Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 2 | * IPv6 tunneling device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Ville Nuorvala <vnuorval@tcs.hut.fi> |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 7 | * Yasuyuki Kozakai <kozakai@linux-ipv6.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Based on: |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 10 | * linux/net/ipv6/sit.c and linux/net/ipv4/ipip.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * |
| 12 | * RFC 2473 |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU General Public License |
| 16 | * as published by the Free Software Foundation; either version |
| 17 | * 2 of the License, or (at your option) any later version. |
| 18 | * |
| 19 | */ |
| 20 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/module.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 24 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/errno.h> |
| 26 | #include <linux/types.h> |
| 27 | #include <linux/sockios.h> |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 28 | #include <linux/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/if.h> |
| 30 | #include <linux/in.h> |
| 31 | #include <linux/ip.h> |
| 32 | #include <linux/if_tunnel.h> |
| 33 | #include <linux/net.h> |
| 34 | #include <linux/in6.h> |
| 35 | #include <linux/netdevice.h> |
| 36 | #include <linux/if_arp.h> |
| 37 | #include <linux/icmpv6.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/route.h> |
| 40 | #include <linux/rtnetlink.h> |
| 41 | #include <linux/netfilter_ipv6.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 42 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #include <asm/uaccess.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 45 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 47 | #include <net/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <net/ip.h> |
| 49 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <net/ip6_route.h> |
| 51 | #include <net/addrconf.h> |
| 52 | #include <net/ip6_tunnel.h> |
| 53 | #include <net/xfrm.h> |
| 54 | #include <net/dsfield.h> |
| 55 | #include <net/inet_ecn.h> |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 56 | #include <net/net_namespace.h> |
| 57 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | MODULE_AUTHOR("Ville Nuorvala"); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 60 | MODULE_DESCRIPTION("IPv6 tunneling device"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | MODULE_LICENSE("GPL"); |
stephen hemminger | 6dfbd87 | 2011-03-10 11:43:19 +0000 | [diff] [blame] | 62 | MODULE_ALIAS_NETDEV("ip6tnl0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #ifdef IP6_TNL_DEBUG |
Joe Perches | 91df42b | 2012-05-15 14:11:54 +0000 | [diff] [blame] | 65 | #define IP6_TNL_TRACE(x...) pr_debug("%s:" x "\n", __func__) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #else |
| 67 | #define IP6_TNL_TRACE(x...) do {;} while(0) |
| 68 | #endif |
| 69 | |
| 70 | #define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 71 | #define IPV6_TCLASS_SHIFT 20 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | #define HASH_SIZE 32 |
| 74 | |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 75 | #define HASH(addr) ((__force u32)((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 76 | (addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \ |
| 77 | (HASH_SIZE - 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 79 | static int ip6_tnl_dev_init(struct net_device *dev); |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 80 | static void ip6_tnl_dev_setup(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 82 | static int ip6_tnl_net_id __read_mostly; |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 83 | struct ip6_tnl_net { |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 84 | /* the IPv6 tunnel fallback device */ |
| 85 | struct net_device *fb_tnl_dev; |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 86 | /* lists for storing tunnels in use */ |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 87 | struct ip6_tnl __rcu *tnls_r_l[HASH_SIZE]; |
| 88 | struct ip6_tnl __rcu *tnls_wc[1]; |
| 89 | struct ip6_tnl __rcu **tnls[2]; |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 90 | }; |
| 91 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 92 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
| 93 | struct pcpu_tstats { |
| 94 | unsigned long rx_packets; |
| 95 | unsigned long rx_bytes; |
| 96 | unsigned long tx_packets; |
| 97 | unsigned long tx_bytes; |
Eric Dumazet | 8ce120f | 2011-11-04 23:19:28 +0000 | [diff] [blame] | 98 | } __attribute__((aligned(4*sizeof(unsigned long)))); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 99 | |
| 100 | static struct net_device_stats *ip6_get_stats(struct net_device *dev) |
| 101 | { |
| 102 | struct pcpu_tstats sum = { 0 }; |
