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