1 /*- 2 * Copyright (c) 2007-2008 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * This software was developed by Robert Watson for the TrustedBSD Project. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_mac.h" 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/sbuf.h> 40 #include <sys/systm.h> 41 #include <sys/mount.h> 42 #include <sys/file.h> 43 #include <sys/namei.h> 44 #include <sys/protosw.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/sysctl.h> 48 49 #include <net/if.h> 50 #include <net/if_var.h> 51 52 #include <netinet/in.h> 53 #include <netinet/ip6.h> 54 #include <netinet6/ip6_var.h> 55 56 #include <security/mac/mac_framework.h> 57 #include <security/mac/mac_internal.h> 58 #include <security/mac/mac_policy.h> 59 60 static struct label * 61 mac_ip6q_label_alloc(int flag) 62 { 63 struct label *label; 64 int error; 65 66 label = mac_labelzone_alloc(flag); 67 if (label == NULL) 68 return (NULL); 69 70 MAC_CHECK(ip6q_init_label, label, flag); 71 if (error) { 72 MAC_PERFORM(ip6q_destroy_label, label); 73 mac_labelzone_free(label); 74 return (NULL); 75 } 76 return (label); 77 } 78 79 int 80 mac_ip6q_init(struct ip6q *q6, int flag) 81 { 82 83 if (mac_labeled & MPC_OBJECT_IP6Q) { 84 q6->ip6q_label = mac_ip6q_label_alloc(flag); 85 if (q6->ip6q_label == NULL) 86 return (ENOMEM); 87 } else 88 q6->ip6q_label = NULL; 89 return (0); 90 } 91 92 static void 93 mac_ip6q_label_free(struct label *label) 94 { 95 96 MAC_PERFORM(ip6q_destroy_label, label); 97 mac_labelzone_free(label); 98 } 99 100 void 101 mac_ip6q_destroy(struct ip6q *q6) 102 { 103 104 if (q6->ip6q_label != NULL) { 105 mac_ip6q_label_free(q6->ip6q_label); 106 q6->ip6q_label = NULL; 107 } 108 } 109 110 void 111 mac_ip6q_reassemble(struct ip6q *q6, struct mbuf *m) 112 { 113 struct label *label; 114 115 label = mac_mbuf_to_label(m); 116 117 MAC_PERFORM(ip6q_reassemble, q6, q6->ip6q_label, m, label); 118 } 119 120 void 121 mac_ip6q_create(struct mbuf *m, struct ip6q *q6) 122 { 123 struct label *label; 124 125 label = mac_mbuf_to_label(m); 126 127 MAC_PERFORM(ip6q_create, m, label, q6, q6->ip6q_label); 128 } 129 130 int 131 mac_ip6q_match(struct mbuf *m, struct ip6q *q6) 132 { 133 struct label *label; 134 int result; 135 136 label = mac_mbuf_to_label(m); 137 138 result = 1; 139 MAC_BOOLEAN(ip6q_match, &&, m, label, q6, q6->ip6q_label); 140 141 return (result); 142 } 143 144 void 145 mac_ip6q_update(struct mbuf *m, struct ip6q *q6) 146 { 147 struct label *label; 148 149 label = mac_mbuf_to_label(m); 150 151 MAC_PERFORM(ip6q_update, m, label, q6, q6->ip6q_label); 152 } 153 154 void 155 mac_netinet6_nd6_send(struct ifnet *ifp, struct mbuf *m) 156 { 157 struct label *mlabel; 158 159 mlabel = mac_mbuf_to_label(m); 160 161 MAC_PERFORM(netinet6_nd6_send, ifp, ifp->if_label, m, mlabel); 162 } 163