FreeBSD Project in part by Network
|
|
* Associates Laboratories, the Security Research Division of Network
|
|
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
|
|
* as part of the DARPA CHATS research program.
|
|
*
|
|
* 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 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 AUTHOR 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/file.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <sys/mac_policy.h>
|
|
|
|
#include <net/bpfdesc.h>
|
|
#include <net/if.h>
|
|
#include <net/if_var.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip_var.h>
|
|
|
|
#include <security/mac/mac_internal.h>
|
|
|
|
static int mac_enforce_network = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_network, CTLFLAG_RW,
|
|
&mac_enforce_network, 0, "Enforce MAC policy on network packets");
|
|
TUNABLE_INT("security.mac.enforce_network", &mac_enforce_network);
|
|
|
|
static int mac_enforce_socket = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_socket, CTLFLAG_RW,
|
|
&mac_enforce_socket, 0, "Enforce MAC policy on socket operations");
|
|
TUNABLE_INT("security.mac.enforce_socket", &mac_enforce_socket);
|
|
|
|
#ifdef MAC_DEBUG
|
|
static unsigned int nmacmbufs, nmacifnets, nmacbpfdescs, nmacsockets,
|
|
nmacipqs;
|
|
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, mbufs, CTLFLAG_RD,
|
|
&nmacmbufs, 0, "number of mbufs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ifnets, CTLFLAG_RD,
|
|
&nmacifnets, 0, "number of ifnets in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipqs, CTLFLAG_RD,
|
|
&nmacipqs, 0, "number of ipqs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, bpfdescs, CTLFLAG_RD,
|
|
&nmacbpfdescs, 0, "number of bpfdescs in use");
|
|
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, sockets, CTLFLAG_RD,
|
|
&nmacsockets, 0, "number of sockets in use");
|
|
#endif
|
|
|
|
static void mac_socket_label_free(struct label *label);
|
|
|
|
|
|
static struct label *
|
|
mbuf_to_label(struct mbuf *mbuf)
|
|
{
|
|
struct m_tag *tag;
|
|
struct label *label;
|
|
|
|
tag = m_tag_find(mbuf, PACKET_TAG_MACLABEL, NULL);
|
|
label = (struct label *)(tag+1);
|
|
|
|
return (label);
|
|
}
|
|
|
|
static struct label *
|
|
mac_bpfdesc_label_alloc(void)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_labelzone_alloc(M_WAITOK);
|
|
MAC_PERFORM(init_bpfdesc_label, label);
|
|
MAC_DEBUG_COUNTER_INC(&nmacbpfdescs);
|
|
return (label);
|
|
}
|
|
|
|
void
|
|
mac_init_bpfdesc(struct bpf_d *bpf_d)
|
|
{
|
|
|
|
bpf_d->bd_label = mac_bpfdesc_label_alloc();
|
|
}
|
|
|
|
static struct label *
|
|
mac_ifnet_label_alloc(void)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_labelzone_alloc(M_WAITOK);
|
|
MAC_PERFORM(init_ifnet_label, label);
|
|
MAC_DEBUG_COUNTER_INC(&nmacifnets);
|
|
return (label);
|
|
}
|
|
|
|
void
|
|
mac_init_ifnet(struct ifnet *ifp)
|
|
{
|
|
|
|
ifp->if_label = mac_ifnet_label_alloc();
|
|
}
|
|
|
|
static struct label *
|
|
mac_ipq_label_alloc(int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = mac_labelzone_alloc(flag);
|
|
if (label == NULL)
|
|
return (NULL);
|
|
|
|
MAC_CHECK(init_ipq_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_ipq_label, label);
|
|
mac_labelzone_free(label);
|
|
return (NULL);
|
|
}
|
|
MAC_DEBUG_COUNTER_INC(&nmacipqs);
|
|
return (label);
|
|
}
|
|
|
|
int
|
|
mac_init_ipq(struct ipq *ipq, int flag)
|
|
{
|
|
|
|
ipq->ipq_label = mac_ipq_label_alloc(flag);
|
|
if (ipq->ipq_label == NULL)
|
|
return (ENOMEM);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mac_init_mbuf_tag(struct m_tag *tag, int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = (struct label *) (tag + 1);
|
|
mac_init_label(label);
|
|
|
|
MAC_CHECK(init_mbuf_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_mbuf_label, label);
|
|
mac_destroy_label(label);
|
|
} else {
|
|
MAC_DEBUG_COUNTER_INC(&nmacmbufs);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_init_mbuf(struct mbuf *m, int flag)
|
|
{
|
|
struct m_tag *tag;
|
|
int error;
|
|
|
|
M_ASSERTPKTHDR(m);
|
|
|
|
#ifndef MAC_ALWAYS_LABEL_MBUF
|
|
/*
|
|
* If conditionally allocating mbuf labels, don't allocate unless
|
|
* they are required.
