Thomas Gleixner | 1ccea77 | 2019-05-19 15:51:43 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 2 | /* |
| 3 | * NetLabel Management Support |
| 4 | * |
| 5 | * This file defines the management functions for the NetLabel system. The |
| 6 | * NetLabel system manages static and dynamic label mappings for network |
| 7 | * protocols such as CIPSO and RIPSO. |
| 8 | * |
Paul Moore | 82c21bf | 2011-08-01 11:10:33 +0000 | [diff] [blame] | 9 | * Author: Paul Moore <paul@paul-moore.com> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | /* |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -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 | |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/socket.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/skbuff.h> |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 20 | #include <linux/in.h> |
| 21 | #include <linux/in6.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 23 | #include <net/sock.h> |
| 24 | #include <net/netlink.h> |
| 25 | #include <net/genetlink.h> |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 26 | #include <net/ip.h> |
| 27 | #include <net/ipv6.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 28 | #include <net/netlabel.h> |
| 29 | #include <net/cipso_ipv4.h> |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 30 | #include <net/calipso.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 31 | #include <linux/atomic.h> |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 32 | |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 33 | #include "netlabel_calipso.h" |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 34 | #include "netlabel_domainhash.h" |
| 35 | #include "netlabel_user.h" |
| 36 | #include "netlabel_mgmt.h" |
| 37 | |
Paul Moore | c783f1c | 2008-01-29 08:37:52 -0500 | [diff] [blame] | 38 | /* NetLabel configured protocol counter */ |
| 39 | atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0); |
Paul Moore | 23bcdc1 | 2007-07-18 12:28:45 -0400 | [diff] [blame] | 40 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 41 | /* Argument struct for netlbl_domhsh_walk() */ |
| 42 | struct netlbl_domhsh_walk_arg { |
| 43 | struct netlink_callback *nl_cb; |
| 44 | struct sk_buff *skb; |
| 45 | u32 seq; |
| 46 | }; |
| 47 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 48 | /* NetLabel Generic NETLINK CIPSOv4 family */ |
Johannes Berg | 489111e | 2016-10-24 14:40:03 +0200 | [diff] [blame] | 49 | static struct genl_family netlbl_mgmt_gnl_family; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 50 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 51 | /* NetLabel Netlink attribute policy */ |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 52 | static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 53 | [NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING }, |
| 54 | [NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 }, |
| 55 | [NLBL_MGMT_A_VERSION] = { .type = NLA_U32 }, |
| 56 | [NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 }, |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 57 | [NLBL_MGMT_A_FAMILY] = { .type = NLA_U16 }, |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 58 | [NLBL_MGMT_A_CLPDOI] = { .type = NLA_U32 }, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 59 | }; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 60 | |
| 61 | /* |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 62 | * Helper Functions |
| 63 | */ |
| 64 | |
| 65 | /** |
| 66 | * netlbl_mgmt_add - Handle an ADD message |
| 67 | * @info: the Generic NETLINK info block |
| 68 | * @audit_info: NetLabel audit information |
| 69 | * |
| 70 | * Description: |
| 71 | * Helper function for the ADD and ADDDEF messages to add the domain mappings |
| 72 | * from the message to the hash table. See netlabel.h for a description of the |
| 73 | * message format. Returns zero on success, negative values on failure. |
| 74 | * |
| 75 | */ |
| 76 | static int netlbl_mgmt_add_common(struct genl_info *info, |
| 77 | struct netlbl_audit *audit_info) |
| 78 | { |
| 79 | int ret_val = -EINVAL; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 80 | struct netlbl_domaddr_map *addrmap = NULL; |
| 81 | struct cipso_v4_doi *cipsov4 = NULL; |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 82 | #if IS_ENABLED(CONFIG_IPV6) |
| 83 | struct calipso_doi *calipso = NULL; |
| 84 | #endif |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 85 | u32 tmp_val; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 86 | struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 87 | |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 88 | if (!entry) |
| 89 | return -ENOMEM; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 90 | entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 91 | if (info->attrs[NLBL_MGMT_A_DOMAIN]) { |
| 92 | size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]); |
| 93 | entry->domain = kmalloc(tmp_size, GFP_KERNEL); |
| 94 | if (entry->domain == NULL) { |
| 95 | ret_val = -ENOMEM; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 96 | goto add_free_entry; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 97 | } |
| 98 | nla_strlcpy(entry->domain, |
| 99 | info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size); |
| 100 | } |
