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> |
Nicolas Dichtel | fa6dd8a | 2011-01-11 08:04:12 +0000 | [diff] [blame] | 29 | #include <net/ah.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/uaccess.h> |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 31 | #if IS_ENABLED(CONFIG_IPV6) |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 32 | #include <linux/in6.h> |
| 33 | #endif |
Sowmini Varadhan | e33d4f1 | 2015-10-21 11:48:25 -0400 | [diff] [blame] | 34 | #include <asm/unaligned.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 36 | 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] | 37 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 38 | struct nlattr *rt = attrs[type]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | struct xfrm_algo *algp; |
| 40 | |
| 41 | if (!rt) |
| 42 | return 0; |
| 43 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 44 | algp = nla_data(rt); |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 45 | if (nla_len(rt) < xfrm_alg_len(algp)) |
Herbert Xu | 31c2685 | 2005-05-19 12:39:49 -0700 | [diff] [blame] | 46 | return -EINVAL; |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | switch (type) { |
| 49 | case XFRMA_ALG_AUTH: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | case XFRMA_ALG_CRYPT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | case XFRMA_ALG_COMP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | break; |
| 53 | |
| 54 | default: |
| 55 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 56 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 59 | return 0; |
| 60 | } |
| 61 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 62 | static int verify_auth_trunc(struct nlattr **attrs) |
| 63 | { |
| 64 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; |
| 65 | struct xfrm_algo_auth *algp; |
| 66 | |
| 67 | if (!rt) |
| 68 | return 0; |
| 69 | |
| 70 | algp = nla_data(rt); |
| 71 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) |
| 72 | return -EINVAL; |
| 73 | |
| 74 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 75 | return 0; |
| 76 | } |
| 77 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 78 | static int verify_aead(struct nlattr **attrs) |
| 79 | { |
| 80 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; |
| 81 | struct xfrm_algo_aead *algp; |
| 82 | |
| 83 | if (!rt) |
| 84 | return 0; |
| 85 | |
| 86 | algp = nla_data(rt); |
| 87 | if (nla_len(rt) < aead_len(algp)) |
| 88 | return -EINVAL; |
| 89 | |
| 90 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; |
| 91 | return 0; |
| 92 | } |
| 93 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 94 | 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] | 95 | xfrm_address_t **addrp) |
| 96 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 97 | struct nlattr *rt = attrs[type]; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 98 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 99 | if (rt && addrp) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 100 | *addrp = nla_data(rt); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 101 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 102 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 103 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 104 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 105 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 106 | struct xfrm_user_sec_ctx *uctx; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 107 | |
| 108 | if (!rt) |
| 109 | return 0; |
| 110 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 111 | uctx = nla_data(rt); |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 112 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 113 | return -EINVAL; |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 118 | static inline int verify_replay(struct xfrm_usersa_info *p, |
| 119 | struct nlattr **attrs) |
| 120 | { |
| 121 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 122 | struct xfrm_replay_state_esn *rs; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 123 | |
| 124 | if (!rt) |
Florian Westphal | 0355a9f | 2018-02-12 14:42:01 +0100 | [diff] [blame] | 125 | return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0; |
| 126 | |
| 127 | rs = nla_data(rt); |
| 128 | |
| 129 | if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) |
| 130 | return -EINVAL; |
| 131 | |
| 132 | if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && |
| 133 | nla_len(rt) != sizeof(*rs)) |
| 134 | return -EINVAL; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 135 | |
Fan Du | 0171410 | 2014-01-18 09:54:28 +0800 | [diff] [blame] | 136 | /* As only ESP and AH support ESN feature. */ |
| 137 | if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) |
Steffen Klassert | 02aadf7 | 2011-03-28 19:48:09 +0000 | [diff] [blame] | 138 | return -EINVAL; |
| 139 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 140 | if (p->replay_window != 0) |
| 141 | return -EINVAL; |
| 142 | |
| 143 | return 0; |
| 144 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 147 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | int err; |
| 150 | |
| 151 | err = -EINVAL; |
| 152 | switch (p->family) { |
| 153 | case AF_INET: |
Anirudh Gupta | 92a63c2 | 2019-05-21 20:59:47 +0530 | [diff] [blame] | 154 | break; |
| 155 | |
| 156 | case AF_INET6: |
| 157 | #if IS_ENABLED(CONFIG_IPV6) |
| 158 | break; |
| 159 | #else |
| 160 | err = -EAFNOSUPPORT; |
| 161 | goto out; |
| 162 | #endif |
| 163 | |
| 164 | default: |
| 165 | goto out; |
| 166 | } |
| 167 | |
| 168 | switch (p->sel.family) { |
Nicolas Dichtel | 2d0dbd0 | 2019-06-14 11:13:55 +0200 | [diff] [blame] | 169 | case AF_UNSPEC: |
| 170 | break; |
| 171 | |
Anirudh Gupta | 92a63c2 | 2019-05-21 20:59:47 +0530 | [diff] [blame] | 172 | case AF_INET: |
Steffen Klassert | 89cb86e | 2018-08-01 13:45:11 +0200 | [diff] [blame] | 173 | if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) |
| 174 | goto out; |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | break; |
| 177 | |
| 178 | case AF_INET6: |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 179 | #if IS_ENABLED(CONFIG_IPV6) |
Steffen Klassert | 89cb86e | 2018-08-01 13:45:11 +0200 | [diff] [blame] | 180 | if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) |
| 181 | goto out; |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | break; |
| 184 | #else |
| 185 | err = -EAFNOSUPPORT; |
| 186 | goto out; |
| 187 | #endif |
| 188 | |
| 189 | default: |
| 190 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 191 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | err = -EINVAL; |
| 194 | switch (p->id.proto) { |
| 195 | case IPPROTO_AH: |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 196 | if ((!attrs[XFRMA_ALG_AUTH] && |
| 197 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 198 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 199 | attrs[XFRMA_ALG_CRYPT] || |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 200 | attrs[XFRMA_ALG_COMP] || |
Tobias Brunner | a0e5ef5 | 2014-06-26 15:12:45 +0200 | [diff] [blame] | 201 | attrs[XFRMA_TFCPAD]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | goto out; |
| 203 | break; |
| 204 | |
| 205 | case IPPROTO_ESP: |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 206 | if (attrs[XFRMA_ALG_COMP]) |
| 207 | goto out; |
| 208 | if (!attrs[XFRMA_ALG_AUTH] && |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 209 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 210 | !attrs[XFRMA_ALG_CRYPT] && |
| 211 | !attrs[XFRMA_ALG_AEAD]) |
| 212 | goto out; |
| 213 | if ((attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 214 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 215 | attrs[XFRMA_ALG_CRYPT]) && |
| 216 | attrs[XFRMA_ALG_AEAD]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | goto out; |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 218 | if (attrs[XFRMA_TFCPAD] && |
| 219 | p->mode != XFRM_MODE_TUNNEL) |
| 220 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | break; |
| 222 | |
| 223 | case IPPROTO_COMP: |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 224 | if (!attrs[XFRMA_ALG_COMP] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 225 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 226 | attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 227 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 228 | attrs[XFRMA_ALG_CRYPT] || |
Tobias Brunner | a0e5ef5 | 2014-06-26 15:12:45 +0200 | [diff] [blame] | 229 | attrs[XFRMA_TFCPAD] || |
| 230 | (ntohl(p->id.spi) >= 0x10000)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | goto out; |
| 232 | break; |
| 233 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 234 | #if IS_ENABLED(CONFIG_IPV6) |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 235 | case IPPROTO_DSTOPTS: |
| 236 | case IPPROTO_ROUTING: |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 237 | if (attrs[XFRMA_ALG_COMP] || |
| 238 | attrs[XFRMA_ALG_AUTH] || |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 239 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 240 | attrs[XFRMA_ALG_AEAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 241 | attrs[XFRMA_ALG_CRYPT] || |
| 242 | attrs[XFRMA_ENCAP] || |
| 243 | attrs[XFRMA_SEC_CTX] || |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 244 | attrs[XFRMA_TFCPAD] || |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 245 | !attrs[XFRMA_COADDR]) |
Masahide NAKAMURA | e23c719 | 2006-08-23 20:33:28 -0700 | [diff] [blame] | 246 | goto out; |
| 247 | break; |
| 248 | #endif |
| 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | default: |
| 251 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 254 | if ((err = verify_aead(attrs))) |
| 255 | goto out; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 256 | if ((err = verify_auth_trunc(attrs))) |
| 257 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 258 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 260 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 262 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | goto out; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 264 | if ((err = verify_sec_ctx_len(attrs))) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 265 | goto out; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 266 | if ((err = verify_replay(p, attrs))) |
| 267 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
| 269 | err = -EINVAL; |
| 270 | switch (p->mode) { |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 271 | case XFRM_MODE_TRANSPORT: |
| 272 | case XFRM_MODE_TUNNEL: |
Noriaki TAKAMIYA | 060f02a | 2006-08-23 18:18:55 -0700 | [diff] [blame] | 273 | case XFRM_MODE_ROUTEOPTIMIZATION: |
Diego Beltrami | 0a69452 | 2006-10-03 23:47:05 -0700 | [diff] [blame] | 274 | case XFRM_MODE_BEET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | break; |
| 276 | |
| 277 | default: |
| 278 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 279 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | err = 0; |
| 282 | |
| 283 | out: |
| 284 | return err; |
| 285 | } |
| 286 | |
| 287 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, |
David S. Miller | 6f2f19e | 2011-02-27 23:04:45 -0800 | [diff] [blame] | 288 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 289 | struct nlattr *rta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | struct xfrm_algo *p, *ualg; |
| 292 | struct xfrm_algo_desc *algo; |
| 293 | |
| 294 | if (!rta) |
| 295 | return 0; |
| 296 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 297 | ualg = nla_data(rta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
| 299 | algo = get_byname(ualg->alg_name, 1); |
| 300 | if (!algo) |
| 301 | return -ENOSYS; |
| 302 | *props = algo->desc.sadb_alg_id; |
| 303 | |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 304 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (!p) |
| 306 | return -ENOMEM; |
| 307 | |
Herbert Xu | 04ff126 | 2006-08-13 08:50:00 +1000 | [diff] [blame] | 308 | strcpy(p->alg_name, algo->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | *algpp = p; |
| 310 | return 0; |
| 311 | } |
| 312 | |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 313 | static int attach_crypt(struct xfrm_state *x, struct nlattr *rta) |
| 314 | { |
| 315 | struct xfrm_algo *p, *ualg; |
| 316 | struct xfrm_algo_desc *algo; |
| 317 | |
| 318 | if (!rta) |
| 319 | return 0; |
| 320 | |
| 321 | ualg = nla_data(rta); |
| 322 | |
| 323 | algo = xfrm_ealg_get_byname(ualg->alg_name, 1); |
| 324 | if (!algo) |
| 325 | return -ENOSYS; |
| 326 | x->props.ealgo = algo->desc.sadb_alg_id; |
| 327 | |
| 328 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
| 329 | if (!p) |
| 330 | return -ENOMEM; |
| 331 | |
| 332 | strcpy(p->alg_name, algo->name); |
| 333 | x->ealg = p; |
| 334 | x->geniv = algo->uinfo.encr.geniv; |
| 335 | return 0; |
| 336 | } |
| 337 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 338 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
| 339 | struct nlattr *rta) |
| 340 | { |
| 341 | struct xfrm_algo *ualg; |
| 342 | struct xfrm_algo_auth *p; |
| 343 | struct xfrm_algo_desc *algo; |
| 344 | |
| 345 | if (!rta) |
| 346 | return 0; |
| 347 | |
| 348 | ualg = nla_data(rta); |
| 349 | |
| 350 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); |
| 351 | if (!algo) |
| 352 | return -ENOSYS; |
| 353 | *props = algo->desc.sadb_alg_id; |
| 354 | |
| 355 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); |
| 356 | if (!p) |
| 357 | return -ENOMEM; |
| 358 | |
| 359 | strcpy(p->alg_name, algo->name); |
| 360 | p->alg_key_len = ualg->alg_key_len; |
| 361 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; |
| 362 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); |
| 363 | |
| 364 | *algpp = p; |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, |
| 369 | struct nlattr *rta) |
| 370 | { |
| 371 | struct xfrm_algo_auth *p, *ualg; |
| 372 | struct xfrm_algo_desc *algo; |
| 373 | |
| 374 | if (!rta) |
| 375 | return 0; |
| 376 | |
| 377 | ualg = nla_data(rta); |
| 378 | |
| 379 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); |
| 380 | if (!algo) |
| 381 | return -ENOSYS; |
Herbert Xu | 689f1c9 | 2014-09-18 16:38:18 +0800 | [diff] [blame] | 382 | if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 383 | return -EINVAL; |
| 384 | *props = algo->desc.sadb_alg_id; |
| 385 | |
| 386 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); |
| 387 | if (!p) |
| 388 | return -ENOMEM; |
| 389 | |
| 390 | strcpy(p->alg_name, algo->name); |
| 391 | if (!p->alg_trunc_len) |
| 392 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; |
| 393 | |
| 394 | *algpp = p; |
| 395 | return 0; |
| 396 | } |
| 397 | |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 398 | static int attach_aead(struct xfrm_state *x, struct nlattr *rta) |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 399 | { |
| 400 | struct xfrm_algo_aead *p, *ualg; |
| 401 | struct xfrm_algo_desc *algo; |
| 402 | |
| 403 | if (!rta) |
| 404 | return 0; |
| 405 | |
| 406 | ualg = nla_data(rta); |
| 407 | |
| 408 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); |
| 409 | if (!algo) |
| 410 | return -ENOSYS; |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 411 | x->props.ealgo = algo->desc.sadb_alg_id; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 412 | |
| 413 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); |
| 414 | if (!p) |
| 415 | return -ENOMEM; |
| 416 | |
| 417 | strcpy(p->alg_name, algo->name); |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 418 | x->aead = p; |
| 419 | x->geniv = algo->uinfo.aead.geniv; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 420 | return 0; |
| 421 | } |
| 422 | |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 423 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
| 424 | struct nlattr *rp) |
| 425 | { |
| 426 | struct xfrm_replay_state_esn *up; |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 427 | int ulen; |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 428 | |
| 429 | if (!replay_esn || !rp) |
| 430 | return 0; |
| 431 | |
| 432 | up = nla_data(rp); |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 433 | ulen = xfrm_replay_state_esn_len(up); |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 434 | |
Andy Whitcroft | 79191ea | 2017-03-23 07:45:44 +0000 | [diff] [blame] | 435 | /* Check the overall length and the internal bitmap length to avoid |
| 436 | * potential overflow. */ |
| 437 | if (nla_len(rp) < ulen || |
| 438 | xfrm_replay_state_esn_len(replay_esn) != ulen || |
| 439 | replay_esn->bmp_len != up->bmp_len) |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 440 | return -EINVAL; |
| 441 | |
Andy Whitcroft | 64a5465 | 2017-03-22 07:29:31 +0000 | [diff] [blame] | 442 | if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) |
| 443 | return -EINVAL; |
| 444 | |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 445 | return 0; |
| 446 | } |
| 447 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 448 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
| 449 | struct xfrm_replay_state_esn **preplay_esn, |
| 450 | struct nlattr *rta) |
| 451 | { |
| 452 | struct xfrm_replay_state_esn *p, *pp, *up; |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 453 | int klen, ulen; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 454 | |
| 455 | if (!rta) |
| 456 | return 0; |
| 457 | |
| 458 | up = nla_data(rta); |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 459 | klen = xfrm_replay_state_esn_len(up); |
| 460 | ulen = nla_len(rta) >= klen ? klen : sizeof(*up); |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 461 | |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 462 | p = kzalloc(klen, GFP_KERNEL); |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 463 | if (!p) |
| 464 | return -ENOMEM; |
| 465 | |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 466 | pp = kzalloc(klen, GFP_KERNEL); |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 467 | if (!pp) { |
| 468 | kfree(p); |
| 469 | return -ENOMEM; |
| 470 | } |
| 471 | |
Mathias Krause | ecd7918 | 2012-09-20 10:01:49 +0000 | [diff] [blame] | 472 | memcpy(p, up, ulen); |
| 473 | memcpy(pp, up, ulen); |
| 474 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 475 | *replay_esn = p; |
| 476 | *preplay_esn = pp; |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
Joy Latten | 661697f | 2007-04-13 16:14:35 -0700 | [diff] [blame] | 481 | 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] | 482 | { |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 483 | int len = 0; |
| 484 | |
| 485 | if (xfrm_ctx) { |
| 486 | len += sizeof(struct xfrm_user_sec_ctx); |
| 487 | len += xfrm_ctx->ctx_len; |
| 488 | } |
| 489 | return len; |
| 490 | } |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
| 493 | { |
| 494 | memcpy(&x->id, &p->id, sizeof(x->id)); |
| 495 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); |
| 496 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); |
| 497 | x->props.mode = p->mode; |
Fan Du | 33fce60 | 2013-09-17 15:14:13 +0800 | [diff] [blame] | 498 | x->props.replay_window = min_t(unsigned int, p->replay_window, |
| 499 | sizeof(x->replay.bitmap) * 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | x->props.reqid = p->reqid; |
| 501 | x->props.family = p->family; |
David S. Miller | 54489c14 | 2006-10-27 15:29:47 -0700 | [diff] [blame] | 502 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | x->props.flags = p->flags; |
Herbert Xu | 196b003 | 2007-07-31 02:04:32 -0700 | [diff] [blame] | 504 | |
Steffen Klassert | ccf9b3b | 2008-07-10 16:55:37 -0700 | [diff] [blame] | 505 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
Herbert Xu | 196b003 | 2007-07-31 02:04:32 -0700 | [diff] [blame] | 506 | x->sel.family = p->family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 509 | /* |