|
|
*/
|
|
if (!mac_labelmbufs)
|
|
return (0);
|
|
#endif
|
|
tag = m_tag_get(PACKET_TAG_MACLABEL, sizeof(struct label),
|
|
flag);
|
|
if (tag == NULL)
|
|
return (ENOMEM);
|
|
error = mac_init_mbuf_tag(tag, flag);
|
|
if (error) {
|
|
m_tag_free(tag);
|
|
return (error);
|
|
}
|
|
m_tag_prepend(m, tag);
|
|
return (0);
|
|
}
|
|
|
|
static struct label *
|
|
mac_socket_label_alloc(int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = mac_labelzone_alloc(flag);
|
|
if (label == NULL)
|
|
return (NULL);
|
|
|
|
MAC_CHECK(init_socket_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_socket_label, label);
|
|
mac_labelzone_free(label);
|
|
return (NULL);
|
|
}
|
|
MAC_DEBUG_COUNTER_INC(&nmacsockets);
|
|
return (label);
|
|
}
|
|
|
|
static struct label *
|
|
mac_socket_peer_label_alloc(int flag)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
label = mac_labelzone_alloc(flag);
|
|
if (label == NULL)
|
|
return (NULL);
|
|
|
|
MAC_CHECK(init_socket_peer_label, label, flag);
|
|
if (error) {
|
|
MAC_PERFORM(destroy_socket_peer_label, label);
|
|
mac_labelzone_free(label);
|
|
return (NULL);
|
|
}
|
|
MAC_DEBUG_COUNTER_INC(&nmacsockets);
|
|
return (label);
|
|
}
|
|
|
|
int
|
|
mac_init_socket(struct socket *so, int flag)
|
|
{
|
|
|
|
so->so_label = mac_socket_label_alloc(flag);
|
|
if (so->so_label == NULL)
|
|
return (ENOMEM);
|
|
so->so_peerlabel = mac_socket_peer_label_alloc(flag);
|
|
if (so->so_peerlabel == NULL) {
|
|
mac_socket_label_free(so->so_label);
|
|
so->so_label = NULL;
|
|
return (ENOMEM);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_bpfdesc_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_bpfdesc_label, label);
|
|
mac_labelzone_free(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacbpfdescs);
|
|
}
|
|
|
|
void
|
|
mac_destroy_bpfdesc(struct bpf_d *bpf_d)
|
|
{
|
|
|
|
mac_bpfdesc_label_free(bpf_d->bd_label);
|
|
bpf_d->bd_label = NULL;
|
|
}
|
|
|
|
static void
|
|
mac_ifnet_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_ifnet_label, label);
|
|
mac_labelzone_free(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacifnets);
|
|
}
|
|
|
|
void
|
|
mac_destroy_ifnet(struct ifnet *ifp)
|
|
{
|
|
|
|
mac_ifnet_label_free(ifp->if_label);
|
|
ifp->if_label = NULL;
|
|
}
|
|
|
|
static void
|
|
mac_ipq_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_ipq_label, label);
|
|
mac_labelzone_free(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacipqs);
|
|
}
|
|
|
|
void
|
|
mac_destroy_ipq(struct ipq *ipq)
|
|
{
|
|
|
|
mac_ipq_label_free(ipq->ipq_label);
|
|
ipq->ipq_label = NULL;
|
|
}
|
|
|
|
void
|
|
mac_destroy_mbuf_tag(struct m_tag *tag)
|
|
{
|
|
struct label *label;
|
|
|
|
label = (struct label *)(tag+1);
|
|
|
|
MAC_PERFORM(destroy_mbuf_label, label);
|
|
mac_destroy_label(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacmbufs);
|
|
}
|
|
|
|
static void
|
|
mac_socket_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_socket_label, label);
|
|
mac_labelzone_free(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacsockets);
|
|
}
|
|
|
|
static void
|
|
mac_socket_peer_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_socket_peer_label, label);
|
|
mac_labelzone_free(label);
|
|
MAC_DEBUG_COUNTER_DEC(&nmacsockets);
|
|
}
|
|
|
|
void
|
|
mac_destroy_socket(struct socket *socket)
|
|
{
|
|
|
|
mac_socket_label_free(socket->so_label);
|
|
socket->so_label = NULL;
|
|
mac_socket_peer_label_free(socket->so_peerlabel);
|
|
socket->so_peerlabel = NULL;
|
|
}
|
|
|
|
void
|
|
mac_copy_mbuf_tag(struct m_tag *src, struct m_tag *dest)
|
|
{
|
|
struct label *src_label, *dest_label;
|
|
|
|
src_label = (struct label *)(src+1);
|
|
dest_label = (struct label *)(dest+1);
|
|
|
|
/*
|
|