| 103 | int i; |
| 104 | |
| 105 | for_each_possible_cpu(i) { |
| 106 | const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); |
| 107 | |
| 108 | sum.rx_packets += tstats->rx_packets; |
| 109 | sum.rx_bytes += tstats->rx_bytes; |
| 110 | sum.tx_packets += tstats->tx_packets; |
| 111 | sum.tx_bytes += tstats->tx_bytes; |
| 112 | } |
| 113 | dev->stats.rx_packets = sum.rx_packets; |
| 114 | dev->stats.rx_bytes = sum.rx_bytes; |
| 115 | dev->stats.tx_packets = sum.tx_packets; |
| 116 | dev->stats.tx_bytes = sum.tx_bytes; |
| 117 | return &dev->stats; |
| 118 | } |
| 119 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 120 | /* |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 121 | * Locking : hash tables are protected by RCU and RTNL |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 122 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
| 124 | static inline struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t) |
| 125 | { |
| 126 | struct dst_entry *dst = t->dst_cache; |
| 127 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 128 | if (dst && dst->obsolete && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | dst->ops->check(dst, t->dst_cookie) == NULL) { |
| 130 | t->dst_cache = NULL; |
| 131 | dst_release(dst); |
| 132 | return NULL; |
| 133 | } |
| 134 | |
| 135 | return dst; |
| 136 | } |
| 137 | |
| 138 | static inline void ip6_tnl_dst_reset(struct ip6_tnl *t) |
| 139 | { |
| 140 | dst_release(t->dst_cache); |
| 141 | t->dst_cache = NULL; |
| 142 | } |
| 143 | |
| 144 | static inline void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst) |
| 145 | { |
| 146 | struct rt6_info *rt = (struct rt6_info *) dst; |
| 147 | t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; |
| 148 | dst_release(t->dst_cache); |
| 149 | t->dst_cache = dst; |
| 150 | } |
| 151 | |
| 152 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 153 | * ip6_tnl_lookup - fetch tunnel matching the end-point addresses |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 154 | * @remote: the address of the tunnel exit-point |
| 155 | * @local: the address of the tunnel entry-point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 157 | * Return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | * tunnel matching given end-points if found, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 159 | * else fallback tunnel if its device is up, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | * else %NULL |
| 161 | **/ |
| 162 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 163 | #define for_each_ip6_tunnel_rcu(start) \ |
| 164 | for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | static struct ip6_tnl * |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 167 | ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | { |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 169 | unsigned int h0 = HASH(remote); |
| 170 | unsigned int h1 = HASH(local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | struct ip6_tnl *t; |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 172 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 174 | for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[h0 ^ h1]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
| 176 | ipv6_addr_equal(remote, &t->parms.raddr) && |
| 177 | (t->dev->flags & IFF_UP)) |
| 178 | return t; |
| 179 | } |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 180 | t = rcu_dereference(ip6n->tnls_wc[0]); |
| 181 | if (t && (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | return t; |
| 183 | |
| 184 | return NULL; |
| 185 | } |
| 186 | |
| 187 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 188 | * ip6_tnl_bucket - get head of list matching given tunnel parameters |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 189 | * @p: parameters containing tunnel end-points |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | * |
| 191 | * Description: |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 192 | * ip6_tnl_bucket() returns the head of the list matching the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | * &struct in6_addr entries laddr and raddr in @p. |
| 194 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 195 | * Return: head of IPv6 tunnel list |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | **/ |
| 197 | |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 198 | static struct ip6_tnl __rcu ** |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 199 | ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct ip6_tnl_parm *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 201 | const struct in6_addr *remote = &p->raddr; |
| 202 | const struct in6_addr *local = &p->laddr; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 203 | unsigned int h = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | int prio = 0; |