| 510 | * someday when pfkey also has support, we could have the code |
| 511 | * somehow made shareable and move it to xfrm_state.c - JHS |
| 512 | * |
| 513 | */ |
Mathias Krause | e3ac104 | 2012-09-19 11:33:43 +0000 | [diff] [blame] | 514 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, |
| 515 | int update_esn) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 516 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 517 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
Mathias Krause | e3ac104 | 2012-09-19 11:33:43 +0000 | [diff] [blame] | 518 | struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 519 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
| 520 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; |
| 521 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 522 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 523 | if (re) { |
| 524 | struct xfrm_replay_state_esn *replay_esn; |
| 525 | replay_esn = nla_data(re); |
| 526 | memcpy(x->replay_esn, replay_esn, |
| 527 | xfrm_replay_state_esn_len(replay_esn)); |
| 528 | memcpy(x->preplay_esn, replay_esn, |
| 529 | xfrm_replay_state_esn_len(replay_esn)); |
| 530 | } |
| 531 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 532 | if (rp) { |
| 533 | struct xfrm_replay_state *replay; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 534 | replay = nla_data(rp); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 535 | memcpy(&x->replay, replay, sizeof(*replay)); |
| 536 | memcpy(&x->preplay, replay, sizeof(*replay)); |
| 537 | } |
| 538 | |
| 539 | if (lt) { |
| 540 | struct xfrm_lifetime_cur *ltime; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 541 | ltime = nla_data(lt); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 542 | x->curlft.bytes = ltime->bytes; |
| 543 | x->curlft.packets = ltime->packets; |
| 544 | x->curlft.add_time = ltime->add_time; |
| 545 | x->curlft.use_time = ltime->use_time; |
| 546 | } |
| 547 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 548 | if (et) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 549 | x->replay_maxage = nla_get_u32(et); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 550 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 551 | if (rt) |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 552 | x->replay_maxdiff = nla_get_u32(rt); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 553 | } |
| 554 | |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 555 | static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m) |
| 556 | { |
| 557 | if (attrs[XFRMA_SET_MARK]) { |
| 558 | m->v = nla_get_u32(attrs[XFRMA_SET_MARK]); |
| 559 | if (attrs[XFRMA_SET_MARK_MASK]) |
| 560 | m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]); |
| 561 | else |
| 562 | m->m = 0xffffffff; |
| 563 | } else { |
| 564 | m->v = m->m = 0; |
| 565 | } |
| 566 | } |
| 567 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 568 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
| 569 | struct xfrm_usersa_info *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 570 | struct nlattr **attrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | int *errp) |
| 572 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 573 | struct xfrm_state *x = xfrm_state_alloc(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | int err = -ENOMEM; |
| 575 | |
| 576 | if (!x) |
| 577 | goto error_no_put; |
| 578 | |
| 579 | copy_from_user_state(x, p); |
| 580 | |
Nicolas Dichtel | a947b0a | 2013-02-22 10:54:54 +0100 | [diff] [blame] | 581 | if (attrs[XFRMA_SA_EXTRA_FLAGS]) |
| 582 | x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); |
| 583 | |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 584 | if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD]))) |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 585 | goto error; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 586 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
| 587 | attrs[XFRMA_ALG_AUTH_TRUNC]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | goto error; |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 589 | if (!x->props.aalgo) { |
| 590 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, |
| 591 | attrs[XFRMA_ALG_AUTH]))) |
| 592 | goto error; |
| 593 | } |
Herbert Xu | 69b0137 | 2015-05-27 16:03:45 +0800 | [diff] [blame] | 594 | if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | goto error; |
| 596 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, |
| 597 | xfrm_calg_get_byname, |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 598 | attrs[XFRMA_ALG_COMP]))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | goto error; |
Thomas Graf | fd21150 | 2007-09-06 03:28:08 -0700 | [diff] [blame] | 600 | |
| 601 | if (attrs[XFRMA_ENCAP]) { |
| 602 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), |
| 603 | sizeof(*x->encap), GFP_KERNEL); |
| 604 | if (x->encap == NULL) |
| 605 | goto error; |
| 606 | } |
| 607 | |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 608 | if (attrs[XFRMA_TFCPAD]) |
| 609 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); |
| 610 | |
Thomas Graf | fd21150 | 2007-09-06 03:28:08 -0700 | [diff] [blame] | 611 | if (attrs[XFRMA_COADDR]) { |
| 612 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), |
| 613 | sizeof(*x->coaddr), GFP_KERNEL); |
| 614 | if (x->coaddr == NULL) |
| 615 | goto error; |
| 616 | } |
| 617 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 618 | xfrm_mark_get(attrs, &x->mark); |
| 619 | |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 620 | xfrm_smark_init(attrs, &x->props.smark); |
Lorenzo Colitti | 34e23de | 2017-08-11 02:11:33 +0900 | [diff] [blame] | 621 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 622 | if (attrs[XFRMA_IF_ID]) |
| 623 | x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); |
| 624 | |
Wei Yongjun | a454f0c | 2011-03-21 18:08:28 -0700 | [diff] [blame] | 625 | err = __xfrm_init_state(x, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (err) |
| 627 | goto error; |
| 628 | |
Mathias Krause | 2f30ea5 | 2016-09-08 18:09:57 +0200 | [diff] [blame] | 629 | if (attrs[XFRMA_SEC_CTX]) { |
| 630 | err = security_xfrm_state_alloc(x, |
| 631 | nla_data(attrs[XFRMA_SEC_CTX])); |
| 632 | if (err) |
| 633 | goto error; |
| 634 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 635 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 636 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
| 637 | attrs[XFRMA_REPLAY_ESN_VAL]))) |
| 638 | goto error; |
| 639 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | x->km.seq = p->seq; |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 641 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 642 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
Alexey Dobriyan | b27aead | 2008-11-25 18:00:48 -0800 | [diff] [blame] | 643 | 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] | 644 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 645 | if ((err = xfrm_init_replay(x))) |
| 646 | goto error; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 647 | |
Steffen Klassert | 9fdc488 | 2011-03-08 00:08:32 +0000 | [diff] [blame] | 648 | /* override default values from above */ |
Mathias Krause | e3ac104 | 2012-09-19 11:33:43 +0000 | [diff] [blame] | 649 | xfrm_update_ae_params(x, attrs, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
| 651 | return x; |
| 652 | |
| 653 | error: |
| 654 | x->km.state = XFRM_STATE_DEAD; |
| 655 | xfrm_state_put(x); |
| 656 | error_no_put: |
| 657 | *errp = err; |
| 658 | return NULL; |
| 659 | } |
| 660 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 661 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 662 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 664 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 665 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | struct xfrm_state *x; |
| 667 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 668 | struct km_event c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 670 | err = verify_newsa_info(p, attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | if (err) |
| 672 | return err; |
| 673 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 674 | x = xfrm_state_construct(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (!x) |
| 676 | return err; |
| 677 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 678 | xfrm_state_hold(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
| 680 | err = xfrm_state_add(x); |
| 681 | else |
| 682 | err = xfrm_state_update(x); |
| 683 | |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 684 | xfrm_audit_state_add(x, err ? 0 : 1, true); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | if (err < 0) { |
| 687 | x->km.state = XFRM_STATE_DEAD; |
Herbert Xu | 21380b8 | 2006-02-22 14:47:13 -0800 | [diff] [blame] | 688 | __xfrm_state_put(x); |
Patrick McHardy | 7d6dfe1 | 2005-06-18 22:45:31 -0700 | [diff] [blame] | 689 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } |
| 691 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 692 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 693 | c.portid = nlh->nlmsg_pid; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 694 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 695 | |
| 696 | km_state_notify(x, &c); |
Patrick McHardy | 7d6dfe1 | 2005-06-18 22:45:31 -0700 | [diff] [blame] | 697 | out: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 698 | xfrm_state_put(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | return err; |
| 700 | } |
| 701 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 702 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
| 703 | struct xfrm_usersa_id *p, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 704 | struct nlattr **attrs, |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 705 | int *errp) |
| 706 | { |
| 707 | struct xfrm_state *x = NULL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 708 | struct xfrm_mark m; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 709 | int err; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 710 | u32 mark = xfrm_mark_get(attrs, &m); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 711 | |
| 712 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { |
| 713 | err = -ESRCH; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 714 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 715 | } else { |
| 716 | xfrm_address_t *saddr = NULL; |
| 717 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 718 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 719 | if (!saddr) { |
| 720 | err = -EINVAL; |
| 721 | goto out; |
| 722 | } |
| 723 | |
Masahide NAKAMURA | 9abbffe | 2006-11-24 20:34:51 -0800 | [diff] [blame] | 724 | err = -ESRCH; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 725 | x = xfrm_state_lookup_byaddr(net, mark, |
| 726 | &p->daddr, saddr, |
Alexey Dobriyan | 221df1e | 2008-11-25 17:30:50 -0800 | [diff] [blame] | 727 | p->proto, p->family); |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 728 | } |
| 729 | |
| 730 | out: |
| 731 | if (!x && errp) |
| 732 | *errp = err; |
| 733 | return x; |
| 734 | } |
| 735 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 736 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 737 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 739 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | struct xfrm_state *x; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 741 | int err = -ESRCH; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 742 | struct km_event c; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 743 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 745 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | if (x == NULL) |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 747 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
David S. Miller | 6f68dc3 | 2006-06-08 23:58:52 -0700 | [diff] [blame] | 749 | if ((err = security_xfrm_state_delete(x)) != 0) |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 750 | goto out; |
| 751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | if (xfrm_state_kern(x)) { |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 753 | err = -EPERM; |
| 754 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 757 | err = xfrm_state_delete(x); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 758 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 759 | if (err < 0) |
| 760 | goto out; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 761 | |
| 762 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 763 | c.portid = nlh->nlmsg_pid; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 764 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 765 | km_state_notify(x, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 767 | out: |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 768 | xfrm_audit_state_delete(x, err ? 0 : 1, true); |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 769 | xfrm_state_put(x); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 770 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
| 774 | { |
Mathias Krause | f778a63 | 2012-09-19 11:33:39 +0000 | [diff] [blame] | 775 | memset(p, 0, sizeof(*p)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | memcpy(&p->id, &x->id, sizeof(p->id)); |
| 777 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); |
| 778 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); |
| 779 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); |
Sowmini Varadhan | e33d4f1 | 2015-10-21 11:48:25 -0400 | [diff] [blame] | 780 | put_unaligned(x->stats.replay_window, &p->stats.replay_window); |
| 781 | put_unaligned(x->stats.replay, &p->stats.replay); |
| 782 | put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed); |
David S. Miller | 54489c14 | 2006-10-27 15:29:47 -0700 | [diff] [blame] | 783 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | p->mode = x->props.mode; |
| 785 | p->replay_window = x->props.replay_window; |
| 786 | p->reqid = x->props.reqid; |
| 787 | p->family = x->props.family; |
| 788 | p->flags = x->props.flags; |
| 789 | p->seq = x->km.seq; |
| 790 | } |
| 791 | |
| 792 | struct xfrm_dump_info { |
| 793 | struct sk_buff *in_skb; |
| 794 | struct sk_buff *out_skb; |
| 795 | u32 nlmsg_seq; |
| 796 | u16 nlmsg_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | }; |
| 798 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 799 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
| 800 | { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 801 | struct xfrm_user_sec_ctx *uctx; |
| 802 | struct nlattr *attr; |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 803 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 804 | |
| 805 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); |
| 806 | if (attr == NULL) |
| 807 | return -EMSGSIZE; |
| 808 | |
| 809 | uctx = nla_data(attr); |
| 810 | uctx->exttype = XFRMA_SEC_CTX; |
| 811 | uctx->len = ctx_size; |
| 812 | uctx->ctx_doi = s->ctx_doi; |
| 813 | uctx->ctx_alg = s->ctx_alg; |
| 814 | uctx->ctx_len = s->ctx_len; |
| 815 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); |
| 816 | |
| 817 | return 0; |
| 818 | } |
| 819 | |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 820 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
| 821 | { |
| 822 | struct xfrm_algo *algo; |
| 823 | struct nlattr *nla; |
| 824 | |
| 825 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, |
| 826 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); |
| 827 | if (!nla) |
| 828 | return -EMSGSIZE; |
| 829 | |
| 830 | algo = nla_data(nla); |
Mathias Krause | 4c87308 | 2012-09-19 11:33:38 +0000 | [diff] [blame] | 831 | strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 832 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); |
| 833 | algo->alg_key_len = auth->alg_key_len; |
| 834 | |
| 835 | return 0; |
| 836 | } |
| 837 | |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 838 | static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m) |
| 839 | { |
| 840 | int ret = 0; |
| 841 | |
| 842 | if (m->v | m->m) { |
| 843 | ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v); |
| 844 | if (!ret) |
| 845 | ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m); |
| 846 | } |
| 847 | return ret; |
| 848 | } |
| 849 | |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 850 | /* Don't change this without updating xfrm_sa_len! */ |
| 851 | static int copy_to_user_state_extra(struct xfrm_state *x, |
| 852 | struct xfrm_usersa_info *p, |
| 853 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 855 | int ret = 0; |
| 856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | copy_to_user_state(x, p); |
| 858 | |
Nicolas Dichtel | a947b0a | 2013-02-22 10:54:54 +0100 | [diff] [blame] | 859 | if (x->props.extra_flags) { |
| 860 | ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, |
| 861 | x->props.extra_flags); |
| 862 | if (ret) |
| 863 | goto out; |
| 864 | } |
| 865 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 866 | if (x->coaddr) { |
| 867 | ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); |
| 868 | if (ret) |
| 869 | goto out; |
| 870 | } |
| 871 | if (x->lastused) { |
Nicolas Dichtel | de95c4a | 2016-04-22 17:31:23 +0200 | [diff] [blame] | 872 | ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused, |
| 873 | XFRMA_PAD); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 874 | if (ret) |
| 875 | goto out; |
| 876 | } |
| 877 | if (x->aead) { |
| 878 | ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); |
| 879 | if (ret) |
| 880 | goto out; |
| 881 | } |
| 882 | if (x->aalg) { |
| 883 | ret = copy_to_user_auth(x->aalg, skb); |
| 884 | if (!ret) |
| 885 | ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, |
| 886 | xfrm_alg_auth_len(x->aalg), x->aalg); |
| 887 | if (ret) |
| 888 | goto out; |
| 889 | } |
| 890 | if (x->ealg) { |
| 891 | ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
| 892 | if (ret) |
| 893 | goto out; |
| 894 | } |
| 895 | if (x->calg) { |
| 896 | ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
| 897 | if (ret) |
| 898 | goto out; |
| 899 | } |
| 900 | if (x->encap) { |
| 901 | ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
| 902 | if (ret) |
| 903 | goto out; |
| 904 | } |
| 905 | if (x->tfcpad) { |
| 906 | ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); |
| 907 | if (ret) |
| 908 | goto out; |
| 909 | } |
| 910 | ret = xfrm_mark_put(skb, &x->mark); |
| 911 | if (ret) |
| 912 | goto out; |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 913 | |
| 914 | ret = xfrm_smark_put(skb, &x->props.smark); |
| 915 | if (ret) |
| 916 | goto out; |
| 917 | |
dingzhi | f293a5e | 2014-10-30 09:39:36 +0100 | [diff] [blame] | 918 | if (x->replay_esn) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 919 | ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
| 920 | xfrm_replay_state_esn_len(x->replay_esn), |
| 921 | x->replay_esn); |
dingzhi | f293a5e | 2014-10-30 09:39:36 +0100 | [diff] [blame] | 922 | else |
| 923 | ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
| 924 | &x->replay); |
| 925 | if (ret) |
| 926 | goto out; |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 927 | |
| 928 | if (x->if_id) { |
| 929 | ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id); |
| 930 | if (ret) |
| 931 | goto out; |
| 932 | } |
| 933 | |
Steffen Klassert | 2a5cc53 | 2017-08-31 10:37:00 +0200 | [diff] [blame] | 934 | if (x->security) |
| 935 | ret = copy_sec_ctx(x->security, skb); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 936 | out: |
| 937 | return ret; |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 938 | } |
| 939 | |
| 940 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) |
| 941 | { |
| 942 | struct xfrm_dump_info *sp = ptr; |
| 943 | struct sk_buff *in_skb = sp->in_skb; |
