Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C)2003,2004 USAGI/WIDE Project |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 13 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * Authors Mitsuru KANDA <mk@linux-ipv6.org> |
| 19 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
| 20 | * |
| 21 | * Based on net/ipv4/xfrm4_tunnel.c |
| 22 | * |
| 23 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/xfrm.h> |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 26 | #include <linux/rculist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <net/ip.h> |
| 28 | #include <net/xfrm.h> |
| 29 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/ipv6.h> |
| 31 | #include <linux/icmpv6.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 32 | #include <linux/mutex.h> |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 33 | #include <net/netns/generic.h> |
| 34 | |
| 35 | #define XFRM6_TUNNEL_SPI_BYADDR_HSIZE 256 |
| 36 | #define XFRM6_TUNNEL_SPI_BYSPI_HSIZE 256 |
| 37 | |
| 38 | #define XFRM6_TUNNEL_SPI_MIN 1 |
| 39 | #define XFRM6_TUNNEL_SPI_MAX 0xffffffff |
| 40 | |
| 41 | struct xfrm6_tunnel_net { |
| 42 | struct hlist_head spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE]; |
| 43 | struct hlist_head spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE]; |
| 44 | u32 spi; |
| 45 | }; |
| 46 | |
| 47 | static int xfrm6_tunnel_net_id __read_mostly; |
| 48 | static inline struct xfrm6_tunnel_net *xfrm6_tunnel_pernet(struct net *net) |
| 49 | { |
| 50 | return net_generic(net, xfrm6_tunnel_net_id); |
| 51 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /* |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 54 | * xfrm_tunnel_spi things are for allocating unique id ("spi") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | * per xfrm_address_t. |
| 56 | */ |
| 57 | struct xfrm6_tunnel_spi { |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 58 | struct hlist_node list_byaddr; |
| 59 | struct hlist_node list_byspi; |
| 60 | xfrm_address_t addr; |
| 61 | u32 spi; |
| 62 | atomic_t refcnt; |
| 63 | struct rcu_head rcu_head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | }; |
| 65 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 66 | static DEFINE_SPINLOCK(xfrm6_tunnel_spi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 68 | static struct kmem_cache *xfrm6_tunnel_spi_kmem __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 70 | static inline unsigned xfrm6_tunnel_spi_hash_byaddr(xfrm_address_t *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
| 72 | unsigned h; |
| 73 | |
Al Viro | 8c689a6 | 2006-11-08 00:20:21 -0800 | [diff] [blame] | 74 | h = (__force u32)(addr->a6[0] ^ addr->a6[1] ^ addr->a6[2] ^ addr->a6[3]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | h ^= h >> 16; |
| 76 | h ^= h >> 8; |
| 77 | h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1; |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | return h; |
| 80 | } |
| 81 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 82 | static inline unsigned xfrm6_tunnel_spi_hash_byspi(u32 spi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE; |
| 85 | } |
| 86 | |
| 87 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 88 | static int __init xfrm6_tunnel_spi_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi", |
| 91 | sizeof(struct xfrm6_tunnel_spi), |
| 92 | 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 93 | NULL); |
David S. Miller | a922ba5 | 2006-07-24 13:49:06 -0700 | [diff] [blame] | 94 | if (!xfrm6_tunnel_spi_kmem) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void xfrm6_tunnel_spi_fini(void) |
| 100 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | kmem_cache_destroy(xfrm6_tunnel_spi_kmem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 104 | static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 106 | struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | struct xfrm6_tunnel_spi *x6spi; |
| 108 | struct hlist_node *pos; |
| 109 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 110 | hlist_for_each_entry_rcu(x6spi, pos, |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 111 | &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | list_byaddr) { |
David S. Miller | a922ba5 | 2006-07-24 13:49:06 -0700 | [diff] [blame] | 113 | if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return x6spi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | return NULL; |
| 118 | } |
| 119 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 120 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | { |
| 122 | struct xfrm6_tunnel_spi *x6spi; |
| 123 | u32 spi; |