| 205 | |
| 206 | if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) { |
| 207 | prio = 1; |
| 208 | h = HASH(remote) ^ HASH(local); |
| 209 | } |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 210 | return &ip6n->tnls[prio][h]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 214 | * ip6_tnl_link - add tunnel to hash table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | * @t: tunnel to be added |
| 216 | **/ |
| 217 | |
| 218 | static void |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 219 | ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 221 | struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 223 | rcu_assign_pointer(t->next , rtnl_dereference(*tp)); |
| 224 | rcu_assign_pointer(*tp, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 228 | * ip6_tnl_unlink - remove tunnel from hash table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | * @t: tunnel to be removed |
| 230 | **/ |
| 231 | |
| 232 | static void |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 233 | ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 235 | struct ip6_tnl __rcu **tp; |
| 236 | struct ip6_tnl *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 238 | for (tp = ip6_tnl_bucket(ip6n, &t->parms); |
| 239 | (iter = rtnl_dereference(*tp)) != NULL; |
| 240 | tp = &iter->next) { |
| 241 | if (t == iter) { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 242 | rcu_assign_pointer(*tp, t->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | break; |
| 244 | } |
| 245 | } |
| 246 | } |
| 247 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 248 | static void ip6_dev_free(struct net_device *dev) |
| 249 | { |
| 250 | free_percpu(dev->tstats); |
| 251 | free_netdev(dev); |
| 252 | } |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 255 | * ip6_tnl_create - create a new tunnel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | * @p: tunnel parameters |
| 257 | * @pt: pointer to new tunnel |
| 258 | * |
| 259 | * Description: |
| 260 | * Create tunnel matching given parameters. |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 261 | * |
| 262 | * Return: |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 263 | * created tunnel or NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | **/ |
| 265 | |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 266 | static struct ip6_tnl *ip6_tnl_create(struct net *net, struct ip6_tnl_parm *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
| 268 | struct net_device *dev; |
| 269 | struct ip6_tnl *t; |
| 270 | char name[IFNAMSIZ]; |
| 271 | int err; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 272 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 274 | if (p->name[0]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | strlcpy(name, p->name, IFNAMSIZ); |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 276 | else |
| 277 | sprintf(name, "ip6tnl%%d"); |
| 278 | |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 279 | dev = alloc_netdev(sizeof (*t), name, ip6_tnl_dev_setup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (dev == NULL) |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 281 | goto failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Pavel Emelyanov | 554eb27 | 2008-04-16 01:24:13 -0700 | [diff] [blame] | 283 | dev_net_set(dev, net); |
| 284 | |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 285 | t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | t->parms = *p; |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 287 | err = ip6_tnl_dev_init(dev); |
| 288 | if (err < 0) |
| 289 | goto failed_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
Pavel Emelyanov | b37d428b | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 291 | if ((err = register_netdevice(dev)) < 0) |
| 292 | goto failed_free; |
| 293 | |
Josh Boyer | 731abb9 | 2011-11-10 15:10:23 +0000 | [diff] [blame] | 294 | strcpy(t->parms.name, dev->name); |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | dev_hold(dev); |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 297 | ip6_tnl_link(ip6n, t); |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 298 | return t; |
Pavel Emelyanov | b37d428b | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 299 | |
| 300 | failed_free: |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 301 | ip6_dev_free(dev); |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 302 | failed: |
| 303 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 307 | * ip6_tnl_locate - find or create tunnel matching given parameters |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 308 | * @p: tunnel parameters |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | * @create: != 0 if allowed to create new tunnel if no match found |
| 310 | * |
