c66b4d8d26
to a new mac_inet.c. This code is now conditionally compiled based on inet support being compiled into the kernel. Move socket related MAC Framework entry points from mac_net.c to a new mac_socket.c. To do this, some additional _enforce MIB variables are now non-static. In addition, mbuf_to_label() is now mac_mbuf_to_label() and non-static. Obtained from: TrustedBSD Project Sponsored by: DARPA, McAfee Research
293 lines
6.5 KiB
C
293 lines
6.5 KiB
C
/*-
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* Copyright (c) 1999-2002 Robert N. M. Watson
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* Copyright (c) 2001 Ilmar S. Habibulin
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* Copyright (c) 2001-2004 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson and Ilmar Habibulin for the
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* TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/mac.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/file.h>
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#include <sys/namei.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/mac_policy.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_var.h>
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#include <security/mac/mac_internal.h>
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#ifdef MAC_DEBUG
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static unsigned int nmacinpcbs, nmacipqs;
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SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, inpcbs, CTLFLAG_RD,
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&nmacinpcbs, 0, "number of inpcbs in use");
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SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipqs, CTLFLAG_RD,
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&nmacipqs, 0, "number of ipqs in use");
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#endif
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static struct label *
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mac_inpcb_label_alloc(int flag)
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{
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struct label *label;
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int error;
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label = mac_labelzone_alloc(flag);
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if (label == NULL)
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return (NULL);
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MAC_CHECK(init_inpcb_label, label, flag);
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if (error) {
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MAC_PERFORM(destroy_inpcb_label, label);
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mac_labelzone_free(label);
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return (NULL);
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}
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MAC_DEBUG_COUNTER_INC(&nmacinpcbs);
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return (label);
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}
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int
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mac_init_inpcb(struct inpcb *inp, int flag)
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{
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inp->inp_label = mac_inpcb_label_alloc(flag);
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if (inp->inp_label == NULL)
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return (ENOMEM);
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return (0);
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}
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static struct label *
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mac_ipq_label_alloc(int flag)
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{
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struct label *label;
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int error;
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label = mac_labelzone_alloc(flag);
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if (label == NULL)
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return (NULL);
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MAC_CHECK(init_ipq_label, label, flag);
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if (error) {
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MAC_PERFORM(destroy_ipq_label, label);
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mac_labelzone_free(label);
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return (NULL);
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}
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MAC_DEBUG_COUNTER_INC(&nmacipqs);
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return (label);
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}
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int
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mac_init_ipq(struct ipq *ipq, int flag)
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{
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ipq->ipq_label = mac_ipq_label_alloc(flag);
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if (ipq->ipq_label == NULL)
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return (ENOMEM);
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return (0);
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}
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static void
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mac_inpcb_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_inpcb_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacinpcbs);
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}
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void
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mac_destroy_inpcb(struct inpcb *inp)
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{
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mac_inpcb_label_free(inp->inp_label);
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inp->inp_label = NULL;
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}
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static void
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mac_ipq_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_ipq_label, label);
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mac_labelzone_free(label);
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MAC_DEBUG_COUNTER_DEC(&nmacipqs);
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}
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void
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mac_destroy_ipq(struct ipq *ipq)
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{
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mac_ipq_label_free(ipq->ipq_label);
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ipq->ipq_label = NULL;
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}
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void
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mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp)
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{
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MAC_PERFORM(create_inpcb_from_socket, so, so->so_label, inp,
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inp->inp_label);
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}
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void
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mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram)
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{
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struct label *label;
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label = mac_mbuf_to_label(datagram);
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MAC_PERFORM(create_datagram_from_ipq, ipq, ipq->ipq_label,
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datagram, label);
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}
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void
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mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment)
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{
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struct label *datagramlabel, *fragmentlabel;
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datagramlabel = mac_mbuf_to_label(datagram);
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fragmentlabel = mac_mbuf_to_label(fragment);
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MAC_PERFORM(create_fragment, datagram, datagramlabel, fragment,
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fragmentlabel);
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}
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void
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mac_create_ipq(struct mbuf *fragment, struct ipq *ipq)
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{
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struct label *label;
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label = mac_mbuf_to_label(fragment);
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MAC_PERFORM(create_ipq, fragment, label, ipq, ipq->ipq_label);
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}
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void
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mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m)
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{
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struct label *mlabel;
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INP_LOCK_ASSERT(inp);
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mlabel = mac_mbuf_to_label(m);
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MAC_PERFORM(create_mbuf_from_inpcb, inp, inp->inp_label, m, mlabel);
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}
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int
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mac_fragment_match(struct mbuf *fragment, struct ipq *ipq)
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{
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struct label *label;
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int result;
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label = mac_mbuf_to_label(fragment);
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result = 1;
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MAC_BOOLEAN(fragment_match, &&, fragment, label, ipq,
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ipq->ipq_label);
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return (result);
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}
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void
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mac_reflect_mbuf_icmp(struct mbuf *m)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(reflect_mbuf_icmp, m, label);
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}
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void
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mac_reflect_mbuf_tcp(struct mbuf *m)
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{
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struct label *label;
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label = mac_mbuf_to_label(m);
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MAC_PERFORM(reflect_mbuf_tcp, m, label);
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}
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void
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mac_update_ipq(struct mbuf *fragment, struct ipq *ipq)
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{
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struct label *label;
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label = mac_mbuf_to_label(fragment);
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MAC_PERFORM(update_ipq, fragment, label, ipq, ipq->ipq_label);
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}
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int
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mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m)
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{
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struct label *label;
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int error;
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M_ASSERTPKTHDR(m);
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if (!mac_enforce_socket)
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return (0);
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label = mac_mbuf_to_label(m);
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MAC_CHECK(check_inpcb_deliver, inp, inp->inp_label, m, label);
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return (error);
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}
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void
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mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp)
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{
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/* XXX: assert socket lock. */
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INP_LOCK_ASSERT(inp);
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MAC_PERFORM(inpcb_sosetlabel, so, so->so_label, inp, inp->inp_label);
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}
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