| 124 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 125 | rcu_read_lock_bh(); |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 126 | x6spi = __xfrm6_tunnel_spi_lookup(net, saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | spi = x6spi ? x6spi->spi : 0; |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 128 | rcu_read_unlock_bh(); |
Al Viro | 5b12254 | 2006-11-01 15:28:58 -0800 | [diff] [blame] | 129 | return htonl(spi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | EXPORT_SYMBOL(xfrm6_tunnel_spi_lookup); |
| 133 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 134 | static int __xfrm6_tunnel_spi_check(struct net *net, u32 spi) |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 135 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 136 | struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 137 | struct xfrm6_tunnel_spi *x6spi; |
| 138 | int index = xfrm6_tunnel_spi_hash_byspi(spi); |
| 139 | struct hlist_node *pos; |
| 140 | |
| 141 | hlist_for_each_entry(x6spi, pos, |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 142 | &xfrm6_tn->spi_byspi[index], |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 143 | list_byspi) { |
| 144 | if (x6spi->spi == spi) |
| 145 | return -1; |
| 146 | } |
| 147 | return index; |
| 148 | } |
| 149 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 150 | static u32 __xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 152 | struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | u32 spi; |
| 154 | struct xfrm6_tunnel_spi *x6spi; |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 155 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 157 | if (xfrm6_tn->spi < XFRM6_TUNNEL_SPI_MIN || |
| 158 | xfrm6_tn->spi >= XFRM6_TUNNEL_SPI_MAX) |
| 159 | xfrm6_tn->spi = XFRM6_TUNNEL_SPI_MIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | else |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 161 | xfrm6_tn->spi++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 163 | for (spi = xfrm6_tn->spi; spi <= XFRM6_TUNNEL_SPI_MAX; spi++) { |
| 164 | index = __xfrm6_tunnel_spi_check(net, spi); |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 165 | if (index >= 0) |
| 166 | goto alloc_spi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 168 | for (spi = XFRM6_TUNNEL_SPI_MIN; spi < xfrm6_tn->spi; spi++) { |
| 169 | index = __xfrm6_tunnel_spi_check(net, spi); |
YOSHIFUJI Hideaki | df8ea19 | 2008-02-19 22:54:00 +0900 | [diff] [blame] | 170 | if (index >= 0) |
| 171 | goto alloc_spi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | spi = 0; |
| 174 | goto out; |
| 175 | alloc_spi: |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 176 | xfrm6_tn->spi = spi; |
Christoph Lameter | 54e6ecb | 2006-12-06 20:33:16 -0800 | [diff] [blame] | 177 | x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, GFP_ATOMIC); |
David S. Miller | a922ba5 | 2006-07-24 13:49:06 -0700 | [diff] [blame] | 178 | if (!x6spi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | goto out; |
David S. Miller | a922ba5 | 2006-07-24 13:49:06 -0700 | [diff] [blame] | 180 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 181 | INIT_RCU_HEAD(&x6spi->rcu_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr)); |
| 183 | x6spi->spi = spi; |
| 184 | atomic_set(&x6spi->refcnt, 1); |
| 185 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 186 | hlist_add_head_rcu(&x6spi->list_byspi, &xfrm6_tn->spi_byspi[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | index = xfrm6_tunnel_spi_hash_byaddr(saddr); |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 189 | hlist_add_head_rcu(&x6spi->list_byaddr, &xfrm6_tn->spi_byaddr[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return spi; |
| 192 | } |
| 193 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 194 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
| 196 | struct xfrm6_tunnel_spi *x6spi; |
| 197 | u32 spi; |
| 198 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 199 | spin_lock_bh(&xfrm6_tunnel_spi_lock); |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 200 | x6spi = __xfrm6_tunnel_spi_lookup(net, saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | if (x6spi) { |
| 202 | atomic_inc(&x6spi->refcnt); |
| 203 | spi = x6spi->spi; |
| 204 | } else |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 205 | spi = __xfrm6_tunnel_alloc_spi(net, saddr); |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 206 | spin_unlock_bh(&xfrm6_tunnel_spi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Al Viro | 5b12254 | 2006-11-01 15:28:58 -0800 | [diff] [blame] | 208 | return htonl(spi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | EXPORT_SYMBOL(xfrm6_tunnel_alloc_spi); |
| 212 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 213 | static void x6spi_destroy_rcu(struct rcu_head *head) |
| 214 | { |
| 215 | kmem_cache_free(xfrm6_tunnel_spi_kmem, |
| 216 | container_of(head, struct xfrm6_tunnel_spi, rcu_head)); |
