Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NetLabel Kernel API |
| 3 | * |
| 4 | * This file defines the kernel API for the NetLabel system. The NetLabel |
| 5 | * system manages static and dynamic label mappings for network protocols such |
| 6 | * as CIPSO and RIPSO. |
| 7 | * |
Paul Moore | 82c21bf | 2011-08-01 11:10:33 +0000 | [diff] [blame] | 8 | * Author: Paul Moore <paul@paul-moore.com> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 9 | * |
| 10 | */ |
| 11 | |
| 12 | /* |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 13 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 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 |
Jeff Kirsher | d484ff1 | 2013-12-06 09:13:41 -0800 | [diff] [blame] | 26 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/types.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 32 | #include <linux/slab.h> |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 33 | #include <linux/audit.h> |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 34 | #include <linux/in.h> |
| 35 | #include <linux/in6.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 36 | #include <net/ip.h> |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 37 | #include <net/ipv6.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 38 | #include <net/netlabel.h> |
| 39 | #include <net/cipso_ipv4.h> |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 40 | #include <net/calipso.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 41 | #include <asm/bug.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 42 | #include <linux/atomic.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 43 | |
| 44 | #include "netlabel_domainhash.h" |
| 45 | #include "netlabel_unlabeled.h" |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 46 | #include "netlabel_cipso_v4.h" |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 47 | #include "netlabel_calipso.h" |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 48 | #include "netlabel_user.h" |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 49 | #include "netlabel_mgmt.h" |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 50 | #include "netlabel_addrlist.h" |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 51 | |
| 52 | /* |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 53 | * Configuration Functions |
| 54 | */ |
| 55 | |
| 56 | /** |
| 57 | * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping |
| 58 | * @domain: the domain mapping to remove |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 59 | * @family: address family |
| 60 | * @addr: IP address |
| 61 | * @mask: IP address mask |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 62 | * @audit_info: NetLabel audit information |
| 63 | * |
| 64 | * Description: |
| 65 | * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the |
| 66 | * default domain mapping to be removed. Returns zero on success, negative |
| 67 | * values on failure. |
| 68 | * |
| 69 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 70 | int netlbl_cfg_map_del(const char *domain, |
| 71 | u16 family, |
| 72 | const void *addr, |
| 73 | const void *mask, |
| 74 | struct netlbl_audit *audit_info) |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 75 | { |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 76 | if (addr == NULL && mask == NULL) { |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 77 | return netlbl_domhsh_remove(domain, family, audit_info); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 78 | } else if (addr != NULL && mask != NULL) { |
| 79 | switch (family) { |
| 80 | case AF_INET: |
| 81 | return netlbl_domhsh_remove_af4(domain, addr, mask, |
| 82 | audit_info); |
Huw Davies | 3f09354 | 2016-06-27 15:06:18 -0400 | [diff] [blame] | 83 | #if IS_ENABLED(CONFIG_IPV6) |
| 84 | case AF_INET6: |
| 85 | return netlbl_domhsh_remove_af6(domain, addr, mask, |
| 86 | audit_info); |
| 87 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 88 | default: |
| 89 | return -EPFNOSUPPORT; |
| 90 | } |
| 91 | } else |
| 92 | return -EINVAL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | /** |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 96 | * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 97 | * @domain: the domain mapping to add |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 98 | * @family: address family |
| 99 | * @addr: IP address |
| 100 | * @mask: IP address mask |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 101 | * @audit_info: NetLabel audit information |
| 102 | * |
| 103 | * Description: |
| 104 | * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL |
| 105 | * causes a new default domain mapping to be added. Returns zero on success, |
| 106 | * negative values on failure. |
| 107 | * |
| 108 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 109 | int netlbl_cfg_unlbl_map_add(const char *domain, |
| 110 | u16 family, |
| 111 | const void *addr, |
| 112 | const void *mask, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 113 | struct netlbl_audit *audit_info) |
| 114 | { |
| 115 | int ret_val = -ENOMEM; |
| 116 | struct netlbl_dom_map *entry; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 117 | struct netlbl_domaddr_map *addrmap = NULL; |
| 118 | struct netlbl_domaddr4_map *map4 = NULL; |
| 119 | struct netlbl_domaddr6_map *map6 = NULL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 120 | |
| 121 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 122 | if (entry == NULL) |
Paul Moore | 948a724 | 2008-10-10 10:16:30 -0400 | [diff] [blame] | 123 | return -ENOMEM; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 124 | if (domain != NULL) { |
| 125 | entry->domain = kstrdup(domain, GFP_ATOMIC); |
| 126 | if (entry->domain == NULL) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 127 | goto cfg_unlbl_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 128 | } |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 129 | entry->family = family; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 130 | |
| 131 | if (addr == NULL && mask == NULL) |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 132 | entry->def.type = NETLBL_NLTYPE_UNLABELED; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 133 | else if (addr != NULL && mask != NULL) { |
| 134 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); |
| 135 | if (addrmap == NULL) |
| 136 | goto cfg_unlbl_map_add_failure; |
| 137 | INIT_LIST_HEAD(&addrmap->list4); |
| 138 | INIT_LIST_HEAD(&addrmap->list6); |
| 139 | |
| 140 | switch (family) { |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 141 | case AF_INET: { |
| 142 | const struct in_addr *addr4 = addr; |
| 143 | const struct in_addr *mask4 = mask; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 144 | map4 = kzalloc(sizeof(*map4), GFP_ATOMIC); |
| 145 | if (map4 == NULL) |
| 146 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 147 | map4->def.type = NETLBL_NLTYPE_UNLABELED; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 148 | map4->list.addr = addr4->s_addr & mask4->s_addr; |
| 149 | map4->list.mask = mask4->s_addr; |
| 150 | map4->list.valid = 1; |
| 151 | ret_val = netlbl_af4list_add(&map4->list, |
| 152 | &addrmap->list4); |
| 153 | if (ret_val != 0) |
| 154 | goto cfg_unlbl_map_add_failure; |
| 155 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 156 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 157 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 158 | case AF_INET6: { |
| 159 | const struct in6_addr *addr6 = addr; |
| 160 | const struct in6_addr *mask6 = mask; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 161 | map6 = kzalloc(sizeof(*map6), GFP_ATOMIC); |
Julia Lawall | ca7daea | 2009-07-30 04:38:19 +0000 | [diff] [blame] | 162 | if (map6 == NULL) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 163 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 164 | map6->def.type = NETLBL_NLTYPE_UNLABELED; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 165 | map6->list.addr = *addr6; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 166 | map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0]; |
| 167 | map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1]; |
| 168 | map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2]; |
| 169 | map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3]; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 170 | map6->list.mask = *mask6; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 171 | map6->list.valid = 1; |
Dan Carpenter | 42ca020 | 2011-11-23 21:18:20 +0000 | [diff] [blame] | 172 | ret_val = netlbl_af6list_add(&map6->list, |
| 173 | &addrmap->list6); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 174 | if (ret_val != 0) |
| 175 | goto cfg_unlbl_map_add_failure; |
| 176 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 177 | } |
