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> |
| 40 | #include <asm/bug.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 41 | #include <linux/atomic.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 42 | |
| 43 | #include "netlabel_domainhash.h" |
| 44 | #include "netlabel_unlabeled.h" |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 45 | #include "netlabel_cipso_v4.h" |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 46 | #include "netlabel_user.h" |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 47 | #include "netlabel_mgmt.h" |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 48 | #include "netlabel_addrlist.h" |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 49 | |
| 50 | /* |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 51 | * Configuration Functions |
| 52 | */ |
| 53 | |
| 54 | /** |
| 55 | * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping |
| 56 | * @domain: the domain mapping to remove |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 57 | * @family: address family |
| 58 | * @addr: IP address |
| 59 | * @mask: IP address mask |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 60 | * @audit_info: NetLabel audit information |
| 61 | * |
| 62 | * Description: |
| 63 | * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the |
| 64 | * default domain mapping to be removed. Returns zero on success, negative |
| 65 | * values on failure. |
| 66 | * |
| 67 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 68 | int netlbl_cfg_map_del(const char *domain, |
| 69 | u16 family, |
| 70 | const void *addr, |
| 71 | const void *mask, |
| 72 | struct netlbl_audit *audit_info) |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 73 | { |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 74 | if (addr == NULL && mask == NULL) { |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 75 | return netlbl_domhsh_remove(domain, family, audit_info); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 76 | } else if (addr != NULL && mask != NULL) { |
| 77 | switch (family) { |
| 78 | case AF_INET: |
| 79 | return netlbl_domhsh_remove_af4(domain, addr, mask, |
| 80 | audit_info); |
| 81 | default: |
| 82 | return -EPFNOSUPPORT; |
| 83 | } |
| 84 | } else |
| 85 | return -EINVAL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /** |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 89 | * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 90 | * @domain: the domain mapping to add |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 91 | * @family: address family |
| 92 | * @addr: IP address |
| 93 | * @mask: IP address mask |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 94 | * @audit_info: NetLabel audit information |
| 95 | * |
| 96 | * Description: |
| 97 | * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL |
| 98 | * causes a new default domain mapping to be added. Returns zero on success, |
| 99 | * negative values on failure. |
| 100 | * |
| 101 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 102 | int netlbl_cfg_unlbl_map_add(const char *domain, |
| 103 | u16 family, |
| 104 | const void *addr, |
| 105 | const void *mask, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 106 | struct netlbl_audit *audit_info) |
| 107 | { |
| 108 | int ret_val = -ENOMEM; |
| 109 | struct netlbl_dom_map *entry; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 110 | struct netlbl_domaddr_map *addrmap = NULL; |
| 111 | struct netlbl_domaddr4_map *map4 = NULL; |
| 112 | struct netlbl_domaddr6_map *map6 = NULL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 113 | |
| 114 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 115 | if (entry == NULL) |
Paul Moore | 948a724 | 2008-10-10 10:16:30 -0400 | [diff] [blame] | 116 | return -ENOMEM; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 117 | if (domain != NULL) { |
| 118 | entry->domain = kstrdup(domain, GFP_ATOMIC); |
| 119 | if (entry->domain == NULL) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 120 | goto cfg_unlbl_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 121 | } |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 122 | entry->family = family; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 123 | |
| 124 | if (addr == NULL && mask == NULL) |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 125 | entry->def.type = NETLBL_NLTYPE_UNLABELED; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 126 | else if (addr != NULL && mask != NULL) { |
| 127 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); |
| 128 | if (addrmap == NULL) |
| 129 | goto cfg_unlbl_map_add_failure; |
| 130 | INIT_LIST_HEAD(&addrmap->list4); |
| 131 | INIT_LIST_HEAD(&addrmap->list6); |
| 132 | |
| 133 | switch (family) { |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 134 | case AF_INET: { |
| 135 | const struct in_addr *addr4 = addr; |
| 136 | const struct in_addr *mask4 = mask; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 137 | map4 = kzalloc(sizeof(*map4), GFP_ATOMIC); |
| 138 | if (map4 == NULL) |
| 139 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 140 | map4->def.type = NETLBL_NLTYPE_UNLABELED; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 141 | map4->list.addr = addr4->s_addr & mask4->s_addr; |
| 142 | map4->list.mask = mask4->s_addr; |
| 143 | map4->list.valid = 1; |
| 144 | ret_val = netlbl_af4list_add(&map4->list, |
| 145 | &addrmap->list4); |
| 146 | if (ret_val != 0) |
| 147 | goto cfg_unlbl_map_add_failure; |
| 148 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 149 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 150 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 151 | case AF_INET6: { |
| 152 | const struct in6_addr *addr6 = addr; |
| 153 | const struct in6_addr *mask6 = mask; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 154 | map6 = kzalloc(sizeof(*map6), GFP_ATOMIC); |
Julia Lawall | ca7daea | 2009-07-30 04:38:19 +0000 | [diff] [blame] | 155 | if (map6 == NULL) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 156 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 157 | map6->def.type = NETLBL_NLTYPE_UNLABELED; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 158 | map6->list.addr = *addr6; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 159 | map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0]; |
| 160 | map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1]; |
| 161 | map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2]; |
| 162 | map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3]; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 163 | map6->list.mask = *mask6; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 164 | map6->list.valid = 1; |
Dan Carpenter | 42ca020 | 2011-11-23 21:18:20 +0000 | [diff] [blame] | 165 | ret_val = netlbl_af6list_add(&map6->list, |
| 166 | &addrmap->list6); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 167 | if (ret_val != 0) |
| 168 | goto cfg_unlbl_map_add_failure; |
| 169 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 170 | } |
| 171 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 172 | default: |
| 173 | goto cfg_unlbl_map_add_failure; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 174 | } |
| 175 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 176 | entry->def.addrsel = addrmap; |