| 217 | } |
| 218 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 219 | void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 221 | struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | struct xfrm6_tunnel_spi *x6spi; |
| 223 | struct hlist_node *pos, *n; |
| 224 | |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 225 | spin_lock_bh(&xfrm6_tunnel_spi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 227 | hlist_for_each_entry_safe(x6spi, pos, n, |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 228 | &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | list_byaddr) |
| 230 | { |
| 231 | if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | if (atomic_dec_and_test(&x6spi->refcnt)) { |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 233 | hlist_del_rcu(&x6spi->list_byaddr); |
| 234 | hlist_del_rcu(&x6spi->list_byspi); |
| 235 | call_rcu(&x6spi->rcu_head, x6spi_destroy_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | break; |
| 237 | } |
| 238 | } |
| 239 | } |
Eric Dumazet | 91cc3bb | 2009-10-23 18:19:19 +0000 | [diff] [blame] | 240 | spin_unlock_bh(&xfrm6_tunnel_spi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | EXPORT_SYMBOL(xfrm6_tunnel_free_spi); |
| 244 | |
| 245 | static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb) |
| 246 | { |
Herbert Xu | 7b277b1 | 2007-10-10 15:44:06 -0700 | [diff] [blame] | 247 | skb_push(skb, -skb_network_offset(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | return 0; |
| 249 | } |
| 250 | |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 251 | static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Herbert Xu | 04663d0 | 2007-10-17 21:28:06 -0700 | [diff] [blame] | 253 | return skb_network_header(skb)[IP6CB(skb)->nhoff]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 256 | static int xfrm6_tunnel_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 258 | struct net *net = dev_net(skb->dev); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 259 | struct ipv6hdr *iph = ipv6_hdr(skb); |
Al Viro | a252cc2 | 2006-09-27 18:48:18 -0700 | [diff] [blame] | 260 | __be32 spi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 262 | spi = xfrm6_tunnel_spi_lookup(net, (xfrm_address_t *)&iph->saddr); |
Herbert Xu | 33b5ecb | 2007-10-17 21:29:25 -0700 | [diff] [blame] | 263 | return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi) > 0 ? : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 266 | static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 267 | u8 type, u8 code, int offset, __be32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | /* xfrm6_tunnel native err handling */ |
| 270 | switch (type) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 271 | case ICMPV6_DEST_UNREACH: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | switch (code) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 273 | case ICMPV6_NOROUTE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | case ICMPV6_ADM_PROHIBITED: |
| 275 | case ICMPV6_NOT_NEIGHBOUR: |
| 276 | case ICMPV6_ADDR_UNREACH: |
| 277 | case ICMPV6_PORT_UNREACH: |
| 278 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | break; |
| 280 | } |
| 281 | break; |
| 282 | case ICMPV6_PKT_TOOBIG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | break; |
| 284 | case ICMPV6_TIME_EXCEED: |
| 285 | switch (code) { |
| 286 | case ICMPV6_EXC_HOPLIMIT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | break; |
| 288 | case ICMPV6_EXC_FRAGTIME: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 289 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | break; |
| 291 | } |
| 292 | break; |
| 293 | case ICMPV6_PARAMPROB: |
| 294 | switch (code) { |
| 295 | case ICMPV6_HDR_FIELD: break; |
| 296 | case ICMPV6_UNK_NEXTHDR: break; |
| 297 | case ICMPV6_UNK_OPTION: break; |
| 298 | } |
| 299 | break; |
| 300 | default: |
| 301 | break; |
| 302 | } |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 303 | |
| 304 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
| 306 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 307 | static int xfrm6_tunnel_init_state(struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Masahide NAKAMURA | 7e49e6d | 2006-09-22 15:05:15 -0700 | [diff] [blame] | 309 | if (x->props.mode != XFRM_MODE_TUNNEL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return -EINVAL; |
| 311 | |
| 312 | if (x->encap) |
| 313 | return -EINVAL; |
| 314 | |
| 315 | x->props.header_len = sizeof(struct ipv6hdr); |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static void xfrm6_tunnel_destroy(struct xfrm_state *x) |
| 321 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 322 | struct net *net = xs_net(x); |
| 323 | |
| 324 | xfrm6_tunnel_free_spi(net, (xfrm_address_t *)&x->props.saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