| 311 | * Description: |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 312 | * ip6_tnl_locate() first tries to locate an existing tunnel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | * based on @parms. If this is unsuccessful, but @create is set a new |
| 314 | * tunnel device is created and registered for use. |
| 315 | * |
| 316 | * Return: |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 317 | * matching tunnel or NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | **/ |
| 319 | |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 320 | static struct ip6_tnl *ip6_tnl_locate(struct net *net, |
| 321 | struct ip6_tnl_parm *p, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 323 | const struct in6_addr *remote = &p->raddr; |
| 324 | const struct in6_addr *local = &p->laddr; |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 325 | struct ip6_tnl __rcu **tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | struct ip6_tnl *t; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 327 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 329 | for (tp = ip6_tnl_bucket(ip6n, p); |
| 330 | (t = rtnl_dereference(*tp)) != NULL; |
| 331 | tp = &t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (ipv6_addr_equal(local, &t->parms.laddr) && |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 333 | ipv6_addr_equal(remote, &t->parms.raddr)) |
| 334 | return t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | if (!create) |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 337 | return NULL; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 338 | return ip6_tnl_create(net, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 342 | * ip6_tnl_dev_uninit - tunnel device uninitializer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | * @dev: the device to be destroyed |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 344 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | * Description: |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 346 | * ip6_tnl_dev_uninit() removes tunnel from its list |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | **/ |
| 348 | |
| 349 | static void |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 350 | ip6_tnl_dev_uninit(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 352 | struct ip6_tnl *t = netdev_priv(dev); |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 353 | struct net *net = dev_net(dev); |
| 354 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 356 | if (dev == ip6n->fb_tnl_dev) |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 357 | RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL); |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 358 | else |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 359 | ip6_tnl_unlink(ip6n, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | ip6_tnl_dst_reset(t); |
| 361 | dev_put(dev); |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * parse_tvl_tnl_enc_lim - handle encapsulation limit option |
| 366 | * @skb: received socket buffer |
| 367 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 368 | * Return: |
| 369 | * 0 if none was found, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | * else index to encapsulation limit |
| 371 | **/ |
| 372 | |
| 373 | static __u16 |
| 374 | parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw) |
| 375 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 376 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) raw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | __u8 nexthdr = ipv6h->nexthdr; |
| 378 | __u16 off = sizeof (*ipv6h); |
| 379 | |
| 380 | while (ipv6_ext_hdr(nexthdr) && nexthdr != NEXTHDR_NONE) { |
| 381 | __u16 optlen = 0; |
| 382 | struct ipv6_opt_hdr *hdr; |
| 383 | if (raw + off + sizeof (*hdr) > skb->data && |
| 384 | !pskb_may_pull(skb, raw - skb->data + off + sizeof (*hdr))) |
| 385 | break; |
| 386 | |
| 387 | hdr = (struct ipv6_opt_hdr *) (raw + off); |
| 388 | if (nexthdr == NEXTHDR_FRAGMENT) { |
| 389 | struct frag_hdr *frag_hdr = (struct frag_hdr *) hdr; |
| 390 | if (frag_hdr->frag_off) |
| 391 | break; |
| 392 | optlen = 8; |
| 393 | } else if (nexthdr == NEXTHDR_AUTH) { |
| 394 | optlen = (hdr->hdrlen + 2) << 2; |
| 395 | } else { |
| 396 | optlen = ipv6_optlen(hdr); |
| 397 | } |
| 398 | if (nexthdr == NEXTHDR_DEST) { |
| 399 | __u16 i = off + 2; |
| 400 | while (1) { |
| 401 | struct ipv6_tlv_tnl_enc_lim *tel; |
| 402 | |
| 403 | /* No more room for encapsulation limit */ |
| 404 | if (i + sizeof (*tel) > off + optlen) |
| 405 | break; |
| 406 | |
| 407 | tel = (struct ipv6_tlv_tnl_enc_lim *) &raw[i]; |
| 408 | /* return index of option if found and valid */ |
| 409 | if (tel->type == IPV6_TLV_TNL_ENCAP_LIMIT && |
| 410 | tel->length == 1) |
| 411 | return i; |
| 412 | /* else jump to next option */ |
| 413 | if (tel->type) |