| 101 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 102 | /* NOTE: internally we allow/use a entry->def.type value of |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 103 | * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users |
| 104 | * to pass that as a protocol value because we need to know the |
| 105 | * "real" protocol */ |
| 106 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 107 | switch (entry->def.type) { |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 108 | case NETLBL_NLTYPE_UNLABELED: |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 109 | if (info->attrs[NLBL_MGMT_A_FAMILY]) |
| 110 | entry->family = |
| 111 | nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); |
| 112 | else |
| 113 | entry->family = AF_UNSPEC; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 114 | break; |
| 115 | case NETLBL_NLTYPE_CIPSOV4: |
| 116 | if (!info->attrs[NLBL_MGMT_A_CV4DOI]) |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 117 | goto add_free_domain; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 118 | |
| 119 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]); |
| 120 | cipsov4 = cipso_v4_doi_getdef(tmp_val); |
| 121 | if (cipsov4 == NULL) |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 122 | goto add_free_domain; |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 123 | entry->family = AF_INET; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 124 | entry->def.cipso = cipsov4; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 125 | break; |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 126 | #if IS_ENABLED(CONFIG_IPV6) |
| 127 | case NETLBL_NLTYPE_CALIPSO: |
| 128 | if (!info->attrs[NLBL_MGMT_A_CLPDOI]) |
| 129 | goto add_free_domain; |
| 130 | |
| 131 | tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CLPDOI]); |
| 132 | calipso = calipso_doi_getdef(tmp_val); |
| 133 | if (calipso == NULL) |
| 134 | goto add_free_domain; |
| 135 | entry->family = AF_INET6; |
| 136 | entry->def.calipso = calipso; |
| 137 | break; |
| 138 | #endif /* IPv6 */ |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 139 | default: |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 140 | goto add_free_domain; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 141 | } |
| 142 | |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 143 | if ((entry->family == AF_INET && info->attrs[NLBL_MGMT_A_IPV6ADDR]) || |
| 144 | (entry->family == AF_INET6 && info->attrs[NLBL_MGMT_A_IPV4ADDR])) |
| 145 | goto add_doi_put_def; |
| 146 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 147 | if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) { |
| 148 | struct in_addr *addr; |
| 149 | struct in_addr *mask; |
| 150 | struct netlbl_domaddr4_map *map; |
| 151 | |
| 152 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); |
| 153 | if (addrmap == NULL) { |
| 154 | ret_val = -ENOMEM; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 155 | goto add_doi_put_def; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 156 | } |
| 157 | INIT_LIST_HEAD(&addrmap->list4); |
| 158 | INIT_LIST_HEAD(&addrmap->list6); |
| 159 | |
| 160 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) != |
| 161 | sizeof(struct in_addr)) { |
| 162 | ret_val = -EINVAL; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 163 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 164 | } |
| 165 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) != |
| 166 | sizeof(struct in_addr)) { |
| 167 | ret_val = -EINVAL; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 168 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 169 | } |
| 170 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]); |
| 171 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]); |
| 172 | |
| 173 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 174 | if (map == NULL) { |
| 175 | ret_val = -ENOMEM; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 176 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 177 | } |
| 178 | map->list.addr = addr->s_addr & mask->s_addr; |
| 179 | map->list.mask = mask->s_addr; |
| 180 | map->list.valid = 1; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 181 | map->def.type = entry->def.type; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 182 | if (cipsov4) |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 183 | map->def.cipso = cipsov4; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 184 | |
| 185 | ret_val = netlbl_af4list_add(&map->list, &addrmap->list4); |
| 186 | if (ret_val != 0) { |
| 187 | kfree(map); |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 188 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 189 | } |
| 190 | |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 191 | entry->family = AF_INET; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 192 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
| 193 | entry->def.addrsel = addrmap; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 194 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 195 | } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) { |
| 196 | struct in6_addr *addr; |
| 197 | struct in6_addr *mask; |
| 198 | struct netlbl_domaddr6_map *map; |
| 199 | |
| 200 | addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL); |
| 201 | if (addrmap == NULL) { |
| 202 | ret_val = -ENOMEM; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 203 | goto add_doi_put_def; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 204 | } |