| 944 | struct sk_buff *skb = sp->out_skb; |
| 945 | struct xfrm_usersa_info *p; |
| 946 | struct nlmsghdr *nlh; |
| 947 | int err; |
| 948 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 949 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 950 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); |
| 951 | if (nlh == NULL) |
| 952 | return -EMSGSIZE; |
| 953 | |
| 954 | p = nlmsg_data(nlh); |
| 955 | |
| 956 | err = copy_to_user_state_extra(x, p, skb); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 957 | if (err) { |
| 958 | nlmsg_cancel(skb, nlh); |
| 959 | return err; |
| 960 | } |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 961 | nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
| 964 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 965 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
| 966 | { |
| 967 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 968 | struct sock *sk = cb->skb->sk; |
| 969 | struct net *net = sock_net(sk); |
| 970 | |
Vegard Nossum | 1ba5bf9 | 2016-07-05 10:18:08 +0200 | [diff] [blame] | 971 | if (cb->args[0]) |
| 972 | xfrm_state_walk_done(walk, net); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 973 | return 0; |
| 974 | } |
| 975 | |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 976 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
| 978 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 979 | struct net *net = sock_net(skb->sk); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 980 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | struct xfrm_dump_info info; |
| 982 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 983 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
| 984 | sizeof(cb->args) - sizeof(cb->args[0])); |
| 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | info.in_skb = cb->skb; |
| 987 | info.out_skb = skb; |
| 988 | info.nlmsg_seq = cb->nlh->nlmsg_seq; |
| 989 | info.nlmsg_flags = NLM_F_MULTI; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 990 | |
| 991 | if (!cb->args[0]) { |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 992 | struct nlattr *attrs[XFRMA_MAX+1]; |
Nicolas Dichtel | 870a2df | 2014-03-06 18:24:29 +0100 | [diff] [blame] | 993 | struct xfrm_address_filter *filter = NULL; |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 994 | u8 proto = 0; |
| 995 | int err; |
| 996 | |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 997 | err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, |
| 998 | xfrma_policy); |
| 999 | if (err < 0) |
| 1000 | return err; |
| 1001 | |
Nicolas Dichtel | 870a2df | 2014-03-06 18:24:29 +0100 | [diff] [blame] | 1002 | if (attrs[XFRMA_ADDRESS_FILTER]) { |
Andrzej Hajda | df36756 | 2015-08-07 09:59:34 +0200 | [diff] [blame] | 1003 | filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]), |
| 1004 | sizeof(*filter), GFP_KERNEL); |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 1005 | if (filter == NULL) |
| 1006 | return -ENOMEM; |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | if (attrs[XFRMA_PROTO]) |
| 1010 | proto = nla_get_u8(attrs[XFRMA_PROTO]); |
| 1011 | |
| 1012 | xfrm_state_walk_init(walk, proto, filter); |
Vegard Nossum | 1ba5bf9 | 2016-07-05 10:18:08 +0200 | [diff] [blame] | 1013 | cb->args[0] = 1; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1014 | } |
| 1015 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1016 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
| 1018 | return skb->len; |
| 1019 | } |
| 1020 | |
| 1021 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, |
| 1022 | struct xfrm_state *x, u32 seq) |
| 1023 | { |
| 1024 | struct xfrm_dump_info info; |
| 1025 | struct sk_buff *skb; |
Mathias Krause | 864745d | 2012-09-13 11:41:26 +0000 | [diff] [blame] | 1026 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1028 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | if (!skb) |
| 1030 | return ERR_PTR(-ENOMEM); |
| 1031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | info.in_skb = in_skb; |
| 1033 | info.out_skb = skb; |
| 1034 | info.nlmsg_seq = seq; |
| 1035 | info.nlmsg_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
Mathias Krause | 864745d | 2012-09-13 11:41:26 +0000 | [diff] [blame] | 1037 | err = dump_one_state(x, 0, &info); |
| 1038 | if (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | kfree_skb(skb); |
Mathias Krause | 864745d | 2012-09-13 11:41:26 +0000 | [diff] [blame] | 1040 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | return skb; |
| 1044 | } |
| 1045 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 1046 | /* A wrapper for nlmsg_multicast() checking that nlsk is still available. |
| 1047 | * Must be called with RCU read lock. |
| 1048 | */ |
| 1049 | static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, |
| 1050 | u32 pid, unsigned int group) |
| 1051 | { |
| 1052 | struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); |
| 1053 | |
Florian Westphal | 301a6da | 2018-06-25 14:00:07 +0200 | [diff] [blame] | 1054 | if (!nlsk) { |
| 1055 | kfree_skb(skb); |
| 1056 | return -EPIPE; |
| 1057 | } |
| 1058 | |
| 1059 | return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 1060 | } |
| 1061 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1062 | static inline size_t xfrm_spdinfo_msgsize(void) |
| 1063 | { |
| 1064 | return NLMSG_ALIGN(4) |
| 1065 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1066 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)) |
| 1067 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)) |
| 1068 | + nla_total_size(sizeof(struct xfrmu_spdhthresh)); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1069 | } |
| 1070 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 1071 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1072 | u32 portid, u32 seq, u32 flags) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1073 | { |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 1074 | struct xfrmk_spdinfo si; |
| 1075 | struct xfrmu_spdinfo spc; |
| 1076 | struct xfrmu_spdhinfo sph; |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1077 | struct xfrmu_spdhthresh spt4, spt6; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1078 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1079 | int err; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1080 | u32 *f; |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1081 | unsigned lseq; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1082 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1083 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1084 | if (nlh == NULL) /* shouldn't really happen ... */ |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1085 | return -EMSGSIZE; |
| 1086 | |
| 1087 | f = nlmsg_data(nlh); |
| 1088 | *f = flags; |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 1089 | xfrm_spd_getinfo(net, &si); |
Jamal Hadi Salim | 5a6d341 | 2007-05-04 12:55:39 -0700 | [diff] [blame] | 1090 | spc.incnt = si.incnt; |
| 1091 | spc.outcnt = si.outcnt; |
| 1092 | spc.fwdcnt = si.fwdcnt; |
| 1093 | spc.inscnt = si.inscnt; |
| 1094 | spc.outscnt = si.outscnt; |
| 1095 | spc.fwdscnt = si.fwdscnt; |
| 1096 | sph.spdhcnt = si.spdhcnt; |
| 1097 | sph.spdhmcnt = si.spdhmcnt; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1098 | |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1099 | do { |
| 1100 | lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock); |
| 1101 | |
| 1102 | spt4.lbits = net->xfrm.policy_hthresh.lbits4; |
| 1103 | spt4.rbits = net->xfrm.policy_hthresh.rbits4; |
| 1104 | spt6.lbits = net->xfrm.policy_hthresh.lbits6; |
| 1105 | spt6.rbits = net->xfrm.policy_hthresh.rbits6; |
| 1106 | } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq)); |
| 1107 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1108 | err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); |
| 1109 | if (!err) |
| 1110 | err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1111 | if (!err) |
| 1112 | err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4); |
| 1113 | if (!err) |
| 1114 | err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1115 | if (err) { |
| 1116 | nlmsg_cancel(skb, nlh); |
| 1117 | return err; |
| 1118 | } |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1119 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1120 | nlmsg_end(skb, nlh); |
| 1121 | return 0; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1122 | } |
| 1123 | |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 1124 | static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
| 1125 | struct nlattr **attrs) |
| 1126 | { |
| 1127 | struct net *net = sock_net(skb->sk); |
| 1128 | struct xfrmu_spdhthresh *thresh4 = NULL; |
| 1129 | struct xfrmu_spdhthresh *thresh6 = NULL; |
| 1130 | |
| 1131 | /* selector prefixlen thresholds to hash policies */ |
| 1132 | if (attrs[XFRMA_SPD_IPV4_HTHRESH]) { |
| 1133 | struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH]; |
| 1134 | |
| 1135 | if (nla_len(rta) < sizeof(*thresh4)) |
| 1136 | return -EINVAL; |
| 1137 | thresh4 = nla_data(rta); |
| 1138 | if (thresh4->lbits > 32 || thresh4->rbits > 32) |
| 1139 | return -EINVAL; |
| 1140 | } |
| 1141 | if (attrs[XFRMA_SPD_IPV6_HTHRESH]) { |
| 1142 | struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH]; |
| 1143 | |
| 1144 | if (nla_len(rta) < sizeof(*thresh6)) |
| 1145 | return -EINVAL; |
| 1146 | thresh6 = nla_data(rta); |
| 1147 | if (thresh6->lbits > 128 || thresh6->rbits > 128) |
| 1148 | return -EINVAL; |
| 1149 | } |
| 1150 | |
| 1151 | if (thresh4 || thresh6) { |
| 1152 | write_seqlock(&net->xfrm.policy_hthresh.lock); |
| 1153 | if (thresh4) { |
| 1154 | net->xfrm.policy_hthresh.lbits4 = thresh4->lbits; |
| 1155 | net->xfrm.policy_hthresh.rbits4 = thresh4->rbits; |
| 1156 | } |
| 1157 | if (thresh6) { |
| 1158 | net->xfrm.policy_hthresh.lbits6 = thresh6->lbits; |
| 1159 | net->xfrm.policy_hthresh.rbits6 = thresh6->rbits; |
| 1160 | } |
| 1161 | write_sequnlock(&net->xfrm.policy_hthresh.lock); |
| 1162 | |
| 1163 | xfrm_policy_hash_rebuild(net); |
| 1164 | } |
| 1165 | |
| 1166 | return 0; |
| 1167 | } |
| 1168 | |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1169 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1170 | struct nlattr **attrs) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1171 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1172 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1173 | struct sk_buff *r_skb; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1174 | u32 *flags = nlmsg_data(nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1175 | u32 sportid = NETLINK_CB(skb).portid; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1176 | u32 seq = nlh->nlmsg_seq; |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1177 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1178 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1179 | if (r_skb == NULL) |
| 1180 | return -ENOMEM; |
| 1181 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1182 | if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1183 | BUG(); |
| 1184 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1185 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 1186 | } |
| 1187 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1188 | static inline size_t xfrm_sadinfo_msgsize(void) |
| 1189 | { |
| 1190 | return NLMSG_ALIGN(4) |
| 1191 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) |
| 1192 | + nla_total_size(4); /* XFRMA_SAD_CNT */ |
| 1193 | } |
| 1194 | |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 1195 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1196 | u32 portid, u32 seq, u32 flags) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1197 | { |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 1198 | struct xfrmk_sadinfo si; |
| 1199 | struct xfrmu_sadhinfo sh; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1200 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1201 | int err; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1202 | u32 *f; |
| 1203 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1204 | nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1205 | if (nlh == NULL) /* shouldn't really happen ... */ |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1206 | return -EMSGSIZE; |
| 1207 | |
| 1208 | f = nlmsg_data(nlh); |
| 1209 | *f = flags; |
Alexey Dobriyan | e071041 | 2010-01-23 13:37:10 +0000 | [diff] [blame] | 1210 | xfrm_sad_getinfo(net, &si); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1211 | |
Jamal Hadi Salim | af11e31 | 2007-05-04 12:55:13 -0700 | [diff] [blame] | 1212 | sh.sadhmcnt = si.sadhmcnt; |
| 1213 | sh.sadhcnt = si.sadhcnt; |
| 1214 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1215 | err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); |
| 1216 | if (!err) |
| 1217 | err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); |
| 1218 | if (err) { |
| 1219 | nlmsg_cancel(skb, nlh); |
| 1220 | return err; |
| 1221 | } |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1222 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1223 | nlmsg_end(skb, nlh); |
| 1224 | return 0; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1228 | struct nlattr **attrs) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1229 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1230 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1231 | struct sk_buff *r_skb; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1232 | u32 *flags = nlmsg_data(nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1233 | u32 sportid = NETLINK_CB(skb).portid; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1234 | u32 seq = nlh->nlmsg_seq; |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1235 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1236 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1237 | if (r_skb == NULL) |
| 1238 | return -ENOMEM; |
| 1239 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1240 | if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1241 | BUG(); |
| 1242 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1243 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); |
Jamal Hadi Salim | 28d8909 | 2007-04-26 00:10:29 -0700 | [diff] [blame] | 1244 | } |
| 1245 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1246 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1247 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1249 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1250 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | struct xfrm_state *x; |
| 1252 | struct sk_buff *resp_skb; |
Masahide NAKAMURA | eb2971b | 2006-08-23 17:56:04 -0700 | [diff] [blame] | 1253 | int err = -ESRCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1255 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | if (x == NULL) |
| 1257 | goto out_noput; |
| 1258 | |
| 1259 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
| 1260 | if (IS_ERR(resp_skb)) { |
| 1261 | err = PTR_ERR(resp_skb); |
| 1262 | } else { |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1263 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | xfrm_state_put(x); |
| 1266 | out_noput: |
| 1267 | return err; |
| 1268 | } |
| 1269 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1270 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1271 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1273 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | struct xfrm_state *x; |
| 1275 | struct xfrm_userspi_info *p; |
| 1276 | struct sk_buff *resp_skb; |
| 1277 | xfrm_address_t *daddr; |
| 1278 | int family; |
| 1279 | int err; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1280 | u32 mark; |
| 1281 | struct xfrm_mark m; |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1282 | u32 if_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1284 | p = nlmsg_data(nlh); |
Fan Du | 776e9dd | 2013-12-16 18:47:49 +0800 | [diff] [blame] | 1285 | err = verify_spi_info(p->info.id.proto, p->min, p->max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | if (err) |
| 1287 | goto out_noput; |
| 1288 | |
| 1289 | family = p->info.family; |
| 1290 | daddr = &p->info.id.daddr; |
| 1291 | |
| 1292 | x = NULL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1293 | |
| 1294 | mark = xfrm_mark_get(attrs, &m); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1295 | |
| 1296 | if (attrs[XFRMA_IF_ID]) |
| 1297 | if_id = nla_get_u32(attrs[XFRMA_IF_ID]); |
| 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | if (p->info.seq) { |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1300 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
YOSHIFUJI Hideaki / 吉藤英明 | 70e94e6 | 2013-01-29 12:48:50 +0000 | [diff] [blame] | 1301 | if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | xfrm_state_put(x); |
| 1303 | x = NULL; |
| 1304 | } |
| 1305 | } |
| 1306 | |
| 1307 | if (!x) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1308 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1309 | if_id, p->info.id.proto, daddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | &p->info.saddr, 1, |
| 1311 | family); |
| 1312 | err = -ENOENT; |
| 1313 | if (x == NULL) |
| 1314 | goto out_noput; |
| 1315 | |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 1316 | err = xfrm_alloc_spi(x, p->min, p->max); |
| 1317 | if (err) |
| 1318 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | |
Herbert Xu | 658b219 | 2007-10-09 13:29:52 -0700 | [diff] [blame] | 1320 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | if (IS_ERR(resp_skb)) { |
| 1322 | err = PTR_ERR(resp_skb); |
| 1323 | goto out; |
| 1324 | } |
| 1325 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1326 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | out: |
| 1329 | xfrm_state_put(x); |
| 1330 | out_noput: |
| 1331 | return err; |
| 1332 | } |
| 1333 | |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1334 | static int verify_policy_dir(u8 dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | { |
| 1336 | switch (dir) { |
| 1337 | case XFRM_POLICY_IN: |
| 1338 | case XFRM_POLICY_OUT: |
| 1339 | case XFRM_POLICY_FWD: |
| 1340 | break; |
| 1341 | |
| 1342 | default: |
| 1343 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1344 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | return 0; |
| 1347 | } |
| 1348 | |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1349 | static int verify_policy_type(u8 type) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1350 | { |
| 1351 | switch (type) { |
| 1352 | case XFRM_POLICY_TYPE_MAIN: |
| 1353 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1354 | case XFRM_POLICY_TYPE_SUB: |
| 1355 | #endif |
| 1356 | break; |
| 1357 | |
| 1358 | default: |
| 1359 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1360 | } |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1361 | |
| 1362 | return 0; |
| 1363 | } |
| 1364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
| 1366 | { |
Fan Du | e682adf | 2013-11-07 17:47:48 +0800 | [diff] [blame] | 1367 | int ret; |
| 1368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | switch (p->share) { |
| 1370 | case XFRM_SHARE_ANY: |
| 1371 | case XFRM_SHARE_SESSION: |
| 1372 | case XFRM_SHARE_USER: |
| 1373 | case XFRM_SHARE_UNIQUE: |
| 1374 | break; |
| 1375 | |
| 1376 | default: |
| 1377 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
| 1380 | switch (p->action) { |
| 1381 | case XFRM_POLICY_ALLOW: |
| 1382 | case XFRM_POLICY_BLOCK: |
| 1383 | break; |
| 1384 | |
| 1385 | default: |
| 1386 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
| 1389 | switch (p->sel.family) { |
| 1390 | case AF_INET: |
Steffen Klassert | 89cb86e | 2018-08-01 13:45:11 +0200 | [diff] [blame] | 1391 | if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) |
| 1392 | return -EINVAL; |
| 1393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | break; |