* mac_init_mbuf_tag() is called on the target tag in
|
|
* m_tag_copy(), so we don't need to call it here.
|
|
*/
|
|
MAC_PERFORM(copy_mbuf_label, src_label, dest_label);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_ifnet_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(ifnet, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_socket_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(socket, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_externalize_socket_peer_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(socket_peer, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_ifnet_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(ifnet, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_internalize_socket_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(socket, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_create_ifnet(struct ifnet *ifnet)
|
|
{
|
|
|
|
MAC_PERFORM(create_ifnet, ifnet, ifnet->if_label);
|
|
}
|
|
|
|
void
|
|
mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d)
|
|
{
|
|
|
|
MAC_PERFORM(create_bpfdesc, cred, bpf_d, bpf_d->bd_label);
|
|
}
|
|
|
|
void
|
|
mac_create_socket(struct ucred *cred, struct socket *socket)
|
|
{
|
|
|
|
MAC_PERFORM(create_socket, cred, socket, socket->so_label);
|
|
}
|
|
|
|
void
|
|
mac_create_socket_from_socket(struct socket *oldsocket,
|
|
struct socket *newsocket)
|
|
{
|
|
|
|
MAC_PERFORM(create_socket_from_socket, oldsocket, oldsocket->so_label,
|
|
newsocket, newsocket->so_label);
|
|
}
|
|
|
|
static void
|
|
mac_relabel_socket(struct ucred *cred, struct socket *socket,
|
|
struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(relabel_socket, cred, socket, socket->so_label, newlabel);
|
|
}
|
|
|
|
void
|
|
mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct socket *socket)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_PERFORM(set_socket_peer_from_mbuf, mbuf, label, socket,
|
|
socket->so_peerlabel);
|
|
}
|
|
|
|
void
|
|
mac_set_socket_peer_from_socket(struct socket *oldsocket,
|
|
struct socket *newsocket)
|
|
{
|
|
|
|
MAC_PERFORM(set_socket_peer_from_socket, oldsocket,
|
|
oldsocket->so_label, newsocket, newsocket->so_peerlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(datagram);
|
|
|
|
MAC_PERFORM(create_datagram_from_ipq, ipq, ipq->ipq_label,
|
|
datagram, label);
|
|
}
|
|
|
|
void
|
|
mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment)
|
|
{
|
|
struct label *datagramlabel, *fragmentlabel;
|
|
|
|
datagramlabel = mbuf_to_label(datagram);
|
|
fragmentlabel = mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(create_fragment, datagram, datagramlabel, fragment,
|
|
fragmentlabel);
|
|
}
|
|
|
|
void
|
|
mac_create_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(create_ipq, fragment, label, ipq, ipq->ipq_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf)
|
|
{
|
|
struct label *oldmbuflabel, *newmbuflabel;
|
|
|
|
oldmbuflabel = mbuf_to_label(oldmbuf);
|
|
newmbuflabel = mbuf_to_label(newmbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_from_mbuf, oldmbuf, oldmbuflabel, newmbuf,
|
|
newmbuflabel);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_from_bpfdesc, bpf_d, bpf_d->bd_label, mbuf,
|
|
label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_linklayer, ifnet, ifnet->if_label, mbuf,
|
|
label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_from_ifnet, ifnet, ifnet->if_label, mbuf,
|
|
label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, struct ifnet *ifnet,
|
|
struct mbuf *newmbuf)
|
|
{
|
|
struct label *oldmbuflabel, *newmbuflabel;
|
|
|
|
oldmbuflabel = mbuf_to_label(oldmbuf);
|
|
newmbuflabel = mbuf_to_label(newmbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_multicast_encap, oldmbuf, oldmbuflabel,