| 205 | INIT_LIST_HEAD(&addrmap->list4); |
| 206 | INIT_LIST_HEAD(&addrmap->list6); |
| 207 | |
| 208 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) != |
| 209 | sizeof(struct in6_addr)) { |
| 210 | ret_val = -EINVAL; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 211 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 212 | } |
| 213 | if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) != |
| 214 | sizeof(struct in6_addr)) { |
| 215 | ret_val = -EINVAL; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 216 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 217 | } |
| 218 | addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]); |
| 219 | mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]); |
| 220 | |
| 221 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 222 | if (map == NULL) { |
| 223 | ret_val = -ENOMEM; |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 224 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 225 | } |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 226 | map->list.addr = *addr; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 227 | map->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; |
| 228 | map->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; |
| 229 | map->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; |
| 230 | map->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 231 | map->list.mask = *mask; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 232 | map->list.valid = 1; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 233 | map->def.type = entry->def.type; |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 234 | if (calipso) |
| 235 | map->def.calipso = calipso; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 236 | |
| 237 | ret_val = netlbl_af6list_add(&map->list, &addrmap->list6); |
| 238 | if (ret_val != 0) { |
| 239 | kfree(map); |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 240 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 241 | } |
| 242 | |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 243 | entry->family = AF_INET6; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 244 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; |
| 245 | entry->def.addrsel = addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 246 | #endif /* IPv6 */ |
| 247 | } |
| 248 | |
| 249 | ret_val = netlbl_domhsh_add(entry, audit_info); |
| 250 | if (ret_val != 0) |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 251 | goto add_free_addrmap; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 252 | |
| 253 | return 0; |
| 254 | |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 255 | add_free_addrmap: |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 256 | kfree(addrmap); |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 257 | add_doi_put_def: |
| 258 | cipso_v4_doi_putdef(cipsov4); |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 259 | #if IS_ENABLED(CONFIG_IPV6) |
| 260 | calipso_doi_putdef(calipso); |
| 261 | #endif |
Markus Elfring | 4de46d5 | 2015-02-02 11:00:24 +0100 | [diff] [blame] | 262 | add_free_domain: |
| 263 | kfree(entry->domain); |
| 264 | add_free_entry: |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 265 | kfree(entry); |
| 266 | return ret_val; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry |
| 271 | * @skb: the NETLINK buffer |
| 272 | * @entry: the map entry |
| 273 | * |
| 274 | * Description: |
| 275 | * This function is a helper function used by the LISTALL and LISTDEF command |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 276 | * handlers. The caller is responsible for ensuring that the RCU read lock |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 277 | * is held. Returns zero on success, negative values on failure. |
| 278 | * |
| 279 | */ |
| 280 | static int netlbl_mgmt_listentry(struct sk_buff *skb, |
| 281 | struct netlbl_dom_map *entry) |
| 282 | { |
Paul Moore | f8a0247 | 2008-10-29 16:09:12 -0400 | [diff] [blame] | 283 | int ret_val = 0; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 284 | struct nlattr *nla_a; |
| 285 | struct nlattr *nla_b; |
| 286 | struct netlbl_af4list *iter4; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 287 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 288 | struct netlbl_af6list *iter6; |
| 289 | #endif |
| 290 | |
| 291 | if (entry->domain != NULL) { |
| 292 | ret_val = nla_put_string(skb, |
| 293 | NLBL_MGMT_A_DOMAIN, entry->domain); |
| 294 | if (ret_val != 0) |
| 295 | return ret_val; |
| 296 | } |
| 297 | |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 298 | ret_val = nla_put_u16(skb, NLBL_MGMT_A_FAMILY, entry->family); |
| 299 | if (ret_val != 0) |
| 300 | return ret_val; |
| 301 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 302 | switch (entry->def.type) { |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 303 | case NETLBL_NLTYPE_ADDRSELECT: |
Michal Kubecek | ae0be8d | 2019-04-26 11:13:06 +0200 | [diff] [blame] | 304 | nla_a = nla_nest_start_noflag(skb, NLBL_MGMT_A_SELECTORLIST); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 305 | if (nla_a == NULL) |
| 306 | return -ENOMEM; |
| 307 | |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 308 | netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) { |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 309 | struct netlbl_domaddr4_map *map4; |
