1/* 2 * NetLabel Unlabeled Support 3 * 4 * This file defines functions for dealing with unlabeled packets for the 5 * NetLabel system. The NetLabel system manages static and dynamic label 6 * mappings for network protocols such as CIPSO and RIPSO. 7 * 8 * Author: Paul Moore <paul.moore@hp.com> 9 * 10 */ 11 12/* 13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006 14 * 15 * This program is free software; you can redistribute it and/or modify 16 * it under the terms of the GNU General Public License as published by 17 * the Free Software Foundation; either version 2 of the License, or 18 * (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 23 * the GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with this program; if not, write to the Free Software 27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 28 * 29 */ 30 31#ifndef _NETLABEL_UNLABELED_H 32#define _NETLABEL_UNLABELED_H 33 34#include <net/netlabel.h> 35 36/* 37 * The following NetLabel payloads are supported by the Unlabeled subsystem. 38 * 39 * o STATICADD 40 * This message is sent from an application to add a new static label for 41 * incoming unlabeled connections. 42 * 43 * Required attributes: 44 * 45 * NLBL_UNLABEL_A_IFACE 46 * NLBL_UNLABEL_A_SECCTX 47 * 48 * If IPv4 is specified the following attributes are required: 49 * 50 * NLBL_UNLABEL_A_IPV4ADDR 51 * NLBL_UNLABEL_A_IPV4MASK 52 * 53 * If IPv6 is specified the following attributes are required: 54 * 55 * NLBL_UNLABEL_A_IPV6ADDR 56 * NLBL_UNLABEL_A_IPV6MASK 57 * 58 * o STATICREMOVE 59 * This message is sent from an application to remove an existing static 60 * label for incoming unlabeled connections. 61 * 62 * Required attributes: 63 * 64 * NLBL_UNLABEL_A_IFACE 65 * 66 * If IPv4 is specified the following attributes are required: 67 * 68 * NLBL_UNLABEL_A_IPV4ADDR 69 * NLBL_UNLABEL_A_IPV4MASK 70 * 71 * If IPv6 is specified the following attributes are required: 72 * 73 * NLBL_UNLABEL_A_IPV6ADDR 74 * NLBL_UNLABEL_A_IPV6MASK 75 * 76 * o STATICLIST 77 * This message can be sent either from an application or by the kernel in 78 * response to an application generated STATICLIST message. When sent by an 79 * application there is no payload and the NLM_F_DUMP flag should be set. 80 * The kernel should response with a series of the following messages. 81 * 82 * Required attributes: 83 * 84 * NLBL_UNLABEL_A_IFACE 85 * NLBL_UNLABEL_A_SECCTX 86 * 87 * If IPv4 is specified the following attributes are required: 88 * 89 * NLBL_UNLABEL_A_IPV4ADDR 90 * NLBL_UNLABEL_A_IPV4MASK 91 * 92 * If IPv6 is specified the following attributes are required: 93 * 94 * NLBL_UNLABEL_A_IPV6ADDR 95 * NLBL_UNLABEL_A_IPV6MASK 96 * 97 * o STATICADDDEF 98 * This message is sent from an application to set the default static 99 * label for incoming unlabeled connections. 100 * 101 * Required attribute: 102 * 103 * NLBL_UNLABEL_A_SECCTX 104 * 105 * If IPv4 is specified the following attributes are required: 106 * 107 * NLBL_UNLABEL_A_IPV4ADDR 108 * NLBL_UNLABEL_A_IPV4MASK 109 * 110 * If IPv6 is specified the following attributes are required: 111 * 112 * NLBL_UNLABEL_A_IPV6ADDR 113 * NLBL_UNLABEL_A_IPV6MASK 114 * 115 * o STATICREMOVEDEF 116 * This message is sent from an application to remove the existing default 117 * static label for incoming unlabeled connections. 