Eric Dumazet | 533cb5b | 2008-01-30 19:11:50 -0800 | [diff] [blame] | 327 | static const struct xfrm_type xfrm6_tunnel_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | .description = "IP6IP6", |
| 329 | .owner = THIS_MODULE, |
| 330 | .proto = IPPROTO_IPV6, |
| 331 | .init_state = xfrm6_tunnel_init_state, |
| 332 | .destructor = xfrm6_tunnel_destroy, |
| 333 | .input = xfrm6_tunnel_input, |
| 334 | .output = xfrm6_tunnel_output, |
| 335 | }; |
| 336 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 337 | static struct xfrm6_tunnel xfrm6_tunnel_handler = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | .handler = xfrm6_tunnel_rcv, |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 339 | .err_handler = xfrm6_tunnel_err, |
| 340 | .priority = 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | }; |
| 342 | |
Kazunori MIYAZAWA | 73d605d | 2007-02-13 12:55:55 -0800 | [diff] [blame] | 343 | static struct xfrm6_tunnel xfrm46_tunnel_handler = { |
| 344 | .handler = xfrm6_tunnel_rcv, |
| 345 | .err_handler = xfrm6_tunnel_err, |
| 346 | .priority = 2, |
| 347 | }; |
| 348 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 349 | static int __net_init xfrm6_tunnel_net_init(struct net *net) |
| 350 | { |
| 351 | struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); |
| 352 | unsigned int i; |
| 353 | |
| 354 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++) |
| 355 | INIT_HLIST_HEAD(&xfrm6_tn->spi_byaddr[i]); |
| 356 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++) |
| 357 | INIT_HLIST_HEAD(&xfrm6_tn->spi_byspi[i]); |
| 358 | xfrm6_tn->spi = 0; |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static void __net_exit xfrm6_tunnel_net_exit(struct net *net) |
| 364 | { |
| 365 | } |
| 366 | |
| 367 | static struct pernet_operations xfrm6_tunnel_net_ops = { |
| 368 | .init = xfrm6_tunnel_net_init, |
| 369 | .exit = xfrm6_tunnel_net_exit, |
| 370 | .id = &xfrm6_tunnel_net_id, |
| 371 | .size = sizeof(struct xfrm6_tunnel_net), |
| 372 | }; |
| 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | static int __init xfrm6_tunnel_init(void) |
| 375 | { |
Alexey Dobriyan | e924960 | 2010-01-25 10:28:21 +0000 | [diff] [blame] | 376 | int rv; |
| 377 | |
| 378 | rv = xfrm_register_type(&xfrm6_tunnel_type, AF_INET6); |
| 379 | if (rv < 0) |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 380 | goto err; |
Alexey Dobriyan | e924960 | 2010-01-25 10:28:21 +0000 | [diff] [blame] | 381 | rv = xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6); |
| 382 | if (rv < 0) |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 383 | goto unreg; |
Alexey Dobriyan | e924960 | 2010-01-25 10:28:21 +0000 | [diff] [blame] | 384 | rv = xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET); |
| 385 | if (rv < 0) |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 386 | goto dereg6; |
Alexey Dobriyan | e924960 | 2010-01-25 10:28:21 +0000 | [diff] [blame] | 387 | rv = xfrm6_tunnel_spi_init(); |
| 388 | if (rv < 0) |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 389 | goto dereg46; |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 390 | rv = register_pernet_subsys(&xfrm6_tunnel_net_ops); |
| 391 | if (rv < 0) |
| 392 | goto deregspi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | return 0; |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 394 | |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 395 | deregspi: |
| 396 | xfrm6_tunnel_spi_fini(); |
Ilpo Järvinen | 5ce1bbb | 2008-12-14 23:13:48 -0800 | [diff] [blame] | 397 | dereg46: |
| 398 | xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET); |
| 399 | dereg6: |
| 400 | xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6); |
| 401 | unreg: |
| 402 | xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); |
| 403 | err: |
Alexey Dobriyan | e924960 | 2010-01-25 10:28:21 +0000 | [diff] [blame] | 404 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | static void __exit xfrm6_tunnel_fini(void) |
| 408 | { |
Alexey Dobriyan | a166477 | 2010-01-25 10:37:54 +0000 | [diff] [blame] | 409 | unregister_pernet_subsys(&xfrm6_tunnel_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | xfrm6_tunnel_spi_fini(); |
Kazunori MIYAZAWA | 73d605d | 2007-02-13 12:55:55 -0800 | [diff] [blame] | 411 | xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET); |
| 412 | xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6); |
David S. Miller | a922ba5 | 2006-07-24 13:49:06 -0700 | [diff] [blame] | 413 | xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | module_init(xfrm6_tunnel_init); |
| 417 | module_exit(xfrm6_tunnel_fini); |
| 418 | MODULE_LICENSE("GPL"); |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 419 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_IPV6); |