| 178 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 179 | default: |
| 180 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 181 | } |
| 182 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 183 | entry->def.addrsel = addrmap; |
| 184 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 185 | } else { |
| 186 | ret_val = -EINVAL; |
| 187 | goto cfg_unlbl_map_add_failure; |
| 188 | } |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 189 | |
| 190 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 191 | if (ret_val != 0) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 192 | goto cfg_unlbl_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 193 | |
| 194 | return 0; |
| 195 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 196 | cfg_unlbl_map_add_failure: |
Julia Lawall | 4794323 | 2009-07-27 06:15:43 +0000 | [diff] [blame] | 197 | kfree(entry->domain); |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 198 | kfree(entry); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 199 | kfree(addrmap); |
| 200 | kfree(map4); |
| 201 | kfree(map6); |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 202 | return ret_val; |
| 203 | } |
| 204 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 205 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 206 | /** |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 207 | * netlbl_cfg_unlbl_static_add - Adds a new static label |
| 208 | * @net: network namespace |
| 209 | * @dev_name: interface name |
| 210 | * @addr: IP address in network byte order (struct in[6]_addr) |
| 211 | * @mask: address mask in network byte order (struct in[6]_addr) |
| 212 | * @family: address family |
| 213 | * @secid: LSM secid value for the entry |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 214 | * @audit_info: NetLabel audit information |
| 215 | * |
| 216 | * Description: |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 217 | * Adds a new NetLabel static label to be used when protocol provided labels |
| 218 | * are not present on incoming traffic. If @dev_name is NULL then the default |
| 219 | * interface will be used. Returns zero on success, negative values on failure. |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 220 | * |
| 221 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 222 | int netlbl_cfg_unlbl_static_add(struct net *net, |
| 223 | const char *dev_name, |
| 224 | const void *addr, |
| 225 | const void *mask, |
| 226 | u16 family, |
| 227 | u32 secid, |
| 228 | struct netlbl_audit *audit_info) |
| 229 | { |
| 230 | u32 addr_len; |
| 231 | |
| 232 | switch (family) { |
| 233 | case AF_INET: |
| 234 | addr_len = sizeof(struct in_addr); |
| 235 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 236 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 237 | case AF_INET6: |
| 238 | addr_len = sizeof(struct in6_addr); |
| 239 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 240 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 241 | default: |
| 242 | return -EPFNOSUPPORT; |
| 243 | } |
| 244 | |
| 245 | return netlbl_unlhsh_add(net, |
| 246 | dev_name, addr, mask, addr_len, |
| 247 | secid, audit_info); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * netlbl_cfg_unlbl_static_del - Removes an existing static label |
| 252 | * @net: network namespace |
| 253 | * @dev_name: interface name |
| 254 | * @addr: IP address in network byte order (struct in[6]_addr) |
| 255 | * @mask: address mask in network byte order (struct in[6]_addr) |
| 256 | * @family: address family |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 257 | * @audit_info: NetLabel audit information |
| 258 | * |
| 259 | * Description: |
| 260 | * Removes an existing NetLabel static label used when protocol provided labels |
| 261 | * are not present on incoming traffic. If @dev_name is NULL then the default |
| 262 | * interface will be used. Returns zero on success, negative values on failure. |
| 263 | * |
| 264 | */ |
| 265 | int netlbl_cfg_unlbl_static_del(struct net *net, |
| 266 | const char *dev_name, |
| 267 | const void *addr, |
| 268 | const void *mask, |
| 269 | u16 family, |
| 270 | struct netlbl_audit *audit_info) |
| 271 | { |
| 272 | u32 addr_len; |
| 273 | |
| 274 | switch (family) { |
| 275 | case AF_INET: |
| 276 | addr_len = sizeof(struct in_addr); |
| 277 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 278 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 279 | case AF_INET6: |
| 280 | addr_len = sizeof(struct in6_addr); |
| 281 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 282 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 283 | default: |
| 284 | return -EPFNOSUPPORT; |
| 285 | } |
| 286 | |
| 287 | return netlbl_unlhsh_remove(net, |
| 288 | dev_name, addr, mask, addr_len, |
| 289 | audit_info); |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition |
| 294 | * @doi_def: CIPSO DOI definition |
| 295 | * @audit_info: NetLabel audit information |
| 296 | * |
| 297 | * Description: |
| 298 | * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on |
| 299 | * success and negative values on failure. |
| 300 | * |
| 301 | */ |
| 302 | int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, |
| 303 | struct netlbl_audit *audit_info) |
| 304 | { |
| 305 | return cipso_v4_doi_add(doi_def, audit_info); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition |
| 310 | * @doi: CIPSO DOI |
| 311 | * @audit_info: NetLabel audit information |
| 312 | * |
| 313 | * Description: |
| 314 | * Remove an existing CIPSO DOI definition matching @doi. Returns zero on |
| 315 | * success and negative values on failure. |
| 316 | * |
| 317 | */ |
| 318 | void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info) |
| 319 | { |
| 320 | cipso_v4_doi_remove(doi, audit_info); |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping |
| 325 | * @doi: the CIPSO DOI |
| 326 | * @domain: the domain mapping to add |
| 327 | * @addr: IP address |
| 328 | * @mask: IP address mask |
| 329 | * @audit_info: NetLabel audit information |
| 330 | * |
| 331 | * Description: |
| 332 | * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel |
| 333 | * subsystem. A @domain value of NULL adds a new default domain mapping. |
| 334 | * Returns zero on success, negative values on failure. |
| 335 | * |
| 336 | */ |
| 337 | int netlbl_cfg_cipsov4_map_add(u32 doi, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 338 | const char *domain, |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 339 | const struct in_addr *addr, |
| 340 | const struct in_addr *mask, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 341 | struct netlbl_audit *audit_info) |
| 342 | { |
| 343 | int ret_val = -ENOMEM; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 344 | struct cipso_v4_doi *doi_def; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 345 | struct netlbl_dom_map *entry; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 346 | struct netlbl_domaddr_map *addrmap = NULL; |
| 347 | struct netlbl_domaddr4_map *addrinfo = NULL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 348 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 349 | doi_def = cipso_v4_doi_getdef(doi); |
| 350 | if (doi_def == NULL) |
| 351 | return -ENOENT; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 352 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 353 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 354 | if (entry == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 355 | goto out_entry; |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 356 | entry->family = AF_INET; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 357 | if (domain != NULL) { |
| 358 | entry->domain = kstrdup(domain, GFP_ATOMIC); |
| 359 | if (entry->domain == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 360 | goto out_domain; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 361 | } |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 362 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 363 | if (addr == NULL && mask == NULL) { |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 364 | entry->def.cipso = doi_def; |
| 365 | entry->def.type = NETLBL_NLTYPE_CIPSOV4; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 366 | } else if (addr != NULL && mask != NULL) { |
| 367 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); |
| 368 | if (addrmap == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 369 | goto out_addrmap; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 370 | INIT_LIST_HEAD(&addrmap->list4); |
| 371 | INIT_LIST_HEAD(&addrmap->list6); |
| 372 | |
| 373 | addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC); |
| 374 | if (addrinfo == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 375 | goto out_addrinfo; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 376 | addrinfo->def.cipso = doi_def; |