| 1395 | |
| 1396 | case AF_INET6: |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1397 | #if IS_ENABLED(CONFIG_IPV6) |
Steffen Klassert | 89cb86e | 2018-08-01 13:45:11 +0200 | [diff] [blame] | 1398 | if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) |
| 1399 | return -EINVAL; |
| 1400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | break; |
| 1402 | #else |
| 1403 | return -EAFNOSUPPORT; |
| 1404 | #endif |
| 1405 | |
| 1406 | default: |
| 1407 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1408 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
Fan Du | e682adf | 2013-11-07 17:47:48 +0800 | [diff] [blame] | 1410 | ret = verify_policy_dir(p->dir); |
| 1411 | if (ret) |
| 1412 | return ret; |
YueHaibing | 7c96721 | 2019-02-28 15:18:59 +0800 | [diff] [blame] | 1413 | if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) |
Fan Du | e682adf | 2013-11-07 17:47:48 +0800 | [diff] [blame] | 1414 | return -EINVAL; |
| 1415 | |
| 1416 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
| 1418 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1419 | 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] | 1420 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1421 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1422 | struct xfrm_user_sec_ctx *uctx; |
| 1423 | |
| 1424 | if (!rt) |
| 1425 | return 0; |
| 1426 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1427 | uctx = nla_data(rt); |
Nikolay Aleksandrov | 52a4c64 | 2014-03-07 12:44:19 +0100 | [diff] [blame] | 1428 | return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1429 | } |
| 1430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
| 1432 | int nr) |
| 1433 | { |
| 1434 | int i; |
| 1435 | |
| 1436 | xp->xfrm_nr = nr; |
| 1437 | for (i = 0; i < nr; i++, ut++) { |
| 1438 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; |
| 1439 | |
| 1440 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); |
| 1441 | memcpy(&t->saddr, &ut->saddr, |
| 1442 | sizeof(xfrm_address_t)); |
| 1443 | t->reqid = ut->reqid; |
| 1444 | t->mode = ut->mode; |
| 1445 | t->share = ut->share; |
| 1446 | t->optional = ut->optional; |
| 1447 | t->aalgos = ut->aalgos; |
| 1448 | t->ealgos = ut->ealgos; |
| 1449 | t->calgos = ut->calgos; |
Herbert Xu | c5d18e9 | 2008-04-22 00:46:42 -0700 | [diff] [blame] | 1450 | /* If all masks are ~0, then we allow all algorithms. */ |
| 1451 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); |
Miika Komu | 8511d01 | 2006-11-30 16:40:51 -0800 | [diff] [blame] | 1452 | t->encap_family = ut->family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
| 1454 | } |
| 1455 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1456 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
| 1457 | { |
Steffen Klassert | 9a54c51 | 2017-12-08 08:07:25 +0100 | [diff] [blame] | 1458 | u16 prev_family; |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1459 | int i; |
| 1460 | |
| 1461 | if (nr > XFRM_MAX_DEPTH) |
| 1462 | return -EINVAL; |
| 1463 | |
Steffen Klassert | 9a54c51 | 2017-12-08 08:07:25 +0100 | [diff] [blame] | 1464 | prev_family = family; |
| 1465 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1466 | for (i = 0; i < nr; i++) { |
| 1467 | /* We never validated the ut->family value, so many |
| 1468 | * applications simply leave it at zero. The check was |
| 1469 | * never made and ut->family was ignored because all |
| 1470 | * templates could be assumed to have the same family as |
| 1471 | * the policy itself. Now that we will have ipv4-in-ipv6 |
| 1472 | * and ipv6-in-ipv4 tunnels, this is no longer true. |
| 1473 | */ |
| 1474 | if (!ut[i].family) |
| 1475 | ut[i].family = family; |
| 1476 | |
Florian Westphal | a19fd85 | 2019-01-09 14:37:34 +0100 | [diff] [blame] | 1477 | switch (ut[i].mode) { |
| 1478 | case XFRM_MODE_TUNNEL: |
| 1479 | case XFRM_MODE_BEET: |
| 1480 | break; |
| 1481 | default: |
| 1482 | if (ut[i].family != prev_family) |
| 1483 | return -EINVAL; |
| 1484 | break; |
| 1485 | } |
Sean Tranchetti | de500b9 | 2018-09-19 13:54:56 -0600 | [diff] [blame] | 1486 | if (ut[i].mode >= XFRM_MODE_MAX) |
| 1487 | return -EINVAL; |
| 1488 | |
Steffen Klassert | 9a54c51 | 2017-12-08 08:07:25 +0100 | [diff] [blame] | 1489 | prev_family = ut[i].family; |
| 1490 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1491 | switch (ut[i].family) { |
| 1492 | case AF_INET: |
| 1493 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 1494 | #if IS_ENABLED(CONFIG_IPV6) |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1495 | case AF_INET6: |
| 1496 | break; |
| 1497 | #endif |
| 1498 | default: |
| 1499 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1500 | } |
Cong Wang | 8555288 | 2017-11-27 11:15:16 -0800 | [diff] [blame] | 1501 | |
Cong Wang | 88d0831 | 2019-03-22 16:26:19 -0700 | [diff] [blame] | 1502 | if (!xfrm_id_proto_valid(ut[i].id.proto)) |
Cong Wang | 8555288 | 2017-11-27 11:15:16 -0800 | [diff] [blame] | 1503 | return -EINVAL; |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1504 | } |
| 1505 | |
| 1506 | return 0; |
| 1507 | } |
| 1508 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1509 | 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] | 1510 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1511 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
| 1513 | if (!rt) { |
| 1514 | pol->xfrm_nr = 0; |
| 1515 | } else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1516 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
| 1517 | int nr = nla_len(rt) / sizeof(*utmpl); |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1518 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 1520 | err = validate_tmpl(nr, utmpl, pol->family); |
| 1521 | if (err) |
| 1522 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1524 | copy_templates(pol, utmpl, nr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | } |
| 1526 | return 0; |
| 1527 | } |
| 1528 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1529 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1530 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1531 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1532 | struct xfrm_userpolicy_type *upt; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1533 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1534 | int err; |
| 1535 | |
| 1536 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1537 | upt = nla_data(rt); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1538 | type = upt->type; |
| 1539 | } |
| 1540 | |
| 1541 | err = verify_policy_type(type); |
| 1542 | if (err) |
| 1543 | return err; |
| 1544 | |
| 1545 | *tp = type; |
| 1546 | return 0; |
| 1547 | } |
| 1548 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
| 1550 | { |
| 1551 | xp->priority = p->priority; |
| 1552 | xp->index = p->index; |
| 1553 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); |
| 1554 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); |
| 1555 | xp->action = p->action; |
| 1556 | xp->flags = p->flags; |
| 1557 | xp->family = p->sel.family; |
| 1558 | /* XXX xp->share = p->share; */ |
| 1559 | } |
| 1560 | |
| 1561 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) |
| 1562 | { |
Mathias Krause | 7b78983 | 2012-09-19 11:33:40 +0000 | [diff] [blame] | 1563 | memset(p, 0, sizeof(*p)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); |
| 1565 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); |
| 1566 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); |
| 1567 | p->priority = xp->priority; |
| 1568 | p->index = xp->index; |
| 1569 | p->sel.family = xp->family; |
| 1570 | p->dir = dir; |
| 1571 | p->action = xp->action; |
| 1572 | p->flags = xp->flags; |
| 1573 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ |
| 1574 | } |
| 1575 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1576 | 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] | 1577 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1578 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | int err; |
| 1580 | |
| 1581 | if (!xp) { |
| 1582 | *errp = -ENOMEM; |
| 1583 | return NULL; |
| 1584 | } |
| 1585 | |
| 1586 | copy_from_user_policy(xp, p); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1587 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1588 | err = copy_from_user_policy_type(&xp->type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1589 | if (err) |
| 1590 | goto error; |
| 1591 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1592 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
| 1593 | err = copy_from_user_sec_ctx(xp, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1594 | if (err) |
| 1595 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1597 | xfrm_mark_get(attrs, &xp->mark); |
| 1598 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1599 | if (attrs[XFRMA_IF_ID]) |
| 1600 | xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]); |
| 1601 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | return xp; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1603 | error: |
| 1604 | *errp = err; |
Herbert Xu | 12a169e | 2008-10-01 07:03:24 -0700 | [diff] [blame] | 1605 | xp->walk.dead = 1; |
WANG Cong | 64c31b3 | 2008-01-07 22:34:29 -0800 | [diff] [blame] | 1606 | xfrm_policy_destroy(xp); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1607 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | } |
| 1609 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1610 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1611 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1613 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1614 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | struct xfrm_policy *xp; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1616 | struct km_event c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | int err; |
| 1618 | int excl; |
| 1619 | |
| 1620 | err = verify_newpolicy_info(p); |
| 1621 | if (err) |
| 1622 | return err; |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1623 | err = verify_sec_ctx_len(attrs); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1624 | if (err) |
| 1625 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1627 | xp = xfrm_policy_construct(net, p, attrs, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | if (!xp) |
| 1629 | return err; |
| 1630 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1631 | /* shouldn't excl be based on nlh flags?? |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1632 | * Aha! this is anti-netlink really i.e more pfkey derived |
| 1633 | * in netlink excl is a flag and you wouldnt need |
| 1634 | * a type XFRM_MSG_UPDPOLICY - JHS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
| 1636 | err = xfrm_policy_insert(p->dir, xp, excl); |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 1637 | xfrm_audit_policy_add(xp, err ? 0 : 1, true); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 1638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | if (err) { |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1640 | security_xfrm_policy_free(xp->security); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | kfree(xp); |
| 1642 | return err; |
| 1643 | } |
| 1644 | |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1645 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1646 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1647 | c.portid = nlh->nlmsg_pid; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1648 | km_policy_notify(xp, p->dir, &c); |
| 1649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | xfrm_pol_put(xp); |
| 1651 | |
| 1652 | return 0; |
| 1653 | } |
| 1654 | |
| 1655 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) |
| 1656 | { |
| 1657 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; |
| 1658 | int i; |
| 1659 | |
| 1660 | if (xp->xfrm_nr == 0) |
| 1661 | return 0; |
| 1662 | |
| 1663 | for (i = 0; i < xp->xfrm_nr; i++) { |
| 1664 | struct xfrm_user_tmpl *up = &vec[i]; |
| 1665 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; |
| 1666 | |
Mathias Krause | 1f86840 | 2012-09-19 11:33:41 +0000 | [diff] [blame] | 1667 | memset(up, 0, sizeof(*up)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | memcpy(&up->id, &kp->id, sizeof(up->id)); |
Miika Komu | 8511d01 | 2006-11-30 16:40:51 -0800 | [diff] [blame] | 1669 | up->family = kp->encap_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
| 1671 | up->reqid = kp->reqid; |
| 1672 | up->mode = kp->mode; |
| 1673 | up->share = kp->share; |
| 1674 | up->optional = kp->optional; |
| 1675 | up->aalgos = kp->aalgos; |
| 1676 | up->ealgos = kp->ealgos; |
| 1677 | up->calgos = kp->calgos; |
| 1678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1680 | return nla_put(skb, XFRMA_TMPL, |
| 1681 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1682 | } |
| 1683 | |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1684 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) |
| 1685 | { |
| 1686 | if (x->security) { |
| 1687 | return copy_sec_ctx(x->security, skb); |
| 1688 | } |
| 1689 | return 0; |
| 1690 | } |
| 1691 | |
| 1692 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
| 1693 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1694 | if (xp->security) |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1695 | return copy_sec_ctx(xp->security, skb); |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1696 | return 0; |
| 1697 | } |
Thomas Graf | cfbfd45 | 2007-08-22 13:57:04 -0700 | [diff] [blame] | 1698 | static inline size_t userpolicy_type_attrsize(void) |
| 1699 | { |
| 1700 | #ifdef CONFIG_XFRM_SUB_POLICY |
| 1701 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); |
| 1702 | #else |
| 1703 | return 0; |
| 1704 | #endif |
| 1705 | } |
Serge Hallyn | 0d68162 | 2006-07-24 23:30:44 -0700 | [diff] [blame] | 1706 | |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1707 | #ifdef CONFIG_XFRM_SUB_POLICY |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1708 | 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] | 1709 | { |
Eric Dumazet | 2038a9e | 2018-06-18 21:35:07 -0700 | [diff] [blame] | 1710 | struct xfrm_userpolicy_type upt; |
| 1711 | |
| 1712 | /* Sadly there are two holes in struct xfrm_userpolicy_type */ |
| 1713 | memset(&upt, 0, sizeof(upt)); |
| 1714 | upt.type = type; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1715 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 1716 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1717 | } |
| 1718 | |
| 1719 | #else |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1720 | 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] | 1721 | { |
| 1722 | return 0; |
| 1723 | } |
| 1724 | #endif |
| 1725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
| 1727 | { |
| 1728 | struct xfrm_dump_info *sp = ptr; |
| 1729 | struct xfrm_userpolicy_info *p; |
| 1730 | struct sk_buff *in_skb = sp->in_skb; |
| 1731 | struct sk_buff *skb = sp->out_skb; |
| 1732 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1733 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1735 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 1736 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); |
| 1737 | if (nlh == NULL) |
| 1738 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1740 | p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | copy_to_user_policy(xp, p, dir); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1742 | err = copy_to_user_tmpl(xp, skb); |
| 1743 | if (!err) |
| 1744 | err = copy_to_user_sec_ctx(xp, skb); |
| 1745 | if (!err) |
| 1746 | err = copy_to_user_policy_type(xp->type, skb); |
| 1747 | if (!err) |
| 1748 | err = xfrm_mark_put(skb, &xp->mark); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1749 | if (!err) |
| 1750 | err = xfrm_if_id_put(skb, xp->if_id); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1751 | if (err) { |
| 1752 | nlmsg_cancel(skb, nlh); |
| 1753 | return err; |
| 1754 | } |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1755 | nlmsg_end(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | } |
| 1758 | |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1759 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
| 1760 | { |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 1761 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1762 | struct net *net = sock_net(cb->skb->sk); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1763 | |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 1764 | xfrm_policy_walk_done(walk, net); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1765 | return 0; |
| 1766 | } |
| 1767 | |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 1768 | static int xfrm_dump_policy_start(struct netlink_callback *cb) |
| 1769 | { |
| 1770 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; |
| 1771 | |
| 1772 | BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args)); |
| 1773 | |
| 1774 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); |
| 1775 | return 0; |
| 1776 | } |
| 1777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
| 1779 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1780 | struct net *net = sock_net(skb->sk); |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 1781 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | struct xfrm_dump_info info; |
| 1783 | |
| 1784 | info.in_skb = cb->skb; |
| 1785 | info.out_skb = skb; |
| 1786 | info.nlmsg_seq = cb->nlh->nlmsg_seq; |
| 1787 | info.nlmsg_flags = NLM_F_MULTI; |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 1788 | |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1789 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | |
| 1791 | return skb->len; |
| 1792 | } |
| 1793 | |
| 1794 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, |
| 1795 | struct xfrm_policy *xp, |
| 1796 | int dir, u32 seq) |
| 1797 | { |
| 1798 | struct xfrm_dump_info info; |
| 1799 | struct sk_buff *skb; |
Mathias Krause | c254637 | 2012-09-14 09:58:32 +0000 | [diff] [blame] | 1800 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1802 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | if (!skb) |
| 1804 | return ERR_PTR(-ENOMEM); |
| 1805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | info.in_skb = in_skb; |
| 1807 | info.out_skb = skb; |
| 1808 | info.nlmsg_seq = seq; |
| 1809 | info.nlmsg_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
Mathias Krause | c254637 | 2012-09-14 09:58:32 +0000 | [diff] [blame] | 1811 | err = dump_one_policy(xp, dir, 0, &info); |
| 1812 | if (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | kfree_skb(skb); |
Mathias Krause | c254637 | 2012-09-14 09:58:32 +0000 | [diff] [blame] | 1814 | return ERR_PTR(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | } |
| 1816 | |
| 1817 | return skb; |
| 1818 | } |
| 1819 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1820 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1821 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1823 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | struct xfrm_policy *xp; |
| 1825 | struct xfrm_userpolicy_id *p; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 1826 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1828 | struct km_event c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | int delete; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 1830 | struct xfrm_mark m; |
| 1831 | u32 mark = xfrm_mark_get(attrs, &m); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1832 | u32 if_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1834 | p = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
| 1836 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1837 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 1838 | if (err) |
| 1839 | return err; |
| 1840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | err = verify_policy_dir(p->dir); |