| 177 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 178 | } else { |
| 179 | ret_val = -EINVAL; |
| 180 | goto cfg_unlbl_map_add_failure; |
| 181 | } |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 182 | |
| 183 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 184 | if (ret_val != 0) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 185 | goto cfg_unlbl_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 186 | |
| 187 | return 0; |
| 188 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 189 | cfg_unlbl_map_add_failure: |
Julia Lawall | 4794323 | 2009-07-27 06:15:43 +0000 | [diff] [blame] | 190 | kfree(entry->domain); |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 191 | kfree(entry); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 192 | kfree(addrmap); |
| 193 | kfree(map4); |
| 194 | kfree(map6); |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 195 | return ret_val; |
| 196 | } |
| 197 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 198 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 199 | /** |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 200 | * netlbl_cfg_unlbl_static_add - Adds a new static label |
| 201 | * @net: network namespace |
| 202 | * @dev_name: interface name |
| 203 | * @addr: IP address in network byte order (struct in[6]_addr) |
| 204 | * @mask: address mask in network byte order (struct in[6]_addr) |
| 205 | * @family: address family |
| 206 | * @secid: LSM secid value for the entry |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 207 | * @audit_info: NetLabel audit information |
| 208 | * |
| 209 | * Description: |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 210 | * Adds a new NetLabel static label to be used when protocol provided labels |
| 211 | * are not present on incoming traffic. If @dev_name is NULL then the default |
| 212 | * interface will be used. Returns zero on success, negative values on failure. |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 213 | * |
| 214 | */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 215 | int netlbl_cfg_unlbl_static_add(struct net *net, |
| 216 | const char *dev_name, |
| 217 | const void *addr, |
| 218 | const void *mask, |
| 219 | u16 family, |
| 220 | u32 secid, |
| 221 | struct netlbl_audit *audit_info) |
| 222 | { |
| 223 | u32 addr_len; |
| 224 | |
| 225 | switch (family) { |
| 226 | case AF_INET: |
| 227 | addr_len = sizeof(struct in_addr); |
| 228 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 229 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 230 | case AF_INET6: |
| 231 | addr_len = sizeof(struct in6_addr); |
| 232 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 233 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 234 | default: |
| 235 | return -EPFNOSUPPORT; |
| 236 | } |
| 237 | |
| 238 | return netlbl_unlhsh_add(net, |
| 239 | dev_name, addr, mask, addr_len, |
| 240 | secid, audit_info); |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * netlbl_cfg_unlbl_static_del - Removes an existing static label |
| 245 | * @net: network namespace |
| 246 | * @dev_name: interface name |
| 247 | * @addr: IP address in network byte order (struct in[6]_addr) |
| 248 | * @mask: address mask in network byte order (struct in[6]_addr) |
| 249 | * @family: address family |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 250 | * @audit_info: NetLabel audit information |
| 251 | * |
| 252 | * Description: |
| 253 | * Removes an existing NetLabel static label used when protocol provided labels |
| 254 | * are not present on incoming traffic. If @dev_name is NULL then the default |
| 255 | * interface will be used. Returns zero on success, negative values on failure. |
| 256 | * |
| 257 | */ |
| 258 | int netlbl_cfg_unlbl_static_del(struct net *net, |
| 259 | const char *dev_name, |
| 260 | const void *addr, |
| 261 | const void *mask, |
| 262 | u16 family, |
| 263 | struct netlbl_audit *audit_info) |
| 264 | { |
| 265 | u32 addr_len; |
| 266 | |
| 267 | switch (family) { |
| 268 | case AF_INET: |
| 269 | addr_len = sizeof(struct in_addr); |
| 270 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 271 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 272 | case AF_INET6: |
| 273 | addr_len = sizeof(struct in6_addr); |
| 274 | break; |
Paul Moore | 1281bc2 | 2011-11-29 10:10:54 +0000 | [diff] [blame] | 275 | #endif /* IPv6 */ |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 276 | default: |
| 277 | return -EPFNOSUPPORT; |
| 278 | } |
| 279 | |
| 280 | return netlbl_unlhsh_remove(net, |
| 281 | dev_name, addr, mask, addr_len, |
| 282 | audit_info); |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition |
| 287 | * @doi_def: CIPSO DOI definition |
| 288 | * @audit_info: NetLabel audit information |
| 289 | * |
| 290 | * Description: |
| 291 | * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on |
| 292 | * success and negative values on failure. |
| 293 | * |
| 294 | */ |
| 295 | int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, |
| 296 | struct netlbl_audit *audit_info) |
| 297 | { |
| 298 | return cipso_v4_doi_add(doi_def, audit_info); |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition |
| 303 | * @doi: CIPSO DOI |
| 304 | * @audit_info: NetLabel audit information |
| 305 | * |
| 306 | * Description: |
| 307 | * Remove an existing CIPSO DOI definition matching @doi. Returns zero on |
| 308 | * success and negative values on failure. |
| 309 | * |
| 310 | */ |
| 311 | void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info) |
| 312 | { |
| 313 | cipso_v4_doi_remove(doi, audit_info); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping |
| 318 | * @doi: the CIPSO DOI |
| 319 | * @domain: the domain mapping to add |
| 320 | * @addr: IP address |
| 321 | * @mask: IP address mask |
| 322 | * @audit_info: NetLabel audit information |
| 323 | * |
| 324 | * Description: |
| 325 | * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel |
| 326 | * subsystem. A @domain value of NULL adds a new default domain mapping. |
| 327 | * Returns zero on success, negative values on failure. |
| 328 | * |
| 329 | */ |
| 330 | int netlbl_cfg_cipsov4_map_add(u32 doi, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 331 | const char *domain, |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 332 | const struct in_addr *addr, |
| 333 | const struct in_addr *mask, |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 334 | struct netlbl_audit *audit_info) |
| 335 | { |
| 336 | int ret_val = -ENOMEM; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 337 | struct cipso_v4_doi *doi_def; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 338 | struct netlbl_dom_map *entry; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 339 | struct netlbl_domaddr_map *addrmap = NULL; |
| 340 | struct netlbl_domaddr4_map *addrinfo = NULL; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 341 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 342 | doi_def = cipso_v4_doi_getdef(doi); |
| 343 | if (doi_def == NULL) |
| 344 | return -ENOENT; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 345 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 346 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
