Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* xfrm_user.c: User interface to configure xfrm engine. |
| 2 | * |
| 3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) |
| 4 | * |
| 5 | * Changes: |
| 6 | * Mitsuru KANDA @USAGI |
| 7 | * Kazunori MIYAZAWA @USAGI |
| 8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> |
| 9 | * IPv6 support |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 12 | |
Herbert Xu | 9409f38 | 2006-08-06 19:49:12 +1000 | [diff] [blame] | 13 | #include <linux/crypto.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/socket.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/net.h> |
| 21 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/pfkeyv2.h> |
| 23 | #include <linux/ipsec.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/security.h> |
| 26 | #include <net/sock.h> |
| 27 | #include <net/xfrm.h> |
Thomas Graf | 88fc2c8 | 2005-11-10 02:25:54 +0100 | [diff] [blame] | 28 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <asm/uaccess.h> |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 30 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 31 | #include <linux/in6.h> |
| 32 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 34 | static inline int aead_len(struct xfrm_algo_aead *alg) |
| 35 | { |
| 36 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); |
| 37 | } |
| 38 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 39 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 41 | struct nlattr *rt = attrs[type]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | struct xfrm_algo *algp; |
| 43 | |
| 44 | if (!rt) |
| 45 | return 0; |
| 46 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 47 | algp = nla_data(rt); |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 48 | if (nla_len(rt) < xfrm_alg_len(algp)) |
Herbert Xu | 31c2685 | 2005-05-19 12:39:49 -0700 | [diff] [blame] | 49 | return -EINVAL; |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | switch (type) { |
| 52 | case XFRMA_ALG_AUTH: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | case XFRMA_ALG_CRYPT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | case XFRMA_ALG_COMP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | break; |
| 56 | |
| 57 | default: |
| 58 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 59 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 62 | return 0; |
| 63 | } |
| 64 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 65 | static int verify_auth_trunc(struct nlattr **attrs) |
| 66 | { |
| 67 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; |
| 68 | struct xfrm_algo_auth *algp; |
| 69 | |
| 70 | if (!rt) |
| 71 | return 0; |
| 72 | |
| 73 | algp = nla_data(rt); |
| 74 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) |
| 75 | return -EINVAL; |
| 76 | |
| 77 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 78 | return 0; |
| 79 | } |
| 80 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 81 | static int verify_aead(struct nlattr **attrs) |
| 82 | { |
| 83 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; |
| 84 | struct xfrm_algo_aead *algp; |
| 85 | |
| 86 | if (!rt) |
| 87 | return 0; |
| 88 | |
| 89 | algp = nla_data(rt); |
| 90 | if (nla_len(rt) < aead_len(algp)) |
| 91 | return -EINVAL; |
| 92 | |
| 93 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 94 | return 0; |
| 95 | } |
| 96 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 97 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 98 | xfrm_address_t **addrp) |
| 99 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 100 | struct nlattr *rt = attrs[type]; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 101 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 102 | if (rt && addrp) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 103 | *addrp = nla_data(rt); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 104 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 105 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 106 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 107 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 108 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 109 | struct xfrm_user_sec_ctx *uctx; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 110 | |
| 111 | if (!rt) |
| 112 | return 0; |
| 113 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 114 | uctx = nla_data(rt); |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 115 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 116 | return -EINVAL; |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 123 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
| 125 | int err; |
| 126 | |
| 127 | err = -EINVAL; |
| 128 | switch (p->family) { |
| 129 | case AF_INET: |
| 130 | break; |
| 131 | |
| 132 | case AF_INET6: |
| 133 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 134 | break; |
| 135 | #else |
| 136 | err = -EAFNOSUPPORT; |
| 137 | goto out; |
| 138 | #endif |
| 139 | |
| 140 | default: |
| 141 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 142 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | err = -EINVAL; |
| 145 | switch (p->id.proto) { |
| 146 | case IPPROTO_AH: |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 147 | if ((!attrs[XFRMA_ALG_AUTH] && |
| 148 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 149 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 150 | attrs[XFRMA_ALG_CRYPT] || |
| 151 | attrs[XFRMA_ALG_COMP]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | goto out; |
| 153 | break; |
| 154 | |
| 155 | case IPPROTO_ESP: |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 156 | if (attrs[XFRMA_ALG_COMP]) |
| 157 | goto out; |
| 158 | if (!attrs[XFRMA_ALG_AUTH] && |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 159 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 160 | !attrs[XFRMA_ALG_CRYPT] && |
| 161 | !attrs[XFRMA_ALG_AEAD]) |
| 162 | goto out; |
| 163 | if ((attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 164 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 165 | attrs[XFRMA_ALG_CRYPT]) && |
| 166 | attrs[XFRMA_ALG_AEAD]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | goto out; |
| 168 | break; |
| 169 | |
| 170 | case IPPROTO_COMP: |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 171 | if (!attrs[XFRMA_ALG_COMP] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 172 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 173 | attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 174 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 175 | attrs[XFRMA_ALG_CRYPT]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | goto out; |
| 177 | break; |
| 178 | |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 179 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 180 | case IPPROTO_DSTOPTS: |
| 181 | case IPPROTO_ROUTING: |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 182 | if (attrs[XFRMA_ALG_COMP] || |
| 183 | attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 184 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 185 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 186 | attrs[XFRMA_ALG_CRYPT] || |
| 187 | attrs[XFRMA_ENCAP] || |
| 188 | attrs[XFRMA_SEC_CTX] || |
| 189 | !attrs[XFRMA_COADDR]) |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 190 | goto out; |
| 191 | break; |
| 192 | #endif |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | default: |
| 195 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 196 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 198 | if ((err = verify_aead(attrs))) |
| 199 | goto out; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 200 | if ((err = verify_auth_trunc(attrs))) |
| 201 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 202 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 204 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 206 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 208 | if ((err = verify_sec_ctx_len(attrs))) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 209 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | err = -EINVAL; |
| 212 | switch (p->mode) { |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 213 | case XFRM_MODE_TRANSPORT: |
| 214 | case XFRM_MODE_TUNNEL: |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 215 | case XFRM_MODE_ROUTEOPTIMIZATION: |
Diego Beltrami | 0a69452 | 2006-10-03 23:47:05 -0700 | [diff] [blame] | 216 | case XFRM_MODE_BEET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | break; |
| 218 | |
| 219 | default: |
| 220 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 221 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | err = 0; |
| 224 | |
| 225 | out: |
| 226 | return err; |
| 227 | } |
| 228 | |
| 229 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, |
| 230 | struct xfrm_algo_desc *(*get_byname)(char *, int), |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 231 | struct nlattr *rta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | struct xfrm_algo *p, *ualg; |
| 234 | struct xfrm_algo_desc *algo; |
| 235 | |
| 236 | if (!rta) |
| 237 | return 0; |
| 238 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 239 | ualg = nla_data(rta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | algo = get_byname(ualg->alg_name, 1); |
| 242 | if (!algo) |
| 243 | return -ENOSYS; |
| 244 | *props = algo->desc.sadb_alg_id; |
| 245 | |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 246 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if (!p) |
| 248 | return -ENOMEM; |
| 249 | |
Herbert Xu | 04ff126 | 2006-08-13 08:50:00 +1000 | [diff] [blame] | 250 | strcpy(p->alg_name, algo->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | *algpp = p; |
| 252 | return 0; |
| 253 | } |
| 254 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 255 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
| 256 | struct nlattr *rta) |
| 257 | { |
| 258 | struct xfrm_algo *ualg; |
| 259 | struct xfrm_algo_auth *p; |
| 260 | struct xfrm_algo_desc *algo; |
| 261 | |
| 262 | if (!rta) |
| 263 | return 0; |
| 264 | |
| 265 | ualg = nla_data(rta); |
| 266 | |
| 267 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); |
| 268 | if (!algo) |
| 269 | return -ENOSYS; |
| 270 | *props = algo->desc.sadb_alg_id; |
| 271 | |
| 272 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); |
| 273 | if (!p) |
| 274 | return -ENOMEM; |
| 275 | |
| 276 | strcpy(p->alg_name, algo->name); |
| 277 | p->alg_key_len = ualg->alg_key_len; |
| 278 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; |
| 279 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); |
| 280 | |
| 281 | *algpp = p; |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, |
| 286 | struct nlattr *rta) |
| 287 | { |
| 288 | struct xfrm_algo_auth *p, *ualg; |
| 289 | struct xfrm_algo_desc *algo; |
| 290 | |
| 291 | if (!rta) |
| 292 | return 0; |
| 293 | |
| 294 | ualg = nla_data(rta); |
| 295 | |
| 296 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); |
| 297 | if (!algo) |
| 298 | return -ENOSYS; |
| 299 | if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) |
| 300 | return -EINVAL; |
| 301 | *props = algo->desc.sadb_alg_id; |
| 302 | |
| 303 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); |
| 304 | if (!p) |
| 305 | return -ENOMEM; |
| 306 | |
| 307 | strcpy(p->alg_name, algo->name); |
| 308 | if (!p->alg_trunc_len) |
| 309 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; |
| 310 | |
| 311 | *algpp = p; |
| 312 | return 0; |
| 313 | } |
| 314 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 315 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
| 316 | struct nlattr *rta) |
| 317 | { |
| 318 | struct xfrm_algo_aead *p, *ualg; |
| 319 | struct xfrm_algo_desc *algo; |
| 320 | |
| 321 | if (!rta) |
| 322 | return 0; |
| 323 | |
| 324 | ualg = nla_data(rta); |
| 325 | |
| 326 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); |
| 327 | if (!algo) |
| 328 | return -ENOSYS; |
| 329 | *props = algo->desc.sadb_alg_id; |
| 330 | |
| 331 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); |
| 332 | if (!p) |
| 333 | return -ENOMEM; |
| 334 | |
| 335 | strcpy(p->alg_name, algo->name); |
| 336 | *algpp = p; |
| 337 | return 0; |
| 338 | } |
| 339 | |
Joy Latten | 661697f | 2007-04-13 16:14:35 -0700 | [diff] [blame] | 340 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 341 | { |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 342 | int len = 0; |
| 343 | |
| 344 | if (xfrm_ctx) { |
| 345 | len += sizeof(struct xfrm_user_sec_ctx); |
| 346 | len += xfrm_ctx->ctx_len; |
| 347 | } |
| 348 | return len; |
| 349 | } |
| 350 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
| 352 | { |
| 353 | memcpy(&x->id, &p->id, sizeof(x->id)); |
| 354 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); |
| 355 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); |
| 356 | x->props.mode = p->mode; |
| 357 | x->props.replay_window = p->replay_window; |
| 358 | x->props.reqid = p->reqid; |
| 359 | x->props.family = p->family; |
David S. Miller | 54489c14 | 2006-10-27 15:29:47 -0700 | [diff] [blame] | 360 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | x->props.flags = p->flags; |
Herbert Xu | 196b003 | 2007-07-31 02:04:32 -0700 | [diff] [blame] | 362 | |
Steffen Klassert | ccf9b3b | 2008-07-10 16:55:37 -0700 | [diff] [blame] | 363 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
Herbert Xu | 196b003 | 2007-07-31 02:04:32 -0700 | [diff] [blame] | 364 | x->sel.family = p->family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 367 | /* |
| 368 | * someday when pfkey also has support, we could have the code |
| 369 | * somehow made shareable and move it to xfrm_state.c - JHS |
| 370 | * |
| 371 | */ |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 372 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 373 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 374 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
| 375 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
| 376 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; |
| 377 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 378 | |
| 379 | if (rp) { |
| 380 | struct xfrm_replay_state *replay; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 381 | replay = nla_data(rp); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 382 | memcpy(&x->replay, replay, sizeof(*replay)); |
| 383 | memcpy(&x->preplay, replay, sizeof(*replay)); |
| 384 | } |
| 385 | |
| 386 | if (lt) { |
| 387 | struct xfrm_lifetime_cur *ltime; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 388 | ltime = nla_data(lt); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 389 | x->curlft.bytes = ltime->bytes; |
| 390 | x->curlft.packets = ltime->packets; |
| 391 | x->curlft.add_time = ltime->add_time; |
| 392 | x->curlft.use_time = ltime->use_time; |
| 393 | } |
| 394 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 395 | if (et) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 396 | x->replay_maxage = nla_get_u32(et); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 397 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 398 | if (rt) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 399 | x->replay_maxdiff = nla_get_u32(rt); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 400 | } |
| 401 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 402 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
| 403 | struct xfrm_usersa_info *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 404 | struct nlattr **attrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | int *errp) |
| 406 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 407 | struct xfrm_state *x = xfrm_state_alloc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | int err = -ENOMEM; |
| 409 | |
| 410 | if (!x) |
| 411 | goto error_no_put; |
| 412 | |
| 413 | copy_from_user_state(x, p); |