| 1842 | if (err) |
| 1843 | return err; |
| 1844 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1845 | if (attrs[XFRMA_IF_ID]) |
| 1846 | if_id = nla_get_u32(attrs[XFRMA_IF_ID]); |
| 1847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | if (p->index) |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1849 | xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1850 | else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1851 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1852 | struct xfrm_sec_ctx *ctx; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1853 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 1854 | err = verify_sec_ctx_len(attrs); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1855 | if (err) |
| 1856 | return err; |
| 1857 | |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1858 | ctx = NULL; |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1859 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1860 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1861 | |
Nikolay Aleksandrov | 52a4c64 | 2014-03-07 12:44:19 +0100 | [diff] [blame] | 1862 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1863 | if (err) |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1864 | return err; |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 1865 | } |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1866 | xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1867 | ctx, delete, &err); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 1868 | security_xfrm_policy_free(ctx); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1869 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | if (xp == NULL) |
| 1871 | return -ENOENT; |
| 1872 | |
| 1873 | if (!delete) { |
| 1874 | struct sk_buff *resp_skb; |
| 1875 | |
| 1876 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); |
| 1877 | if (IS_ERR(resp_skb)) { |
| 1878 | err = PTR_ERR(resp_skb); |
| 1879 | } else { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 1880 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1881 | NETLINK_CB(skb).portid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1883 | } else { |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 1884 | xfrm_audit_policy_delete(xp, err ? 0 : 1, true); |
David S. Miller | 13fcfbb0 | 2007-02-12 13:53:54 -0800 | [diff] [blame] | 1885 | |
| 1886 | if (err != 0) |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 1887 | goto out; |
David S. Miller | 13fcfbb0 | 2007-02-12 13:53:54 -0800 | [diff] [blame] | 1888 | |
Herbert Xu | e744389 | 2005-06-18 22:44:18 -0700 | [diff] [blame] | 1889 | c.data.byid = p->index; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1890 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1891 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1892 | c.portid = nlh->nlmsg_pid; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1893 | km_policy_notify(xp, p->dir, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | } |
| 1895 | |
Catherine Zhang | c8c05a8 | 2006-06-08 23:39:49 -0700 | [diff] [blame] | 1896 | out: |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 1897 | xfrm_pol_put(xp); |
Paul Moore | e4c1721 | 2013-05-29 07:36:25 +0000 | [diff] [blame] | 1898 | if (delete && err == 0) |
| 1899 | xfrm_garbage_collect(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | return err; |
| 1901 | } |
| 1902 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 1903 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 1904 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 1906 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1907 | struct km_event c; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1908 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
Joy Latten | 4aa2e62 | 2007-06-04 19:05:57 -0400 | [diff] [blame] | 1909 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 1911 | err = xfrm_state_flush(net, p->proto, true); |
Jamal Hadi Salim | 9e64cc9 | 2010-02-19 02:00:41 +0000 | [diff] [blame] | 1912 | if (err) { |
| 1913 | if (err == -ESRCH) /* empty table */ |
| 1914 | return 0; |
David S. Miller | 069c474 | 2010-02-17 13:41:40 -0800 | [diff] [blame] | 1915 | return err; |
Jamal Hadi Salim | 9e64cc9 | 2010-02-19 02:00:41 +0000 | [diff] [blame] | 1916 | } |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 1917 | c.data.proto = p->proto; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 1918 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1919 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1920 | c.portid = nlh->nlmsg_pid; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 1921 | c.net = net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 1922 | km_state_notify(NULL, &c); |
| 1923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | return 0; |
| 1925 | } |
| 1926 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 1927 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1928 | { |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 1929 | size_t replay_size = x->replay_esn ? |
| 1930 | xfrm_replay_state_esn_len(x->replay_esn) : |
| 1931 | sizeof(struct xfrm_replay_state); |
| 1932 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1933 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 1934 | + nla_total_size(replay_size) |
Nicolas Dichtel | de95c4a | 2016-04-22 17:31:23 +0200 | [diff] [blame] | 1935 | + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur)) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1936 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 1937 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
| 1938 | + nla_total_size(4); /* XFRM_AE_ETHR */ |
| 1939 | } |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1940 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 1941 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1942 | { |
| 1943 | struct xfrm_aevent_id *id; |
| 1944 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1945 | int err; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1946 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1947 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 1948 | if (nlh == NULL) |
| 1949 | return -EMSGSIZE; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1950 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 1951 | id = nlmsg_data(nlh); |
Weilong Chen | 9b7a787 | 2013-12-24 09:43:46 +0800 | [diff] [blame] | 1952 | 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] | 1953 | id->sa_id.spi = x->id.spi; |
| 1954 | id->sa_id.family = x->props.family; |
| 1955 | id->sa_id.proto = x->id.proto; |
Weilong Chen | 9b7a787 | 2013-12-24 09:43:46 +0800 | [diff] [blame] | 1956 | memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); |
Jamal Hadi Salim | 2b5f6dc | 2006-12-02 22:22:25 -0800 | [diff] [blame] | 1957 | id->reqid = x->props.reqid; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1958 | id->flags = c->data.aevent; |
| 1959 | |
David S. Miller | d0fde79 | 2012-03-29 04:02:26 -0400 | [diff] [blame] | 1960 | if (x->replay_esn) { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1961 | err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, |
| 1962 | xfrm_replay_state_esn_len(x->replay_esn), |
| 1963 | x->replay_esn); |
David S. Miller | d0fde79 | 2012-03-29 04:02:26 -0400 | [diff] [blame] | 1964 | } else { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1965 | err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), |
| 1966 | &x->replay); |
David S. Miller | d0fde79 | 2012-03-29 04:02:26 -0400 | [diff] [blame] | 1967 | } |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1968 | if (err) |
| 1969 | goto out_cancel; |
Nicolas Dichtel | de95c4a | 2016-04-22 17:31:23 +0200 | [diff] [blame] | 1970 | err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft, |
| 1971 | XFRMA_PAD); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1972 | if (err) |
| 1973 | goto out_cancel; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 1974 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1975 | if (id->flags & XFRM_AE_RTHR) { |
| 1976 | err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); |
| 1977 | if (err) |
| 1978 | goto out_cancel; |
| 1979 | } |
| 1980 | if (id->flags & XFRM_AE_ETHR) { |
| 1981 | err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, |
| 1982 | x->replay_maxage * 10 / HZ); |
| 1983 | if (err) |
| 1984 | goto out_cancel; |
| 1985 | } |
| 1986 | err = xfrm_mark_put(skb, &x->mark); |
| 1987 | if (err) |
| 1988 | goto out_cancel; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 1989 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 1990 | err = xfrm_if_id_put(skb, x->if_id); |
| 1991 | if (err) |
| 1992 | goto out_cancel; |
| 1993 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 1994 | nlmsg_end(skb, nlh); |
| 1995 | return 0; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 1996 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1997 | out_cancel: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 1998 | nlmsg_cancel(skb, nlh); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 1999 | return err; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2000 | } |
| 2001 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2002 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2003 | struct nlattr **attrs) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2004 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2005 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2006 | struct xfrm_state *x; |
| 2007 | struct sk_buff *r_skb; |
| 2008 | int err; |
| 2009 | struct km_event c; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2010 | u32 mark; |
| 2011 | struct xfrm_mark m; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2012 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2013 | struct xfrm_usersa_id *id = &p->sa_id; |
| 2014 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2015 | mark = xfrm_mark_get(attrs, &m); |
| 2016 | |
| 2017 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2018 | if (x == NULL) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2019 | return -ESRCH; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2020 | |
| 2021 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
| 2022 | if (r_skb == NULL) { |
| 2023 | xfrm_state_put(x); |
| 2024 | return -ENOMEM; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2025 | } |
| 2026 | |
| 2027 | /* |
| 2028 | * XXX: is this lock really needed - none of the other |
| 2029 | * gets lock (the concern is things getting updated |
| 2030 | * while we are still reading) - jhs |
| 2031 | */ |
| 2032 | spin_lock_bh(&x->lock); |
| 2033 | c.data.aevent = p->flags; |
| 2034 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2035 | c.portid = nlh->nlmsg_pid; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2036 | |
| 2037 | if (build_aevent(r_skb, x, &c) < 0) |
| 2038 | BUG(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2039 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2040 | spin_unlock_bh(&x->lock); |
| 2041 | xfrm_state_put(x); |
| 2042 | return err; |
| 2043 | } |
| 2044 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2045 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2046 | struct nlattr **attrs) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2047 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2048 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2049 | struct xfrm_state *x; |
| 2050 | struct km_event c; |
Weilong Chen | 02d0892 | 2013-12-24 09:43:48 +0800 | [diff] [blame] | 2051 | int err = -EINVAL; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2052 | u32 mark = 0; |
| 2053 | struct xfrm_mark m; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2054 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2055 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2056 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2057 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
Michael Rossberg | 4e07723 | 2015-09-29 11:25:08 +0200 | [diff] [blame] | 2058 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; |
| 2059 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2060 | |
Michael Rossberg | 4e07723 | 2015-09-29 11:25:08 +0200 | [diff] [blame] | 2061 | if (!lt && !rp && !re && !et && !rt) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2062 | return err; |
| 2063 | |
| 2064 | /* pedantic mode - thou shalt sayeth replaceth */ |
| 2065 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) |
| 2066 | return err; |
| 2067 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2068 | mark = xfrm_mark_get(attrs, &m); |
| 2069 | |
| 2070 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2071 | if (x == NULL) |
| 2072 | return -ESRCH; |
| 2073 | |
| 2074 | if (x->km.state != XFRM_STATE_VALID) |
| 2075 | goto out; |
| 2076 | |
Steffen Klassert | 4479ff7 | 2013-09-09 09:39:01 +0200 | [diff] [blame] | 2077 | err = xfrm_replay_verify_len(x->replay_esn, re); |
Steffen Klassert | e2b1912 | 2011-03-28 19:47:30 +0000 | [diff] [blame] | 2078 | if (err) |
| 2079 | goto out; |
| 2080 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2081 | spin_lock_bh(&x->lock); |
Mathias Krause | e3ac104 | 2012-09-19 11:33:43 +0000 | [diff] [blame] | 2082 | xfrm_update_ae_params(x, attrs, 1); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2083 | spin_unlock_bh(&x->lock); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2084 | |
| 2085 | c.event = nlh->nlmsg_type; |
| 2086 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2087 | c.portid = nlh->nlmsg_pid; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2088 | c.data.aevent = XFRM_AE_CU; |
| 2089 | km_state_notify(x, &c); |
| 2090 | err = 0; |
| 2091 | out: |
| 2092 | xfrm_state_put(x); |
| 2093 | return err; |
| 2094 | } |
| 2095 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2096 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2097 | struct nlattr **attrs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2099 | struct net *net = sock_net(skb->sk); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2100 | struct km_event c; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 2101 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2102 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2103 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2104 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2105 | if (err) |
| 2106 | return err; |
| 2107 | |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 2108 | err = xfrm_policy_flush(net, type, true); |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 2109 | if (err) { |
| 2110 | if (err == -ESRCH) /* empty table */ |
| 2111 | return 0; |
David S. Miller | 069c474 | 2010-02-17 13:41:40 -0800 | [diff] [blame] | 2112 | return err; |
Jamal Hadi Salim | 2f1eb65 | 2010-02-19 02:00:42 +0000 | [diff] [blame] | 2113 | } |
| 2114 | |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2115 | c.data.type = type; |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2116 | c.event = nlh->nlmsg_type; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2117 | c.seq = nlh->nlmsg_seq; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2118 | c.portid = nlh->nlmsg_pid; |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 2119 | c.net = net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2120 | km_policy_notify(NULL, 0, &c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | return 0; |
| 2122 | } |
| 2123 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2124 | 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] | 2125 | struct nlattr **attrs) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2126 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2127 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2128 | struct xfrm_policy *xp; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2129 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2130 | struct xfrm_userpolicy_info *p = &up->pol; |
Jamal Hadi Salim | b798a9e | 2006-11-27 12:59:30 -0800 | [diff] [blame] | 2131 | u8 type = XFRM_POLICY_TYPE_MAIN; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2132 | int err = -ENOENT; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2133 | struct xfrm_mark m; |
| 2134 | u32 mark = xfrm_mark_get(attrs, &m); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2135 | u32 if_id = 0; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2136 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2137 | err = copy_from_user_policy_type(&type, attrs); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2138 | if (err) |
| 2139 | return err; |
| 2140 | |
Timo Teräs | c8bf4d0 | 2010-03-31 00:17:04 +0000 | [diff] [blame] | 2141 | err = verify_policy_dir(p->dir); |
| 2142 | if (err) |
| 2143 | return err; |
| 2144 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2145 | if (attrs[XFRMA_IF_ID]) |
| 2146 | if_id = nla_get_u32(attrs[XFRMA_IF_ID]); |
| 2147 | |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2148 | if (p->index) |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2149 | xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2150 | else { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2151 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 2152 | struct xfrm_sec_ctx *ctx; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2153 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2154 | err = verify_sec_ctx_len(attrs); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2155 | if (err) |
| 2156 | return err; |
| 2157 | |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 2158 | ctx = NULL; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2159 | if (rt) { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2160 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2161 | |
Nikolay Aleksandrov | 52a4c64 | 2014-03-07 12:44:19 +0100 | [diff] [blame] | 2162 | err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 2163 | if (err) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2164 | return err; |
Denis V. Lunev | 2c8dd11 | 2008-04-14 14:47:48 -0700 | [diff] [blame] | 2165 | } |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2166 | xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2167 | &p->sel, ctx, 0, &err); |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 2168 | security_xfrm_policy_free(ctx); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2169 | } |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2170 | if (xp == NULL) |
Eric Paris | ef41aaa | 2007-03-07 15:37:58 -0800 | [diff] [blame] | 2171 | return -ENOENT; |
Paul Moore | 03e1ad7 | 2008-04-12 19:07:52 -0700 | [diff] [blame] | 2172 | |
Timo Teräs | ea2dea9 | 2010-03-31 00:17:05 +0000 | [diff] [blame] | 2173 | if (unlikely(xp->walk.dead)) |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2174 | goto out; |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2175 | |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2176 | err = 0; |
| 2177 | if (up->hard) { |
| 2178 | xfrm_policy_delete(xp, p->dir); |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 2179 | xfrm_audit_policy_delete(xp, 1, true); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2180 | } |
Eric W. Biederman | c6bb813 | 2012-09-07 21:17:17 +0000 | [diff] [blame] | 2181 | km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2182 | |
| 2183 | out: |
| 2184 | xfrm_pol_put(xp); |
| 2185 | return err; |
| 2186 | } |
| 2187 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2188 | 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] | 2189 | struct nlattr **attrs) |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2190 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2191 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2192 | struct xfrm_state *x; |