| 347 | if (entry == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 348 | goto out_entry; |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 349 | entry->family = AF_INET; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 350 | if (domain != NULL) { |
| 351 | entry->domain = kstrdup(domain, GFP_ATOMIC); |
| 352 | if (entry->domain == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 353 | goto out_domain; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 354 | } |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 355 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 356 | if (addr == NULL && mask == NULL) { |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 357 | entry->def.cipso = doi_def; |
| 358 | entry->def.type = NETLBL_NLTYPE_CIPSOV4; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 359 | } else if (addr != NULL && mask != NULL) { |
| 360 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); |
| 361 | if (addrmap == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 362 | goto out_addrmap; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 363 | INIT_LIST_HEAD(&addrmap->list4); |
| 364 | INIT_LIST_HEAD(&addrmap->list6); |
| 365 | |
| 366 | addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC); |
| 367 | if (addrinfo == NULL) |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 368 | goto out_addrinfo; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 369 | addrinfo->def.cipso = doi_def; |
| 370 | addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 371 | addrinfo->list.addr = addr->s_addr & mask->s_addr; |
| 372 | addrinfo->list.mask = mask->s_addr; |
| 373 | addrinfo->list.valid = 1; |
| 374 | ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4); |
| 375 | if (ret_val != 0) |
| 376 | goto cfg_cipsov4_map_add_failure; |
| 377 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 378 | entry->def.addrsel = addrmap; |
| 379 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 380 | } else { |
| 381 | ret_val = -EINVAL; |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 382 | goto out_addrmap; |
Paul Moore | b1edeb1 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 383 | } |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 384 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 385 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 386 | if (ret_val != 0) |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 387 | goto cfg_cipsov4_map_add_failure; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 388 | |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 389 | return 0; |
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 | cfg_cipsov4_map_add_failure: |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 392 | kfree(addrinfo); |
Julia Lawall | 94a80d6 | 2011-08-11 00:06:04 +0000 | [diff] [blame] | 393 | out_addrinfo: |
| 394 | kfree(addrmap); |
| 395 | out_addrmap: |
| 396 | kfree(entry->domain); |
| 397 | out_domain: |
| 398 | kfree(entry); |
| 399 | out_entry: |
| 400 | cipso_v4_doi_putdef(doi_def); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 401 | return ret_val; |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 402 | } |
| 403 | |
Paul Moore | eda61d3 | 2008-02-04 22:29:47 -0800 | [diff] [blame] | 404 | /* |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 405 | * Security Attribute Functions |
| 406 | */ |
| 407 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 408 | #define _CM_F_NONE 0x00000000 |
| 409 | #define _CM_F_ALLOC 0x00000001 |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 410 | #define _CM_F_WALK 0x00000002 |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 411 | |
| 412 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 413 | * _netlbl_catmap_getnode - Get a individual node from a catmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 414 | * @catmap: pointer to the category bitmap |
| 415 | * @offset: the requested offset |
| 416 | * @cm_flags: catmap flags, see _CM_F_* |
| 417 | * @gfp_flags: memory allocation flags |
| 418 | * |
| 419 | * Description: |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 420 | * Iterate through the catmap looking for the node associated with @offset. |
| 421 | * If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node, |
| 422 | * one will be created and inserted into the catmap. If the _CM_F_WALK flag is |
| 423 | * set in @cm_flags and there is no associated node, the next highest node will |
| 424 | * 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] | 425 | * |
| 426 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 427 | static struct netlbl_lsm_catmap *_netlbl_catmap_getnode( |
| 428 | struct netlbl_lsm_catmap **catmap, |
| 429 | u32 offset, |
| 430 | unsigned int cm_flags, |
| 431 | gfp_t gfp_flags) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 432 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 433 | struct netlbl_lsm_catmap *iter = *catmap; |
| 434 | struct netlbl_lsm_catmap *prev = NULL; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 435 | |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 436 | if (iter == NULL) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 437 | goto catmap_getnode_alloc; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 438 | if (offset < iter->startbit) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 439 | goto catmap_getnode_walk; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 440 | while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) { |
| 441 | prev = iter; |
| 442 | iter = iter->next; |
| 443 | } |
| 444 | if (iter == NULL || offset < iter->startbit) |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 445 | goto catmap_getnode_walk; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 446 | |
| 447 | return iter; |
| 448 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 449 | catmap_getnode_walk: |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 450 | if (cm_flags & _CM_F_WALK) |
| 451 | return iter; |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 452 | catmap_getnode_alloc: |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 453 | if (!(cm_flags & _CM_F_ALLOC)) |
| 454 | return NULL; |
| 455 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 456 | iter = netlbl_catmap_alloc(gfp_flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 457 | if (iter == NULL) |
| 458 | return NULL; |
| 459 | iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1); |
| 460 | |
| 461 | if (prev == NULL) { |
| 462 | iter->next = *catmap; |
| 463 | *catmap = iter; |
| 464 | } else { |
| 465 | iter->next = prev->next; |
| 466 | prev->next = iter; |
| 467 | } |
| 468 | |
| 469 | return iter; |
| 470 | } |
| 471 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 472 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 473 | * netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 474 | * @catmap: the category bitmap |
| 475 | * @offset: the offset to start searching at, in bits |
| 476 | * |
| 477 | * Description: |
| 478 | * This function walks a LSM secattr category bitmap starting at @offset and |
| 479 | * returns the spot of the first set bit or -ENOENT if no bits are set. |
| 480 | * |
| 481 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 482 | int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 483 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 484 | struct netlbl_lsm_catmap *iter = catmap; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 485 | u32 idx; |