| 310 | struct in_addr addr_struct; |
| 311 | |
Michal Kubecek | ae0be8d | 2019-04-26 11:13:06 +0200 | [diff] [blame] | 312 | nla_b = nla_nest_start_noflag(skb, |
| 313 | NLBL_MGMT_A_ADDRSELECTOR); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 314 | if (nla_b == NULL) |
| 315 | return -ENOMEM; |
| 316 | |
| 317 | addr_struct.s_addr = iter4->addr; |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 318 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4ADDR, |
| 319 | addr_struct.s_addr); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 320 | if (ret_val != 0) |
| 321 | return ret_val; |
| 322 | addr_struct.s_addr = iter4->mask; |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 323 | ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4MASK, |
| 324 | addr_struct.s_addr); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 325 | if (ret_val != 0) |
| 326 | return ret_val; |
| 327 | map4 = netlbl_domhsh_addr4_entry(iter4); |
| 328 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 329 | map4->def.type); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 330 | if (ret_val != 0) |
| 331 | return ret_val; |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 332 | switch (map4->def.type) { |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 333 | case NETLBL_NLTYPE_CIPSOV4: |
| 334 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 335 | map4->def.cipso->doi); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 336 | if (ret_val != 0) |
| 337 | return ret_val; |
| 338 | break; |
| 339 | } |
| 340 | |
| 341 | nla_nest_end(skb, nla_b); |
| 342 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 343 | #if IS_ENABLED(CONFIG_IPV6) |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 344 | netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) { |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 345 | struct netlbl_domaddr6_map *map6; |
| 346 | |
Michal Kubecek | ae0be8d | 2019-04-26 11:13:06 +0200 | [diff] [blame] | 347 | nla_b = nla_nest_start_noflag(skb, |
| 348 | NLBL_MGMT_A_ADDRSELECTOR); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 349 | if (nla_b == NULL) |
| 350 | return -ENOMEM; |
| 351 | |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 352 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6ADDR, |
| 353 | &iter6->addr); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 354 | if (ret_val != 0) |
| 355 | return ret_val; |
Jiri Benc | 930345e | 2015-03-29 16:59:25 +0200 | [diff] [blame] | 356 | ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6MASK, |
| 357 | &iter6->mask); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 358 | if (ret_val != 0) |
| 359 | return ret_val; |
| 360 | map6 = netlbl_domhsh_addr6_entry(iter6); |
| 361 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 362 | map6->def.type); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 363 | if (ret_val != 0) |
| 364 | return ret_val; |
| 365 | |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 366 | switch (map6->def.type) { |
| 367 | case NETLBL_NLTYPE_CALIPSO: |
| 368 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, |
| 369 | map6->def.calipso->doi); |
| 370 | if (ret_val != 0) |
| 371 | return ret_val; |
| 372 | break; |
| 373 | } |
| 374 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 375 | nla_nest_end(skb, nla_b); |
| 376 | } |
| 377 | #endif /* IPv6 */ |
| 378 | |
| 379 | nla_nest_end(skb, nla_a); |
| 380 | break; |
| 381 | case NETLBL_NLTYPE_UNLABELED: |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 382 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
| 383 | entry->def.type); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 384 | break; |
| 385 | case NETLBL_NLTYPE_CIPSOV4: |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 386 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
| 387 | entry->def.type); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 388 | if (ret_val != 0) |
| 389 | return ret_val; |
| 390 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI, |
Paul Moore | 6a8b7f0 | 2013-08-02 14:45:08 -0400 | [diff] [blame] | 391 | entry->def.cipso->doi); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 392 | break; |
Huw Davies | dc7de73 | 2016-06-27 15:02:49 -0400 | [diff] [blame] | 393 | case NETLBL_NLTYPE_CALIPSO: |
| 394 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, |
| 395 | entry->def.type); |
| 396 | if (ret_val != 0) |
| 397 | return ret_val; |
| 398 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_CLPDOI, |
| 399 | entry->def.calipso->doi); |
| 400 | break; |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | return ret_val; |
| 404 | } |
| 405 | |
| 406 | /* |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 407 | * NetLabel Command Handlers |
| 408 | */ |
| 409 | |
| 410 | /** |
| 411 | * netlbl_mgmt_add - Handle an ADD message |
| 412 | * @skb: the NETLINK buffer |
| 413 | * @info: the Generic NETLINK info block |
| 414 | * |
| 415 | * Description: |
| 416 | * Process a user generated ADD message and add the domains from the message |
| 417 | * to the hash table. See netlabel.h for a description of the message format. |
| 418 | * Returns zero on success, negative values on failure. |
| 419 | * |
| 420 | */ |
| 421 | static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info) |