| 377 | addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 378 | addrinfo->list.addr = addr->s_addr & mask->s_addr; |
| 379 | addrinfo->list.mask = mask->s_addr; |
| 380 | addrinfo->list.valid = 1; |
| 381 | ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4); |
| 382 | if (ret_val != 0) |
| 383 | goto cfg_cipsov4_map_add_failure; |
| 384 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 385 | entry->def.addrsel = addrmap; |
| 386 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 387 | } else { |
| 388 | ret_val = -EINVAL; |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 389 | goto out_addrmap; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 390 | } |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 391 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 392 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 393 | if (ret_val != 0) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 394 | goto cfg_cipsov4_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 395 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 396 | return 0; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 397 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 398 | cfg_cipsov4_map_add_failure: |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 399 | kfree(addrinfo); |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 400 | out_addrinfo: |
| 401 | kfree(addrmap); |
| 402 | out_addrmap: |
| 403 | kfree(entry->domain); |
| 404 | out_domain: |
| 405 | kfree(entry); |
| 406 | out_entry: |
| 407 | cipso_v4_doi_putdef(doi_def); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 408 | return ret_val; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 409 | } |
| 410 | |
Huw Davies | 3f09354 | 2016-06-27 15:06:18 -0400 | [diff] [blame] | 411 | /** |
| 412 | * netlbl_cfg_calipso_add - Add a new CALIPSO DOI definition |
| 413 | * @doi_def: CALIPSO DOI definition |
| 414 | * @audit_info: NetLabel audit information |
| 415 | * |
| 416 | * Description: |
| 417 | * Add a new CALIPSO DOI definition as defined by @doi_def. Returns zero on |
| 418 | * success and negative values on failure. |
| 419 | * |
| 420 | */ |
| 421 | int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, |
| 422 | struct netlbl_audit *audit_info) |
| 423 | { |
| 424 | #if IS_ENABLED(CONFIG_IPV6) |
| 425 | return calipso_doi_add(doi_def, audit_info); |
| 426 | #else /* IPv6 */ |
| 427 | return -ENOSYS; |
| 428 | #endif /* IPv6 */ |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * netlbl_cfg_calipso_del - Remove an existing CALIPSO DOI definition |
| 433 | * @doi: CALIPSO DOI |
| 434 | * @audit_info: NetLabel audit information |
| 435 | * |
| 436 | * Description: |
| 437 | * Remove an existing CALIPSO DOI definition matching @doi. Returns zero on |
| 438 | * success and negative values on failure. |
| 439 | * |
| 440 | */ |
| 441 | void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info) |
| 442 | { |
| 443 | #if IS_ENABLED(CONFIG_IPV6) |
| 444 | calipso_doi_remove(doi, audit_info); |
| 445 | #endif /* IPv6 */ |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * netlbl_cfg_calipso_map_add - Add a new CALIPSO DOI mapping |
| 450 | * @doi: the CALIPSO DOI |
| 451 | * @domain: the domain mapping to add |
| 452 | * @addr: IP address |
| 453 | * @mask: IP address mask |
| 454 | * @audit_info: NetLabel audit information |
| 455 | * |
| 456 | * Description: |
| 457 | * Add a new NetLabel/LSM domain mapping for the given CALIPSO DOI to the |
| 458 | * NetLabel subsystem. A @domain value of NULL adds a new default domain |
| 459 | * mapping. Returns zero on success, negative values on failure. |
| 460 | * |
| 461 | */ |
| 462 | int netlbl_cfg_calipso_map_add(u32 doi, |
| 463 | const char *domain, |
| 464 | const struct in6_addr *addr, |
| 465 | const struct in6_addr *mask, |
| 466 | struct netlbl_audit *audit_info) |
| 467 | { |
| 468 | #if IS_ENABLED(CONFIG_IPV6) |
| 469 | int ret_val = -ENOMEM; |
| 470 | struct calipso_doi *doi_def; |
| 471 | struct netlbl_dom_map *entry; |
| 472 | struct netlbl_domaddr_map *addrmap = NULL; |
| 473 | struct netlbl_domaddr6_map *addrinfo = NULL; |
| 474 | |
| 475 | doi_def = calipso_doi_getdef(doi); |
| 476 | if (doi_def == NULL) |
| 477 | return -ENOENT; |
| 478 | |
| 479 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 480 | if (entry == NULL) |
| 481 | goto out_entry; |
| 482 | entry->family = AF_INET6; |
| 483 | if (domain != NULL) { |
| 484 | entry->domain = kstrdup(domain, GFP_ATOMIC); |
| 485 | if (entry->domain == NULL) |
| 486 | goto out_domain; |
| 487 | } |
| 488 | |
| 489 | if (addr == NULL && mask == NULL) { |
| 490 | entry->def.calipso = doi_def; |
| 491 | entry->def.type = NETLBL_NLTYPE_CALIPSO; |
| 492 | } else if (addr != NULL && mask != NULL) { |
| 493 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); |
| 494 | if (addrmap == NULL) |
| 495 | goto out_addrmap; |
| 496 | INIT_LIST_HEAD(&addrmap->list4); |
| 497 | INIT_LIST_HEAD(&addrmap->list6); |
| 498 | |
| 499 | addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC); |
| 500 | if (addrinfo == NULL) |
| 501 | goto out_addrinfo; |
| 502 | addrinfo->def.calipso = doi_def; |
| 503 | addrinfo->def.type = NETLBL_NLTYPE_CALIPSO; |
| 504 | addrinfo->list.addr = *addr; |
| 505 | addrinfo->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
| 506 | addrinfo->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; |
| 507 | addrinfo->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; |
| 508 | addrinfo->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; |
| 509 | addrinfo->list.mask = *mask; |
| 510 | addrinfo->list.valid = 1; |
| 511 | ret_val = netlbl_af6list_add(&addrinfo->list, &addrmap->list6); |
| 512 | if (ret_val != 0) |
| 513 | goto cfg_calipso_map_add_failure; |
| 514 | |
| 515 | entry->def.addrsel = addrmap; |
| 516 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
| 517 | } else { |
| 518 | ret_val = -EINVAL; |
| 519 | goto out_addrmap; |
| 520 | } |
| 521 | |
| 522 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 523 | if (ret_val != 0) |
| 524 | goto cfg_calipso_map_add_failure; |
| 525 | |
| 526 | return 0; |
| 527 | |
| 528 | cfg_calipso_map_add_failure: |
| 529 | kfree(addrinfo); |
| 530 | out_addrinfo: |
| 531 | kfree(addrmap); |
| 532 | out_addrmap: |
| 533 | kfree(entry->domain); |
| 534 | out_domain: |
| 535 | kfree(entry); |
| 536 | out_entry: |
| 537 | calipso_doi_putdef(doi_def); |
| 538 | return ret_val; |
| 539 | #else /* IPv6 */ |
| 540 | return -ENOSYS; |
| 541 | #endif /* IPv6 */ |
| 542 | } |
| 543 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 544 | /* |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 545 | * Security Attribute Functions |
| 546 | */ |
| 547 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 548 | #define _CM_F_NONE 0x00000000 |
| 549 | #define _CM_F_ALLOC 0x00000001 |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 550 | #define _CM_F_WALK 0x00000002 |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 551 | |
| 552 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 553 | * _netlbl_catmap_getnode - Get a individual node from a catmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 554 | * @catmap: pointer to the category bitmap |
| 555 | * @offset: the requested offset |
| 556 | * @cm_flags: catmap flags, see _CM_F_* |
| 557 | * @gfp_flags: memory allocation flags |
| 558 | * |
| 559 | * Description: |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 560 | * Iterate through the catmap looking for the node associated with @offset. |
| 561 | * If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node, |
| 562 | * one will be created and inserted into the catmap. If the _CM_F_WALK flag is |
| 563 | * set in @cm_flags and there is no associated node, the next highest node will |
| 564 | * be returned. Returns a pointer to the node on success, NULL on failure. |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 565 | * |
| 566 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 567 | static struct netlbl_lsm_catmap *_netlbl_catmap_getnode( |
| 568 | struct netlbl_lsm_catmap **catmap, |
| 569 | u32 offset, |
| 570 | unsigned int cm_flags, |
| 571 | gfp_t gfp_flags) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 572 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 573 | struct netlbl_lsm_catmap *iter = *catmap; |
| 574 | struct netlbl_lsm_catmap *prev = NULL; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 575 | |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 576 | if (iter == NULL) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 577 | goto catmap_getnode_alloc; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 578 | if (offset < iter->startbit) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 579 | goto catmap_getnode_walk; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 580 | while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) { |