| 486 | u32 bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 487 | NETLBL_CATMAP_MAPTYPE bitmap; |
| 488 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 489 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 490 | if (iter == NULL) |
| 491 | return -ENOENT; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 492 | if (offset > iter->startbit) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 493 | offset -= iter->startbit; |
| 494 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 495 | bit = offset % NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 496 | } else { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 497 | idx = 0; |
| 498 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 499 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 500 | bitmap = iter->bitmap[idx] >> bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 501 | |
| 502 | for (;;) { |
| 503 | if (bitmap != 0) { |
| 504 | while ((bitmap & NETLBL_CATMAP_BIT) == 0) { |
| 505 | bitmap >>= 1; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 506 | bit++; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 507 | } |
| 508 | return iter->startbit + |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 509 | (NETLBL_CATMAP_MAPSIZE * idx) + bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 510 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 511 | if (++idx >= NETLBL_CATMAP_MAPCNT) { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 512 | if (iter->next != NULL) { |
| 513 | iter = iter->next; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 514 | idx = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 515 | } else |
| 516 | return -ENOENT; |
| 517 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 518 | bitmap = iter->bitmap[idx]; |
| 519 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | return -ENOENT; |
| 523 | } |
| 524 | |
| 525 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 526 | * netlbl_catmap_walkrng - Find the end of a string of set bits |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 527 | * @catmap: the category bitmap |
| 528 | * @offset: the offset to start searching at, in bits |
| 529 | * |
| 530 | * Description: |
| 531 | * This function walks a LSM secattr category bitmap starting at @offset and |
| 532 | * returns the spot of the first cleared bit or -ENOENT if the offset is past |
| 533 | * the end of the bitmap. |
| 534 | * |
| 535 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 536 | int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 537 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 538 | struct netlbl_lsm_catmap *iter; |
| 539 | struct netlbl_lsm_catmap *prev = NULL; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 540 | u32 idx; |
| 541 | u32 bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 542 | NETLBL_CATMAP_MAPTYPE bitmask; |
| 543 | NETLBL_CATMAP_MAPTYPE bitmap; |
| 544 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 545 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 546 | if (iter == NULL) |
| 547 | return -ENOENT; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 548 | if (offset > iter->startbit) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 549 | offset -= iter->startbit; |
| 550 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 551 | bit = offset % NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 552 | } else { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 553 | idx = 0; |
| 554 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 555 | } |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 556 | bitmask = NETLBL_CATMAP_BIT << bit; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 557 | |
| 558 | for (;;) { |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 559 | bitmap = iter->bitmap[idx]; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 560 | while (bitmask != 0 && (bitmap & bitmask) != 0) { |
| 561 | bitmask <<= 1; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 562 | bit++; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 563 | } |
| 564 | |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 565 | if (prev && idx == 0 && bit == 0) |
| 566 | return prev->startbit + NETLBL_CATMAP_SIZE - 1; |
| 567 | else if (bitmask != 0) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 568 | return iter->startbit + |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 569 | (NETLBL_CATMAP_MAPSIZE * idx) + bit - 1; |
| 570 | else if (++idx >= NETLBL_CATMAP_MAPCNT) { |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 571 | if (iter->next == NULL) |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 572 | return iter->startbit + NETLBL_CATMAP_SIZE - 1; |
| 573 | prev = iter; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 574 | iter = iter->next; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 575 | idx = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 576 | } |
| 577 | bitmask = NETLBL_CATMAP_BIT; |
Paul Moore | d960a61 | 2014-08-01 11:17:29 -0400 | [diff] [blame] | 578 | bit = 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | return -ENOENT; |
| 582 | } |
| 583 | |
| 584 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 585 | * netlbl_catmap_getlong - Export an unsigned long bitmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 586 | * @catmap: pointer to the category bitmap |
| 587 | * @offset: pointer to the requested offset |
| 588 | * @bitmap: the exported bitmap |
| 589 | * |
| 590 | * Description: |
| 591 | * Export a bitmap with an offset greater than or equal to @offset and return |
| 592 | * it in @bitmap. The @offset must be aligned to an unsigned long and will be |
| 593 | * updated on return if different from what was requested; if the catmap is |
| 594 | * empty at the requested offset and beyond, the @offset is set to (u32)-1. |
| 595 | * Returns zero on sucess, negative values on failure. |
| 596 | * |
| 597 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 598 | int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, |
| 599 | u32 *offset, |
| 600 | unsigned long *bitmap) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 601 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 602 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 603 | u32 off = *offset; |
| 604 | u32 idx; |
| 605 | |
| 606 | /* only allow aligned offsets */ |
| 607 | if ((off & (BITS_PER_LONG - 1)) != 0) |
| 608 | return -EINVAL; |
| 609 | |
| 610 | if (off < catmap->startbit) { |
| 611 | off = catmap->startbit; |
| 612 | *offset = off; |
| 613 | } |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 614 | iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 615 | if (iter == NULL) { |
| 616 | *offset = (u32)-1; |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | if (off < iter->startbit) { |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 621 | *offset = iter->startbit; |
| 622 | off = 0; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 623 | } else |
| 624 | off -= iter->startbit; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 625 | idx = off / NETLBL_CATMAP_MAPSIZE; |
Paul Moore | 50b8629 | 2016-06-09 10:56:02 -0400 | [diff] [blame] | 626 | *bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 627 | |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 632 | * netlbl_catmap_setbit - Set a bit in a LSM secattr catmap |