| 422 | { |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 423 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 424 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 425 | if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) || |
| 426 | (!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
| 427 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && |
| 428 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || |
| 429 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && |
| 430 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || |
| 431 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ |
| 432 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || |
| 433 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ |
| 434 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) |
| 435 | return -EINVAL; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 436 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 437 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 438 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 439 | return netlbl_mgmt_add_common(info, &audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | /** |
| 443 | * netlbl_mgmt_remove - Handle a REMOVE message |
| 444 | * @skb: the NETLINK buffer |
| 445 | * @info: the Generic NETLINK info block |
| 446 | * |
| 447 | * Description: |
| 448 | * Process a user generated REMOVE message and remove the specified domain |
| 449 | * mappings. Returns zero on success, negative values on failure. |
| 450 | * |
| 451 | */ |
| 452 | static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info) |
| 453 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 454 | char *domain; |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 455 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 456 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 457 | if (!info->attrs[NLBL_MGMT_A_DOMAIN]) |
| 458 | return -EINVAL; |
| 459 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 460 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 461 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 462 | domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]); |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 463 | return netlbl_domhsh_remove(domain, AF_UNSPEC, &audit_info); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /** |
| 467 | * netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL |
| 468 | * @entry: the domain mapping hash table entry |
| 469 | * @arg: the netlbl_domhsh_walk_arg structure |
| 470 | * |
| 471 | * Description: |
| 472 | * This function is designed to be used as a callback to the |
| 473 | * netlbl_domhsh_walk() function for use in generating a response for a LISTALL |
| 474 | * message. Returns the size of the message on success, negative values on |
| 475 | * failure. |
| 476 | * |
| 477 | */ |
| 478 | static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg) |
| 479 | { |
| 480 | int ret_val = -ENOMEM; |
| 481 | struct netlbl_domhsh_walk_arg *cb_arg = arg; |
| 482 | void *data; |
| 483 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 484 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 485 | cb_arg->seq, &netlbl_mgmt_gnl_family, |
| 486 | NLM_F_MULTI, NLBL_MGMT_C_LISTALL); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 487 | if (data == NULL) |
| 488 | goto listall_cb_failure; |
| 489 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 490 | ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 491 | if (ret_val != 0) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 492 | goto listall_cb_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 493 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 494 | cb_arg->seq++; |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 495 | genlmsg_end(cb_arg->skb, data); |
| 496 | return 0; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 497 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 498 | listall_cb_failure: |
| 499 | genlmsg_cancel(cb_arg->skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 500 | return ret_val; |
| 501 | } |
| 502 | |
| 503 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 504 | * netlbl_mgmt_listall - Handle a LISTALL message |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 505 | * @skb: the NETLINK buffer |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 506 | * @cb: the NETLINK callback |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 507 | * |
| 508 | * Description: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 509 | * Process a user generated LISTALL message and dumps the domain hash table in |
| 510 | * a form suitable for use in a kernel generated LISTALL message. Returns zero |
| 511 | * on success, negative values on failure. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 512 | * |
| 513 | */ |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 514 | static int netlbl_mgmt_listall(struct sk_buff *skb, |
| 515 | struct netlink_callback *cb) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 516 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 517 | struct netlbl_domhsh_walk_arg cb_arg; |
| 518 | u32 skip_bkt = cb->args[0]; |
| 519 | u32 skip_chain = cb->args[1]; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 520 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 521 | cb_arg.nl_cb = cb; |
| 522 | cb_arg.skb = skb; |
| 523 | cb_arg.seq = cb->nlh->nlmsg_seq; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 524 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 525 | netlbl_domhsh_walk(&skip_bkt, |