| 581 | prev = iter; |
| 582 | iter = iter->next; |
| 583 | } |
| 584 | if (iter == NULL || offset < iter->startbit) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 585 | goto catmap_getnode_walk; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 586 | |
| 587 | return iter; |
| 588 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 589 | catmap_getnode_walk: |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 590 | if (cm_flags & _CM_F_WALK) |
| 591 | return iter; |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 592 | catmap_getnode_alloc: |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 593 | if (!(cm_flags & _CM_F_ALLOC)) |
| 594 | return NULL; |
| 595 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 596 | iter = netlbl_catmap_alloc(gfp_flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 597 | if (iter == NULL) |
| 598 | return NULL; |
| 599 | iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1); |
| 600 | |
| 601 | if (prev == NULL) { |
| 602 | iter->next = *catmap; |
| 603 | *catmap = iter; |
| 604 | } else { |
| 605 | iter->next = prev->next; |
| 606 | prev->next = iter; |
| 607 | } |
| 608 | |
| 609 | return iter; |
| 610 | } |
| 611 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 612 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 613 | * netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 614 | * @catmap: the category bitmap |
| 615 | * @offset: the offset to start searching at, in bits |
| 616 | * |
| 617 | * Description: |
| 618 | * This function walks a LSM secattr category bitmap starting at @offset and |
| 619 | * returns the spot of the first set bit or -ENOENT if no bits are set. |
| 620 | * |
| 621 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 622 | int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 623 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 624 | struct netlbl_lsm_catmap *iter = catmap; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 625 | u32 idx; |
| 626 | u32 bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 627 | NETLBL_CATMAP_MAPTYPE bitmap; |
| 628 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 629 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 630 | if (iter == NULL) |
| 631 | return -ENOENT; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 632 | if (offset > iter->startbit) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 633 | offset -= iter->startbit; |
| 634 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 635 | bit = offset % NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 636 | } else { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 637 | idx = 0; |
| 638 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 639 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 640 | bitmap = iter->bitmap[idx] >> bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 641 | |
| 642 | for (;;) { |
| 643 | if (bitmap != 0) { |
| 644 | while ((bitmap & NETLBL_CATMAP_BIT) == 0) { |
| 645 | bitmap >>= 1; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 646 | bit++; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 647 | } |
| 648 | return iter->startbit + |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 649 | (NETLBL_CATMAP_MAPSIZE * idx) + bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 650 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 651 | if (++idx >= NETLBL_CATMAP_MAPCNT) { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 652 | if (iter->next != NULL) { |
| 653 | iter = iter->next; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 654 | idx = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 655 | } else |
| 656 | return -ENOENT; |
| 657 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 658 | bitmap = iter->bitmap[idx]; |
| 659 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | return -ENOENT; |
| 663 | } |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 664 | EXPORT_SYMBOL(netlbl_catmap_walk); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 665 | |
| 666 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 667 | * netlbl_catmap_walkrng - Find the end of a string of set bits |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 668 | * @catmap: the category bitmap |
| 669 | * @offset: the offset to start searching at, in bits |
| 670 | * |
| 671 | * Description: |
| 672 | * This function walks a LSM secattr category bitmap starting at @offset and |
| 673 | * returns the spot of the first cleared bit or -ENOENT if the offset is past |
| 674 | * the end of the bitmap. |
| 675 | * |
| 676 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 677 | int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 678 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 679 | struct netlbl_lsm_catmap *iter; |
| 680 | struct netlbl_lsm_catmap *prev = NULL; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 681 | u32 idx; |
| 682 | u32 bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 683 | NETLBL_CATMAP_MAPTYPE bitmask; |
| 684 | NETLBL_CATMAP_MAPTYPE bitmap; |
| 685 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 686 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 687 | if (iter == NULL) |
| 688 | return -ENOENT; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 689 | if (offset > iter->startbit) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 690 | offset -= iter->startbit; |
| 691 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 692 | bit = offset % NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 693 | } else { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 694 | idx = 0; |
| 695 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 696 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 697 | bitmask = NETLBL_CATMAP_BIT << bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 698 | |
| 699 | for (;;) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 700 | bitmap = iter->bitmap[idx]; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 701 | while (bitmask != 0 && (bitmap & bitmask) != 0) { |
| 702 | bitmask <<= 1; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 703 | bit++; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 704 | } |
| 705 | |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 706 | if (prev && idx == 0 && bit == 0) |
| 707 | return prev->startbit + NETLBL_CATMAP_SIZE - 1; |
| 708 | else if (bitmask != 0) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 709 | return iter->startbit + |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 710 | (NETLBL_CATMAP_MAPSIZE * idx) + bit - 1; |
| 711 | else if (++idx >= NETLBL_CATMAP_MAPCNT) { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 712 | if (iter->next == NULL) |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 713 | return iter->startbit + NETLBL_CATMAP_SIZE - 1; |
| 714 | prev = iter; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 715 | iter = iter->next; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 716 | idx = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 717 | } |
| 718 | bitmask = NETLBL_CATMAP_BIT; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 719 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | return -ENOENT; |
| 723 | } |
| 724 | |
| 725 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 726 | * netlbl_catmap_getlong - Export an unsigned long bitmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 727 | * @catmap: pointer to the category bitmap |
| 728 | * @offset: pointer to the requested offset |
| 729 | * @bitmap: the exported bitmap |
| 730 | * |
| 731 | * Description: |
| 732 | * Export a bitmap with an offset greater than or equal to @offset and return |
| 733 | * it in @bitmap. The @offset must be aligned to an unsigned long and will be |
| 734 | * updated on return if different from what was requested; if the catmap is |
| 735 | * empty at the requested offset and beyond, the @offset is set to (u32)-1. |
| 736 | * Returns zero on sucess, negative values on failure. |
| 737 | * |
| 738 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 739 | int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, |
| 740 | u32 *offset, |
| 741 | unsigned long *bitmap) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 742 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 743 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 744 | u32 off = *offset; |
| 745 | u32 idx; |
| 746 | |
| 747 | /* only allow aligned offsets */ |
| 748 | if ((off & (BITS_PER_LONG - 1)) != 0) |
| 749 | return -EINVAL; |
| 750 | |
Paolo Abeni | 0f5ae0f | 2020-05-12 14:43:14 +0200 | [diff] [blame] | 751 | /* a null catmap is equivalent to an empty one */ |
| 752 | if (!catmap) { |
| 753 | *offset = (u32)-1; |
| 754 | return 0; |