| 2193 | int err; |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2194 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2195 | struct xfrm_usersa_info *p = &ue->state; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2196 | struct xfrm_mark m; |
Nicolas Dichtel | 928497f | 2010-08-31 05:54:00 +0000 | [diff] [blame] | 2197 | u32 mark = xfrm_mark_get(attrs, &m); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2198 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2199 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2200 | |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 2201 | err = -ENOENT; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2202 | if (x == NULL) |
| 2203 | return err; |
| 2204 | |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2205 | spin_lock_bh(&x->lock); |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 2206 | err = -EINVAL; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2207 | if (x->km.state != XFRM_STATE_VALID) |
| 2208 | goto out; |
Eric W. Biederman | c6bb813 | 2012-09-07 21:17:17 +0000 | [diff] [blame] | 2209 | km_state_expired(x, ue->hard, nlh->nlmsg_pid); |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2210 | |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 2211 | if (ue->hard) { |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2212 | __xfrm_state_delete(x); |
Tetsuo Handa | 2e71029 | 2014-04-22 21:48:30 +0900 | [diff] [blame] | 2213 | xfrm_audit_state_delete(x, 1, true); |
Joy Latten | 161a09e | 2006-11-27 13:11:54 -0600 | [diff] [blame] | 2214 | } |
David S. Miller | 3a765aa | 2007-02-26 14:52:21 -0800 | [diff] [blame] | 2215 | err = 0; |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2216 | out: |
| 2217 | spin_unlock_bh(&x->lock); |
| 2218 | xfrm_state_put(x); |
| 2219 | return err; |
| 2220 | } |
| 2221 | |
Christoph Hellwig | 22e7005 | 2007-01-02 15:22:30 -0800 | [diff] [blame] | 2222 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2223 | struct nlattr **attrs) |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2224 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2225 | struct net *net = sock_net(skb->sk); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2226 | struct xfrm_policy *xp; |
| 2227 | struct xfrm_user_tmpl *ut; |
| 2228 | int i; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2229 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2230 | struct xfrm_mark mark; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2231 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2232 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2233 | struct xfrm_state *x = xfrm_state_alloc(net); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2234 | int err = -ENOMEM; |
| 2235 | |
| 2236 | if (!x) |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 2237 | goto nomem; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2238 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2239 | xfrm_mark_get(attrs, &mark); |
| 2240 | |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2241 | err = verify_newpolicy_info(&ua->policy); |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 2242 | if (err) |
Vegard Nossum | 73efc32 | 2016-07-27 08:03:18 +0200 | [diff] [blame] | 2243 | goto free_state; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2244 | |
| 2245 | /* build an XP */ |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2246 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 2247 | if (!xp) |
| 2248 | goto free_state; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2249 | |
| 2250 | memcpy(&x->id, &ua->id, sizeof(ua->id)); |
| 2251 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); |
| 2252 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2253 | xp->mark.m = x->mark.m = mark.m; |
| 2254 | xp->mark.v = x->mark.v = mark.v; |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2255 | ut = nla_data(rt); |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2256 | /* extract the templates and for each call km_key */ |
| 2257 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { |
| 2258 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; |
| 2259 | memcpy(&x->id, &t->id, sizeof(x->id)); |
| 2260 | x->props.mode = t->mode; |
| 2261 | x->props.reqid = t->reqid; |
| 2262 | x->props.family = ut->family; |
| 2263 | t->aalgos = ua->aalgos; |
| 2264 | t->ealgos = ua->ealgos; |
| 2265 | t->calgos = ua->calgos; |
| 2266 | err = km_query(x, t, xp); |
| 2267 | |
| 2268 | } |
| 2269 | |
| 2270 | kfree(x); |
| 2271 | kfree(xp); |
| 2272 | |
| 2273 | return 0; |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 2274 | |
Ilpo Järvinen | d8eb930 | 2008-12-14 23:16:22 -0800 | [diff] [blame] | 2275 | free_state: |
| 2276 | kfree(x); |
| 2277 | nomem: |
| 2278 | return err; |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2279 | } |
| 2280 | |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2281 | #ifdef CONFIG_XFRM_MIGRATE |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2282 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2283 | struct xfrm_kmaddress *k, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2284 | struct nlattr **attrs, int *num) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2285 | { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2286 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2287 | struct xfrm_user_migrate *um; |
| 2288 | int i, num_migrate; |
| 2289 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2290 | if (k != NULL) { |
| 2291 | struct xfrm_user_kmaddress *uk; |
| 2292 | |
| 2293 | uk = nla_data(attrs[XFRMA_KMADDRESS]); |
| 2294 | memcpy(&k->local, &uk->local, sizeof(k->local)); |
| 2295 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); |
| 2296 | k->family = uk->family; |
| 2297 | k->reserved = uk->reserved; |
| 2298 | } |
| 2299 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2300 | um = nla_data(rt); |
| 2301 | num_migrate = nla_len(rt) / sizeof(*um); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2302 | |
| 2303 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) |
| 2304 | return -EINVAL; |
| 2305 | |
| 2306 | for (i = 0; i < num_migrate; i++, um++, ma++) { |
| 2307 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); |
| 2308 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); |
| 2309 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); |
| 2310 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); |
| 2311 | |
| 2312 | ma->proto = um->proto; |
| 2313 | ma->mode = um->mode; |
| 2314 | ma->reqid = um->reqid; |
| 2315 | |
| 2316 | ma->old_family = um->old_family; |
| 2317 | ma->new_family = um->new_family; |
| 2318 | } |
| 2319 | |
| 2320 | *num = i; |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2325 | struct nlattr **attrs) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2326 | { |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2327 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2328 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2329 | struct xfrm_kmaddress km, *kmp; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2330 | u8 type; |
| 2331 | int err; |
| 2332 | int n = 0; |
Fan Du | 8d549c4 | 2013-11-07 17:47:49 +0800 | [diff] [blame] | 2333 | struct net *net = sock_net(skb->sk); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2334 | |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2335 | if (attrs[XFRMA_MIGRATE] == NULL) |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2336 | return -EINVAL; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2337 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2338 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
| 2339 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2340 | err = copy_from_user_policy_type(&type, attrs); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2341 | if (err) |
| 2342 | return err; |
| 2343 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2344 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2345 | if (err) |
| 2346 | return err; |
| 2347 | |
| 2348 | if (!n) |
| 2349 | return 0; |
| 2350 | |
Fan Du | 8d549c4 | 2013-11-07 17:47:49 +0800 | [diff] [blame] | 2351 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2352 | |
| 2353 | return 0; |
| 2354 | } |
| 2355 | #else |
| 2356 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2357 | struct nlattr **attrs) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2358 | { |
| 2359 | return -ENOPROTOOPT; |
| 2360 | } |
| 2361 | #endif |
| 2362 | |
| 2363 | #ifdef CONFIG_XFRM_MIGRATE |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2364 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2365 | { |
| 2366 | struct xfrm_user_migrate um; |
| 2367 | |
| 2368 | memset(&um, 0, sizeof(um)); |
| 2369 | um.proto = m->proto; |
| 2370 | um.mode = m->mode; |
| 2371 | um.reqid = m->reqid; |
| 2372 | um.old_family = m->old_family; |
| 2373 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); |
| 2374 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); |
| 2375 | um.new_family = m->new_family; |
| 2376 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); |
| 2377 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); |
| 2378 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2379 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2380 | } |
| 2381 | |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2382 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2383 | { |
| 2384 | struct xfrm_user_kmaddress uk; |
| 2385 | |
| 2386 | memset(&uk, 0, sizeof(uk)); |
| 2387 | uk.family = k->family; |
| 2388 | uk.reserved = k->reserved; |
| 2389 | memcpy(&uk.local, &k->local, sizeof(uk.local)); |
Arnaud Ebalard | a1caa32 | 2008-11-03 01:30:23 -0800 | [diff] [blame] | 2390 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2391 | |
| 2392 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); |
| 2393 | } |
| 2394 | |
| 2395 | 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] | 2396 | { |
| 2397 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2398 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
| 2399 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) |
| 2400 | + userpolicy_type_attrsize(); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2401 | } |
| 2402 | |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2403 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
| 2404 | int num_migrate, const struct xfrm_kmaddress *k, |
| 2405 | const struct xfrm_selector *sel, u8 dir, u8 type) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2406 | { |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2407 | const struct xfrm_migrate *mp; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2408 | struct xfrm_userpolicy_id *pol_id; |
| 2409 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2410 | int i, err; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2411 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2412 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
| 2413 | if (nlh == NULL) |
| 2414 | return -EMSGSIZE; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2415 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2416 | pol_id = nlmsg_data(nlh); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2417 | /* copy data from selector, dir, and type to the pol_id */ |
| 2418 | memset(pol_id, 0, sizeof(*pol_id)); |
| 2419 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); |
| 2420 | pol_id->dir = dir; |
| 2421 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2422 | if (k != NULL) { |
| 2423 | err = copy_to_user_kmaddress(k, skb); |
| 2424 | if (err) |
| 2425 | goto out_cancel; |
| 2426 | } |
| 2427 | err = copy_to_user_policy_type(type, skb); |
| 2428 | if (err) |
| 2429 | goto out_cancel; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2430 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2431 | err = copy_to_user_migrate(mp, skb); |
| 2432 | if (err) |
| 2433 | goto out_cancel; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2434 | } |
| 2435 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2436 | nlmsg_end(skb, nlh); |
| 2437 | return 0; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2438 | |
| 2439 | out_cancel: |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2440 | nlmsg_cancel(skb, nlh); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2441 | return err; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2442 | } |
| 2443 | |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2444 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
| 2445 | const struct xfrm_migrate *m, int num_migrate, |
| 2446 | const struct xfrm_kmaddress *k) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2447 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2448 | struct net *net = &init_net; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2449 | struct sk_buff *skb; |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2450 | |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2451 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2452 | if (skb == NULL) |
| 2453 | return -ENOMEM; |
| 2454 | |
| 2455 | /* build migrate */ |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2456 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2457 | BUG(); |
| 2458 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2459 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2460 | } |
| 2461 | #else |
David S. Miller | 183cad1 | 2011-02-24 00:28:01 -0500 | [diff] [blame] | 2462 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
| 2463 | const struct xfrm_migrate *m, int num_migrate, |
| 2464 | const struct xfrm_kmaddress *k) |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2465 | { |
| 2466 | return -ENOPROTOOPT; |
| 2467 | } |
| 2468 | #endif |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2469 | |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2470 | #define XMSGSIZE(type) sizeof(struct type) |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2471 | |
| 2472 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { |
David S. Miller | 66f9a25 | 2009-01-20 09:49:51 -0800 | [diff] [blame] | 2473 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2474 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
| 2475 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
| 2476 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
| 2477 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
| 2478 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
| 2479 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2480 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2481 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2482 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
David S. Miller | 66f9a25 | 2009-01-20 09:49:51 -0800 | [diff] [blame] | 2483 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2484 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2485 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2486 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2487 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
| 2488 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 2489 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2490 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2491 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 2492 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2493 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | }; |
| 2495 | |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2496 | #undef XMSGSIZE |
| 2497 | |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2498 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
jamal | c28e930 | 2010-02-09 03:59:38 +0000 | [diff] [blame] | 2499 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
| 2500 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, |
| 2501 | [XFRMA_LASTUSED] = { .type = NLA_U64}, |
| 2502 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 2503 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2504 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
| 2505 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, |
| 2506 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, |
| 2507 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, |
| 2508 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, |
| 2509 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, |
| 2510 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, |
| 2511 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, |
| 2512 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, |
| 2513 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, |
| 2514 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, |
| 2515 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, |
| 2516 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, |
| 2517 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, |
Arnaud Ebalard | 13c1d18 | 2008-10-05 13:33:42 -0700 | [diff] [blame] | 2518 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2519 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 2520 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2521 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
Nicolas Dichtel | a947b0a | 2013-02-22 10:54:54 +0100 | [diff] [blame] | 2522 | [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, |
Nicolas Dichtel | d362309 | 2014-02-14 15:30:36 +0100 | [diff] [blame] | 2523 | [XFRMA_PROTO] = { .type = NLA_U8 }, |
Nicolas Dichtel | 870a2df | 2014-03-06 18:24:29 +0100 | [diff] [blame] | 2524 | [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 2525 | [XFRMA_SET_MARK] = { .type = NLA_U32 }, |
| 2526 | [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 }, |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2527 | [XFRMA_IF_ID] = { .type = NLA_U32 }, |
Thomas Graf | cf5cb79 | 2007-08-22 13:59:04 -0700 | [diff] [blame] | 2528 | }; |
| 2529 | |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 2530 | static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = { |
| 2531 | [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, |
| 2532 | [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) }, |
| 2533 | }; |
| 2534 | |
Mathias Krause | 05600a7 | 2013-02-24 14:10:27 +0100 | [diff] [blame] | 2535 | static const struct xfrm_link { |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2536 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 2537 | int (*start)(struct netlink_callback *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2539 | int (*done)(struct netlink_callback *); |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 2540 | const struct nla_policy *nla_pol; |
| 2541 | int nla_max; |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2542 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
| 2543 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, |
| 2544 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, |
| 2545 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2546 | .dump = xfrm_dump_sa, |
| 2547 | .done = xfrm_dump_sa_done }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2548 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
| 2549 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, |
| 2550 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 2551 | .start = xfrm_dump_policy_start, |
Timo Teras | 4c563f7 | 2008-02-28 21:31:08 -0800 | [diff] [blame] | 2552 | .dump = xfrm_dump_policy, |
| 2553 | .done = xfrm_dump_policy_done }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2554 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
Jamal Hadi Salim | 980ebd2 | 2006-03-20 19:16:40 -0800 | [diff] [blame] | 2555 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
Jamal Hadi Salim | 53bc6b4 | 2006-03-20 19:17:03 -0800 | [diff] [blame] | 2556 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2557 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
| 2558 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, |