118 * 119 * If IPv4 is specified the following attributes are required: 120 * 121 * NLBL_UNLABEL_A_IPV4ADDR 122 * NLBL_UNLABEL_A_IPV4MASK 123 * 124 * If IPv6 is specified the following attributes are required: 125 * 126 * NLBL_UNLABEL_A_IPV6ADDR 127 * NLBL_UNLABEL_A_IPV6MASK 128 * 129 * o STATICLISTDEF 130 * This message can be sent either from an application or by the kernel in 131 * response to an application generated STATICLISTDEF message. When sent by 132 * an application there is no payload and the NLM_F_DUMP flag should be set. 133 * The kernel should response with the following message. 134 * 135 * Required attribute: 136 * 137 * NLBL_UNLABEL_A_SECCTX 138 * 139 * If IPv4 is specified the following attributes are required: 140 * 141 * NLBL_UNLABEL_A_IPV4ADDR 142 * NLBL_UNLABEL_A_IPV4MASK 143 * 144 * If IPv6 is specified the following attributes are required: 145 * 146 * NLBL_UNLABEL_A_IPV6ADDR 147 * NLBL_UNLABEL_A_IPV6MASK 148 * 149 * o ACCEPT 150 * This message is sent from an application to specify if the kernel should 151 * allow unlabled packets to pass if they do not match any of the static 152 * mappings defined in the unlabeled module. 153 * 154 * Required attributes: 155 * 156 * NLBL_UNLABEL_A_ACPTFLG 157 * 158 * o LIST 159 * This message can be sent either from an application or by the kernel in 160 * response to an application generated LIST message. When sent by an 161 * application there is no payload. The kernel should respond to a LIST 162 * message with a LIST message on success. 163 * 164 * Required attributes: 165 * 166 * NLBL_UNLABEL_A_ACPTFLG 167 * 168 */ 169 170/* NetLabel Unlabeled commands */ 171enum { 172 NLBL_UNLABEL_C_UNSPEC, 173 NLBL_UNLABEL_C_ACCEPT, 174 NLBL_UNLABEL_C_LIST, 175 NLBL_UNLABEL_C_STATICADD, 176 NLBL_UNLABEL_C_STATICREMOVE, 177 NLBL_UNLABEL_C_STATICLIST, 178 NLBL_UNLABEL_C_STATICADDDEF, 179 NLBL_UNLABEL_C_STATICREMOVEDEF, 180 NLBL_UNLABEL_C_STATICLISTDEF, 181 __NLBL_UNLABEL_C_MAX, 182}; 183#define NLBL_UNLABEL_C_MAX (__NLBL_UNLABEL_C_MAX - 1) 184 185/* NetLabel Unlabeled attributes */ 186enum { 187 NLBL_UNLABEL_A_UNSPEC, 188 NLBL_UNLABEL_A_ACPTFLG, 189 /* (NLA_U8) 190 * if true then unlabeled packets are allowed to pass, else unlabeled 191 * packets are rejected */ 192 NLBL_UNLABEL_A_IPV6ADDR, 193 /* (NLA_BINARY, struct in6_addr) 194 * an IPv6 address */ 195 NLBL_UNLABEL_A_IPV6MASK, 196 /* (NLA_BINARY, struct in6_addr) 197 * an IPv6 address mask */ 198 NLBL_UNLABEL_A_IPV4ADDR, 199 /* (NLA_BINARY, struct in_addr) 200 * an IPv4 address */ 201 NLBL_UNLABEL_A_IPV4MASK, 202 /* (NLA_BINARY, struct in_addr) 203 * and IPv4 address mask */ 204 NLBL_UNLABEL_A_IFACE, 205 /* (NLA_NULL_STRING) 206 * network interface */ 207 NLBL_UNLABEL_A_SECCTX, 208 /* (NLA_BINARY) 209 * a LSM specific security context */ 210 __NLBL_UNLABEL_A_MAX, 211}; 212#define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1) 213 214/* NetLabel protocol functions */ 215int netlbl_unlabel_genl_init(void); 216 217/* Unlabeled connection hash table size */ 218#define NETLBL_UNLHSH_BITSIZE 7 219 220/* General Unlabeled init function */ 221int netlbl_unlabel_init(u32 size); 222 223/* Static/Fallback label management functions */ 224int netlbl_unlhsh_add(struct net *net, 225 const char *dev_name, 226 const void *addr, 227 const void *mask, 228 u32 addr_len, 229 u32 secid, 230 struct netlbl_audit *audit_info); 231int netlbl_unlhsh_remove(struct net *net, 232 const char *dev_name, 233 const void *addr, 234 const void *mask, 235 u32 addr_len, 236 struct netlbl_audit *audit_info); 237 238/* Process Unlabeled incoming network packets */ 239int netlbl_unlabel_getattr(const struct sk_buff *skb, 240 u16 family, 241 struct netlbl_lsm_secattr *secattr); 242 243/* Set the default configuration to allow Unlabeled packets */ 244int netlbl_unlabel_defconf(void); 245 246#endif 247