| 414 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 415 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
| 416 | attrs[XFRMA_ALG_AEAD]))) |
| 417 | goto error; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 418 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
| 419 | attrs[XFRMA_ALG_AUTH_TRUNC]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | goto error; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 421 | if (!x->props.aalgo) { |
| 422 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, |
| 423 | attrs[XFRMA_ALG_AUTH]))) |
| 424 | goto error; |
| 425 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
| 427 | xfrm_ealg_get_byname, |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 428 | attrs[XFRMA_ALG_CRYPT]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | goto error; |
| 430 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, |
| 431 | xfrm_calg_get_byname, |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 432 | attrs[XFRMA_ALG_COMP]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | goto error; |
Thomas Graf | fd21150 | 2007-09-06 03:28:08 -0700 | [diff] [blame] | 434 | |
| 435 | if (attrs[XFRMA_ENCAP]) { |
| 436 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), |
| 437 | sizeof(*x->encap), GFP_KERNEL); |
| 438 | if (x->encap == NULL) |
| 439 | goto error; |
| 440 | } |
| 441 | |
| 442 | if (attrs[XFRMA_COADDR]) { |
| 443 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), |
| 444 | sizeof(*x->coaddr), GFP_KERNEL); |
| 445 | if (x->coaddr == NULL) |
| 446 | goto error; |
| 447 | } |
| 448 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 449 | xfrm_mark_get(attrs, &x->mark); |
| 450 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 451 | err = xfrm_init_state(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (err) |
| 453 | goto error; |
| 454 | |
Thomas Graf | fd21150 | 2007-09-06 03:28:08 -0700 | [diff] [blame] | 455 | if (attrs[XFRMA_SEC_CTX] && |
| 456 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 457 | goto error; |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | x->km.seq = p->seq; |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 460 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 461 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 462 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 463 | x->preplay.bitmap = 0; |
| 464 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; |
| 465 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; |
| 466 | |
| 467 | /* override default values from above */ |
| 468 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 469 | xfrm_update_ae_params(x, attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
| 471 | return x; |
| 472 | |
| 473 | error: |
| 474 | x->km.state = XFRM_STATE_DEAD; |
| 475 | xfrm_state_put(x); |
| 476 | error_no_put: |
| 477 | *errp = err; |
| 478 | return NULL; |
| 479 | } |
| 480 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 481 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 482 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 484 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 485 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | struct xfrm_state *x; |
| 487 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 488 | struct km_event c; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 489 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 490 | u32 sessionid = NETLINK_CB(skb).sessionid; |
| 491 | u32 sid = NETLINK_CB(skb).sid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 493 | err = verify_newsa_info(p, attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | if (err) |
| 495 | return err; |
| 496 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 497 | x = xfrm_state_construct(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (!x) |
| 499 | return err; |
| 500 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 501 | xfrm_state_hold(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
| 503 | err = xfrm_state_add(x); |
| 504 | else |
| 505 | err = xfrm_state_update(x); |
| 506 | |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 507 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (err < 0) { |
| 510 | x->km.state = XFRM_STATE_DEAD; |
Herbert Xu | 21380b8 | 2006-02-22 14:47:13 -0800 | [diff] [blame] | 511 | __xfrm_state_put(x); |
Patrick McHardy | 7d6dfe1 | 2005-06-18 22:45:31 -0700 | [diff] [blame] | 512 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 515 | c.seq = nlh->nlmsg_seq; |
| 516 | c.pid = nlh->nlmsg_pid; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 517 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 518 | |
| 519 | km_state_notify(x, &c); |
Patrick McHardy | 7d6dfe1 | 2005-06-18 22:45:31 -0700 | [diff] [blame] | 520 | out: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 521 | xfrm_state_put(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | return err; |
| 523 | } |
| 524 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 525 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
| 526 | struct xfrm_usersa_id *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 527 | struct nlattr **attrs, |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 528 | int *errp) |
| 529 | { |
| 530 | struct xfrm_state *x = NULL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 531 | struct xfrm_mark m; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 532 | int err; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 533 | u32 mark = xfrm_mark_get(attrs, &m); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 534 | |
| 535 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { |
| 536 | err = -ESRCH; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 537 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 538 | } else { |
| 539 | xfrm_address_t *saddr = NULL; |
| 540 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 541 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 542 | if (!saddr) { |
| 543 | err = -EINVAL; |
| 544 | goto out; |
| 545 | } |
| 546 | |
Masahide NAKAMURA | 9abbffe | 2006-11-24 20:34:51 -0800 | [diff] [blame] | 547 | err = -ESRCH; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 548 | x = xfrm_state_lookup_byaddr(net, mark, |
| 549 | &p->daddr, saddr, |
Alexey Dobriyan | 221df1e | 2008-11-25 17:30:50 -0800 | [diff] [blame] | 550 | p->proto, p->family); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | out: |
| 554 | if (!x && errp) |
| 555 | *errp = err; |
| 556 | return x; |
| 557 | } |
| 558 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 559 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 560 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 562 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | struct xfrm_state *x; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 564 | int err = -ESRCH; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 565 | struct km_event c; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 566 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 567 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 568 | u32 sessionid = NETLINK_CB(skb).sessionid; |
| 569 | u32 sid = NETLINK_CB(skb).sid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 571 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (x == NULL) |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 573 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
David S. Miller | 6f68dc3 | 2006-06-08 23:58:52 -0700 | [diff] [blame] | 575 | if ((err = security_xfrm_state_delete(x)) != 0) |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 576 | goto out; |
| 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | if (xfrm_state_kern(x)) { |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 579 | err = -EPERM; |
| 580 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
| 582 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 583 | err = xfrm_state_delete(x); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 584 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 585 | if (err < 0) |
| 586 | goto out; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 587 | |
| 588 | c.seq = nlh->nlmsg_seq; |
| 589 | c.pid = nlh->nlmsg_pid; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 590 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 591 | km_state_notify(x, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 593 | out: |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 594 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 595 | xfrm_state_put(x); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 596 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
| 600 | { |
| 601 | memcpy(&p->id, &x->id, sizeof(p->id)); |
| 602 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); |
| 603 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); |
| 604 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); |
| 605 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); |
David S. Miller | 54489c14 | 2006-10-27 15:29:47 -0700 | [diff] [blame] | 606 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | p->mode = x->props.mode; |
| 608 | p->replay_window = x->props.replay_window; |
| 609 | p->reqid = x->props.reqid; |
| 610 | p->family = x->props.family; |
| 611 | p->flags = x->props.flags; |
| 612 | p->seq = x->km.seq; |
| 613 | } |
| 614 | |
| 615 | struct xfrm_dump_info { |
| 616 | struct sk_buff *in_skb; |
| 617 | struct sk_buff *out_skb; |
| 618 | u32 nlmsg_seq; |
| 619 | u16 nlmsg_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | }; |
| 621 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 622 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
| 623 | { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 624 | struct xfrm_user_sec_ctx *uctx; |
| 625 | struct nlattr *attr; |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 626 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 627 | |
| 628 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); |
| 629 | if (attr == NULL) |
| 630 | return -EMSGSIZE; |
| 631 | |
| 632 | uctx = nla_data(attr); |
| 633 | uctx->exttype = XFRMA_SEC_CTX; |
| 634 | uctx->len = ctx_size; |
| 635 | uctx->ctx_doi = s->ctx_doi; |
| 636 | uctx->ctx_alg = s->ctx_alg; |
| 637 | uctx->ctx_len = s->ctx_len; |
| 638 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); |
| 639 | |
| 640 | return 0; |
| 641 | } |
| 642 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 643 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
| 644 | { |
| 645 | struct xfrm_algo *algo; |
| 646 | struct nlattr *nla; |
| 647 | |
| 648 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, |
| 649 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); |
| 650 | if (!nla) |
| 651 | return -EMSGSIZE; |
| 652 | |
| 653 | algo = nla_data(nla); |
| 654 | strcpy(algo->alg_name, auth->alg_name); |
| 655 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
| 656 | algo->alg_key_len = auth->alg_key_len; |
| 657 | |
| 658 | return 0; |
| 659 | } |
| 660 | |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 661 | /* Don't change this without updating xfrm_sa_len! */ |
| 662 | static int copy_to_user_state_extra(struct xfrm_state *x, |
| 663 | struct xfrm_usersa_info *p, |
| 664 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | copy_to_user_state(x, p); |
| 667 | |
Herbert Xu | 050f009 | 2007-10-09 13:31:47 -0700 | [diff] [blame] | 668 | if (x->coaddr) |
| 669 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); |
| 670 | |
| 671 | if (x->lastused) |
| 672 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); |
Herbert Xu | 050f009 | 2007-10-09 13:31:47 -0700 | [diff] [blame] | 673 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 674 | if (x->aead) |
| 675 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 676 | if (x->aalg) { |
| 677 | if (copy_to_user_auth(x->aalg, skb)) |
| 678 | goto nla_put_failure; |
| 679 | |
| 680 | NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC, |
| 681 | xfrm_alg_auth_len(x->aalg), x->aalg); |
| 682 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (x->ealg) |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 684 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | if (x->calg) |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 686 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | if (x->encap) |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 689 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 691 | if (xfrm_mark_put(skb, &x->mark)) |
| 692 | goto nla_put_failure; |
| 693 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 694 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
| 695 | goto nla_put_failure; |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 696 | |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 697 | return 0; |
| 698 | |
| 699 | nla_put_failure: |
| 700 | return -EMSGSIZE; |
| 701 | } |
| 702 | |
| 703 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) |
| 704 | { |
| 705 | struct xfrm_dump_info *sp = ptr; |
| 706 | struct sk_buff *in_skb = sp->in_skb; |
| 707 | struct sk_buff *skb = sp->out_skb; |
| 708 | struct xfrm_usersa_info *p; |
| 709 | struct nlmsghdr *nlh; |
| 710 | int err; |
| 711 | |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 712 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
| 713 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
| 714 | if (nlh == NULL) |
| 715 | return -EMSGSIZE; |
| 716 | |
| 717 | p = nlmsg_data(nlh); |
| 718 | |
| 719 | err = copy_to_user_state_extra(x, p, skb); |
| 720 | if (err) |
| 721 | goto nla_put_failure; |
| 722 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 723 | nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | return 0; |
| 725 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 726 | nla_put_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 727 | nlmsg_cancel(skb, nlh); |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 728 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 731 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
| 732 | { |
| 733 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
| 734 | xfrm_state_walk_done(walk); |
| 735 | return 0; |
| 736 | } |
| 737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
| 739 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 740 | struct net *net = sock_net(skb->sk); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 741 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | struct xfrm_dump_info info; |
| 743 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 744 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
| 745 | sizeof(cb->args) - sizeof(cb->args[0])); |
| 746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | info.in_skb = cb->skb; |
| 748 | info.out_skb = skb; |
| 749 | info.nlmsg_seq = cb->nlh->nlmsg_seq; |
| 750 | info.nlmsg_flags = NLM_F_MULTI; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 751 | |
| 752 | if (!cb->args[0]) { |
| 753 | cb->args[0] = 1; |
| 754 | xfrm_state_walk_init(walk, 0); |
| 755 | } |
| 756 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 757 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
| 759 | return skb->len; |
| 760 | } |
| 761 | |
| 762 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, |
| 763 | struct xfrm_state *x, u32 seq) |
| 764 | { |
| 765 | struct xfrm_dump_info info; |
| 766 | struct sk_buff *skb; |
| 767 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 768 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | if (!skb) |
| 770 | return ERR_PTR(-ENOMEM); |
| 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | info.in_skb = in_skb; |
| 773 | info.out_skb = skb; |
| 774 | info.nlmsg_seq = seq; |
| 775 | info.nlmsg_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
| 777 | if (dump_one_state(x, 0, &info)) { |
| 778 | kfree_skb(skb); |
| 779 | return NULL; |
| 780 | } |
| 781 | |
| 782 | return skb; |