Paul Moore | 41c3bd2 | 2014-08-01 11:17:03 -0400 | [diff] [blame] | 633 | * @catmap: pointer to the category bitmap |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 634 | * @bit: the bit to set |
| 635 | * @flags: memory allocation flags |
| 636 | * |
| 637 | * Description: |
| 638 | * Set the bit specified by @bit in @catmap. Returns zero on success, |
| 639 | * negative values on failure. |
| 640 | * |
| 641 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 642 | int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, |
| 643 | u32 bit, |
| 644 | gfp_t flags) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 645 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 646 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 647 | u32 idx; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 648 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 649 | iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 650 | if (iter == NULL) |
| 651 | return -ENOMEM; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 652 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 653 | bit -= iter->startbit; |
| 654 | idx = bit / NETLBL_CATMAP_MAPSIZE; |
| 655 | iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 661 | * 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] | 662 | * @catmap: pointer to the category bitmap |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 663 | * @start: the starting bit |
| 664 | * @end: the last bit in the string |
| 665 | * @flags: memory allocation flags |
| 666 | * |
| 667 | * Description: |
| 668 | * Set a range of bits, starting at @start and ending with @end. Returns zero |
| 669 | * on success, negative values on failure. |
| 670 | * |
| 671 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 672 | int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, |
| 673 | u32 start, |
| 674 | u32 end, |
| 675 | gfp_t flags) |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 676 | { |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 677 | int rc = 0; |
| 678 | u32 spot = start; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 679 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 680 | while (rc == 0 && spot <= end) { |
Janak Desai | 341e0cb | 2016-03-28 11:09:46 -0400 | [diff] [blame] | 681 | if (((spot & (BITS_PER_LONG - 1)) == 0) && |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 682 | ((end - spot) > BITS_PER_LONG)) { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 683 | rc = netlbl_catmap_setlong(catmap, |
| 684 | spot, |
| 685 | (unsigned long)-1, |
| 686 | flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 687 | spot += BITS_PER_LONG; |
| 688 | } else |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 689 | rc = netlbl_catmap_setbit(catmap, spot++, flags); |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 690 | } |
| 691 | |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 692 | return rc; |
| 693 | } |
| 694 | |
| 695 | /** |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 696 | * netlbl_catmap_setlong - Import an unsigned long bitmap |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 697 | * @catmap: pointer to the category bitmap |
| 698 | * @offset: offset to the start of the imported bitmap |
| 699 | * @bitmap: the bitmap to import |
| 700 | * @flags: memory allocation flags |
| 701 | * |
| 702 | * Description: |
| 703 | * Import the bitmap specified in @bitmap into @catmap, using the offset |
| 704 | * in @offset. The offset must be aligned to an unsigned long. Returns zero |
| 705 | * on success, negative values on failure. |
| 706 | * |
| 707 | */ |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 708 | int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, |
| 709 | u32 offset, |
| 710 | unsigned long bitmap, |
| 711 | gfp_t flags) |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 712 | { |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 713 | struct netlbl_lsm_catmap *iter; |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 714 | u32 idx; |
| 715 | |
| 716 | /* only allow aligned offsets */ |
| 717 | if ((offset & (BITS_PER_LONG - 1)) != 0) |
| 718 | return -EINVAL; |
| 719 | |
Paul Moore | 4fbe63d | 2014-08-01 11:17:37 -0400 | [diff] [blame] | 720 | iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC, flags); |
Paul Moore | 4b8feff | 2014-08-01 11:17:17 -0400 | [diff] [blame] | 721 | if (iter == NULL) |
| 722 | return -ENOMEM; |
| 723 | |
| 724 | offset -= iter->startbit; |
| 725 | idx = offset / NETLBL_CATMAP_MAPSIZE; |
| 726 | iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE); |
| 727 | |
| 728 | return 0; |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 729 | } |
| 730 | |
Huw Davies | 3faa8f9 | 2016-06-27 15:02:51 -0400 | [diff] [blame^] | 731 | /* Bitmap functions |
| 732 | */ |
| 733 | |
| 734 | /** |
| 735 | * netlbl_bitmap_walk - Walk a bitmap looking for a bit |
| 736 | * @bitmap: the bitmap |
| 737 | * @bitmap_len: length in bits |
| 738 | * @offset: starting offset |
| 739 | * @state: if non-zero, look for a set (1) bit else look for a cleared (0) bit |
| 740 | * |
| 741 | * Description: |
| 742 | * Starting at @offset, walk the bitmap from left to right until either the |
| 743 | * desired bit is found or we reach the end. Return the bit offset, -1 if |
| 744 | * not found, or -2 if error. |
| 745 | */ |
| 746 | int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len, |
| 747 | u32 offset, u8 state) |
| 748 | { |
| 749 | u32 bit_spot; |
| 750 | u32 byte_offset; |
| 751 | unsigned char bitmask; |
| 752 | unsigned char byte; |
| 753 | |
| 754 | byte_offset = offset / 8; |
| 755 | byte = bitmap[byte_offset]; |
| 756 | bit_spot = offset; |
| 757 | bitmask = 0x80 >> (offset % 8); |
| 758 | |
| 759 | while (bit_spot < bitmap_len) { |
| 760 | if ((state && (byte & bitmask) == bitmask) || |
| 761 | (state == 0 && (byte & bitmask) == 0)) |
| 762 | return bit_spot; |
| 763 | |
| 764 | bit_spot++; |
| 765 | bitmask >>= 1; |
| 766 | if (bitmask == 0) { |
| 767 | byte = bitmap[++byte_offset]; |
| 768 | bitmask = 0x80; |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | return -1; |
| 773 | } |
| 774 | EXPORT_SYMBOL(netlbl_bitmap_walk); |
| 775 | |
| 776 | /** |
| 777 | * netlbl_bitmap_setbit - Sets a single bit in a bitmap |
| 778 | * @bitmap: the bitmap |
| 779 | * @bit: the bit |
| 780 | * @state: if non-zero, set the bit (1) else clear the bit (0) |
| 781 | * |
| 782 | * Description: |
| 783 | * Set a single bit in the bitmask. Returns zero on success, negative values |
| 784 | * on error. |
| 785 | */ |
| 786 | void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state) |
| 787 | { |
| 788 | u32 byte_spot; |
| 789 | u8 bitmask; |
| 790 | |
| 791 | /* gcc always rounds to zero when doing integer division */ |
| 792 | byte_spot = bit / 8; |
| 793 | bitmask = 0x80 >> (bit % 8); |
| 794 | if (state) |
| 795 | bitmap[byte_spot] |= bitmask; |
| 796 | else |
| 797 | bitmap[byte_spot] &= ~bitmask; |
| 798 | } |
| 799 | EXPORT_SYMBOL(netlbl_bitmap_setbit); |
| 800 | |
Paul Moore | 0275276 | 2006-11-29 13:18:18 -0500 | [diff] [blame] | 801 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 802 | * LSM Functions |
| 803 | */ |
| 804 | |
| 805 | /** |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 806 | * netlbl_enabled - Determine if the NetLabel subsystem is enabled |