| 755 | } |
| 756 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 757 | if (off < catmap->startbit) { |
| 758 | off = catmap->startbit; |
| 759 | *offset = off; |
| 760 | } |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 761 | iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 762 | if (iter == NULL) { |
| 763 | *offset = (u32)-1; |
| 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | if (off < iter->startbit) { |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 768 | *offset = iter->startbit; |
| 769 | off = 0; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 770 | } else |
| 771 | off -= iter->startbit; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 772 | idx = off / NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 773 | *bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 779 | * netlbl_catmap_setbit - Set a bit in a LSM secattr catmap |
Paul Moore | 41c3bd2 | 2014-08-01 11:17:03 -0400 | [diff] [blame] | 780 | * @catmap: pointer to the category bitmap |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 781 | * @bit: the bit to set |
| 782 | * @flags: memory allocation flags |
| 783 | * |
| 784 | * Description: |
| 785 | * Set the bit specified by @bit in @catmap. Returns zero on success, |
| 786 | * negative values on failure. |
| 787 | * |
| 788 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 789 | int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, |
| 790 | u32 bit, |
| 791 | gfp_t flags) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 792 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 793 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 794 | u32 idx; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 795 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 796 | iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 797 | if (iter == NULL) |
| 798 | return -ENOMEM; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 799 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 800 | bit -= iter->startbit; |
| 801 | idx = bit / NETLBL_CATMAP_MAPSIZE; |
| 802 | iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 803 | |
| 804 | return 0; |
| 805 | } |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 806 | EXPORT_SYMBOL(netlbl_catmap_setbit); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 807 | |
| 808 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 809 | * netlbl_catmap_setrng - Set a range of bits in a LSM secattr catmap |
Paul Moore | 41c3bd2 | 2014-08-01 11:17:03 -0400 | [diff] [blame] | 810 | * @catmap: pointer to the category bitmap |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 811 | * @start: the starting bit |
| 812 | * @end: the last bit in the string |
| 813 | * @flags: memory allocation flags |
| 814 | * |
| 815 | * Description: |
| 816 | * Set a range of bits, starting at @start and ending with @end. Returns zero |
| 817 | * on success, negative values on failure. |
| 818 | * |
| 819 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 820 | int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, |
| 821 | u32 start, |
| 822 | u32 end, |
| 823 | gfp_t flags) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 824 | { |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 825 | int rc = 0; |
| 826 | u32 spot = start; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 827 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 828 | while (rc == 0 && spot <= end) { |
Janak Desai | 341e0cb | 2016-03-28 11:09:46 -0400 | [diff] [blame] | 829 | if (((spot & (BITS_PER_LONG - 1)) == 0) && |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 830 | ((end - spot) > BITS_PER_LONG)) { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 831 | rc = netlbl_catmap_setlong(catmap, |
| 832 | spot, |
| 833 | (unsigned long)-1, |
| 834 | flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 835 | spot += BITS_PER_LONG; |
| 836 | } else |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 837 | rc = netlbl_catmap_setbit(catmap, spot++, flags); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 838 | } |
| 839 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 840 | return rc; |
| 841 | } |
| 842 | |
| 843 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 844 | * netlbl_catmap_setlong - Import an unsigned long bitmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 845 | * @catmap: pointer to the category bitmap |
| 846 | * @offset: offset to the start of the imported bitmap |
| 847 | * @bitmap: the bitmap to import |
| 848 | * @flags: memory allocation flags |
| 849 | * |
| 850 | * Description: |
| 851 | * Import the bitmap specified in @bitmap into @catmap, using the offset |
| 852 | * in @offset. The offset must be aligned to an unsigned long. Returns zero |
| 853 | * on success, negative values on failure. |
| 854 | * |
| 855 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 856 | int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, |
| 857 | u32 offset, |
| 858 | unsigned long bitmap, |
| 859 | gfp_t flags) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 860 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 861 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 862 | u32 idx; |
| 863 | |
| 864 | /* only allow aligned offsets */ |
| 865 | if ((offset & (BITS_PER_LONG - 1)) != 0) |
| 866 | return -EINVAL; |
| 867 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 868 | iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC, flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 869 | if (iter == NULL) |
| 870 | return -ENOMEM; |
| 871 | |
| 872 | offset -= iter->startbit; |
| 873 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 874 | iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE); |
| 875 | |
| 876 | return 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 877 | } |
| 878 | |
Huw Davies | 3faa8f9 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 879 | /* Bitmap functions |
| 880 | */ |
| 881 | |
| 882 | /** |
| 883 | * netlbl_bitmap_walk - Walk a bitmap looking for a bit |
| 884 | * @bitmap: the bitmap |
| 885 | * @bitmap_len: length in bits |
| 886 | * @offset: starting offset |
| 887 | * @state: if non-zero, look for a set (1) bit else look for a cleared (0) bit |
| 888 | * |
| 889 | * Description: |
| 890 | * Starting at @offset, walk the bitmap from left to right until either the |
| 891 | * desired bit is found or we reach the end. Return the bit offset, -1 if |
| 892 | * not found, or -2 if error. |
| 893 | */ |
| 894 | int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len, |
| 895 | u32 offset, u8 state) |
| 896 | { |
| 897 | u32 bit_spot; |
| 898 | u32 byte_offset; |
| 899 | unsigned char bitmask; |
| 900 | unsigned char byte; |
| 901 | |
| 902 | byte_offset = offset / 8; |
| 903 | byte = bitmap[byte_offset]; |
| 904 | bit_spot = offset; |
| 905 | bitmask = 0x80 >> (offset % 8); |
| 906 | |
| 907 | while (bit_spot < bitmap_len) { |
| 908 | if ((state && (byte & bitmask) == bitmask) || |
| 909 | (state == 0 && (byte & bitmask) == 0)) |
| 910 | return bit_spot; |
| 911 | |
Paul Moore | fcfe700 | 2019-02-25 19:06:06 -0500 | [diff] [blame] | 912 | if (++bit_spot >= bitmap_len) |
| 913 | return -1; |
Huw Davies | 3faa8f9 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 914 | bitmask >>= 1; |
| 915 | if (bitmask == 0) { |
| 916 | byte = bitmap[++byte_offset]; |
| 917 | bitmask = 0x80; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | return -1; |
| 922 | } |
| 923 | EXPORT_SYMBOL(netlbl_bitmap_walk); |
| 924 | |
| 925 | /** |
| 926 | * netlbl_bitmap_setbit - Sets a single bit in a bitmap |
| 927 | * @bitmap: the bitmap |
| 928 | * @bit: the bit |
| 929 | * @state: if non-zero, set the bit (1) else clear the bit (0) |
| 930 | * |
| 931 | * Description: |
| 932 | * Set a single bit in the bitmask. Returns zero on success, negative values |
| 933 | * on error. |
| 934 | */ |
| 935 | void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state) |
| 936 | { |
| 937 | u32 byte_spot; |
| 938 | u8 bitmask; |
| 939 | |
| 940 | /* gcc always rounds to zero when doing integer division */ |
| 941 | byte_spot = bit / 8; |
| 942 | bitmask = 0x80 >> (bit % 8); |
| 943 | if (state) |
| 944 | bitmap[byte_spot] |= bitmask; |
| 945 | else |
| 946 | bitmap[byte_spot] &= ~bitmask; |
| 947 | } |
| 948 | EXPORT_SYMBOL(netlbl_bitmap_setbit); |
| 949 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 950 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 951 | * LSM Functions |
| 952 | */ |
| 953 | |
| 954 | /** |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 955 | * netlbl_enabled - Determine if the NetLabel subsystem is enabled |
| 956 | * |
| 957 | * Description: |
| 958 | * The LSM can use this function to determine if it should use NetLabel |
| 959 | * security attributes in it's enforcement mechanism. Currently, NetLabel is |