| 783 | } |
| 784 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 785 | static inline size_t xfrm_spdinfo_msgsize(void) |
| 786 | { |
| 787 | return NLMSG_ALIGN(4) |
| 788 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) |
| 789 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); |
| 790 | } |
| 791 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 792 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
| 793 | u32 pid, u32 seq, u32 flags) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 794 | { |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 795 | struct xfrmk_spdinfo si; |
| 796 | struct xfrmu_spdinfo spc; |
| 797 | struct xfrmu_spdhinfo sph; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 798 | struct nlmsghdr *nlh; |
| 799 | u32 *f; |
| 800 | |
| 801 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
| 802 | if (nlh == NULL) /* shouldnt really happen ... */ |
| 803 | return -EMSGSIZE; |
| 804 | |
| 805 | f = nlmsg_data(nlh); |
| 806 | *f = flags; |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 807 | xfrm_spd_getinfo(net, &si); |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 808 | spc.incnt = si.incnt; |
| 809 | spc.outcnt = si.outcnt; |
| 810 | spc.fwdcnt = si.fwdcnt; |
| 811 | spc.inscnt = si.inscnt; |
| 812 | spc.outscnt = si.outscnt; |
| 813 | spc.fwdscnt = si.fwdscnt; |
| 814 | sph.spdhcnt = si.spdhcnt; |
| 815 | sph.spdhmcnt = si.spdhmcnt; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 816 | |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 817 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
| 818 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 819 | |
| 820 | return nlmsg_end(skb, nlh); |
| 821 | |
| 822 | nla_put_failure: |
| 823 | nlmsg_cancel(skb, nlh); |
| 824 | return -EMSGSIZE; |
| 825 | } |
| 826 | |
| 827 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 828 | struct nlattr **attrs) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 829 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 830 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 831 | struct sk_buff *r_skb; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 832 | u32 *flags = nlmsg_data(nlh); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 833 | u32 spid = NETLINK_CB(skb).pid; |
| 834 | u32 seq = nlh->nlmsg_seq; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 835 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 836 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 837 | if (r_skb == NULL) |
| 838 | return -ENOMEM; |
| 839 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 840 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 841 | BUG(); |
| 842 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 843 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 844 | } |
| 845 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 846 | static inline size_t xfrm_sadinfo_msgsize(void) |
| 847 | { |
| 848 | return NLMSG_ALIGN(4) |
| 849 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) |
| 850 | + nla_total_size(4); /* XFRMA_SAD_CNT */ |
| 851 | } |
| 852 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 853 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
| 854 | u32 pid, u32 seq, u32 flags) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 855 | { |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 856 | struct xfrmk_sadinfo si; |
| 857 | struct xfrmu_sadhinfo sh; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 858 | struct nlmsghdr *nlh; |
| 859 | u32 *f; |
| 860 | |
| 861 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
| 862 | if (nlh == NULL) /* shouldnt really happen ... */ |
| 863 | return -EMSGSIZE; |
| 864 | |
| 865 | f = nlmsg_data(nlh); |
| 866 | *f = flags; |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 867 | xfrm_sad_getinfo(net, &si); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 868 | |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 869 | sh.sadhmcnt = si.sadhmcnt; |
| 870 | sh.sadhcnt = si.sadhcnt; |
| 871 | |
| 872 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); |
| 873 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 874 | |
| 875 | return nlmsg_end(skb, nlh); |
| 876 | |
| 877 | nla_put_failure: |
| 878 | nlmsg_cancel(skb, nlh); |
| 879 | return -EMSGSIZE; |
| 880 | } |
| 881 | |
| 882 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 883 | struct nlattr **attrs) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 884 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 885 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 886 | struct sk_buff *r_skb; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 887 | u32 *flags = nlmsg_data(nlh); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 888 | u32 spid = NETLINK_CB(skb).pid; |
| 889 | u32 seq = nlh->nlmsg_seq; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 890 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 891 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 892 | if (r_skb == NULL) |
| 893 | return -ENOMEM; |
| 894 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 895 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 896 | BUG(); |
| 897 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 898 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 899 | } |
| 900 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 901 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 902 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 904 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 905 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | struct xfrm_state *x; |
| 907 | struct sk_buff *resp_skb; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 908 | int err = -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 910 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (x == NULL) |
| 912 | goto out_noput; |
| 913 | |
| 914 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
| 915 | if (IS_ERR(resp_skb)) { |
| 916 | err = PTR_ERR(resp_skb); |
| 917 | } else { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 918 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
| 920 | xfrm_state_put(x); |
| 921 | out_noput: |
| 922 | return err; |
| 923 | } |
| 924 | |
| 925 | static int verify_userspi_info(struct xfrm_userspi_info *p) |
| 926 | { |
| 927 | switch (p->info.id.proto) { |
| 928 | case IPPROTO_AH: |
| 929 | case IPPROTO_ESP: |
| 930 | break; |
| 931 | |
| 932 | case IPPROTO_COMP: |
| 933 | /* IPCOMP spi is 16-bits. */ |
| 934 | if (p->max >= 0x10000) |
| 935 | return -EINVAL; |
| 936 | break; |
| 937 | |
| 938 | default: |
| 939 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 940 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
| 942 | if (p->min > p->max) |
| 943 | return -EINVAL; |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 948 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 949 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 951 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | struct xfrm_state *x; |
| 953 | struct xfrm_userspi_info *p; |
| 954 | struct sk_buff *resp_skb; |
| 955 | xfrm_address_t *daddr; |
| 956 | int family; |
| 957 | int err; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 958 | u32 mark; |
| 959 | struct xfrm_mark m; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 961 | p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | err = verify_userspi_info(p); |
| 963 | if (err) |
| 964 | goto out_noput; |
| 965 | |
| 966 | family = p->info.family; |
| 967 | daddr = &p->info.id.daddr; |
| 968 | |
| 969 | x = NULL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 970 | |
| 971 | mark = xfrm_mark_get(attrs, &m); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (p->info.seq) { |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 973 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
| 975 | xfrm_state_put(x); |
| 976 | x = NULL; |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | if (!x) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 981 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | p->info.id.proto, daddr, |
| 983 | &p->info.saddr, 1, |
| 984 | family); |
| 985 | err = -ENOENT; |
| 986 | if (x == NULL) |
| 987 | goto out_noput; |
| 988 | |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 989 | err = xfrm_alloc_spi(x, p->min, p->max); |
| 990 | if (err) |
| 991 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 993 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | if (IS_ERR(resp_skb)) { |
| 995 | err = PTR_ERR(resp_skb); |
| 996 | goto out; |
| 997 | } |
| 998 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 999 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
| 1001 | out: |
| 1002 | xfrm_state_put(x); |
| 1003 | out_noput: |
| 1004 | return err; |
| 1005 | } |
| 1006 | |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1007 | static int verify_policy_dir(u8 dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
| 1009 | switch (dir) { |
| 1010 | case XFRM_POLICY_IN: |
| 1011 | case XFRM_POLICY_OUT: |
| 1012 | case XFRM_POLICY_FWD: |
| 1013 | break; |
| 1014 | |
| 1015 | default: |
| 1016 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1017 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | return 0; |
| 1020 | } |
| 1021 | |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1022 | static int verify_policy_type(u8 type) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1023 | { |
| 1024 | switch (type) { |
| 1025 | case XFRM_POLICY_TYPE_MAIN: |
| 1026 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1027 | case XFRM_POLICY_TYPE_SUB: |
| 1028 | #endif |
| 1029 | break; |
| 1030 | |
| 1031 | default: |
| 1032 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1033 | } |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1034 | |
| 1035 | return 0; |
| 1036 | } |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
| 1039 | { |
| 1040 | switch (p->share) { |
| 1041 | case XFRM_SHARE_ANY: |
| 1042 | case XFRM_SHARE_SESSION: |
| 1043 | case XFRM_SHARE_USER: |
| 1044 | case XFRM_SHARE_UNIQUE: |
| 1045 | break; |
| 1046 | |
| 1047 | default: |
| 1048 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1049 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
| 1051 | switch (p->action) { |
| 1052 | case XFRM_POLICY_ALLOW: |
| 1053 | case XFRM_POLICY_BLOCK: |
| 1054 | break; |
| 1055 | |
| 1056 | default: |
| 1057 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
| 1060 | switch (p->sel.family) { |
| 1061 | case AF_INET: |
| 1062 | break; |
| 1063 | |
| 1064 | case AF_INET6: |
| 1065 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 1066 | break; |
| 1067 | #else |
| 1068 | return -EAFNOSUPPORT; |
| 1069 | #endif |
| 1070 | |
| 1071 | default: |
| 1072 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1073 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
| 1075 | return verify_policy_dir(p->dir); |
| 1076 | } |
| 1077 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1078 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1079 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1080 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1081 | struct xfrm_user_sec_ctx *uctx; |
| 1082 | |
| 1083 | if (!rt) |
| 1084 | return 0; |
| 1085 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1086 | uctx = nla_data(rt); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1087 | return security_xfrm_policy_alloc(&pol->security, uctx); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1088 | } |
| 1089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
| 1091 | int nr) |
| 1092 | { |
| 1093 | int i; |
| 1094 | |
| 1095 | xp->xfrm_nr = nr; |
| 1096 | for (i = 0; i < nr; i++, ut++) { |
| 1097 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; |
| 1098 | |
| 1099 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); |
| 1100 | memcpy(&t->saddr, &ut->saddr, |
| 1101 | sizeof(xfrm_address_t)); |
| 1102 | t->reqid = ut->reqid; |
| 1103 | t->mode = ut->mode; |
| 1104 | t->share = ut->share; |
| 1105 | t->optional = ut->optional; |
| 1106 | t->aalgos = ut->aalgos; |
| 1107 | t->ealgos = ut->ealgos; |
| 1108 | t->calgos = ut->calgos; |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 1109 | /* If all masks are ~0, then we allow all algorithms. */ |
| 1110 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); |
Miika Komu | 8511d01 | 2006-11-30 16:40:51 -0800 | [diff] [blame] | 1111 | t->encap_family = ut->family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | } |
| 1113 | } |
| 1114 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1115 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
| 1116 | { |
| 1117 | int i; |
| 1118 | |
| 1119 | if (nr > XFRM_MAX_DEPTH) |
| 1120 | return -EINVAL; |
| 1121 | |
| 1122 | for (i = 0; i < nr; i++) { |
| 1123 | /* We never validated the ut->family value, so many |
| 1124 | * applications simply leave it at zero. The check was |
| 1125 | * never made and ut->family was ignored because all |
| 1126 | * templates could be assumed to have the same family as |
| 1127 | * the policy itself. Now that we will have ipv4-in-ipv6 |
| 1128 | * and ipv6-in-ipv4 tunnels, this is no longer true. |
| 1129 | */ |
| 1130 | if (!ut[i].family) |
| 1131 | ut[i].family = family; |
| 1132 | |
| 1133 | switch (ut[i].family) { |
| 1134 | case AF_INET: |
| 1135 | break; |
| 1136 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 1137 | case AF_INET6: |
| 1138 | break; |
| 1139 | #endif |
| 1140 | default: |
| 1141 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1142 | } |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | return 0; |
| 1146 | } |
| 1147 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1148 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1150 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | if (!rt) { |
| 1153 | pol->xfrm_nr = 0; |
| 1154 | } else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1155 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
| 1156 | int nr = nla_len(rt) / sizeof(*utmpl); |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1157 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1159 | err = validate_tmpl(nr, utmpl, pol->family); |
| 1160 | if (err) |
| 1161 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1163 | copy_templates(pol, utmpl, nr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | } |
| 1165 | return 0; |
| 1166 | } |
| 1167 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1168 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1169 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1170 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1171 | struct xfrm_userpolicy_type *upt; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1172 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1173 | int err; |
| 1174 | |
| 1175 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1176 | upt = nla_data(rt); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1177 | type = upt->type; |
| 1178 | } |
| 1179 | |
| 1180 | err = verify_policy_type(type); |
| 1181 | if (err) |
| 1182 | return err; |
| 1183 | |
| 1184 | *tp = type; |
| 1185 | return 0; |
| 1186 | } |
| 1187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
| 1189 | { |
| 1190 | xp->priority = p->priority; |
| 1191 | xp->index = p->index; |
| 1192 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); |
| 1193 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); |
| 1194 | xp->action = p->action; |
| 1195 | xp->flags = p->flags; |
| 1196 | xp->family = p->sel.family; |
| 1197 | /* XXX xp->share = p->share; */ |
| 1198 | } |
| 1199 | |
| 1200 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) |
| 1201 | { |
| 1202 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
| 1203 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); |
| 1204 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); |