| 807 | * |
| 808 | * Description: |
| 809 | * The LSM can use this function to determine if it should use NetLabel |
| 810 | * security attributes in it's enforcement mechanism. Currently, NetLabel is |
| 811 | * considered to be enabled when it's configuration contains a valid setup for |
| 812 | * at least one labeled protocol (i.e. NetLabel can understand incoming |
| 813 | * labeled packets of at least one type); otherwise NetLabel is considered to |
| 814 | * be disabled. |
| 815 | * |
| 816 | */ |
| 817 | int netlbl_enabled(void) |
| 818 | { |
| 819 | /* At some point we probably want to expose this mechanism to the user |
| 820 | * as well so that admins can toggle NetLabel regardless of the |
| 821 | * configuration */ |
Paul Moore | c783f1c | 2008-01-29 08:37:52 -0500 | [diff] [blame] | 822 | return (atomic_read(&netlabel_mgmt_protocount) > 0); |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /** |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 826 | * netlbl_sock_setattr - Label a socket using the correct protocol |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 827 | * @sk: the socket to label |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 828 | * @family: protocol family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 829 | * @secattr: the security attributes |
| 830 | * |
| 831 | * Description: |
| 832 | * Attach the correct label to the given socket using the security attributes |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 833 | * specified in @secattr. This function requires exclusive access to @sk, |
| 834 | * 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] | 835 | * Returns zero on success, -EDESTADDRREQ if the domain is configured to use |
| 836 | * network address selectors (can't blindly label the socket), and negative |
| 837 | * values on all other failures. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 838 | * |
| 839 | */ |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 840 | int netlbl_sock_setattr(struct sock *sk, |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 841 | u16 family, |
Paul Moore | ba6ff9f | 2007-06-07 18:37:15 -0700 | [diff] [blame] | 842 | const struct netlbl_lsm_secattr *secattr) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 843 | { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 844 | int ret_val; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 845 | struct netlbl_dom_map *dom_entry; |
| 846 | |
| 847 | rcu_read_lock(); |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 848 | dom_entry = netlbl_domhsh_getentry(secattr->domain, family); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 849 | if (dom_entry == NULL) { |
| 850 | ret_val = -ENOENT; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 851 | goto socket_setattr_return; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 852 | } |
| 853 | switch (family) { |
| 854 | case AF_INET: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 855 | switch (dom_entry->def.type) { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 856 | case NETLBL_NLTYPE_ADDRSELECT: |
| 857 | ret_val = -EDESTADDRREQ; |
| 858 | break; |
| 859 | case NETLBL_NLTYPE_CIPSOV4: |
| 860 | ret_val = cipso_v4_sock_setattr(sk, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 861 | dom_entry->def.cipso, |
| 862 | secattr); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 863 | break; |
| 864 | case NETLBL_NLTYPE_UNLABELED: |
| 865 | ret_val = 0; |
| 866 | break; |
| 867 | default: |
| 868 | ret_val = -ENOENT; |
| 869 | } |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 870 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 871 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 872 | case AF_INET6: |
| 873 | /* since we don't support any IPv6 labeling protocols right |
| 874 | * now we can optimize everything away until we do */ |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 875 | ret_val = 0; |
| 876 | break; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 877 | #endif /* IPv6 */ |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 878 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 879 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | socket_setattr_return: |
| 883 | rcu_read_unlock(); |
| 884 | return ret_val; |
| 885 | } |
| 886 | |
| 887 | /** |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 888 | * netlbl_sock_delattr - Delete all the NetLabel labels on a socket |
| 889 | * @sk: the socket |
| 890 | * |
| 891 | * Description: |
| 892 | * Remove all the NetLabel labeling from @sk. The caller is responsible for |
| 893 | * ensuring that @sk is locked. |
| 894 | * |
| 895 | */ |
| 896 | void netlbl_sock_delattr(struct sock *sk) |
| 897 | { |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 898 | switch (sk->sk_family) { |
| 899 | case AF_INET: |
| 900 | cipso_v4_sock_delattr(sk); |
| 901 | break; |
| 902 | } |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | /** |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 906 | * netlbl_sock_getattr - Determine the security attributes of a sock |
| 907 | * @sk: the sock |
| 908 | * @secattr: the security attributes |
| 909 | * |
| 910 | * Description: |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 911 | * 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] | 912 | * applied to the sock, if so it parses the socket label and returns the |
| 913 | * security attributes in @secattr. Returns zero on success, negative values |
| 914 | * on failure. |
| 915 | * |
| 916 | */ |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 917 | int netlbl_sock_getattr(struct sock *sk, |
| 918 | struct netlbl_lsm_secattr *secattr) |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 919 | { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 920 | int ret_val; |
| 921 | |
| 922 | switch (sk->sk_family) { |
| 923 | case AF_INET: |
| 924 | ret_val = cipso_v4_sock_getattr(sk, secattr); |
| 925 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 926 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 927 | case AF_INET6: |
| 928 | ret_val = -ENOMSG; |
| 929 | break; |
| 930 | #endif /* IPv6 */ |
| 931 | default: |
| 932 | ret_val = -EPROTONOSUPPORT; |
| 933 | } |
| 934 | |
| 935 | return ret_val; |
Paul Moore | 14a72f5 | 2006-09-25 15:52:01 -0700 | [diff] [blame] | 936 | } |
| 937 | |
| 938 | /** |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 939 | * netlbl_conn_setattr - Label a connected socket using the correct protocol |
| 940 | * @sk: the socket to label |
| 941 | * @addr: the destination address |
| 942 | * @secattr: the security attributes |
| 943 | * |
| 944 | * Description: |
| 945 | * Attach the correct label to the given connected socket using the security |
| 946 | * attributes specified in @secattr. The caller is responsible for ensuring |
| 947 | * that @sk is locked. Returns zero on success, negative values on failure. |
| 948 | * |
| 949 | */ |
| 950 | int netlbl_conn_setattr(struct sock *sk, |
| 951 | struct sockaddr *addr, |
| 952 | const struct netlbl_lsm_secattr *secattr) |
| 953 | { |
| 954 | int ret_val; |
| 955 | struct sockaddr_in *addr4; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 956 | struct netlbl_dommap_def *entry; |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 957 | |