| 526 | &skip_chain, |
| 527 | netlbl_mgmt_listall_cb, |
| 528 | &cb_arg); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 529 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 530 | cb->args[0] = skip_bkt; |
| 531 | cb->args[1] = skip_chain; |
| 532 | return skb->len; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | /** |
| 536 | * netlbl_mgmt_adddef - Handle an ADDDEF message |
| 537 | * @skb: the NETLINK buffer |
| 538 | * @info: the Generic NETLINK info block |
| 539 | * |
| 540 | * Description: |
| 541 | * Process a user generated ADDDEF message and respond accordingly. Returns |
| 542 | * zero on success, negative values on failure. |
| 543 | * |
| 544 | */ |
| 545 | static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info) |
| 546 | { |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 547 | struct netlbl_audit audit_info; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 548 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 549 | if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) || |
| 550 | (info->attrs[NLBL_MGMT_A_IPV4ADDR] && |
| 551 | info->attrs[NLBL_MGMT_A_IPV6ADDR]) || |
| 552 | (info->attrs[NLBL_MGMT_A_IPV4MASK] && |
| 553 | info->attrs[NLBL_MGMT_A_IPV6MASK]) || |
| 554 | ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^ |
| 555 | (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) || |
| 556 | ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^ |
| 557 | (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL))) |
| 558 | return -EINVAL; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 559 | |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 560 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 561 | |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 562 | return netlbl_mgmt_add_common(info, &audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | /** |
| 566 | * netlbl_mgmt_removedef - Handle a REMOVEDEF message |
| 567 | * @skb: the NETLINK buffer |
| 568 | * @info: the Generic NETLINK info block |
| 569 | * |
| 570 | * Description: |
| 571 | * Process a user generated REMOVEDEF message and remove the default domain |
| 572 | * mapping. Returns zero on success, negative values on failure. |
| 573 | * |
| 574 | */ |
| 575 | static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info) |
| 576 | { |
Paul Moore | 95d4e6b | 2006-09-29 17:05:05 -0700 | [diff] [blame] | 577 | struct netlbl_audit audit_info; |
| 578 | |
| 579 | netlbl_netlink_auditinfo(skb, &audit_info); |
| 580 | |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 581 | return netlbl_domhsh_remove_default(AF_UNSPEC, &audit_info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /** |
| 585 | * netlbl_mgmt_listdef - Handle a LISTDEF message |
| 586 | * @skb: the NETLINK buffer |
| 587 | * @info: the Generic NETLINK info block |
| 588 | * |
| 589 | * Description: |
| 590 | * Process a user generated LISTDEF message and dumps the default domain |
| 591 | * mapping in a form suitable for use in a kernel generated LISTDEF message. |
| 592 | * Returns zero on success, negative values on failure. |
| 593 | * |
| 594 | */ |
| 595 | static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info) |
| 596 | { |
| 597 | int ret_val = -ENOMEM; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 598 | struct sk_buff *ans_skb = NULL; |
| 599 | void *data; |
| 600 | struct netlbl_dom_map *entry; |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 601 | u16 family; |
| 602 | |
| 603 | if (info->attrs[NLBL_MGMT_A_FAMILY]) |
| 604 | family = nla_get_u16(info->attrs[NLBL_MGMT_A_FAMILY]); |
| 605 | else |
| 606 | family = AF_INET; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 607 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 608 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 609 | if (ans_skb == NULL) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 610 | return -ENOMEM; |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 611 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
| 612 | 0, NLBL_MGMT_C_LISTDEF); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 613 | if (data == NULL) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 614 | goto listdef_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 615 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 616 | rcu_read_lock(); |
Huw Davies | 8f18e67 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 617 | entry = netlbl_domhsh_getentry(NULL, family); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 618 | if (entry == NULL) { |
| 619 | ret_val = -ENOENT; |
| 620 | goto listdef_failure_lock; |
| 621 | } |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 622 | ret_val = netlbl_mgmt_listentry(ans_skb, entry); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 623 | rcu_read_unlock(); |
Paul Moore | 63c4168 | 2008-10-10 10:16:32 -0400 | [diff] [blame] | 624 | if (ret_val != 0) |
| 625 | goto listdef_failure; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 626 | |
| 627 | genlmsg_end(ans_skb, data); |
Denis V. Lunev | fe785be | 2008-07-10 16:53:39 -0700 | [diff] [blame] | 628 | return genlmsg_reply(ans_skb, info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 629 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 630 | listdef_failure_lock: |