| 960 | * considered to be enabled when it's configuration contains a valid setup for |
| 961 | * at least one labeled protocol (i.e. NetLabel can understand incoming |
| 962 | * labeled packets of at least one type); otherwise NetLabel is considered to |
| 963 | * be disabled. |
| 964 | * |
| 965 | */ |
| 966 | int netlbl_enabled(void) |
| 967 | { |
| 968 | /* At some point we probably want to expose this mechanism to the user |
| 969 | * as well so that admins can toggle NetLabel regardless of the |
| 970 | * configuration */ |
Paul Moore | c783f1c | 2008-01-29 08:37:52 -0500 | [diff] [blame] | 971 | return (atomic_read(&netlabel_mgmt_protocount) > 0); |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | /** |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 975 | * netlbl_sock_setattr - Label a socket using the correct protocol |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 976 | * @sk: the socket to label |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 977 | * @family: protocol family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 978 | * @secattr: the security attributes |
| 979 | * |
| 980 | * Description: |
| 981 | * Attach the correct label to the given socket using the security attributes |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 982 | * specified in @secattr. This function requires exclusive access to @sk, |
| 983 | * which means it either needs to be in the process of being created or locked. |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 984 | * Returns zero on success, -EDESTADDRREQ if the domain is configured to use |
| 985 | * network address selectors (can't blindly label the socket), and negative |
| 986 | * values on all other failures. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 987 | * |
| 988 | */ |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 989 | int netlbl_sock_setattr(struct sock *sk, |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 990 | u16 family, |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 991 | const struct netlbl_lsm_secattr *secattr) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 992 | { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 993 | int ret_val; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 994 | struct netlbl_dom_map *dom_entry; |
| 995 | |
| 996 | rcu_read_lock(); |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 997 | dom_entry = netlbl_domhsh_getentry(secattr->domain, family); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 998 | if (dom_entry == NULL) { |
| 999 | ret_val = -ENOENT; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1000 | goto socket_setattr_return; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1001 | } |
| 1002 | switch (family) { |
| 1003 | case AF_INET: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1004 | switch (dom_entry->def.type) { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1005 | case NETLBL_NLTYPE_ADDRSELECT: |
| 1006 | ret_val = -EDESTADDRREQ; |
| 1007 | break; |
| 1008 | case NETLBL_NLTYPE_CIPSOV4: |
| 1009 | ret_val = cipso_v4_sock_setattr(sk, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1010 | dom_entry->def.cipso, |
| 1011 | secattr); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1012 | break; |
| 1013 | case NETLBL_NLTYPE_UNLABELED: |
| 1014 | ret_val = 0; |
| 1015 | break; |
| 1016 | default: |
| 1017 | ret_val = -ENOENT; |
| 1018 | } |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1019 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1020 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1021 | case AF_INET6: |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1022 | switch (dom_entry->def.type) { |
| 1023 | case NETLBL_NLTYPE_ADDRSELECT: |
| 1024 | ret_val = -EDESTADDRREQ; |
| 1025 | break; |
| 1026 | case NETLBL_NLTYPE_CALIPSO: |
| 1027 | ret_val = calipso_sock_setattr(sk, |
| 1028 | dom_entry->def.calipso, |
| 1029 | secattr); |
| 1030 | break; |
| 1031 | case NETLBL_NLTYPE_UNLABELED: |
| 1032 | ret_val = 0; |
| 1033 | break; |
| 1034 | default: |
| 1035 | ret_val = -ENOENT; |
| 1036 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1037 | break; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1038 | #endif /* IPv6 */ |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1039 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1040 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | socket_setattr_return: |
| 1044 | rcu_read_unlock(); |
| 1045 | return ret_val; |
| 1046 | } |
| 1047 | |
| 1048 | /** |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1049 | * netlbl_sock_delattr - Delete all the NetLabel labels on a socket |
| 1050 | * @sk: the socket |
| 1051 | * |
| 1052 | * Description: |
| 1053 | * Remove all the NetLabel labeling from @sk. The caller is responsible for |
| 1054 | * ensuring that @sk is locked. |
| 1055 | * |
| 1056 | */ |
| 1057 | void netlbl_sock_delattr(struct sock *sk) |
| 1058 | { |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 1059 | switch (sk->sk_family) { |
| 1060 | case AF_INET: |
| 1061 | cipso_v4_sock_delattr(sk); |
| 1062 | break; |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1063 | #if IS_ENABLED(CONFIG_IPV6) |
| 1064 | case AF_INET6: |
| 1065 | calipso_sock_delattr(sk); |
| 1066 | break; |
| 1067 | #endif /* IPv6 */ |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 1068 | } |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1069 | } |
| 1070 | |
| 1071 | /** |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 1072 | * netlbl_sock_getattr - Determine the security attributes of a sock |
| 1073 | * @sk: the sock |
| 1074 | * @secattr: the security attributes |
| 1075 | * |
| 1076 | * Description: |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 1077 | * Examines the given sock to see if any NetLabel style labeling has been |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 1078 | * applied to the sock, if so it parses the socket label and returns the |
| 1079 | * security attributes in @secattr. Returns zero on success, negative values |
| 1080 | * on failure. |
| 1081 | * |
| 1082 | */ |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1083 | int netlbl_sock_getattr(struct sock *sk, |
| 1084 | struct netlbl_lsm_secattr *secattr) |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 1085 | { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1086 | int ret_val; |
| 1087 | |
| 1088 | switch (sk->sk_family) { |
| 1089 | case AF_INET: |
| 1090 | ret_val = cipso_v4_sock_getattr(sk, secattr); |
| 1091 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1092 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1093 | case AF_INET6: |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1094 | ret_val = calipso_sock_getattr(sk, secattr); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1095 | break; |
| 1096 | #endif /* IPv6 */ |
| 1097 | default: |
| 1098 | ret_val = -EPROTONOSUPPORT; |
| 1099 | } |
| 1100 | |
| 1101 | return ret_val; |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | /** |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1105 | * netlbl_conn_setattr - Label a connected socket using the correct protocol |
| 1106 | * @sk: the socket to label |
| 1107 | * @addr: the destination address |
| 1108 | * @secattr: the security attributes |
| 1109 | * |
| 1110 | * Description: |
| 1111 | * Attach the correct label to the given connected socket using the security |
| 1112 | * attributes specified in @secattr. The caller is responsible for ensuring |
| 1113 | * that @sk is locked. Returns zero on success, negative values on failure. |
| 1114 | * |
| 1115 | */ |
| 1116 | int netlbl_conn_setattr(struct sock *sk, |
| 1117 | struct sockaddr *addr, |
| 1118 | const struct netlbl_lsm_secattr *secattr) |
| 1119 | { |
| 1120 | int ret_val; |
| 1121 | struct sockaddr_in *addr4; |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1122 | #if IS_ENABLED(CONFIG_IPV6) |
| 1123 | struct sockaddr_in6 *addr6; |
| 1124 | #endif |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1125 | struct netlbl_dommap_def *entry; |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1126 | |
| 1127 | rcu_read_lock(); |
| 1128 | switch (addr->sa_family) { |
| 1129 | case AF_INET: |
| 1130 | addr4 = (struct sockaddr_in *)addr; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1131 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
| 1132 | addr4->sin_addr.s_addr); |
| 1133 | if (entry == NULL) { |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1134 | ret_val = -ENOENT; |
| 1135 | goto conn_setattr_return; |
| 1136 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1137 | switch (entry->type) { |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1138 | case NETLBL_NLTYPE_CIPSOV4: |