Jamal Hadi Salim | 6c5c8ca | 2006-03-20 19:17:25 -0800 | [diff] [blame] | 2559 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2560 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
| 2561 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2562 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
| 2563 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 2564 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
Jamal Hadi Salim | 566ec03 | 2007-04-26 14:12:15 -0700 | [diff] [blame] | 2565 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 2566 | [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo, |
| 2567 | .nla_pol = xfrma_spd_policy, |
| 2568 | .nla_max = XFRMA_SPD_MAX }, |
Jamal Hadi Salim | ecfd6b1 | 2007-04-28 21:20:32 -0700 | [diff] [blame] | 2569 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | }; |
| 2571 | |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2572 | 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] | 2573 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2574 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 35a7aa0 | 2007-08-22 14:00:40 -0700 | [diff] [blame] | 2575 | struct nlattr *attrs[XFRMA_MAX+1]; |
Mathias Krause | 05600a7 | 2013-02-24 14:10:27 +0100 | [diff] [blame] | 2576 | const struct xfrm_link *link; |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2577 | int type, err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | type = nlh->nlmsg_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | if (type > XFRM_MSG_MAX) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2581 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | |
| 2583 | type -= XFRM_MSG_BASE; |
| 2584 | link = &xfrm_dispatch[type]; |
| 2585 | |
| 2586 | /* All operations require privileges, even GET */ |
Eric W. Biederman | 90f62cf | 2014-04-23 14:29:27 -0700 | [diff] [blame] | 2587 | if (!netlink_net_capable(skb, CAP_NET_ADMIN)) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2588 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | |
Thomas Graf | 492b558 | 2005-05-03 14:26:40 -0700 | [diff] [blame] | 2590 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
| 2591 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 2592 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | if (link->dump == NULL) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2594 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 2596 | { |
| 2597 | struct netlink_dump_control c = { |
Herbert Xu | 543aabb | 2017-10-19 20:51:10 +0800 | [diff] [blame] | 2598 | .start = link->start, |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 2599 | .dump = link->dump, |
| 2600 | .done = link->done, |
| 2601 | }; |
| 2602 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); |
| 2603 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | } |
| 2605 | |
Christophe Gouault | 880a6fa | 2014-08-29 16:16:05 +0200 | [diff] [blame] | 2606 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, |
| 2607 | link->nla_max ? : XFRMA_MAX, |
| 2608 | link->nla_pol ? : xfrma_policy); |
Thomas Graf | a7bd9a4 | 2007-08-22 13:58:18 -0700 | [diff] [blame] | 2609 | if (err < 0) |
| 2610 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | |
| 2612 | if (link->doit == NULL) |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 2613 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | |
Thomas Graf | 5424f32 | 2007-08-22 14:01:33 -0700 | [diff] [blame] | 2615 | return link->doit(skb, nlh, attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | } |
| 2617 | |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 2618 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | { |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 2620 | struct net *net = sock_net(skb->sk); |
| 2621 | |
| 2622 | mutex_lock(&net->xfrm.xfrm_cfg_mutex); |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 2623 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); |
Fan Du | 283bc9f | 2013-11-07 17:47:50 +0800 | [diff] [blame] | 2624 | mutex_unlock(&net->xfrm.xfrm_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | } |
| 2626 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2627 | static inline size_t xfrm_expire_msgsize(void) |
| 2628 | { |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2629 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
| 2630 | + nla_total_size(sizeof(struct xfrm_mark)); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2631 | } |
| 2632 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2633 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | { |
| 2635 | struct xfrm_user_expire *ue; |
| 2636 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2637 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2639 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2640 | if (nlh == NULL) |
| 2641 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2643 | ue = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | copy_to_user_state(x, &ue->state); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2645 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2647 | err = xfrm_mark_put(skb, &x->mark); |
| 2648 | if (err) |
| 2649 | return err; |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2650 | |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2651 | err = xfrm_if_id_put(skb, x->if_id); |
| 2652 | if (err) |
| 2653 | return err; |
| 2654 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2655 | nlmsg_end(skb, nlh); |
| 2656 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2657 | } |
| 2658 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2659 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2661 | struct net *net = xs_net(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | struct sk_buff *skb; |
| 2663 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2664 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | if (skb == NULL) |
| 2666 | return -ENOMEM; |
| 2667 | |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2668 | if (build_expire(skb, x, c) < 0) { |
| 2669 | kfree_skb(skb); |
| 2670 | return -EMSGSIZE; |
| 2671 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2672 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2673 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | } |
| 2675 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2676 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2677 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2678 | struct net *net = xs_net(x); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2679 | struct sk_buff *skb; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2680 | |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2681 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2682 | if (skb == NULL) |
| 2683 | return -ENOMEM; |
| 2684 | |
| 2685 | if (build_aevent(skb, x, c) < 0) |
| 2686 | BUG(); |
| 2687 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2688 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2689 | } |
| 2690 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2691 | static int xfrm_notify_sa_flush(const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2692 | { |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 2693 | struct net *net = c->net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2694 | struct xfrm_usersa_flush *p; |
| 2695 | struct nlmsghdr *nlh; |
| 2696 | struct sk_buff *skb; |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2697 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2698 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2699 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2700 | if (skb == NULL) |
| 2701 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2702 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2703 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2704 | if (nlh == NULL) { |
| 2705 | kfree_skb(skb); |
| 2706 | return -EMSGSIZE; |
| 2707 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2708 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2709 | p = nlmsg_data(nlh); |
Herbert Xu | bf08867 | 2005-06-18 22:44:00 -0700 | [diff] [blame] | 2710 | p->proto = c->data.proto; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2711 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2712 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2713 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2714 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2715 | } |
| 2716 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2717 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2718 | { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2719 | size_t l = 0; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 2720 | if (x->aead) |
| 2721 | l += nla_total_size(aead_len(x->aead)); |
Martin Willi | 4447bb3 | 2009-11-25 00:29:52 +0000 | [diff] [blame] | 2722 | if (x->aalg) { |
| 2723 | l += nla_total_size(sizeof(struct xfrm_algo) + |
| 2724 | (x->aalg->alg_key_len + 7) / 8); |
| 2725 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); |
| 2726 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2727 | if (x->ealg) |
Eric Dumazet | 0f99be0 | 2008-01-08 23:39:06 -0800 | [diff] [blame] | 2728 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2729 | if (x->calg) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2730 | l += nla_total_size(sizeof(*x->calg)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2731 | if (x->encap) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2732 | l += nla_total_size(sizeof(*x->encap)); |
Martin Willi | 35d2856 | 2010-12-08 04:37:49 +0000 | [diff] [blame] | 2733 | if (x->tfcpad) |
| 2734 | l += nla_total_size(sizeof(x->tfcpad)); |
Steffen Klassert | d8647b7 | 2011-03-08 00:10:27 +0000 | [diff] [blame] | 2735 | if (x->replay_esn) |
| 2736 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); |
dingzhi | f293a5e | 2014-10-30 09:39:36 +0100 | [diff] [blame] | 2737 | else |
| 2738 | l += nla_total_size(sizeof(struct xfrm_replay_state)); |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 2739 | if (x->security) |
| 2740 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + |
| 2741 | x->security->ctx_len); |
| 2742 | if (x->coaddr) |
| 2743 | l += nla_total_size(sizeof(*x->coaddr)); |
Nicolas Dichtel | a947b0a | 2013-02-22 10:54:54 +0100 | [diff] [blame] | 2744 | if (x->props.extra_flags) |
| 2745 | l += nla_total_size(sizeof(x->props.extra_flags)); |
Steffen Klassert | 78f10c5 | 2018-06-12 12:44:26 +0200 | [diff] [blame] | 2746 | if (x->props.smark.v | x->props.smark.m) { |
| 2747 | l += nla_total_size(sizeof(x->props.smark.v)); |
| 2748 | l += nla_total_size(sizeof(x->props.smark.m)); |
| 2749 | } |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2750 | if (x->if_id) |
| 2751 | l += nla_total_size(sizeof(x->if_id)); |
Herbert Xu | 68325d3 | 2007-10-09 13:30:57 -0700 | [diff] [blame] | 2752 | |
Herbert Xu | d26f398 | 2007-11-13 21:47:08 -0800 | [diff] [blame] | 2753 | /* Must count x->lastused as it may become non-zero behind our back. */ |
Nicolas Dichtel | de95c4a | 2016-04-22 17:31:23 +0200 | [diff] [blame] | 2754 | l += nla_total_size_64bit(sizeof(u64)); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2755 | |
| 2756 | return l; |
| 2757 | } |
| 2758 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2759 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2760 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2761 | struct net *net = xs_net(x); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2762 | struct xfrm_usersa_info *p; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2763 | struct xfrm_usersa_id *id; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2764 | struct nlmsghdr *nlh; |
| 2765 | struct sk_buff *skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2766 | int len = xfrm_sa_len(x); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2767 | int headlen, err; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2768 | |
| 2769 | headlen = sizeof(*p); |
| 2770 | if (c->event == XFRM_MSG_DELSA) { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2771 | len += nla_total_size(headlen); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2772 | headlen = sizeof(*id); |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2773 | len += nla_total_size(sizeof(struct xfrm_mark)); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2774 | } |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2775 | len += NLMSG_ALIGN(headlen); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2776 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2777 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2778 | if (skb == NULL) |
| 2779 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2780 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2781 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2782 | err = -EMSGSIZE; |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2783 | if (nlh == NULL) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2784 | goto out_free_skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2785 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2786 | p = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2787 | if (c->event == XFRM_MSG_DELSA) { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2788 | struct nlattr *attr; |
| 2789 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2790 | id = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2791 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
| 2792 | id->spi = x->id.spi; |
| 2793 | id->family = x->props.family; |
| 2794 | id->proto = x->id.proto; |
| 2795 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2796 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2797 | err = -EMSGSIZE; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2798 | if (attr == NULL) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2799 | goto out_free_skb; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 2800 | |
| 2801 | p = nla_data(attr); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 2802 | } |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2803 | err = copy_to_user_state_extra(x, p, skb); |
| 2804 | if (err) |
| 2805 | goto out_free_skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2806 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 2807 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2808 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2809 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2810 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2811 | out_free_skb: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2812 | kfree_skb(skb); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2813 | return err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2814 | } |
| 2815 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2816 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2817 | { |
| 2818 | |
| 2819 | switch (c->event) { |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2820 | case XFRM_MSG_EXPIRE: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2821 | return xfrm_exp_state_notify(x, c); |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2822 | case XFRM_MSG_NEWAE: |
| 2823 | return xfrm_aevent_state_notify(x, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2824 | case XFRM_MSG_DELSA: |
| 2825 | case XFRM_MSG_UPDSA: |
| 2826 | case XFRM_MSG_NEWSA: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2827 | return xfrm_notify_sa(x, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 2828 | case XFRM_MSG_FLUSHSA: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2829 | return xfrm_notify_sa_flush(c); |
| 2830 | default: |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 2831 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
| 2832 | c->event); |
| 2833 | break; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 2834 | } |
| 2835 | |
| 2836 | return 0; |
| 2837 | |
| 2838 | } |
| 2839 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2840 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
| 2841 | struct xfrm_policy *xp) |
| 2842 | { |
| 2843 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) |
| 2844 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) |
Jamal Hadi Salim | 6f26b61 | 2010-02-22 11:32:59 +0000 | [diff] [blame] | 2845 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2846 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
| 2847 | + userpolicy_type_attrsize(); |
| 2848 | } |
| 2849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
Fan Du | 65e0736 | 2012-08-15 10:13:47 +0800 | [diff] [blame] | 2851 | struct xfrm_tmpl *xt, struct xfrm_policy *xp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2853 | __u32 seq = xfrm_get_acqseq(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2854 | struct xfrm_user_acquire *ua; |
| 2855 | struct nlmsghdr *nlh; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2856 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2858 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
| 2859 | if (nlh == NULL) |
| 2860 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2862 | ua = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
| 2864 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); |
| 2865 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); |
Fan Du | 65e0736 | 2012-08-15 10:13:47 +0800 | [diff] [blame] | 2866 | copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | ua->aalgos = xt->aalgos; |
| 2868 | ua->ealgos = xt->ealgos; |
| 2869 | ua->calgos = xt->calgos; |
| 2870 | ua->seq = x->km.seq = seq; |
| 2871 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2872 | err = copy_to_user_tmpl(xp, skb); |
| 2873 | if (!err) |
| 2874 | err = copy_to_user_state_sec_ctx(x, skb); |
| 2875 | if (!err) |
| 2876 | err = copy_to_user_policy_type(xp->type, skb); |
| 2877 | if (!err) |
| 2878 | err = xfrm_mark_put(skb, &xp->mark); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2879 | if (!err) |
| 2880 | err = xfrm_if_id_put(skb, xp->if_id); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2881 | if (err) { |
| 2882 | nlmsg_cancel(skb, nlh); |
| 2883 | return err; |
| 2884 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 2886 | nlmsg_end(skb, nlh); |
| 2887 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | } |
| 2889 | |
| 2890 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, |
Fan Du | 65e0736 | 2012-08-15 10:13:47 +0800 | [diff] [blame] | 2891 | struct xfrm_policy *xp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2892 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 2893 | struct net *net = xs_net(x); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2894 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2896 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | if (skb == NULL) |
| 2898 | return -ENOMEM; |
| 2899 | |
Fan Du | 65e0736 | 2012-08-15 10:13:47 +0800 | [diff] [blame] | 2900 | if (build_acquire(skb, x, xt, xp) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | BUG(); |
| 2902 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 2903 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2904 | } |
| 2905 | |
| 2906 | /* User gives us xfrm_user_policy_info followed by an array of 0 |
| 2907 | * or more templates. |
| 2908 | */ |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 2909 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | u8 *data, int len, int *dir) |
| 2911 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 2912 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2913 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
| 2914 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); |
| 2915 | struct xfrm_policy *xp; |
| 2916 | int nr; |
| 2917 | |
Venkat Yekkirala | cb969f0 | 2006-07-24 23:32:20 -0700 | [diff] [blame] | 2918 | switch (sk->sk_family) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | case AF_INET: |