| 1205 | p->priority = xp->priority; |
| 1206 | p->index = xp->index; |
| 1207 | p->sel.family = xp->family; |
| 1208 | p->dir = dir; |
| 1209 | p->action = xp->action; |
| 1210 | p->flags = xp->flags; |
| 1211 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ |
| 1212 | } |
| 1213 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1214 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1216 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | int err; |
| 1218 | |
| 1219 | if (!xp) { |
| 1220 | *errp = -ENOMEM; |
| 1221 | return NULL; |
| 1222 | } |
| 1223 | |
| 1224 | copy_from_user_policy(xp, p); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1225 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1226 | err = copy_from_user_policy_type(&xp->type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1227 | if (err) |
| 1228 | goto error; |
| 1229 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1230 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
| 1231 | err = copy_from_user_sec_ctx(xp, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1232 | if (err) |
| 1233 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1235 | xfrm_mark_get(attrs, &xp->mark); |
| 1236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | return xp; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1238 | error: |
| 1239 | *errp = err; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1240 | xp->walk.dead = 1; |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 1241 | xfrm_policy_destroy(xp); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1242 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | } |
| 1244 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1245 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1246 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1248 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1249 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | struct xfrm_policy *xp; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1251 | struct km_event c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | int err; |
| 1253 | int excl; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1254 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 1255 | u32 sessionid = NETLINK_CB(skb).sessionid; |
| 1256 | u32 sid = NETLINK_CB(skb).sid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | |
| 1258 | err = verify_newpolicy_info(p); |
| 1259 | if (err) |
| 1260 | return err; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1261 | err = verify_sec_ctx_len(attrs); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1262 | if (err) |
| 1263 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1265 | xp = xfrm_policy_construct(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | if (!xp) |
| 1267 | return err; |
| 1268 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1269 | /* shouldnt excl be based on nlh flags?? |
| 1270 | * Aha! this is anti-netlink really i.e more pfkey derived |
| 1271 | * in netlink excl is a flag and you wouldnt need |
| 1272 | * a type XFRM_MSG_UPDPOLICY - JHS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
| 1274 | err = xfrm_policy_insert(p->dir, xp, excl); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1275 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | if (err) { |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1278 | security_xfrm_policy_free(xp->security); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | kfree(xp); |
| 1280 | return err; |
| 1281 | } |
| 1282 | |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1283 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1284 | c.seq = nlh->nlmsg_seq; |
| 1285 | c.pid = nlh->nlmsg_pid; |
| 1286 | km_policy_notify(xp, p->dir, &c); |
| 1287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | xfrm_pol_put(xp); |
| 1289 | |
| 1290 | return 0; |
| 1291 | } |
| 1292 | |
| 1293 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) |
| 1294 | { |
| 1295 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; |
| 1296 | int i; |
| 1297 | |
| 1298 | if (xp->xfrm_nr == 0) |
| 1299 | return 0; |
| 1300 | |
| 1301 | for (i = 0; i < xp->xfrm_nr; i++) { |
| 1302 | struct xfrm_user_tmpl *up = &vec[i]; |
| 1303 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; |
| 1304 | |
| 1305 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
Miika Komu | 8511d01 | 2006-11-30 16:40:51 -0800 | [diff] [blame] | 1306 | up->family = kp->encap_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
| 1308 | up->reqid = kp->reqid; |
| 1309 | up->mode = kp->mode; |
| 1310 | up->share = kp->share; |
| 1311 | up->optional = kp->optional; |
| 1312 | up->aalgos = kp->aalgos; |
| 1313 | up->ealgos = kp->ealgos; |
| 1314 | up->calgos = kp->calgos; |
| 1315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1317 | return nla_put(skb, XFRMA_TMPL, |
| 1318 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1319 | } |
| 1320 | |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1321 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) |
| 1322 | { |
| 1323 | if (x->security) { |
| 1324 | return copy_sec_ctx(x->security, skb); |
| 1325 | } |
| 1326 | return 0; |
| 1327 | } |
| 1328 | |
| 1329 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
| 1330 | { |
| 1331 | if (xp->security) { |
| 1332 | return copy_sec_ctx(xp->security, skb); |
| 1333 | } |
| 1334 | return 0; |
| 1335 | } |
Thomas Graf | cfbfd45 | 2007-08-22 13:57:04 -0700 | [diff] [blame] | 1336 | static inline size_t userpolicy_type_attrsize(void) |
| 1337 | { |
| 1338 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1339 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); |
| 1340 | #else |
| 1341 | return 0; |
| 1342 | #endif |
| 1343 | } |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1344 | |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1345 | #ifdef CONFIG_XFRM_SUB_POLICY |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1346 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1347 | { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1348 | struct xfrm_userpolicy_type upt = { |
| 1349 | .type = type, |
| 1350 | }; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1351 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1352 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | #else |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1356 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1357 | { |
| 1358 | return 0; |
| 1359 | } |
| 1360 | #endif |
| 1361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
| 1363 | { |
| 1364 | struct xfrm_dump_info *sp = ptr; |
| 1365 | struct xfrm_userpolicy_info *p; |
| 1366 | struct sk_buff *in_skb = sp->in_skb; |
| 1367 | struct sk_buff *skb = sp->out_skb; |
| 1368 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 1370 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
| 1371 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
| 1372 | if (nlh == NULL) |
| 1373 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1375 | p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | copy_to_user_policy(xp, p, dir); |
| 1377 | if (copy_to_user_tmpl(xp, skb) < 0) |
| 1378 | goto nlmsg_failure; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1379 | if (copy_to_user_sec_ctx(xp, skb)) |
| 1380 | goto nlmsg_failure; |
Jamal Hadi Salim | 1459bb3 | 2006-11-20 16:51:22 -0800 | [diff] [blame] | 1381 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1382 | goto nlmsg_failure; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1383 | if (xfrm_mark_put(skb, &xp->mark)) |
| 1384 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1386 | nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | return 0; |
| 1388 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1389 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | nlmsg_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1391 | nlmsg_cancel(skb, nlh); |
| 1392 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | } |
| 1394 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1395 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
| 1396 | { |
| 1397 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
| 1398 | |
| 1399 | xfrm_policy_walk_done(walk); |
| 1400 | return 0; |
| 1401 | } |
| 1402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
| 1404 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1405 | struct net *net = sock_net(skb->sk); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1406 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | struct xfrm_dump_info info; |
| 1408 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1409 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
| 1410 | sizeof(cb->args) - sizeof(cb->args[0])); |
| 1411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | info.in_skb = cb->skb; |
| 1413 | info.out_skb = skb; |
| 1414 | info.nlmsg_seq = cb->nlh->nlmsg_seq; |
| 1415 | info.nlmsg_flags = NLM_F_MULTI; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1416 | |
| 1417 | if (!cb->args[0]) { |
| 1418 | cb->args[0] = 1; |
| 1419 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); |
| 1420 | } |
| 1421 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1422 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | |
| 1424 | return skb->len; |
| 1425 | } |
| 1426 | |
| 1427 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, |
| 1428 | struct xfrm_policy *xp, |
| 1429 | int dir, u32 seq) |
| 1430 | { |
| 1431 | struct xfrm_dump_info info; |
| 1432 | struct sk_buff *skb; |
| 1433 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1434 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | if (!skb) |
| 1436 | return ERR_PTR(-ENOMEM); |
| 1437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | info.in_skb = in_skb; |
| 1439 | info.out_skb = skb; |
| 1440 | info.nlmsg_seq = seq; |
| 1441 | info.nlmsg_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
| 1443 | if (dump_one_policy(xp, dir, 0, &info) < 0) { |
| 1444 | kfree_skb(skb); |
| 1445 | return NULL; |
| 1446 | } |
| 1447 | |
| 1448 | return skb; |
| 1449 | } |
| 1450 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1451 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1452 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1454 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | struct xfrm_policy *xp; |
| 1456 | struct xfrm_userpolicy_id *p; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1457 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1459 | struct km_event c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | int delete; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1461 | struct xfrm_mark m; |
| 1462 | u32 mark = xfrm_mark_get(attrs, &m); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1464 | p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
| 1466 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1467 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1468 | if (err) |
| 1469 | return err; |
| 1470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | err = verify_policy_dir(p->dir); |
| 1472 | if (err) |
| 1473 | return err; |
| 1474 | |
| 1475 | if (p->index) |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1476 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1477 | else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1478 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1479 | struct xfrm_sec_ctx *ctx; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1480 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1481 | err = verify_sec_ctx_len(attrs); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1482 | if (err) |
| 1483 | return err; |
| 1484 | |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1485 | ctx = NULL; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1486 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1487 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1488 | |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1489 | err = security_xfrm_policy_alloc(&ctx, uctx); |
| 1490 | if (err) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1491 | return err; |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1492 | } |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1493 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1494 | ctx, delete, &err); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1495 | security_xfrm_policy_free(ctx); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1496 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | if (xp == NULL) |
| 1498 | return -ENOENT; |
| 1499 | |
| 1500 | if (!delete) { |
| 1501 | struct sk_buff *resp_skb; |
| 1502 | |
| 1503 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); |
| 1504 | if (IS_ERR(resp_skb)) { |
| 1505 | err = PTR_ERR(resp_skb); |
| 1506 | } else { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1507 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
Thomas Graf | 082a1ad | 2007-08-22 13:54:36 -0700 | [diff] [blame] | 1508 | NETLINK_CB(skb).pid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1510 | } else { |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1511 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 1512 | u32 sessionid = NETLINK_CB(skb).sessionid; |
| 1513 | u32 sid = NETLINK_CB(skb).sid; |
| 1514 | |
| 1515 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
| 1516 | sid); |
David S. Miller | 13fcfbb0 | 2007-02-12 13:53:54 -0800 | [diff] [blame] | 1517 | |
| 1518 | if (err != 0) |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 1519 | goto out; |
David S. Miller | 13fcfbb0 | 2007-02-12 13:53:54 -0800 | [diff] [blame] | 1520 | |
Herbert Xu | e744389 | 2005-06-18 22:44:18 -0700 | [diff] [blame] | 1521 | c.data.byid = p->index; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1522 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1523 | c.seq = nlh->nlmsg_seq; |
| 1524 | c.pid = nlh->nlmsg_pid; |
| 1525 | km_policy_notify(xp, p->dir, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | } |
| 1527 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 1528 | out: |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1529 | xfrm_pol_put(xp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | return err; |
| 1531 | } |
| 1532 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1533 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1534 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1536 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1537 | struct km_event c; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1538 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1539 | struct xfrm_audit audit_info; |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 1540 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1542 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1543 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1544 | audit_info.secid = NETLINK_CB(skb).sid; |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1545 | err = xfrm_state_flush(net, p->proto, &audit_info); |
Jamal Hadi Salim | 9e64cc9 | 2010-02-19 02:00:41 +0000 | [diff] [blame] | 1546 | if (err) { |
| 1547 | if (err == -ESRCH) /* empty table */ |
| 1548 | return 0; |
David S. Miller | 069c474 | 2010-02-17 13:41:40 -0800 | [diff] [blame] | 1549 | return err; |
Jamal Hadi Salim | 9e64cc9 | 2010-02-19 02:00:41 +0000 | [diff] [blame] | 1550 | } |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 1551 | c.data.proto = p->proto; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1552 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1553 | c.seq = nlh->nlmsg_seq; |
| 1554 | c.pid = nlh->nlmsg_pid; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 1555 | c.net = net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1556 | km_state_notify(NULL, &c); |
| 1557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | return 0; |
| 1559 | } |