| 1139 | ret_val = cipso_v4_sock_setattr(sk, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1140 | entry->cipso, secattr); |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1141 | break; |
| 1142 | case NETLBL_NLTYPE_UNLABELED: |
| 1143 | /* just delete the protocols we support for right now |
| 1144 | * but we could remove other protocols if needed */ |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1145 | netlbl_sock_delattr(sk); |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1146 | ret_val = 0; |
| 1147 | break; |
| 1148 | default: |
| 1149 | ret_val = -ENOENT; |
| 1150 | } |
| 1151 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1152 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1153 | case AF_INET6: |
Huw Davies | ceba183 | 2016-06-27 15:02:51 -0400 | [diff] [blame] | 1154 | addr6 = (struct sockaddr_in6 *)addr; |
| 1155 | entry = netlbl_domhsh_getentry_af6(secattr->domain, |
| 1156 | &addr6->sin6_addr); |
| 1157 | if (entry == NULL) { |
| 1158 | ret_val = -ENOENT; |
| 1159 | goto conn_setattr_return; |
| 1160 | } |
| 1161 | switch (entry->type) { |
| 1162 | case NETLBL_NLTYPE_CALIPSO: |
| 1163 | ret_val = calipso_sock_setattr(sk, |
| 1164 | entry->calipso, secattr); |
| 1165 | break; |
| 1166 | case NETLBL_NLTYPE_UNLABELED: |
| 1167 | /* just delete the protocols we support for right now |
| 1168 | * but we could remove other protocols if needed */ |
| 1169 | netlbl_sock_delattr(sk); |
| 1170 | ret_val = 0; |
| 1171 | break; |
| 1172 | default: |
| 1173 | ret_val = -ENOENT; |
| 1174 | } |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1175 | break; |
| 1176 | #endif /* IPv6 */ |
| 1177 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1178 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | conn_setattr_return: |
| 1182 | rcu_read_unlock(); |
| 1183 | return ret_val; |
| 1184 | } |
| 1185 | |
| 1186 | /** |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1187 | * netlbl_req_setattr - Label a request socket using the correct protocol |
| 1188 | * @req: the request socket to label |
| 1189 | * @secattr: the security attributes |
| 1190 | * |
| 1191 | * Description: |
| 1192 | * Attach the correct label to the given socket using the security attributes |
| 1193 | * specified in @secattr. Returns zero on success, negative values on failure. |
| 1194 | * |
| 1195 | */ |
| 1196 | int netlbl_req_setattr(struct request_sock *req, |
| 1197 | const struct netlbl_lsm_secattr *secattr) |
| 1198 | { |
| 1199 | int ret_val; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1200 | struct netlbl_dommap_def *entry; |
Huw Davies | e1adea9 | 2016-06-27 15:05:29 -0400 | [diff] [blame] | 1201 | struct inet_request_sock *ireq = inet_rsk(req); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1202 | |
| 1203 | rcu_read_lock(); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1204 | switch (req->rsk_ops->family) { |
| 1205 | case AF_INET: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1206 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
Huw Davies | e1adea9 | 2016-06-27 15:05:29 -0400 | [diff] [blame] | 1207 | ireq->ir_rmt_addr); |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1208 | if (entry == NULL) { |
| 1209 | ret_val = -ENOENT; |
| 1210 | goto req_setattr_return; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1211 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1212 | switch (entry->type) { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1213 | case NETLBL_NLTYPE_CIPSOV4: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1214 | ret_val = cipso_v4_req_setattr(req, |
| 1215 | entry->cipso, secattr); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1216 | break; |
| 1217 | case NETLBL_NLTYPE_UNLABELED: |
Huw Davies | e1adea9 | 2016-06-27 15:05:29 -0400 | [diff] [blame] | 1218 | netlbl_req_delattr(req); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1219 | ret_val = 0; |
| 1220 | break; |
| 1221 | default: |
| 1222 | ret_val = -ENOENT; |
| 1223 | } |
| 1224 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1225 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1226 | case AF_INET6: |
Huw Davies | e1adea9 | 2016-06-27 15:05:29 -0400 | [diff] [blame] | 1227 | entry = netlbl_domhsh_getentry_af6(secattr->domain, |
| 1228 | &ireq->ir_v6_rmt_addr); |
| 1229 | if (entry == NULL) { |
| 1230 | ret_val = -ENOENT; |
| 1231 | goto req_setattr_return; |
| 1232 | } |
| 1233 | switch (entry->type) { |
| 1234 | case NETLBL_NLTYPE_CALIPSO: |
| 1235 | ret_val = calipso_req_setattr(req, |
| 1236 | entry->calipso, secattr); |
| 1237 | break; |
| 1238 | case NETLBL_NLTYPE_UNLABELED: |
| 1239 | netlbl_req_delattr(req); |
| 1240 | ret_val = 0; |
| 1241 | break; |
| 1242 | default: |
| 1243 | ret_val = -ENOENT; |
| 1244 | } |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1245 | break; |
| 1246 | #endif /* IPv6 */ |
| 1247 | default: |
| 1248 | ret_val = -EPROTONOSUPPORT; |
| 1249 | } |
| 1250 | |
| 1251 | req_setattr_return: |
| 1252 | rcu_read_unlock(); |
| 1253 | return ret_val; |
| 1254 | } |
| 1255 | |
| 1256 | /** |
Paul Moore | 07feee8 | 2009-03-27 17:10:54 -0400 | [diff] [blame] | 1257 | * netlbl_req_delattr - Delete all the NetLabel labels on a socket |
| 1258 | * @req: the socket |
| 1259 | * |
| 1260 | * Description: |
| 1261 | * Remove all the NetLabel labeling from @req. |
| 1262 | * |
| 1263 | */ |
| 1264 | void netlbl_req_delattr(struct request_sock *req) |
| 1265 | { |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 1266 | switch (req->rsk_ops->family) { |
| 1267 | case AF_INET: |
| 1268 | cipso_v4_req_delattr(req); |
| 1269 | break; |
Huw Davies | e1adea9 | 2016-06-27 15:05:29 -0400 | [diff] [blame] | 1270 | #if IS_ENABLED(CONFIG_IPV6) |
| 1271 | case AF_INET6: |
| 1272 | calipso_req_delattr(req); |
| 1273 | break; |
| 1274 | #endif /* IPv6 */ |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 1275 | } |
Paul Moore | 07feee8 | 2009-03-27 17:10:54 -0400 | [diff] [blame] | 1276 | } |
| 1277 | |
| 1278 | /** |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1279 | * netlbl_skbuff_setattr - Label a packet using the correct protocol |
| 1280 | * @skb: the packet |
| 1281 | * @family: protocol family |
| 1282 | * @secattr: the security attributes |
| 1283 | * |
| 1284 | * Description: |
| 1285 | * Attach the correct label to the given packet using the security attributes |
| 1286 | * specified in @secattr. Returns zero on success, negative values on failure. |
| 1287 | * |
| 1288 | */ |
| 1289 | int netlbl_skbuff_setattr(struct sk_buff *skb, |
| 1290 | u16 family, |
| 1291 | const struct netlbl_lsm_secattr *secattr) |
| 1292 | { |
| 1293 | int ret_val; |
| 1294 | struct iphdr *hdr4; |
Huw Davies | 2917f57 | 2016-06-27 15:06:15 -0400 | [diff] [blame] | 1295 | #if IS_ENABLED(CONFIG_IPV6) |
| 1296 | struct ipv6hdr *hdr6; |
| 1297 | #endif |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1298 | struct netlbl_dommap_def *entry; |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1299 | |
| 1300 | rcu_read_lock(); |
| 1301 | switch (family) { |
| 1302 | case AF_INET: |
| 1303 | hdr4 = ip_hdr(skb); |
Huw Davies | 2917f57 | 2016-06-27 15:06:15 -0400 | [diff] [blame] | 1304 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
| 1305 | hdr4->daddr); |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1306 | if (entry == NULL) { |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1307 | ret_val = -ENOENT; |
| 1308 | goto skbuff_setattr_return; |
| 1309 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1310 | switch (entry->type) { |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1311 | case NETLBL_NLTYPE_CIPSOV4: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1312 | ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso, |
| 1313 | secattr); |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1314 | break; |
| 1315 | case NETLBL_NLTYPE_UNLABELED: |
| 1316 | /* just delete the protocols we support for right now |
| 1317 | * but we could remove other protocols if needed */ |
| 1318 | ret_val = cipso_v4_skbuff_delattr(skb); |
| 1319 | break; |
| 1320 | default: |
| 1321 | ret_val = -ENOENT; |
| 1322 | } |
| 1323 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1324 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1325 | case AF_INET6: |
Huw Davies | 2917f57 | 2016-06-27 15:06:15 -0400 | [diff] [blame] | 1326 | hdr6 = ipv6_hdr(skb); |
| 1327 | entry = netlbl_domhsh_getentry_af6(secattr->domain, |
| 1328 | &hdr6->daddr); |
| 1329 | if (entry == NULL) { |
| 1330 | ret_val = -ENOENT; |
| 1331 | goto skbuff_setattr_return; |
| 1332 | } |
| 1333 | switch (entry->type) { |
| 1334 | case NETLBL_NLTYPE_CALIPSO: |
| 1335 | ret_val = calipso_skbuff_setattr(skb, entry->calipso, |
| 1336 | secattr); |
| 1337 | break; |
| 1338 | case NETLBL_NLTYPE_UNLABELED: |
| 1339 | /* just delete the protocols we support for right now |
| 1340 | * but we could remove other protocols if needed */ |