|
|
ifnet, ifnet->if_label, newmbuf, newmbuflabel);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf)
|
|
{
|
|
struct label *oldmbuflabel, *newmbuflabel;
|
|
|
|
oldmbuflabel = mbuf_to_label(oldmbuf);
|
|
newmbuflabel = mbuf_to_label(newmbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_netlayer, oldmbuf, oldmbuflabel, newmbuf,
|
|
newmbuflabel);
|
|
}
|
|
|
|
int
|
|
mac_fragment_match(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
int result;
|
|
|
|
label = mbuf_to_label(fragment);
|
|
|
|
result = 1;
|
|
MAC_BOOLEAN(fragment_match, &&, fragment, label, ipq,
|
|
ipq->ipq_label);
|
|
|
|
return (result);
|
|
}
|
|
|
|
void
|
|
mac_reflect_mbuf_icmp(struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(m);
|
|
|
|
MAC_PERFORM(reflect_mbuf_icmp, m, label);
|
|
}
|
|
void
|
|
mac_reflect_mbuf_tcp(struct mbuf *m)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(m);
|
|
|
|
MAC_PERFORM(reflect_mbuf_tcp, m, label);
|
|
}
|
|
|
|
void
|
|
mac_update_ipq(struct mbuf *fragment, struct ipq *ipq)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(fragment);
|
|
|
|
MAC_PERFORM(update_ipq, fragment, label, ipq, ipq->ipq_label);
|
|
}
|
|
|
|
void
|
|
mac_create_mbuf_from_socket(struct socket *socket, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_PERFORM(create_mbuf_from_socket, socket, socket->so_label, mbuf,
|
|
label);
|
|
}
|
|
|
|
int
|
|
mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_network)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_bpfdesc_receive, bpf_d, bpf_d->bd_label, ifnet,
|
|
ifnet->if_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
M_ASSERTPKTHDR(mbuf);
|
|
|
|
if (!mac_enforce_network)
|
|
return (0);
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_CHECK(check_ifnet_transmit, ifnet, ifnet->if_label, mbuf,
|
|
label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_bind(struct ucred *ucred, struct socket *socket,
|
|
struct sockaddr *sockaddr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_bind, ucred, socket, socket->so_label,
|
|
sockaddr);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_connect(struct ucred *cred, struct socket *socket,
|
|
struct sockaddr *sockaddr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_connect, cred, socket, socket->so_label,
|
|
sockaddr);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_deliver(struct socket *socket, struct mbuf *mbuf)
|
|
{
|
|
struct label *label;
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
label = mbuf_to_label(mbuf);
|
|
|
|
MAC_CHECK(check_socket_deliver, socket, socket->so_label, mbuf,
|
|
label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_listen(struct ucred *cred, struct socket *socket)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_listen, cred, socket, socket->so_label);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_receive(struct ucred *cred, struct socket *so)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_receive, cred, so, so->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_check_socket_relabel(struct ucred *cred, struct socket *socket,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
MAC_CHECK(check_socket_relabel, cred, socket, socket->so_label,
|
|
newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_send(struct ucred *cred, struct socket *so)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_send, cred, so, so->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_check_socket_visible(struct ucred *cred, struct socket *socket)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_socket)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_socket_visible, cred, socket, socket->so_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
|
|