| 1560 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1561 | static inline size_t xfrm_aevent_msgsize(void) |
| 1562 | { |
| 1563 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
| 1564 | + nla_total_size(sizeof(struct xfrm_replay_state)) |
| 1565 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1566 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1567 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
| 1568 | + nla_total_size(4); /* XFRM_AE_ETHR */ |
| 1569 | } |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1570 | |
| 1571 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
| 1572 | { |
| 1573 | struct xfrm_aevent_id *id; |
| 1574 | struct nlmsghdr *nlh; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1575 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 1576 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
| 1577 | if (nlh == NULL) |
| 1578 | return -EMSGSIZE; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1579 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1580 | id = nlmsg_data(nlh); |
Jamal Hadi Salim | 2b5f6dc | 2006-12-02 22:22:25 -0800 | [diff] [blame] | 1581 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1582 | id->sa_id.spi = x->id.spi; |
| 1583 | id->sa_id.family = x->props.family; |
| 1584 | id->sa_id.proto = x->id.proto; |
Jamal Hadi Salim | 2b5f6dc | 2006-12-02 22:22:25 -0800 | [diff] [blame] | 1585 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
| 1586 | id->reqid = x->props.reqid; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1587 | id->flags = c->data.aevent; |
| 1588 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1589 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
| 1590 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1591 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1592 | if (id->flags & XFRM_AE_RTHR) |
| 1593 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1594 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1595 | if (id->flags & XFRM_AE_ETHR) |
| 1596 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, |
| 1597 | x->replay_maxage * 10 / HZ); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1598 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1599 | if (xfrm_mark_put(skb, &x->mark)) |
| 1600 | goto nla_put_failure; |
| 1601 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1602 | return nlmsg_end(skb, nlh); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1603 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1604 | nla_put_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1605 | nlmsg_cancel(skb, nlh); |
| 1606 | return -EMSGSIZE; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1607 | } |
| 1608 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1609 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1610 | struct nlattr **attrs) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1611 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1612 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1613 | struct xfrm_state *x; |
| 1614 | struct sk_buff *r_skb; |
| 1615 | int err; |
| 1616 | struct km_event c; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1617 | u32 mark; |
| 1618 | struct xfrm_mark m; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1619 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1620 | struct xfrm_usersa_id *id = &p->sa_id; |
| 1621 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1622 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1623 | if (r_skb == NULL) |
| 1624 | return -ENOMEM; |
| 1625 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1626 | mark = xfrm_mark_get(attrs, &m); |
| 1627 | |
| 1628 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1629 | if (x == NULL) { |
Patrick McHardy | b08d584 | 2007-02-27 09:57:37 -0800 | [diff] [blame] | 1630 | kfree_skb(r_skb); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1631 | return -ESRCH; |
| 1632 | } |
| 1633 | |
| 1634 | /* |
| 1635 | * XXX: is this lock really needed - none of the other |
| 1636 | * gets lock (the concern is things getting updated |
| 1637 | * while we are still reading) - jhs |
| 1638 | */ |
| 1639 | spin_lock_bh(&x->lock); |
| 1640 | c.data.aevent = p->flags; |
| 1641 | c.seq = nlh->nlmsg_seq; |
| 1642 | c.pid = nlh->nlmsg_pid; |
| 1643 | |
| 1644 | if (build_aevent(r_skb, x, &c) < 0) |
| 1645 | BUG(); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1646 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1647 | spin_unlock_bh(&x->lock); |
| 1648 | xfrm_state_put(x); |
| 1649 | return err; |
| 1650 | } |
| 1651 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1652 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1653 | struct nlattr **attrs) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1654 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1655 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1656 | struct xfrm_state *x; |
| 1657 | struct km_event c; |
| 1658 | int err = - EINVAL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1659 | u32 mark = 0; |
| 1660 | struct xfrm_mark m; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1661 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1662 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
| 1663 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1664 | |
| 1665 | if (!lt && !rp) |
| 1666 | return err; |
| 1667 | |
| 1668 | /* pedantic mode - thou shalt sayeth replaceth */ |
| 1669 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) |
| 1670 | return err; |
| 1671 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1672 | mark = xfrm_mark_get(attrs, &m); |
| 1673 | |
| 1674 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1675 | if (x == NULL) |
| 1676 | return -ESRCH; |
| 1677 | |
| 1678 | if (x->km.state != XFRM_STATE_VALID) |
| 1679 | goto out; |
| 1680 | |
| 1681 | spin_lock_bh(&x->lock); |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1682 | xfrm_update_ae_params(x, attrs); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1683 | spin_unlock_bh(&x->lock); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1684 | |
| 1685 | c.event = nlh->nlmsg_type; |
| 1686 | c.seq = nlh->nlmsg_seq; |
| 1687 | c.pid = nlh->nlmsg_pid; |
| 1688 | c.data.aevent = XFRM_AE_CU; |
| 1689 | km_state_notify(x, &c); |
| 1690 | err = 0; |
| 1691 | out: |
| 1692 | xfrm_state_put(x); |
| 1693 | return err; |
| 1694 | } |
| 1695 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1696 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1697 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1699 | struct net *net = sock_net(skb->sk); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1700 | struct km_event c; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1701 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1702 | int err; |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1703 | struct xfrm_audit audit_info; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1704 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1705 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1706 | if (err) |
| 1707 | return err; |
| 1708 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1709 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1710 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1711 | audit_info.secid = NETLINK_CB(skb).sid; |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1712 | err = xfrm_policy_flush(net, type, &audit_info); |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 1713 | if (err) { |
| 1714 | if (err == -ESRCH) /* empty table */ |
| 1715 | return 0; |
David S. Miller | 069c474 | 2010-02-17 13:41:40 -0800 | [diff] [blame] | 1716 | return err; |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 1717 | } |
| 1718 | |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1719 | c.data.type = type; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1720 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1721 | c.seq = nlh->nlmsg_seq; |
| 1722 | c.pid = nlh->nlmsg_pid; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 1723 | c.net = net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1724 | km_policy_notify(NULL, 0, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | return 0; |
| 1726 | } |
| 1727 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1728 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1729 | struct nlattr **attrs) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1730 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1731 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1732 | struct xfrm_policy *xp; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1733 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1734 | struct xfrm_userpolicy_info *p = &up->pol; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1735 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1736 | int err = -ENOENT; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1737 | struct xfrm_mark m; |
| 1738 | u32 mark = xfrm_mark_get(attrs, &m); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1739 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1740 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1741 | if (err) |
| 1742 | return err; |
| 1743 | |
Timo Teräs | c8bf4d0 | 2010-03-31 00:17:04 +0000 | [diff] [blame] | 1744 | err = verify_policy_dir(p->dir); |
| 1745 | if (err) |
| 1746 | return err; |
| 1747 | |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1748 | if (p->index) |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1749 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1750 | else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1751 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1752 | struct xfrm_sec_ctx *ctx; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1753 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1754 | err = verify_sec_ctx_len(attrs); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1755 | if (err) |
| 1756 | return err; |
| 1757 | |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1758 | ctx = NULL; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1759 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1760 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1761 | |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1762 | err = security_xfrm_policy_alloc(&ctx, uctx); |
| 1763 | if (err) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1764 | return err; |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1765 | } |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1766 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1767 | &p->sel, ctx, 0, &err); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1768 | security_xfrm_policy_free(ctx); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1769 | } |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1770 | if (xp == NULL) |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1771 | return -ENOENT; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1772 | |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 1773 | if (unlikely(xp->walk.dead)) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1774 | goto out; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1775 | |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1776 | err = 0; |
| 1777 | if (up->hard) { |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1778 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 1779 | uid_t sessionid = NETLINK_CB(skb).sessionid; |
| 1780 | u32 sid = NETLINK_CB(skb).sid; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1781 | xfrm_policy_delete(xp, p->dir); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1782 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1783 | |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1784 | } else { |
| 1785 | // reset the timers here? |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 1786 | WARN(1, "Dont know what to do with soft policy expire\n"); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 1787 | } |
| 1788 | km_policy_expired(xp, p->dir, up->hard, current->pid); |
| 1789 | |
| 1790 | out: |
| 1791 | xfrm_pol_put(xp); |
| 1792 | return err; |
| 1793 | } |
| 1794 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1795 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1796 | struct nlattr **attrs) |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1797 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1798 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1799 | struct xfrm_state *x; |
| 1800 | int err; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1801 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1802 | struct xfrm_usersa_info *p = &ue->state; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1803 | struct xfrm_mark m; |
| 1804 | u32 mark = xfrm_mark_get(attrs, &m);; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1805 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1806 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1807 | |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 1808 | err = -ENOENT; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1809 | if (x == NULL) |
| 1810 | return err; |
| 1811 | |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1812 | spin_lock_bh(&x->lock); |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 1813 | err = -EINVAL; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1814 | if (x->km.state != XFRM_STATE_VALID) |
| 1815 | goto out; |
| 1816 | km_state_expired(x, ue->hard, current->pid); |
| 1817 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1818 | if (ue->hard) { |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1819 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
| 1820 | uid_t sessionid = NETLINK_CB(skb).sessionid; |
| 1821 | u32 sid = NETLINK_CB(skb).sid; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1822 | __xfrm_state_delete(x); |
Eric Paris | 2532386 | 2008-04-18 10:09:25 -0400 | [diff] [blame] | 1823 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1824 | } |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 1825 | err = 0; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 1826 | out: |
| 1827 | spin_unlock_bh(&x->lock); |
| 1828 | xfrm_state_put(x); |
| 1829 | return err; |
| 1830 | } |
| 1831 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1832 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1833 | struct nlattr **attrs) |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1834 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1835 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1836 | struct xfrm_policy *xp; |
| 1837 | struct xfrm_user_tmpl *ut; |
| 1838 | int i; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1839 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1840 | struct xfrm_mark mark; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1841 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1842 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1843 | struct xfrm_state *x = xfrm_state_alloc(net); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1844 | int err = -ENOMEM; |
| 1845 | |
| 1846 | if (!x) |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 1847 | goto nomem; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1848 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1849 | xfrm_mark_get(attrs, &mark); |
| 1850 | |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1851 | err = verify_newpolicy_info(&ua->policy); |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 1852 | if (err) |
| 1853 | goto bad_policy; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1854 | |
| 1855 | /* build an XP */ |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1856 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 1857 | if (!xp) |
| 1858 | goto free_state; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1859 | |