| 958 | rcu_read_lock(); |
| 959 | switch (addr->sa_family) { |
| 960 | case AF_INET: |
| 961 | addr4 = (struct sockaddr_in *)addr; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 962 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
| 963 | addr4->sin_addr.s_addr); |
| 964 | if (entry == NULL) { |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 965 | ret_val = -ENOENT; |
| 966 | goto conn_setattr_return; |
| 967 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 968 | switch (entry->type) { |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 969 | case NETLBL_NLTYPE_CIPSOV4: |
| 970 | ret_val = cipso_v4_sock_setattr(sk, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 971 | entry->cipso, secattr); |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 972 | break; |
| 973 | case NETLBL_NLTYPE_UNLABELED: |
| 974 | /* just delete the protocols we support for right now |
| 975 | * but we could remove other protocols if needed */ |
| 976 | cipso_v4_sock_delattr(sk); |
| 977 | ret_val = 0; |
| 978 | break; |
| 979 | default: |
| 980 | ret_val = -ENOENT; |
| 981 | } |
| 982 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 983 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 984 | case AF_INET6: |
| 985 | /* since we don't support any IPv6 labeling protocols right |
| 986 | * now we can optimize everything away until we do */ |
| 987 | ret_val = 0; |
| 988 | break; |
| 989 | #endif /* IPv6 */ |
| 990 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 991 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | 014ab19 | 2008-10-10 10:16:33 -0400 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | conn_setattr_return: |
| 995 | rcu_read_unlock(); |
| 996 | return ret_val; |
| 997 | } |
| 998 | |
| 999 | /** |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1000 | * netlbl_req_setattr - Label a request socket using the correct protocol |
| 1001 | * @req: the request socket to label |
| 1002 | * @secattr: the security attributes |
| 1003 | * |
| 1004 | * Description: |
| 1005 | * Attach the correct label to the given socket using the security attributes |
| 1006 | * specified in @secattr. Returns zero on success, negative values on failure. |
| 1007 | * |
| 1008 | */ |
| 1009 | int netlbl_req_setattr(struct request_sock *req, |
| 1010 | const struct netlbl_lsm_secattr *secattr) |
| 1011 | { |
| 1012 | int ret_val; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1013 | struct netlbl_dommap_def *entry; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1014 | |
| 1015 | rcu_read_lock(); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1016 | switch (req->rsk_ops->family) { |
| 1017 | case AF_INET: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1018 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 1019 | inet_rsk(req)->ir_rmt_addr); |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1020 | if (entry == NULL) { |
| 1021 | ret_val = -ENOENT; |
| 1022 | goto req_setattr_return; |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1023 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1024 | switch (entry->type) { |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1025 | case NETLBL_NLTYPE_CIPSOV4: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1026 | ret_val = cipso_v4_req_setattr(req, |
| 1027 | entry->cipso, secattr); |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1028 | break; |
| 1029 | case NETLBL_NLTYPE_UNLABELED: |
| 1030 | /* just delete the protocols we support for right now |
| 1031 | * but we could remove other protocols if needed */ |
| 1032 | cipso_v4_req_delattr(req); |
| 1033 | ret_val = 0; |
| 1034 | break; |
| 1035 | default: |
| 1036 | ret_val = -ENOENT; |
| 1037 | } |
| 1038 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1039 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1040 | case AF_INET6: |
| 1041 | /* since we don't support any IPv6 labeling protocols right |
| 1042 | * now we can optimize everything away until we do */ |
| 1043 | ret_val = 0; |
| 1044 | break; |
| 1045 | #endif /* IPv6 */ |
| 1046 | default: |
| 1047 | ret_val = -EPROTONOSUPPORT; |
| 1048 | } |
| 1049 | |
| 1050 | req_setattr_return: |
| 1051 | rcu_read_unlock(); |
| 1052 | return ret_val; |
| 1053 | } |
| 1054 | |
| 1055 | /** |
Paul Moore | 07feee8 | 2009-03-27 17:10:54 -0400 | [diff] [blame] | 1056 | * netlbl_req_delattr - Delete all the NetLabel labels on a socket |
| 1057 | * @req: the socket |
| 1058 | * |
| 1059 | * Description: |
| 1060 | * Remove all the NetLabel labeling from @req. |
| 1061 | * |
| 1062 | */ |
| 1063 | void netlbl_req_delattr(struct request_sock *req) |
| 1064 | { |
Paul Moore | 0e0e367 | 2016-06-06 15:17:20 -0400 | [diff] [blame] | 1065 | switch (req->rsk_ops->family) { |
| 1066 | case AF_INET: |
| 1067 | cipso_v4_req_delattr(req); |
| 1068 | break; |
| 1069 | } |
Paul Moore | 07feee8 | 2009-03-27 17:10:54 -0400 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | /** |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1073 | * netlbl_skbuff_setattr - Label a packet using the correct protocol |
| 1074 | * @skb: the packet |
| 1075 | * @family: protocol family |
| 1076 | * @secattr: the security attributes |
| 1077 | * |
| 1078 | * Description: |
| 1079 | * Attach the correct label to the given packet using the security attributes |
| 1080 | * specified in @secattr. Returns zero on success, negative values on failure. |
| 1081 | * |
| 1082 | */ |
| 1083 | int netlbl_skbuff_setattr(struct sk_buff *skb, |
| 1084 | u16 family, |
| 1085 | const struct netlbl_lsm_secattr *secattr) |
| 1086 | { |
| 1087 | int ret_val; |
| 1088 | struct iphdr *hdr4; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1089 | struct netlbl_dommap_def *entry; |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1090 | |
| 1091 | rcu_read_lock(); |
| 1092 | switch (family) { |
| 1093 | case AF_INET: |
| 1094 | hdr4 = ip_hdr(skb); |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1095 | entry = netlbl_domhsh_getentry_af4(secattr->domain,hdr4->daddr); |
| 1096 | if (entry == NULL) { |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1097 | ret_val = -ENOENT; |
| 1098 | goto skbuff_setattr_return; |
| 1099 | } |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1100 | switch (entry->type) { |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1101 | case NETLBL_NLTYPE_CIPSOV4: |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 1102 | ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso, |
| 1103 | secattr); |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1104 | break; |
| 1105 | case NETLBL_NLTYPE_UNLABELED: |
| 1106 | /* just delete the protocols we support for right now |
| 1107 | * but we could remove other protocols if needed */ |
| 1108 | ret_val = cipso_v4_skbuff_delattr(skb); |
| 1109 | break; |
| 1110 | default: |
| 1111 | ret_val = -ENOENT; |
| 1112 | } |
| 1113 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1114 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1115 | case AF_INET6: |
| 1116 | /* since we don't support any IPv6 labeling protocols right |
| 1117 | * now we can optimize everything away until we do */ |
| 1118 | ret_val = 0; |
| 1119 | break; |
| 1120 | #endif /* IPv6 */ |
| 1121 | default: |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1122 | ret_val = -EPROTONOSUPPORT; |