| 631 | rcu_read_unlock(); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 632 | listdef_failure: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 633 | kfree_skb(ans_skb); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 634 | return ret_val; |
| 635 | } |
| 636 | |
| 637 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 638 | * netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response |
| 639 | * @skb: the skb to write to |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 640 | * @cb: the NETLINK callback |
| 641 | * @protocol: the NetLabel protocol to use in the message |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 642 | * |
| 643 | * Description: |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 644 | * This function is to be used in conjunction with netlbl_mgmt_protocols() to |
| 645 | * answer a application's PROTOCOLS message. Returns the size of the message |
| 646 | * on success, negative values on failure. |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 647 | * |
| 648 | */ |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 649 | static int netlbl_mgmt_protocols_cb(struct sk_buff *skb, |
| 650 | struct netlink_callback *cb, |
| 651 | u32 protocol) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 652 | { |
| 653 | int ret_val = -ENOMEM; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 654 | void *data; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 655 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 656 | data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 657 | &netlbl_mgmt_gnl_family, NLM_F_MULTI, |
| 658 | NLBL_MGMT_C_PROTOCOLS); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 659 | if (data == NULL) |
| 660 | goto protocols_cb_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 661 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 662 | ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 663 | if (ret_val != 0) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 664 | goto protocols_cb_failure; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 665 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 666 | genlmsg_end(skb, data); |
| 667 | return 0; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 668 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 669 | protocols_cb_failure: |
| 670 | genlmsg_cancel(skb, data); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 671 | return ret_val; |
| 672 | } |
| 673 | |
| 674 | /** |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 675 | * netlbl_mgmt_protocols - Handle a PROTOCOLS message |
| 676 | * @skb: the NETLINK buffer |
| 677 | * @cb: the NETLINK callback |
| 678 | * |
| 679 | * Description: |
| 680 | * Process a user generated PROTOCOLS message and respond accordingly. |
| 681 | * |
| 682 | */ |
| 683 | static int netlbl_mgmt_protocols(struct sk_buff *skb, |
| 684 | struct netlink_callback *cb) |
| 685 | { |
| 686 | u32 protos_sent = cb->args[0]; |
| 687 | |
| 688 | if (protos_sent == 0) { |
| 689 | if (netlbl_mgmt_protocols_cb(skb, |
| 690 | cb, |
| 691 | NETLBL_NLTYPE_UNLABELED) < 0) |
| 692 | goto protocols_return; |
| 693 | protos_sent++; |
| 694 | } |
| 695 | if (protos_sent == 1) { |
| 696 | if (netlbl_mgmt_protocols_cb(skb, |
| 697 | cb, |
| 698 | NETLBL_NLTYPE_CIPSOV4) < 0) |
| 699 | goto protocols_return; |
| 700 | protos_sent++; |
| 701 | } |
Huw Davies | cb72d38 | 2016-06-27 15:02:46 -0400 | [diff] [blame] | 702 | #if IS_ENABLED(CONFIG_IPV6) |
| 703 | if (protos_sent == 2) { |
| 704 | if (netlbl_mgmt_protocols_cb(skb, |
| 705 | cb, |
| 706 | NETLBL_NLTYPE_CALIPSO) < 0) |
| 707 | goto protocols_return; |
| 708 | protos_sent++; |
| 709 | } |
| 710 | #endif |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 711 | |
| 712 | protocols_return: |
| 713 | cb->args[0] = protos_sent; |
| 714 | return skb->len; |
| 715 | } |
| 716 | |
| 717 | /** |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 718 | * netlbl_mgmt_version - Handle a VERSION message |
| 719 | * @skb: the NETLINK buffer |
| 720 | * @info: the Generic NETLINK info block |
| 721 | * |
| 722 | * Description: |
| 723 | * Process a user generated VERSION message and respond accordingly. Returns |
| 724 | * zero on success, negative values on failure. |
| 725 | * |
| 726 | */ |
| 727 | static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info) |
| 728 | { |
| 729 | int ret_val = -ENOMEM; |
| 730 | struct sk_buff *ans_skb = NULL; |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 731 | void *data; |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 732 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 733 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 734 | if (ans_skb == NULL) |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 735 | return -ENOMEM; |
Thomas Graf | 17c157c | 2006-11-14 19:46:02 -0800 | [diff] [blame] | 736 | data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family, |
| 737 | 0, NLBL_MGMT_C_VERSION); |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 738 | if (data == NULL) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 739 | goto version_failure; |
| 740 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 741 | ret_val = nla_put_u32(ans_skb, |
| 742 | NLBL_MGMT_A_VERSION, |
| 743 | NETLBL_PROTO_VERSION); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 744 | if (ret_val != 0) |
| 745 | goto version_failure; |
| 746 | |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 747 | genlmsg_end(ans_skb, data); |