| 2920 | if (opt != IP_XFRM_POLICY) { |
| 2921 | *dir = -EOPNOTSUPP; |
| 2922 | return NULL; |
| 2923 | } |
| 2924 | break; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 2925 | #if IS_ENABLED(CONFIG_IPV6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | case AF_INET6: |
| 2927 | if (opt != IPV6_XFRM_POLICY) { |
| 2928 | *dir = -EOPNOTSUPP; |
| 2929 | return NULL; |
| 2930 | } |
| 2931 | break; |
| 2932 | #endif |
| 2933 | default: |
| 2934 | *dir = -EINVAL; |
| 2935 | return NULL; |
| 2936 | } |
| 2937 | |
| 2938 | *dir = -EINVAL; |
| 2939 | |
| 2940 | if (len < sizeof(*p) || |
| 2941 | verify_newpolicy_info(p)) |
| 2942 | return NULL; |
| 2943 | |
| 2944 | nr = ((len - sizeof(*p)) / sizeof(*ut)); |
David S. Miller | b4ad86bf | 2006-12-03 19:19:26 -0800 | [diff] [blame] | 2945 | if (validate_tmpl(nr, ut, p->sel.family)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2946 | return NULL; |
| 2947 | |
Herbert Xu | a4f1bac | 2005-07-26 15:43:17 -0700 | [diff] [blame] | 2948 | if (p->dir > XFRM_POLICY_OUT) |
| 2949 | return NULL; |
| 2950 | |
Herbert Xu | 2f09a4d | 2010-08-14 22:38:09 -0700 | [diff] [blame] | 2951 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2952 | if (xp == NULL) { |
| 2953 | *dir = -ENOBUFS; |
| 2954 | return NULL; |
| 2955 | } |
| 2956 | |
| 2957 | copy_from_user_policy(xp, p); |
Masahide NAKAMURA | f7b6983 | 2006-08-23 22:49:28 -0700 | [diff] [blame] | 2958 | xp->type = XFRM_POLICY_TYPE_MAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | copy_templates(xp, ut, nr); |
| 2960 | |
| 2961 | *dir = p->dir; |
| 2962 | |
| 2963 | return xp; |
| 2964 | } |
| 2965 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2966 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
| 2967 | { |
| 2968 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) |
| 2969 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) |
| 2970 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 2971 | + nla_total_size(sizeof(struct xfrm_mark)) |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 2972 | + userpolicy_type_attrsize(); |
| 2973 | } |
| 2974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 2976 | int dir, const struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | { |
| 2978 | struct xfrm_user_polexpire *upe; |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 2979 | int hard = c->data.hard; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2980 | struct nlmsghdr *nlh; |
| 2981 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2983 | nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 2984 | if (nlh == NULL) |
| 2985 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 2987 | upe = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | copy_to_user_policy(xp, &upe->pol, dir); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2989 | err = copy_to_user_tmpl(xp, skb); |
| 2990 | if (!err) |
| 2991 | err = copy_to_user_sec_ctx(xp, skb); |
| 2992 | if (!err) |
| 2993 | err = copy_to_user_policy_type(xp->type, skb); |
| 2994 | if (!err) |
| 2995 | err = xfrm_mark_put(skb, &xp->mark); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 2996 | if (!err) |
| 2997 | err = xfrm_if_id_put(skb, xp->if_id); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 2998 | if (err) { |
| 2999 | nlmsg_cancel(skb, nlh); |
| 3000 | return err; |
| 3001 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3002 | upe->hard = !!hard; |
| 3003 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3004 | nlmsg_end(skb, nlh); |
| 3005 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | } |
| 3007 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 3008 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | { |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 3010 | struct net *net = xp_net(xp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3013 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | if (skb == NULL) |
| 3015 | return -ENOMEM; |
| 3016 | |
Jamal Hadi Salim | d51d081 | 2006-03-20 19:16:12 -0800 | [diff] [blame] | 3017 | if (build_polexpire(skb, xp, dir, c) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | BUG(); |
| 3019 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 3020 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3021 | } |
| 3022 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 3023 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3024 | { |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3025 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
Alexey Dobriyan | fc34acd | 2008-11-25 17:50:08 -0800 | [diff] [blame] | 3026 | struct net *net = xp_net(xp); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3027 | struct xfrm_userpolicy_info *p; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3028 | struct xfrm_userpolicy_id *id; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3029 | struct nlmsghdr *nlh; |
| 3030 | struct sk_buff *skb; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3031 | int headlen, err; |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3032 | |
| 3033 | headlen = sizeof(*p); |
| 3034 | if (c->event == XFRM_MSG_DELPOLICY) { |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3035 | len += nla_total_size(headlen); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3036 | headlen = sizeof(*id); |
| 3037 | } |
Thomas Graf | cfbfd45 | 2007-08-22 13:57:04 -0700 | [diff] [blame] | 3038 | len += userpolicy_type_attrsize(); |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 3039 | len += nla_total_size(sizeof(struct xfrm_mark)); |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3040 | len += NLMSG_ALIGN(headlen); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3041 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3042 | skb = nlmsg_new(len, GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3043 | if (skb == NULL) |
| 3044 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3045 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3046 | nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3047 | err = -EMSGSIZE; |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 3048 | if (nlh == NULL) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3049 | goto out_free_skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3050 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 3051 | p = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3052 | if (c->event == XFRM_MSG_DELPOLICY) { |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 3053 | struct nlattr *attr; |
| 3054 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 3055 | id = nlmsg_data(nlh); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3056 | memset(id, 0, sizeof(*id)); |
| 3057 | id->dir = dir; |
| 3058 | if (c->data.byid) |
| 3059 | id->index = xp->index; |
| 3060 | else |
| 3061 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); |
| 3062 | |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 3063 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3064 | err = -EMSGSIZE; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 3065 | if (attr == NULL) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3066 | goto out_free_skb; |
Thomas Graf | c0144be | 2007-08-22 13:55:43 -0700 | [diff] [blame] | 3067 | |
| 3068 | p = nla_data(attr); |
Herbert Xu | 0603eac | 2005-06-18 22:54:36 -0700 | [diff] [blame] | 3069 | } |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3070 | |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3071 | copy_to_user_policy(xp, p, dir); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3072 | err = copy_to_user_tmpl(xp, skb); |
| 3073 | if (!err) |
| 3074 | err = copy_to_user_policy_type(xp->type, skb); |
| 3075 | if (!err) |
| 3076 | err = xfrm_mark_put(skb, &xp->mark); |
Steffen Klassert | a80f560 | 2018-06-12 14:07:07 +0200 | [diff] [blame] | 3077 | if (!err) |
| 3078 | err = xfrm_if_id_put(skb, xp->if_id); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3079 | if (err) |
| 3080 | goto out_free_skb; |
Jamal Hadi Salim | 295fae5 | 2010-02-22 11:33:00 +0000 | [diff] [blame] | 3081 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 3082 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3083 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 3084 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3085 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3086 | out_free_skb: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3087 | kfree_skb(skb); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3088 | return err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3089 | } |
| 3090 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 3091 | static int xfrm_notify_policy_flush(const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3092 | { |
Alexey Dobriyan | 7067802 | 2008-11-25 17:50:36 -0800 | [diff] [blame] | 3093 | struct net *net = c->net; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3094 | struct nlmsghdr *nlh; |
| 3095 | struct sk_buff *skb; |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3096 | int err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3097 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3098 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3099 | if (skb == NULL) |
| 3100 | return -ENOMEM; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3101 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3102 | nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3103 | err = -EMSGSIZE; |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 3104 | if (nlh == NULL) |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3105 | goto out_free_skb; |
| 3106 | err = copy_to_user_policy_type(c->data.type, skb); |
| 3107 | if (err) |
| 3108 | goto out_free_skb; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3109 | |
Thomas Graf | 9825069 | 2007-08-22 12:47:26 -0700 | [diff] [blame] | 3110 | nlmsg_end(skb, nlh); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3111 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 3112 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3113 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3114 | out_free_skb: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3115 | kfree_skb(skb); |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3116 | return err; |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3117 | } |
| 3118 | |
David S. Miller | 214e005 | 2011-02-24 00:02:38 -0500 | [diff] [blame] | 3119 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3120 | { |
| 3121 | |
| 3122 | switch (c->event) { |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 3123 | case XFRM_MSG_NEWPOLICY: |
| 3124 | case XFRM_MSG_UPDPOLICY: |
| 3125 | case XFRM_MSG_DELPOLICY: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3126 | return xfrm_notify_policy(xp, dir, c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 3127 | case XFRM_MSG_FLUSHPOLICY: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3128 | return xfrm_notify_policy_flush(c); |
Herbert Xu | f60f6b8 | 2005-06-18 22:44:37 -0700 | [diff] [blame] | 3129 | case XFRM_MSG_POLEXPIRE: |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3130 | return xfrm_exp_policy_notify(xp, dir, c); |
| 3131 | default: |
stephen hemminger | 62db5cf | 2010-05-12 06:37:06 +0000 | [diff] [blame] | 3132 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
| 3133 | c->event); |
Jamal Hadi Salim | 26b15da | 2005-06-18 22:42:13 -0700 | [diff] [blame] | 3134 | } |
| 3135 | |
| 3136 | return 0; |
| 3137 | |
| 3138 | } |
| 3139 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3140 | static inline size_t xfrm_report_msgsize(void) |
| 3141 | { |
| 3142 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); |
| 3143 | } |
| 3144 | |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3145 | static int build_report(struct sk_buff *skb, u8 proto, |
| 3146 | struct xfrm_selector *sel, xfrm_address_t *addr) |
| 3147 | { |
| 3148 | struct xfrm_user_report *ur; |
| 3149 | struct nlmsghdr *nlh; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3150 | |
Thomas Graf | 79b8b7f | 2007-08-22 12:46:53 -0700 | [diff] [blame] | 3151 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
| 3152 | if (nlh == NULL) |
| 3153 | return -EMSGSIZE; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3154 | |
Thomas Graf | 7b67c85 | 2007-08-22 13:53:52 -0700 | [diff] [blame] | 3155 | ur = nlmsg_data(nlh); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3156 | ur->proto = proto; |
| 3157 | memcpy(&ur->sel, sel, sizeof(ur->sel)); |
| 3158 | |
David S. Miller | 1d1e34d | 2012-06-27 21:57:03 -0700 | [diff] [blame] | 3159 | if (addr) { |
| 3160 | int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); |
| 3161 | if (err) { |
| 3162 | nlmsg_cancel(skb, nlh); |
| 3163 | return err; |
| 3164 | } |
| 3165 | } |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3166 | nlmsg_end(skb, nlh); |
| 3167 | return 0; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3168 | } |
| 3169 | |
Alexey Dobriyan | db983c1 | 2008-11-25 17:51:01 -0800 | [diff] [blame] | 3170 | static int xfrm_send_report(struct net *net, u8 proto, |
| 3171 | struct xfrm_selector *sel, xfrm_address_t *addr) |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3172 | { |
| 3173 | struct sk_buff *skb; |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3174 | |
Thomas Graf | 7deb226 | 2007-08-22 13:57:39 -0700 | [diff] [blame] | 3175 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3176 | if (skb == NULL) |
| 3177 | return -ENOMEM; |
| 3178 | |
| 3179 | if (build_report(skb, proto, sel, addr) < 0) |
| 3180 | BUG(); |
| 3181 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 3182 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3183 | } |
| 3184 | |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 3185 | static inline size_t xfrm_mapping_msgsize(void) |
| 3186 | { |
| 3187 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); |
| 3188 | } |
| 3189 | |
| 3190 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, |
| 3191 | xfrm_address_t *new_saddr, __be16 new_sport) |
| 3192 | { |
| 3193 | struct xfrm_user_mapping *um; |
| 3194 | struct nlmsghdr *nlh; |
| 3195 | |
| 3196 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); |
| 3197 | if (nlh == NULL) |
| 3198 | return -EMSGSIZE; |
| 3199 | |
| 3200 | um = nlmsg_data(nlh); |
| 3201 | |
| 3202 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); |
| 3203 | um->id.spi = x->id.spi; |
| 3204 | um->id.family = x->props.family; |
| 3205 | um->id.proto = x->id.proto; |
| 3206 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); |
| 3207 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); |
| 3208 | um->new_sport = new_sport; |
| 3209 | um->old_sport = x->encap->encap_sport; |
| 3210 | um->reqid = x->props.reqid; |
| 3211 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 3212 | nlmsg_end(skb, nlh); |
| 3213 | return 0; |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 3214 | } |
| 3215 | |
| 3216 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, |
| 3217 | __be16 sport) |
| 3218 | { |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3219 | struct net *net = xs_net(x); |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 3220 | struct sk_buff *skb; |
| 3221 | |
| 3222 | if (x->id.proto != IPPROTO_ESP) |
| 3223 | return -EINVAL; |
| 3224 | |
| 3225 | if (!x->encap) |
| 3226 | return -EINVAL; |
| 3227 | |
| 3228 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); |
| 3229 | if (skb == NULL) |
| 3230 | return -ENOMEM; |
| 3231 | |
| 3232 | if (build_mapping(skb, x, ipaddr, sport) < 0) |
| 3233 | BUG(); |
| 3234 | |
Michal Kubecek | 21ee543 | 2014-06-03 10:26:06 +0200 | [diff] [blame] | 3235 | return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 3236 | } |
| 3237 | |
Horia Geanta | 0f24558 | 2014-02-12 16:20:06 +0200 | [diff] [blame] | 3238 | static bool xfrm_is_alive(const struct km_event *c) |
| 3239 | { |
| 3240 | return (bool)xfrm_acquire_is_on(c->net); |
| 3241 | } |
| 3242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | static struct xfrm_mgr netlink_mgr = { |
| 3244 | .id = "netlink", |
| 3245 | .notify = xfrm_send_state_notify, |
| 3246 | .acquire = xfrm_send_acquire, |
| 3247 | .compile_policy = xfrm_compile_policy, |
| 3248 | .notify_policy = xfrm_send_policy_notify, |
Masahide NAKAMURA | 97a64b4 | 2006-08-23 20:44:06 -0700 | [diff] [blame] | 3249 | .report = xfrm_send_report, |
Shinta Sugimoto | 5c79de6 | 2007-02-08 13:12:32 -0800 | [diff] [blame] | 3250 | .migrate = xfrm_send_migrate, |
Martin Willi | 3a2dfbe | 2008-10-28 16:01:07 -0700 | [diff] [blame] | 3251 | .new_mapping = xfrm_send_mapping, |
Horia Geanta | 0f24558 | 2014-02-12 16:20:06 +0200 | [diff] [blame] | 3252 | .is_alive = xfrm_is_alive, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | }; |
| 3254 | |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3255 | static int __net_init xfrm_user_net_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | { |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 3257 | struct sock *nlsk; |
Pablo Neira Ayuso | a31f2d1 | 2012-06-29 06:15:21 +0000 | [diff] [blame] | 3258 | struct netlink_kernel_cfg cfg = { |
| 3259 | .groups = XFRMNLGRP_MAX, |
| 3260 | .input = xfrm_netlink_rcv, |
| 3261 | }; |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 3262 | |
Pablo Neira Ayuso | 9f00d97 | 2012-09-08 02:53:54 +0000 | [diff] [blame] | 3263 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); |
Patrick McHardy | be33690 | 2006-03-20 22:40:54 -0800 | [diff] [blame] | 3264 | if (nlsk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3265 | return -ENOMEM; |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 3266 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 3267 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3268 | return 0; |
| 3269 | } |
| 3270 | |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 3271 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3272 | { |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 3273 | struct net *net; |
| 3274 | list_for_each_entry(net, net_exit_list, exit_list) |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 3275 | RCU_INIT_POINTER(net->xfrm.nlsk, NULL); |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 3276 | synchronize_net(); |
| 3277 | list_for_each_entry(net, net_exit_list, exit_list) |
| 3278 | netlink_kernel_release(net->xfrm.nlsk_stash); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3279 | } |
| 3280 | |
| 3281 | static struct pernet_operations xfrm_user_net_ops = { |
Eric W. Biederman | d79d792 | 2009-12-03 02:29:05 +0000 | [diff] [blame] | 3282 | .init = xfrm_user_net_init, |
| 3283 | .exit_batch = xfrm_user_net_exit, |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3284 | }; |
| 3285 | |
| 3286 | static int __init xfrm_user_init(void) |
| 3287 | { |
| 3288 | int rv; |
| 3289 | |
| 3290 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
| 3291 | |
| 3292 | rv = register_pernet_subsys(&xfrm_user_net_ops); |
| 3293 | if (rv < 0) |
| 3294 | return rv; |
| 3295 | rv = xfrm_register_km(&netlink_mgr); |
| 3296 | if (rv < 0) |
| 3297 | unregister_pernet_subsys(&xfrm_user_net_ops); |
| 3298 | return rv; |
| 3299 | } |
| 3300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3301 | static void __exit xfrm_user_exit(void) |
| 3302 | { |
| 3303 | xfrm_unregister_km(&netlink_mgr); |
Alexey Dobriyan | a6483b7 | 2008-11-25 17:38:20 -0800 | [diff] [blame] | 3304 | unregister_pernet_subsys(&xfrm_user_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3305 | } |
| 3306 | |
| 3307 | module_init(xfrm_user_init); |
| 3308 | module_exit(xfrm_user_exit); |
| 3309 | MODULE_LICENSE("GPL"); |
Harald Welte | 4fdb3bb | 2005-08-09 19:40:55 -0700 | [diff] [blame] | 3310 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
Jamal Hadi Salim | f8cd548 | 2006-03-20 19:15:11 -0800 | [diff] [blame] | 3311 | |