Paul Moore | 948bf85 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | skbuff_setattr_return: |
| 1126 | rcu_read_unlock(); |
| 1127 | return ret_val; |
| 1128 | } |
| 1129 | |
| 1130 | /** |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1131 | * netlbl_skbuff_getattr - Determine the security attributes of a packet |
| 1132 | * @skb: the packet |
Paul Moore | 75e2291 | 2008-01-29 08:38:04 -0500 | [diff] [blame] | 1133 | * @family: protocol family |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1134 | * @secattr: the security attributes |
| 1135 | * |
| 1136 | * Description: |
| 1137 | * Examines the given packet to see if a recognized form of packet labeling |
| 1138 | * is present, if so it parses the packet label and returns the security |
| 1139 | * attributes in @secattr. Returns zero on success, negative values on |
| 1140 | * failure. |
| 1141 | * |
| 1142 | */ |
| 1143 | int netlbl_skbuff_getattr(const struct sk_buff *skb, |
Paul Moore | 75e2291 | 2008-01-29 08:38:04 -0500 | [diff] [blame] | 1144 | u16 family, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1145 | struct netlbl_lsm_secattr *secattr) |
| 1146 | { |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1147 | unsigned char *ptr; |
| 1148 | |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1149 | switch (family) { |
| 1150 | case AF_INET: |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1151 | ptr = cipso_v4_optptr(skb); |
| 1152 | if (ptr && cipso_v4_getattr(ptr, secattr) == 0) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1153 | return 0; |
| 1154 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1155 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 389fb800 | 2009-03-27 17:10:34 -0400 | [diff] [blame] | 1156 | case AF_INET6: |
| 1157 | break; |
| 1158 | #endif /* IPv6 */ |
| 1159 | } |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1160 | |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 1161 | return netlbl_unlabel_getattr(skb, family, secattr); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | /** |
| 1165 | * netlbl_skbuff_err - Handle a LSM error on a sk_buff |
| 1166 | * @skb: the packet |
| 1167 | * @error: the error code |
Paul Moore | dfaebe9 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 1168 | * @gateway: true if host is acting as a gateway, false otherwise |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1169 | * |
| 1170 | * Description: |
| 1171 | * Deal with a LSM problem when handling the packet in @skb, typically this is |
| 1172 | * a permission denied problem (-EACCES). The correct action is determined |
| 1173 | * according to the packet's labeling protocol. |
| 1174 | * |
| 1175 | */ |
Paul Moore | dfaebe9 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 1176 | void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1177 | { |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1178 | if (cipso_v4_optptr(skb)) |
Paul Moore | dfaebe9 | 2008-10-10 10:16:31 -0400 | [diff] [blame] | 1179 | cipso_v4_error(skb, error, gateway); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1180 | } |
| 1181 | |
| 1182 | /** |
| 1183 | * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches |
| 1184 | * |
| 1185 | * Description: |
| 1186 | * For all of the NetLabel protocols that support some form of label mapping |
| 1187 | * cache, invalidate the cache. Returns zero on success, negative values on |
| 1188 | * error. |
| 1189 | * |
| 1190 | */ |
| 1191 | void netlbl_cache_invalidate(void) |
| 1192 | { |
| 1193 | cipso_v4_cache_invalidate(); |
| 1194 | } |
| 1195 | |
| 1196 | /** |
| 1197 | * netlbl_cache_add - Add an entry to a NetLabel protocol cache |
| 1198 | * @skb: the packet |
| 1199 | * @secattr: the packet's security attributes |
| 1200 | * |
| 1201 | * Description: |
| 1202 | * Add the LSM security attributes for the given packet to the underlying |
| 1203 | * NetLabel protocol's label mapping cache. Returns zero on success, negative |
| 1204 | * values on error. |
| 1205 | * |
| 1206 | */ |
| 1207 | int netlbl_cache_add(const struct sk_buff *skb, |
| 1208 | const struct netlbl_lsm_secattr *secattr) |
| 1209 | { |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1210 | unsigned char *ptr; |
| 1211 | |
Paul Moore | 701a90b | 2006-11-17 17:38:46 -0500 | [diff] [blame] | 1212 | if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1213 | return -ENOMSG; |
| 1214 | |
Paul Moore | 04f81f0 | 2015-02-11 14:46:37 -0500 | [diff] [blame] | 1215 | ptr = cipso_v4_optptr(skb); |
| 1216 | if (ptr) |
| 1217 | return cipso_v4_cache_add(ptr, secattr); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1218 | |
| 1219 | return -ENOMSG; |
| 1220 | } |
| 1221 | |
| 1222 | /* |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 1223 | * Protocol Engine Functions |
| 1224 | */ |
| 1225 | |
| 1226 | /** |
| 1227 | * netlbl_audit_start - Start an audit message |
| 1228 | * @type: audit message type |
| 1229 | * @audit_info: NetLabel audit information |
| 1230 | * |
| 1231 | * Description: |
| 1232 | * Start an audit message using the type specified in @type and fill the audit |
| 1233 | * message with some fields common to all NetLabel audit messages. This |
| 1234 | * function should only be used by protocol engines, not LSMs. Returns a |
| 1235 | * pointer to the audit buffer on success, NULL on failure. |
| 1236 | * |
| 1237 | */ |
| 1238 | struct audit_buffer *netlbl_audit_start(int type, |
| 1239 | struct netlbl_audit *audit_info) |
| 1240 | { |
| 1241 | return netlbl_audit_start_common(type, audit_info); |
| 1242 | } |
Huw Davies | cb72d38 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 1243 | EXPORT_SYMBOL(netlbl_audit_start); |
Paul Moore | 6c2e8ac | 2008-12-31 12:54:11 -0500 | [diff] [blame] | 1244 | |
| 1245 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1246 | * Setup Functions |
| 1247 | */ |
| 1248 | |
| 1249 | /** |
| 1250 | * netlbl_init - Initialize NetLabel |
| 1251 | * |
| 1252 | * Description: |
| 1253 | * Perform the required NetLabel initialization before first use. |
| 1254 | * |
| 1255 | */ |
| 1256 | static int __init netlbl_init(void) |
| 1257 | { |
| 1258 | int ret_val; |
| 1259 | |
| 1260 | printk(KERN_INFO "NetLabel: Initializing\n"); |
| 1261 | printk(KERN_INFO "NetLabel: domain hash size = %u\n", |
| 1262 | (1 << NETLBL_DOMHSH_BITSIZE)); |
| 1263 | printk(KERN_INFO "NetLabel: protocols =" |
| 1264 | " UNLABELED" |
| 1265 | " CIPSOv4" |
| 1266 | "\n"); |
| 1267 | |
| 1268 | ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE); |
| 1269 | if (ret_val != 0) |
| 1270 | goto init_failure; |
| 1271 | |
Paul Moore | 8cc4457 | 2008-01-29 08:44:21 -0500 | [diff] [blame] | 1272 | ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE); |
| 1273 | if (ret_val != 0) |
| 1274 | goto init_failure; |
| 1275 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1276 | ret_val = netlbl_netlink_init(); |
| 1277 | if (ret_val != 0) |
| 1278 | goto init_failure; |
| 1279 | |
| 1280 | ret_val = netlbl_unlabel_defconf(); |
| 1281 | if (ret_val != 0) |
| 1282 | goto init_failure; |
| 1283 | printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n"); |
| 1284 | |
| 1285 | return 0; |
| 1286 | |
| 1287 | init_failure: |
| 1288 | panic("NetLabel: failed to initialize properly (%d)\n", ret_val); |
| 1289 | } |
| 1290 | |
| 1291 | subsys_initcall(netlbl_init); |