| 1860 | memcpy(&x->id, &ua->id, sizeof(ua->id)); |
| 1861 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); |
| 1862 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1863 | xp->mark.m = x->mark.m = mark.m; |
| 1864 | xp->mark.v = x->mark.v = mark.v; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1865 | ut = nla_data(rt); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1866 | /* extract the templates and for each call km_key */ |
| 1867 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { |
| 1868 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; |
| 1869 | memcpy(&x->id, &t->id, sizeof(x->id)); |
| 1870 | x->props.mode = t->mode; |
| 1871 | x->props.reqid = t->reqid; |
| 1872 | x->props.family = ut->family; |
| 1873 | t->aalgos = ua->aalgos; |
| 1874 | t->ealgos = ua->ealgos; |
| 1875 | t->calgos = ua->calgos; |
| 1876 | err = km_query(x, t, xp); |
| 1877 | |
| 1878 | } |
| 1879 | |
| 1880 | kfree(x); |
| 1881 | kfree(xp); |
| 1882 | |
| 1883 | return 0; |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 1884 | |
| 1885 | bad_policy: |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 1886 | WARN(1, "BAD policy passed\n"); |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 1887 | free_state: |
| 1888 | kfree(x); |
| 1889 | nomem: |
| 1890 | return err; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 1891 | } |
| 1892 | |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1893 | #ifdef CONFIG_XFRM_MIGRATE |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1894 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1895 | struct xfrm_kmaddress *k, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1896 | struct nlattr **attrs, int *num) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1897 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1898 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1899 | struct xfrm_user_migrate *um; |
| 1900 | int i, num_migrate; |
| 1901 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1902 | if (k != NULL) { |
| 1903 | struct xfrm_user_kmaddress *uk; |
| 1904 | |
| 1905 | uk = nla_data(attrs[XFRMA_KMADDRESS]); |
| 1906 | memcpy(&k->local, &uk->local, sizeof(k->local)); |
| 1907 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); |
| 1908 | k->family = uk->family; |
| 1909 | k->reserved = uk->reserved; |
| 1910 | } |
| 1911 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1912 | um = nla_data(rt); |
| 1913 | num_migrate = nla_len(rt) / sizeof(*um); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1914 | |
| 1915 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) |
| 1916 | return -EINVAL; |
| 1917 | |
| 1918 | for (i = 0; i < num_migrate; i++, um++, ma++) { |
| 1919 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); |
| 1920 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); |
| 1921 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); |
| 1922 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); |
| 1923 | |
| 1924 | ma->proto = um->proto; |
| 1925 | ma->mode = um->mode; |
| 1926 | ma->reqid = um->reqid; |
| 1927 | |
| 1928 | ma->old_family = um->old_family; |
| 1929 | ma->new_family = um->new_family; |
| 1930 | } |
| 1931 | |
| 1932 | *num = i; |
| 1933 | return 0; |
| 1934 | } |
| 1935 | |
| 1936 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1937 | struct nlattr **attrs) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1938 | { |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1939 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1940 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1941 | struct xfrm_kmaddress km, *kmp; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1942 | u8 type; |
| 1943 | int err; |
| 1944 | int n = 0; |
| 1945 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1946 | if (attrs[XFRMA_MIGRATE] == NULL) |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 1947 | return -EINVAL; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1948 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1949 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
| 1950 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1951 | err = copy_from_user_policy_type(&type, attrs); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1952 | if (err) |
| 1953 | return err; |
| 1954 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1955 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1956 | if (err) |
| 1957 | return err; |
| 1958 | |
| 1959 | if (!n) |
| 1960 | return 0; |
| 1961 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1962 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1963 | |
| 1964 | return 0; |
| 1965 | } |
| 1966 | #else |
| 1967 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1968 | struct nlattr **attrs) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1969 | { |
| 1970 | return -ENOPROTOOPT; |
| 1971 | } |
| 1972 | #endif |
| 1973 | |
| 1974 | #ifdef CONFIG_XFRM_MIGRATE |
| 1975 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) |
| 1976 | { |
| 1977 | struct xfrm_user_migrate um; |
| 1978 | |
| 1979 | memset(&um, 0, sizeof(um)); |
| 1980 | um.proto = m->proto; |
| 1981 | um.mode = m->mode; |
| 1982 | um.reqid = m->reqid; |
| 1983 | um.old_family = m->old_family; |
| 1984 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); |
| 1985 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); |
| 1986 | um.new_family = m->new_family; |
| 1987 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); |
| 1988 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); |
| 1989 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1990 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 1991 | } |
| 1992 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 1993 | static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) |
| 1994 | { |
| 1995 | struct xfrm_user_kmaddress uk; |
| 1996 | |
| 1997 | memset(&uk, 0, sizeof(uk)); |
| 1998 | uk.family = k->family; |
| 1999 | uk.reserved = k->reserved; |
| 2000 | memcpy(&uk.local, &k->local, sizeof(uk.local)); |
Arnaud Ebalard | a1caa32 | 2008-11-03 01:30:23 -0800 | [diff] [blame] | 2001 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2002 | |
| 2003 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); |
| 2004 | } |
| 2005 | |
| 2006 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2007 | { |
| 2008 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2009 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
| 2010 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) |
| 2011 | + userpolicy_type_attrsize(); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2012 | } |
| 2013 | |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2014 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2015 | int num_migrate, struct xfrm_kmaddress *k, |
| 2016 | struct xfrm_selector *sel, u8 dir, u8 type) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2017 | { |
| 2018 | struct xfrm_migrate *mp; |
| 2019 | struct xfrm_userpolicy_id *pol_id; |
| 2020 | struct nlmsghdr *nlh; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2021 | int i; |
| 2022 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2023 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
| 2024 | if (nlh == NULL) |
| 2025 | return -EMSGSIZE; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2026 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2027 | pol_id = nlmsg_data(nlh); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2028 | /* copy data from selector, dir, and type to the pol_id */ |
| 2029 | memset(pol_id, 0, sizeof(*pol_id)); |
| 2030 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); |
| 2031 | pol_id->dir = dir; |
| 2032 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2033 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
| 2034 | goto nlmsg_failure; |
| 2035 | |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2036 | if (copy_to_user_policy_type(type, skb) < 0) |
| 2037 | goto nlmsg_failure; |
| 2038 | |
| 2039 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
| 2040 | if (copy_to_user_migrate(mp, skb) < 0) |
| 2041 | goto nlmsg_failure; |
| 2042 | } |
| 2043 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2044 | return nlmsg_end(skb, nlh); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2045 | nlmsg_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2046 | nlmsg_cancel(skb, nlh); |
| 2047 | return -EMSGSIZE; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2048 | } |
| 2049 | |
| 2050 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2051 | struct xfrm_migrate *m, int num_migrate, |
| 2052 | struct xfrm_kmaddress *k) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2053 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2054 | struct net *net = &init_net; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2055 | struct sk_buff *skb; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2056 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2057 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2058 | if (skb == NULL) |
| 2059 | return -ENOMEM; |
| 2060 | |
| 2061 | /* build migrate */ |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2062 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2063 | BUG(); |
| 2064 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2065 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2066 | } |
| 2067 | #else |
| 2068 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2069 | struct xfrm_migrate *m, int num_migrate, |
| 2070 | struct xfrm_kmaddress *k) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2071 | { |
| 2072 | return -ENOPROTOOPT; |
| 2073 | } |
| 2074 | #endif |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2075 | |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2076 | #define XMSGSIZE(type) sizeof(struct type) |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2077 | |
| 2078 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { |
David S. Miller | 66f9a25 | 2009-01-20 09:49:51 -0800 | [diff] [blame] | 2079 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2080 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
| 2081 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
| 2082 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
| 2083 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
| 2084 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
| 2085 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2086 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2087 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2088 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
David S. Miller | 66f9a25 | 2009-01-20 09:49:51 -0800 | [diff] [blame] | 2089 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2090 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2091 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2092 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2093 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
| 2094 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2095 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2096 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2097 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
| 2098 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | }; |
| 2100 | |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2101 | #undef XMSGSIZE |
| 2102 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2103 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
jamal | c28e930 | 2010-02-09 03:59:38 +0000 | [diff] [blame] | 2104 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
| 2105 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, |
| 2106 | [XFRMA_LASTUSED] = { .type = NLA_U64}, |
| 2107 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 2108 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2109 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
| 2110 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, |
| 2111 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, |
| 2112 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, |
| 2113 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, |
| 2114 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, |
| 2115 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, |
| 2116 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, |
| 2117 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, |
| 2118 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, |
| 2119 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, |
| 2120 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, |
| 2121 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, |
| 2122 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2123 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2124 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2125 | }; |
| 2126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | static struct xfrm_link { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2128 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2130 | int (*done)(struct netlink_callback *); |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2131 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
| 2132 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, |
| 2133 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, |
| 2134 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2135 | .dump = xfrm_dump_sa, |
| 2136 | .done = xfrm_dump_sa_done }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2137 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
| 2138 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, |
| 2139 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2140 | .dump = xfrm_dump_policy, |
| 2141 | .done = xfrm_dump_policy_done }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2142 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2143 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2144 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2145 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
| 2146 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2147 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2148 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
| 2149 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2150 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
| 2151 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2152 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
Jamal Hadi Salim | 566ec03 | 2007-04-26 14:12:15 -0700 | [diff] [blame] | 2153 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 2154 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | }; |
| 2156 | |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2157 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2159 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2160 | struct nlattr *attrs[XFRMA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | struct xfrm_link *link; |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2162 | int type, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | type = nlh->nlmsg_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | if (type > XFRM_MSG_MAX) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2166 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | |
| 2168 | type -= XFRM_MSG_BASE; |
| 2169 | link = &xfrm_dispatch[type]; |
| 2170 | |
| 2171 | /* All operations require privileges, even GET */ |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2172 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
| 2173 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2175 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
| 2176 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && |
| 2177 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | if (link->dump == NULL) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2179 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2181 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | } |
| 2183 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2184 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2185 | xfrma_policy); |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2186 | if (err < 0) |
| 2187 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | |
| 2189 | if (link->doit == NULL) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2190 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2192 | return link->doit(skb, nlh, attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | } |
| 2194 | |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 2195 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | { |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 2197 | mutex_lock(&xfrm_cfg_mutex); |
| 2198 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
| 2199 | mutex_unlock(&xfrm_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | } |
| 2201 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2202 | static inline size_t xfrm_expire_msgsize(void) |
| 2203 | { |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2204 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
| 2205 | + nla_total_size(sizeof(struct xfrm_mark)); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2206 | } |
| 2207 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2208 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | { |
| 2210 | struct xfrm_user_expire *ue; |
| 2211 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2213 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
| 2214 | if (nlh == NULL) |
| 2215 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2217 | ue = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | copy_to_user_state(x, &ue->state); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2219 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2221 | if (xfrm_mark_put(skb, &x->mark)) |
| 2222 | goto nla_put_failure; |
| 2223 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2224 | return nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2225 | |
| 2226 | nla_put_failure: |
| 2227 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | } |
| 2229 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2230 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2232 | struct net *net = xs_net(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | struct sk_buff *skb; |
| 2234 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2235 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | if (skb == NULL) |
| 2237 | return -ENOMEM; |
| 2238 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2239 | if (build_expire(skb, x, c) < 0) { |
| 2240 | kfree_skb(skb); |
| 2241 | return -EMSGSIZE; |
| 2242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2244 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | } |
| 2246 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2247 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
| 2248 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2249 | struct net *net = xs_net(x); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2250 | struct sk_buff *skb; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2251 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2252 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2253 | if (skb == NULL) |
| 2254 | return -ENOMEM; |
| 2255 | |
| 2256 | if (build_aevent(skb, x, c) < 0) |
| 2257 | BUG(); |
| 2258 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2259 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2260 | } |
| 2261 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2262 | static int xfrm_notify_sa_flush(struct km_event *c) |
| 2263 | { |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 2264 | struct net *net = c->net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2265 | struct xfrm_usersa_flush *p; |
| 2266 | struct nlmsghdr *nlh; |
| 2267 | struct sk_buff *skb; |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2268 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2269 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2270 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2271 | if (skb == NULL) |
| 2272 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2273 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2274 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
| 2275 | if (nlh == NULL) { |
| 2276 | kfree_skb(skb); |
| 2277 | return -EMSGSIZE; |
| 2278 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2279 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2280 | p = nlmsg_data(nlh); |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 2281 | p->proto = c->data.proto; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2282 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2283 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2284 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2285 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2286 | } |
| 2287 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2288 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2289 | { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2290 | size_t l = 0; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 2291 | if (x->aead) |
| 2292 | l += nla_total_size(aead_len(x->aead)); |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 2293 | if (x->aalg) { |
| 2294 | l += nla_total_size(sizeof(struct xfrm_algo) + |
| 2295 | (x->aalg->alg_key_len + 7) / 8); |
| 2296 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); |
| 2297 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2298 | if (x->ealg) |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 2299 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2300 | if (x->calg) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2301 | l += nla_total_size(sizeof(*x->calg)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2302 | if (x->encap) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2303 | l += nla_total_size(sizeof(*x->encap)); |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 2304 | if (x->security) |
| 2305 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + |
| 2306 | x->security->ctx_len); |
| 2307 | if (x->coaddr) |
| 2308 | l += nla_total_size(sizeof(*x->coaddr)); |
| 2309 | |
Herbert Xu | d26f398 | 2007-11-13 21:47:08 -0800 | [diff] [blame] | 2310 | /* Must count x->lastused as it may become non-zero behind our back. */ |
| 2311 | l += nla_total_size(sizeof(u64)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2312 | |
| 2313 | return l; |
| 2314 | } |
| 2315 | |
| 2316 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) |
| 2317 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2318 | struct net *net = xs_net(x); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2319 | struct xfrm_usersa_info *p; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2320 | struct xfrm_usersa_id *id; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2321 | struct nlmsghdr *nlh; |
| 2322 | struct sk_buff *skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2323 | int len = xfrm_sa_len(x); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2324 | int headlen; |
| 2325 | |
| 2326 | headlen = sizeof(*p); |
| 2327 | if (c->event == XFRM_MSG_DELSA) { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2328 | len += nla_total_size(headlen); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2329 | headlen = sizeof(*id); |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2330 | len += nla_total_size(sizeof(struct xfrm_mark)); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2331 | } |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2332 | len += NLMSG_ALIGN(headlen); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2333 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2334 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2335 | if (skb == NULL) |
| 2336 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2337 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2338 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
| 2339 | if (nlh == NULL) |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2340 | goto nla_put_failure; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2341 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2342 | p = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2343 | if (c->event == XFRM_MSG_DELSA) { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2344 | struct nlattr *attr; |
| 2345 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2346 | id = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2347 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
| 2348 | id->spi = x->id.spi; |
| 2349 | id->family = x->props.family; |
| 2350 | id->proto = x->id.proto; |
| 2351 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2352 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
| 2353 | if (attr == NULL) |
| 2354 | goto nla_put_failure; |
| 2355 | |
| 2356 | p = nla_data(attr); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2357 | } |
| 2358 | |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 2359 | if (copy_to_user_state_extra(x, p, skb)) |
| 2360 | goto nla_put_failure; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2361 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2362 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2363 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2364 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2365 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2366 | nla_put_failure: |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 2367 | /* Somebody screwed up with xfrm_sa_len! */ |
| 2368 | WARN_ON(1); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2369 | kfree_skb(skb); |
| 2370 | return -1; |
| 2371 | } |
| 2372 | |
| 2373 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) |
| 2374 | { |
| 2375 | |
| 2376 | switch (c->event) { |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2377 | case XFRM_MSG_EXPIRE: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2378 | return xfrm_exp_state_notify(x, c); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2379 | case XFRM_MSG_NEWAE: |
| 2380 | return xfrm_aevent_state_notify(x, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2381 | case XFRM_MSG_DELSA: |
| 2382 | case XFRM_MSG_UPDSA: |
| 2383 | case XFRM_MSG_NEWSA: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2384 | return xfrm_notify_sa(x, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2385 | case XFRM_MSG_FLUSHSA: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2386 | return xfrm_notify_sa_flush(c); |
| 2387 | default: |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 2388 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
| 2389 | c->event); |
| 2390 | break; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2391 | } |
| 2392 | |
| 2393 | return 0; |
| 2394 | |
| 2395 | } |
| 2396 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2397 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
| 2398 | struct xfrm_policy *xp) |
| 2399 | { |
| 2400 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) |
| 2401 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2402 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2403 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
| 2404 | + userpolicy_type_attrsize(); |
| 2405 | } |
| 2406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
| 2408 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, |
| 2409 | int dir) |
| 2410 | { |
| 2411 | struct xfrm_user_acquire *ua; |
| 2412 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | __u32 seq = xfrm_get_acqseq(); |
| 2414 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2415 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
| 2416 | if (nlh == NULL) |
| 2417 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2419 | ua = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
| 2421 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); |
| 2422 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); |
| 2423 | copy_to_user_policy(xp, &ua->policy, dir); |
| 2424 | ua->aalgos = xt->aalgos; |
| 2425 | ua->ealgos = xt->ealgos; |
| 2426 | ua->calgos = xt->calgos; |
| 2427 | ua->seq = x->km.seq = seq; |
| 2428 | |
| 2429 | if (copy_to_user_tmpl(xp, skb) < 0) |
| 2430 | goto nlmsg_failure; |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 2431 | if (copy_to_user_state_sec_ctx(x, skb)) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 2432 | goto nlmsg_failure; |
Jamal Hadi Salim | 1459bb3 | 2006-11-20 16:51:22 -0800 | [diff] [blame] | 2433 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2434 | goto nlmsg_failure; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2435 | if (xfrm_mark_put(skb, &xp->mark)) |
| 2436 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2437 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2438 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2440 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | nlmsg_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2442 | nlmsg_cancel(skb, nlh); |
| 2443 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | } |
| 2445 | |
| 2446 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, |
| 2447 | struct xfrm_policy *xp, int dir) |
| 2448 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2449 | struct net *net = xs_net(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2450 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2452 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | if (skb == NULL) |
| 2454 | return -ENOMEM; |
| 2455 | |
| 2456 | if (build_acquire(skb, x, xt, xp, dir) < 0) |
| 2457 | BUG(); |
| 2458 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2459 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | } |
| 2461 | |
| 2462 | /* User gives us xfrm_user_policy_info followed by an array of 0 |
| 2463 | * or more templates. |
| 2464 | */ |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 2465 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | u8 *data, int len, int *dir) |
| 2467 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2468 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
| 2470 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); |
| 2471 | struct xfrm_policy *xp; |
| 2472 | int nr; |
| 2473 | |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 2474 | switch (sk->sk_family) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | case AF_INET: |
| 2476 | if (opt != IP_XFRM_POLICY) { |
| 2477 | *dir = -EOPNOTSUPP; |
| 2478 | return NULL; |
| 2479 | } |
| 2480 | break; |
| 2481 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 2482 | case AF_INET6: |
| 2483 | if (opt != IPV6_XFRM_POLICY) { |
| 2484 | *dir = -EOPNOTSUPP; |
| 2485 | return NULL; |
| 2486 | } |
| 2487 | break; |
| 2488 | #endif |
| 2489 | default: |
| 2490 | *dir = -EINVAL; |
| 2491 | return NULL; |
| 2492 | } |
| 2493 | |
| 2494 | *dir = -EINVAL; |
| 2495 | |
| 2496 | if (len < sizeof(*p) || |
| 2497 | verify_newpolicy_info(p)) |
| 2498 | return NULL; |
| 2499 | |
| 2500 | nr = ((len - sizeof(*p)) / sizeof(*ut)); |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 2501 | if (validate_tmpl(nr, ut, p->sel.family)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | return NULL; |
| 2503 | |
Herbert Xu | a4f1bac | 2005-07-26 15:43:17 -0700 | [diff] [blame] | 2504 | if (p->dir > XFRM_POLICY_OUT) |
| 2505 | return NULL; |
| 2506 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2507 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | if (xp == NULL) { |
| 2509 | *dir = -ENOBUFS; |
| 2510 | return NULL; |
| 2511 | } |
| 2512 | |
| 2513 | copy_from_user_policy(xp, p); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2514 | xp->type = XFRM_POLICY_TYPE_MAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | copy_templates(xp, ut, nr); |