Denis V. Lunev | fe785be | 2008-07-10 16:53:39 -0700 | [diff] [blame] | 748 | return genlmsg_reply(ans_skb, info); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 749 | |
| 750 | version_failure: |
| 751 | kfree_skb(ans_skb); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 752 | return ret_val; |
| 753 | } |
| 754 | |
| 755 | |
| 756 | /* |
| 757 | * NetLabel Generic NETLINK Command Definitions |
| 758 | */ |
| 759 | |
Johannes Berg | 4534de8 | 2013-11-14 17:14:46 +0100 | [diff] [blame] | 760 | static const struct genl_ops netlbl_mgmt_genl_ops[] = { |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 761 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 762 | .cmd = NLBL_MGMT_C_ADD, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 763 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 764 | .flags = GENL_ADMIN_PERM, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 765 | .doit = netlbl_mgmt_add, |
| 766 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 767 | }, |
| 768 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 769 | .cmd = NLBL_MGMT_C_REMOVE, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 770 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 771 | .flags = GENL_ADMIN_PERM, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 772 | .doit = netlbl_mgmt_remove, |
| 773 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 774 | }, |
| 775 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 776 | .cmd = NLBL_MGMT_C_LISTALL, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 777 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 778 | .flags = 0, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 779 | .doit = NULL, |
| 780 | .dumpit = netlbl_mgmt_listall, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 781 | }, |
| 782 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 783 | .cmd = NLBL_MGMT_C_ADDDEF, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 784 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 785 | .flags = GENL_ADMIN_PERM, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 786 | .doit = netlbl_mgmt_adddef, |
| 787 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 788 | }, |
| 789 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 790 | .cmd = NLBL_MGMT_C_REMOVEDEF, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 791 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 792 | .flags = GENL_ADMIN_PERM, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 793 | .doit = netlbl_mgmt_removedef, |
| 794 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 795 | }, |
| 796 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 797 | .cmd = NLBL_MGMT_C_LISTDEF, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 798 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 799 | .flags = 0, |
| 800 | .doit = netlbl_mgmt_listdef, |
| 801 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 802 | }, |
| 803 | { |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 804 | .cmd = NLBL_MGMT_C_PROTOCOLS, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 805 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 806 | .flags = 0, |
Paul Moore | fd38585 | 2006-09-25 15:56:37 -0700 | [diff] [blame] | 807 | .doit = NULL, |
| 808 | .dumpit = netlbl_mgmt_protocols, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 809 | }, |
| 810 | { |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 811 | .cmd = NLBL_MGMT_C_VERSION, |
Johannes Berg | ef6243a | 2019-04-26 14:07:31 +0200 | [diff] [blame] | 812 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 813 | .flags = 0, |
| 814 | .doit = netlbl_mgmt_version, |
| 815 | .dumpit = NULL, |
Pavel Emelyanov | 227c43c | 2008-02-17 22:33:16 -0800 | [diff] [blame] | 816 | }, |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 817 | }; |
| 818 | |
Johannes Berg | 56989f6 | 2016-10-24 14:40:05 +0200 | [diff] [blame] | 819 | static struct genl_family netlbl_mgmt_gnl_family __ro_after_init = { |
Johannes Berg | 489111e | 2016-10-24 14:40:03 +0200 | [diff] [blame] | 820 | .hdrsize = 0, |
| 821 | .name = NETLBL_NLTYPE_MGMT_NAME, |
| 822 | .version = NETLBL_PROTO_VERSION, |
| 823 | .maxattr = NLBL_MGMT_A_MAX, |
Johannes Berg | 3b0f31f | 2019-03-21 22:51:02 +0100 | [diff] [blame] | 824 | .policy = netlbl_mgmt_genl_policy, |
Johannes Berg | 489111e | 2016-10-24 14:40:03 +0200 | [diff] [blame] | 825 | .module = THIS_MODULE, |
| 826 | .ops = netlbl_mgmt_genl_ops, |
| 827 | .n_ops = ARRAY_SIZE(netlbl_mgmt_genl_ops), |
| 828 | }; |
| 829 | |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 830 | /* |
| 831 | * NetLabel Generic NETLINK Protocol Functions |
| 832 | */ |
| 833 | |
| 834 | /** |
| 835 | * netlbl_mgmt_genl_init - Register the NetLabel management component |
| 836 | * |
| 837 | * Description: |
| 838 | * Register the NetLabel management component with the Generic NETLINK |
| 839 | * mechanism. Returns zero on success, negative values on failure. |
| 840 | * |
| 841 | */ |
Pavel Emelyanov | 05705e4 | 2008-02-17 22:33:57 -0800 | [diff] [blame] | 842 | int __init netlbl_mgmt_genl_init(void) |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 843 | { |
Johannes Berg | 489111e | 2016-10-24 14:40:03 +0200 | [diff] [blame] | 844 | return genl_register_family(&netlbl_mgmt_gnl_family); |
Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 845 | } |