struct ifnet *ifnet)
|
|
{
|
|
char *elements, *buffer;
|
|
struct mac mac;
|
|
int error;
|
|
|
|
error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, elements, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_ifnet_label(ifnet->if_label, elements,
|
|
buffer, mac.m_buflen);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac.m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
|
|
struct ifnet *ifnet)
|
|
{
|
|
struct label *intlabel;
|
|
struct mac mac;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = copyin(ifr->ifr_ifru.ifru_data, &mac, sizeof(mac));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = mac_check_structmac_consistent(&mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac.m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac.m_string, buffer, mac.m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
intlabel = mac_ifnet_label_alloc();
|
|
error = mac_internalize_ifnet_label(intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error) {
|
|
mac_ifnet_label_free(intlabel);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* XXX: Note that this is a redundant privilege check, since
|
|
* policies impose this check themselves if required by the
|
|
* policy. Eventually, this should go away.
|
|
*/
|
|
error = suser_cred(cred, 0);
|
|
if (error) {
|
|
mac_ifnet_label_free(intlabel);
|
|
return (error);
|
|
}
|
|
|
|
MAC_CHECK(check_ifnet_relabel, cred, ifnet, ifnet->if_label,
|
|
intlabel);
|
|
if (error) {
|
|
mac_ifnet_label_free(intlabel);
|
|
return (error);
|
|
}
|
|
|
|
MAC_PERFORM(relabel_ifnet, cred, ifnet, ifnet->if_label, intlabel);
|
|
|
|
mac_ifnet_label_free(intlabel);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mac_socket_label_set(struct ucred *cred, struct socket *so,
|
|
struct label *label)
|
|
{
|
|
int error;
|
|
|
|
error = mac_check_socket_relabel(cred, so, label);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_relabel_socket(cred, so, label);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mac_setsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac)
|
|
{
|
|
struct label *intlabel;
|
|
char *buffer;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, buffer, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(buffer, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
intlabel = mac_socket_label_alloc(M_WAITOK);
|
|
error = mac_internalize_socket_label(intlabel, buffer);
|
|
free(buffer, M_MACTEMP);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* XXX: Socket lock here. */
|
|
error = mac_socket_label_set(cred, so, intlabel);
|
|
/* XXX: Socket unlock here. */
|
|
out:
|
|
mac_socket_label_free(intlabel);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_getsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac)
|
|
{
|
|
char *buffer, *elements;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_socket_label(so->so_label, elements,
|
|
buffer, mac->m_buflen);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac->m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so,
|
|
struct mac *mac)
|
|
{
|
|
char *elements, *buffer;
|
|
int error;
|
|
|
|
error = mac_check_structmac_consistent(mac);
|
|
if (error)
|
|
return (error);
|
|
|
|
elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK);
|
|
error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL);
|
|
if (error) {
|
|
free(elements, M_MACTEMP);
|
|
return (error);
|
|
}
|
|
|
|
buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
|
|
error = mac_externalize_socket_peer_label(so->so_peerlabel,
|
|
elements, buffer, mac->m_buflen);
|
|
if (error == 0)
|
|
error = copyout(buffer, mac->m_string, strlen(buffer)+1);
|
|
|
|
free(buffer, M_MACTEMP);
|
|
free(elements, M_MACTEMP);
|
|
|
|
return (error);
|
|
}
|