| 2516 | |
| 2517 | *dir = p->dir; |
| 2518 | |
| 2519 | return xp; |
| 2520 | } |
| 2521 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2522 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
| 2523 | { |
| 2524 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) |
| 2525 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) |
| 2526 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2527 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2528 | + userpolicy_type_attrsize(); |
| 2529 | } |
| 2530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2532 | int dir, struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | { |
| 2534 | struct xfrm_user_polexpire *upe; |
| 2535 | struct nlmsghdr *nlh; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2536 | int hard = c->data.hard; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2538 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
| 2539 | if (nlh == NULL) |
| 2540 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2542 | upe = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | copy_to_user_policy(xp, &upe->pol, dir); |
| 2544 | if (copy_to_user_tmpl(xp, skb) < 0) |
| 2545 | goto nlmsg_failure; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 2546 | if (copy_to_user_sec_ctx(xp, skb)) |
| 2547 | goto nlmsg_failure; |
Jamal Hadi Salim | 1459bb3 | 2006-11-20 16:51:22 -0800 | [diff] [blame] | 2548 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2549 | goto nlmsg_failure; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2550 | if (xfrm_mark_put(skb, &xp->mark)) |
| 2551 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | upe->hard = !!hard; |
| 2553 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2554 | return nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2556 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | nlmsg_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2558 | nlmsg_cancel(skb, nlh); |
| 2559 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | } |
| 2561 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2562 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2564 | struct net *net = xp_net(xp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2567 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | if (skb == NULL) |
| 2569 | return -ENOMEM; |
| 2570 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2571 | if (build_polexpire(skb, xp, dir, c) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | BUG(); |
| 2573 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2574 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | } |
| 2576 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2577 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
| 2578 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2579 | struct net *net = xp_net(xp); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2580 | struct xfrm_userpolicy_info *p; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2581 | struct xfrm_userpolicy_id *id; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2582 | struct nlmsghdr *nlh; |
| 2583 | struct sk_buff *skb; |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2584 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2585 | int headlen; |
| 2586 | |
| 2587 | headlen = sizeof(*p); |
| 2588 | if (c->event == XFRM_MSG_DELPOLICY) { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2589 | len += nla_total_size(headlen); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2590 | headlen = sizeof(*id); |
| 2591 | } |
Thomas Graf | cfbfd45 | 2007-08-22 13:57:04 -0700 | [diff] [blame] | 2592 | len += userpolicy_type_attrsize(); |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2593 | len += nla_total_size(sizeof(struct xfrm_mark)); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2594 | len += NLMSG_ALIGN(headlen); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2595 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2596 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2597 | if (skb == NULL) |
| 2598 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2599 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2600 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
| 2601 | if (nlh == NULL) |
| 2602 | goto nlmsg_failure; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2603 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2604 | p = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2605 | if (c->event == XFRM_MSG_DELPOLICY) { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2606 | struct nlattr *attr; |
| 2607 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2608 | id = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2609 | memset(id, 0, sizeof(*id)); |
| 2610 | id->dir = dir; |
| 2611 | if (c->data.byid) |
| 2612 | id->index = xp->index; |
| 2613 | else |
| 2614 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); |
| 2615 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2616 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
| 2617 | if (attr == NULL) |
| 2618 | goto nlmsg_failure; |
| 2619 | |
| 2620 | p = nla_data(attr); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2621 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2622 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2623 | copy_to_user_policy(xp, p, dir); |
| 2624 | if (copy_to_user_tmpl(xp, skb) < 0) |
| 2625 | goto nlmsg_failure; |
Jamal Hadi Salim | 1459bb3 | 2006-11-20 16:51:22 -0800 | [diff] [blame] | 2626 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2627 | goto nlmsg_failure; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2628 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2629 | if (xfrm_mark_put(skb, &xp->mark)) |
| 2630 | goto nla_put_failure; |
| 2631 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2632 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2633 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2634 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2635 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2636 | nla_put_failure: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2637 | nlmsg_failure: |
| 2638 | kfree_skb(skb); |
| 2639 | return -1; |
| 2640 | } |
| 2641 | |
| 2642 | static int xfrm_notify_policy_flush(struct km_event *c) |
| 2643 | { |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 2644 | struct net *net = c->net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2645 | struct nlmsghdr *nlh; |
| 2646 | struct sk_buff *skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2647 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2648 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2649 | if (skb == NULL) |
| 2650 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2651 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2652 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
| 2653 | if (nlh == NULL) |
| 2654 | goto nlmsg_failure; |
Jamal Hadi Salim | 0c51f53 | 2006-11-27 12:58:20 -0800 | [diff] [blame] | 2655 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
| 2656 | goto nlmsg_failure; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2657 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2658 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2659 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2660 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2661 | |
| 2662 | nlmsg_failure: |
| 2663 | kfree_skb(skb); |
| 2664 | return -1; |
| 2665 | } |
| 2666 | |
| 2667 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
| 2668 | { |
| 2669 | |
| 2670 | switch (c->event) { |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2671 | case XFRM_MSG_NEWPOLICY: |
| 2672 | case XFRM_MSG_UPDPOLICY: |
| 2673 | case XFRM_MSG_DELPOLICY: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2674 | return xfrm_notify_policy(xp, dir, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2675 | case XFRM_MSG_FLUSHPOLICY: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2676 | return xfrm_notify_policy_flush(c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2677 | case XFRM_MSG_POLEXPIRE: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2678 | return xfrm_exp_policy_notify(xp, dir, c); |
| 2679 | default: |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 2680 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
| 2681 | c->event); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2682 | } |
| 2683 | |
| 2684 | return 0; |
| 2685 | |
| 2686 | } |
| 2687 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2688 | static inline size_t xfrm_report_msgsize(void) |
| 2689 | { |
| 2690 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); |
| 2691 | } |
| 2692 | |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2693 | static int build_report(struct sk_buff *skb, u8 proto, |
| 2694 | struct xfrm_selector *sel, xfrm_address_t *addr) |
| 2695 | { |
| 2696 | struct xfrm_user_report *ur; |
| 2697 | struct nlmsghdr *nlh; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2698 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2699 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
| 2700 | if (nlh == NULL) |
| 2701 | return -EMSGSIZE; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2702 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2703 | ur = nlmsg_data(nlh); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2704 | ur->proto = proto; |
| 2705 | memcpy(&ur->sel, sel, sizeof(ur->sel)); |
| 2706 | |
| 2707 | if (addr) |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2708 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2709 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2710 | return nlmsg_end(skb, nlh); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2711 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2712 | nla_put_failure: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2713 | nlmsg_cancel(skb, nlh); |
| 2714 | return -EMSGSIZE; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2715 | } |
| 2716 | |
Alexey Dobriyan | db983c1 | 2008-11-25 17:51:01 -0800 | [diff] [blame] | 2717 | static int xfrm_send_report(struct net *net, u8 proto, |
| 2718 | struct xfrm_selector *sel, xfrm_address_t *addr) |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2719 | { |
| 2720 | struct sk_buff *skb; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2721 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2722 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2723 | if (skb == NULL) |
| 2724 | return -ENOMEM; |
| 2725 | |
| 2726 | if (build_report(skb, proto, sel, addr) < 0) |
| 2727 | BUG(); |
| 2728 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2729 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2730 | } |
| 2731 | |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 2732 | static inline size_t xfrm_mapping_msgsize(void) |
| 2733 | { |
| 2734 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); |
| 2735 | } |
| 2736 | |
| 2737 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, |
| 2738 | xfrm_address_t *new_saddr, __be16 new_sport) |
| 2739 | { |
| 2740 | struct xfrm_user_mapping *um; |
| 2741 | struct nlmsghdr *nlh; |
| 2742 | |
| 2743 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); |
| 2744 | if (nlh == NULL) |
| 2745 | return -EMSGSIZE; |
| 2746 | |
| 2747 | um = nlmsg_data(nlh); |
| 2748 | |
| 2749 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); |
| 2750 | um->id.spi = x->id.spi; |
| 2751 | um->id.family = x->props.family; |
| 2752 | um->id.proto = x->id.proto; |
| 2753 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); |
| 2754 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); |
| 2755 | um->new_sport = new_sport; |
| 2756 | um->old_sport = x->encap->encap_sport; |
| 2757 | um->reqid = x->props.reqid; |
| 2758 | |
| 2759 | return nlmsg_end(skb, nlh); |
| 2760 | } |
| 2761 | |
| 2762 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, |
| 2763 | __be16 sport) |
| 2764 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2765 | struct net *net = xs_net(x); |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 2766 | struct sk_buff *skb; |
| 2767 | |
| 2768 | if (x->id.proto != IPPROTO_ESP) |
| 2769 | return -EINVAL; |
| 2770 | |
| 2771 | if (!x->encap) |
| 2772 | return -EINVAL; |
| 2773 | |
| 2774 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); |
| 2775 | if (skb == NULL) |
| 2776 | return -ENOMEM; |
| 2777 | |
| 2778 | if (build_mapping(skb, x, ipaddr, sport) < 0) |
| 2779 | BUG(); |
| 2780 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2781 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 2782 | } |
| 2783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | static struct xfrm_mgr netlink_mgr = { |
| 2785 | .id = "netlink", |
| 2786 | .notify = xfrm_send_state_notify, |
| 2787 | .acquire = xfrm_send_acquire, |
| 2788 | .compile_policy = xfrm_compile_policy, |
| 2789 | .notify_policy = xfrm_send_policy_notify, |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2790 | .report = xfrm_send_report, |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2791 | .migrate = xfrm_send_migrate, |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 2792 | .new_mapping = xfrm_send_mapping, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | }; |
| 2794 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2795 | static int __net_init xfrm_user_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | { |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 2797 | struct sock *nlsk; |
| 2798 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2799 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
Patrick McHardy | af65bdf | 2007-04-20 14:14:21 -0700 | [diff] [blame] | 2800 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 2801 | if (nlsk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | return -ENOMEM; |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 2803 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2804 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2805 | return 0; |
| 2806 | } |
| 2807 | |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 2808 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2809 | { |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 2810 | struct net *net; |
| 2811 | list_for_each_entry(net, net_exit_list, exit_list) |
| 2812 | rcu_assign_pointer(net->xfrm.nlsk, NULL); |
| 2813 | synchronize_net(); |
| 2814 | list_for_each_entry(net, net_exit_list, exit_list) |
| 2815 | netlink_kernel_release(net->xfrm.nlsk_stash); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2816 | } |
| 2817 | |
| 2818 | static struct pernet_operations xfrm_user_net_ops = { |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 2819 | .init = xfrm_user_net_init, |
| 2820 | .exit_batch = xfrm_user_net_exit, |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2821 | }; |
| 2822 | |
| 2823 | static int __init xfrm_user_init(void) |
| 2824 | { |
| 2825 | int rv; |
| 2826 | |
| 2827 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
| 2828 | |
| 2829 | rv = register_pernet_subsys(&xfrm_user_net_ops); |
| 2830 | if (rv < 0) |
| 2831 | return rv; |
| 2832 | rv = xfrm_register_km(&netlink_mgr); |
| 2833 | if (rv < 0) |
| 2834 | unregister_pernet_subsys(&xfrm_user_net_ops); |
| 2835 | return rv; |
| 2836 | } |
| 2837 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | static void __exit xfrm_user_exit(void) |
| 2839 | { |
| 2840 | xfrm_unregister_km(&netlink_mgr); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2841 | unregister_pernet_subsys(&xfrm_user_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | } |
| 2843 | |
| 2844 | module_init(xfrm_user_init); |
| 2845 | module_exit(xfrm_user_exit); |
| 2846 | MODULE_LICENSE("GPL"); |
Harald Welte | 4fdb3bb | 2005-08-09 19:40:55 -0700 | [diff] [blame] | 2847 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 2848 | |