| 1341 | ret_val = calipso_skbuff_delattr(skb); |
| 1342 | break; |
| 1343 | default: |
| 1344 | ret_val = -ENOENT; |
| 1345 | } |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1346 | break; |
| 1347 | #endif /* IPv6 */ |
| 1348 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1349 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1350 | } |
| 1351 | |
| 1352 | skbuff_setattr_return: |
| 1353 | rcu_read_unlock(); |
| 1354 | return ret_val; |
| 1355 | } |
| 1356 | |
| 1357 | /** |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1358 | * netlbl_skbuff_getattr - Determine the security attributes of a packet |
| 1359 | * @skb: the packet |
Paul Moore | 75e2291 | 2008-01-29 08:38:04 -0500 | [diff] [blame] | 1360 | * @family: protocol family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1361 | * @secattr: the security attributes |
| 1362 | * |
| 1363 | * Description: |
| 1364 | * Examines the given packet to see if a recognized form of packet labeling |
| 1365 | * is present, if so it parses the packet label and returns the security |
| 1366 | * attributes in @secattr. Returns zero on success, negative values on |
| 1367 | * failure. |
| 1368 | * |
| 1369 | */ |
| 1370 | int netlbl_skbuff_getattr(const struct sk_buff *skb, |
Paul Moore | 75e2291 | 2008-01-29 08:38:04 -0500 | [diff] [blame] | 1371 | u16 family, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1372 | struct netlbl_lsm_secattr *secattr) |
| 1373 | { |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1374 | unsigned char *ptr; |
| 1375 | |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1376 | switch (family) { |
| 1377 | case AF_INET: |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1378 | ptr = cipso_v4_optptr(skb); |
| 1379 | if (ptr && cipso_v4_getattr(ptr, secattr) == 0) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1380 | return 0; |
| 1381 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1382 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1383 | case AF_INET6: |
Huw Davies | 2917f57 | 2016-06-27 15:06:15 -0400 | [diff] [blame] | 1384 | ptr = calipso_optptr(skb); |
| 1385 | if (ptr && calipso_getattr(ptr, secattr) == 0) |
| 1386 | return 0; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1387 | break; |
| 1388 | #endif /* IPv6 */ |
| 1389 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1390 | |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 1391 | return netlbl_unlabel_getattr(skb, family, secattr); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1392 | } |
| 1393 | |
| 1394 | /** |
| 1395 | * netlbl_skbuff_err - Handle a LSM error on a sk_buff |
| 1396 | * @skb: the packet |
Huw Davies | a04e71f | 2016-06-27 15:06:16 -0400 | [diff] [blame] | 1397 | * @family: the family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1398 | * @error: the error code |
Paul Moore | dfaebe9 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 1399 | * @gateway: true if host is acting as a gateway, false otherwise |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1400 | * |
| 1401 | * Description: |
| 1402 | * Deal with a LSM problem when handling the packet in @skb, typically this is |
| 1403 | * a permission denied problem (-EACCES). The correct action is determined |
| 1404 | * according to the packet's labeling protocol. |
| 1405 | * |
| 1406 | */ |
Huw Davies | a04e71f | 2016-06-27 15:06:16 -0400 | [diff] [blame] | 1407 | void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1408 | { |
Huw Davies | a04e71f | 2016-06-27 15:06:16 -0400 | [diff] [blame] | 1409 | switch (family) { |
| 1410 | case AF_INET: |
| 1411 | if (cipso_v4_optptr(skb)) |
| 1412 | cipso_v4_error(skb, error, gateway); |
| 1413 | break; |
| 1414 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1415 | } |
| 1416 | |
| 1417 | /** |
| 1418 | * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches |
| 1419 | * |
| 1420 | * Description: |
| 1421 | * For all of the NetLabel protocols that support some form of label mapping |
| 1422 | * cache, invalidate the cache. Returns zero on success, negative values on |
| 1423 | * error. |
| 1424 | * |
| 1425 | */ |
| 1426 | void netlbl_cache_invalidate(void) |
| 1427 | { |
| 1428 | cipso_v4_cache_invalidate(); |
Huw Davies | 4fee524 | 2016-06-27 15:06:17 -0400 | [diff] [blame] | 1429 | #if IS_ENABLED(CONFIG_IPV6) |
| 1430 | calipso_cache_invalidate(); |
| 1431 | #endif /* IPv6 */ |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1432 | } |
| 1433 | |
| 1434 | /** |
| 1435 | * netlbl_cache_add - Add an entry to a NetLabel protocol cache |
| 1436 | * @skb: the packet |
Huw Davies | 4fee524 | 2016-06-27 15:06:17 -0400 | [diff] [blame] | 1437 | * @family: the family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1438 | * @secattr: the packet's security attributes |
| 1439 | * |
| 1440 | * Description: |
| 1441 | * Add the LSM security attributes for the given packet to the underlying |
| 1442 | * NetLabel protocol's label mapping cache. Returns zero on success, negative |
| 1443 | * values on error. |
| 1444 | * |
| 1445 | */ |
Huw Davies | 4fee524 | 2016-06-27 15:06:17 -0400 | [diff] [blame] | 1446 | int netlbl_cache_add(const struct sk_buff *skb, u16 family, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1447 | const struct netlbl_lsm_secattr *secattr) |
| 1448 | { |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1449 | unsigned char *ptr; |
| 1450 | |
Paul Moore | 701a90b | 2006-11-17 17:38:46 -0500 | [diff] [blame] | 1451 | if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1452 | return -ENOMSG; |
| 1453 | |
Huw Davies | 4fee524 | 2016-06-27 15:06:17 -0400 | [diff] [blame] | 1454 | switch (family) { |
| 1455 | case AF_INET: |
| 1456 | ptr = cipso_v4_optptr(skb); |
| 1457 | if (ptr) |
| 1458 | return cipso_v4_cache_add(ptr, secattr); |
| 1459 | break; |
| 1460 | #if IS_ENABLED(CONFIG_IPV6) |
| 1461 | case AF_INET6: |
| 1462 | ptr = calipso_optptr(skb); |
| 1463 | if (ptr) |
| 1464 | return calipso_cache_add(ptr, secattr); |
| 1465 | break; |
| 1466 | #endif /* IPv6 */ |
| 1467 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1468 | return -ENOMSG; |
| 1469 | } |
| 1470 | |
| 1471 | /* |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 1472 | * Protocol Engine Functions |
| 1473 | */ |
| 1474 | |
| 1475 | /** |
| 1476 | * netlbl_audit_start - Start an audit message |
| 1477 | * @type: audit message type |
| 1478 | * @audit_info: NetLabel audit information |
| 1479 | * |
| 1480 | * Description: |
| 1481 | * Start an audit message using the type specified in @type and fill the audit |
| 1482 | * message with some fields common to all NetLabel audit messages. This |
| 1483 | * function should only be used by protocol engines, not LSMs. Returns a |
| 1484 | * pointer to the audit buffer on success, NULL on failure. |
| 1485 | * |
| 1486 | */ |
| 1487 | struct audit_buffer *netlbl_audit_start(int type, |
| 1488 | struct netlbl_audit *audit_info) |
| 1489 | { |
| 1490 | return netlbl_audit_start_common(type, audit_info); |
| 1491 | } |
Huw Davies | cb72d38 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 1492 | EXPORT_SYMBOL(netlbl_audit_start); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 1493 | |
| 1494 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1495 | * Setup Functions |
| 1496 | */ |
| 1497 | |
| 1498 | /** |
| 1499 | * netlbl_init - Initialize NetLabel |
| 1500 | * |
| 1501 | * Description: |
| 1502 | * Perform the required NetLabel initialization before first use. |
| 1503 | * |
| 1504 | */ |
| 1505 | static int __init netlbl_init(void) |
| 1506 | { |
| 1507 | int ret_val; |
| 1508 | |
| 1509 | printk(KERN_INFO "NetLabel: Initializing\n"); |
| 1510 | printk(KERN_INFO "NetLabel: domain hash size = %u\n", |
| 1511 | (1 << NETLBL_DOMHSH_BITSIZE)); |
Paul Moore | bcd5e1a | 2017-01-06 14:26:54 -0500 | [diff] [blame] | 1512 | printk(KERN_INFO "NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO\n"); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1513 | |
| 1514 | ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE); |
| 1515 | if (ret_val != 0) |
| 1516 | goto init_failure; |
| 1517 | |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 1518 | ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE); |
| 1519 | if (ret_val != 0) |
| 1520 | goto init_failure; |
| 1521 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1522 | ret_val = netlbl_netlink_init(); |
| 1523 | if (ret_val != 0) |
| 1524 | goto init_failure; |
| 1525 | |
| 1526 | ret_val = netlbl_unlabel_defconf(); |
| 1527 | if (ret_val != 0) |
| 1528 | goto init_failure; |
| 1529 | printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n"); |
| 1530 | |
| 1531 | return 0; |
| 1532 | |
| 1533 | init_failure: |
| 1534 | panic("NetLabel: failed to initialize properly (%d)\n", ret_val); |
| 1535 | } |
| 1536 | |
| 1537 | subsys_initcall(netlbl_init); |