| 414 | i += tel->length + 2; |
| 415 | else |
| 416 | i++; |
| 417 | } |
| 418 | } |
| 419 | nexthdr = hdr->nexthdr; |
| 420 | off += optlen; |
| 421 | } |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | /** |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 426 | * ip6_tnl_err - tunnel error handler |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | * |
| 428 | * Description: |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 429 | * ip6_tnl_err() should handle errors in the tunnel according |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | * to the specifications in RFC 2473. |
| 431 | **/ |
| 432 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 433 | static int |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 434 | ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 435 | u8 *type, u8 *code, int *msg, __u32 *info, int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 437 | const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | struct ip6_tnl *t; |
| 439 | int rel_msg = 0; |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 440 | u8 rel_type = ICMPV6_DEST_UNREACH; |
| 441 | u8 rel_code = ICMPV6_ADDR_UNREACH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | __u32 rel_info = 0; |
| 443 | __u16 len; |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 444 | int err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 446 | /* If the packet doesn't contain the original IPv6 header we are |
| 447 | in trouble since we might need the source address for further |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | processing of the error. */ |
| 449 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 450 | rcu_read_lock(); |
Pavel Emelyanov | 8704ca7e | 2008-04-16 01:22:43 -0700 | [diff] [blame] | 451 | if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->daddr, |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 452 | &ipv6h->saddr)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | goto out; |
| 454 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 455 | if (t->parms.proto != ipproto && t->parms.proto != 0) |
| 456 | goto out; |
| 457 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 458 | err = 0; |
| 459 | |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 460 | switch (*type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | __u32 teli; |
| 462 | struct ipv6_tlv_tnl_enc_lim *tel; |
| 463 | __u32 mtu; |
| 464 | case ICMPV6_DEST_UNREACH: |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 465 | net_warn_ratelimited("%s: Path to destination invalid or inactive!\n", |
| 466 | t->parms.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | rel_msg = 1; |
| 468 | break; |
| 469 | case ICMPV6_TIME_EXCEED: |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 470 | if ((*code) == ICMPV6_EXC_HOPLIMIT) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 471 | net_warn_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n", |
| 472 | t->parms.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | rel_msg = 1; |
| 474 | } |
| 475 | break; |
| 476 | case ICMPV6_PARAMPROB: |
Ville Nuorvala | 107a5fe | 2006-11-24 17:08:58 -0800 | [diff] [blame] | 477 | teli = 0; |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 478 | if ((*code) == ICMPV6_HDR_FIELD) |
Ville Nuorvala | 107a5fe | 2006-11-24 17:08:58 -0800 | [diff] [blame] | 479 | teli = parse_tlv_tnl_enc_lim(skb, skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Al Viro | 704eae1 | 2007-07-26 17:33:29 +0100 | [diff] [blame] | 481 | if (teli && teli == *info - 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli]; |
| 483 | if (tel->encap_limit == 0) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 484 | net_warn_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n", |
| 485 | t->parms.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | rel_msg = 1; |
| 487 | } |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 488 | } else { |
| 489 | net_warn_ratelimited("%s: Recipient unable to parse tunneled packet!\n", |
| 490 | t->parms.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | break; |
| 493 | case ICMPV6_PKT_TOOBIG: |
Al Viro | 704eae1 | 2007-07-26 17:33:29 +0100 | [diff] [blame] | 494 | mtu = *info - offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (mtu < IPV6_MIN_MTU) |
| 496 | mtu = IPV6_MIN_MTU; |
| 497 | t->dev->mtu = mtu; |
| 498 | |
Al Viro | cc6cdac | 2006-02-18 16:02:18 -0500 | [diff] [blame] | 499 | if ((len = sizeof (*ipv6h) + ntohs(ipv6h->payload_len)) > mtu) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | rel_type = ICMPV6_PKT_TOOBIG; |
| 501 | rel_code = 0; |
| 502 | rel_info = mtu; |
| 503 | rel_msg = 1; |
| 504 | } |
| 505 | break; |
| 506 | } |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 507 | |
| 508 | *type = rel_type; |
| 509 | *code = rel_code; |
| 510 | *info = rel_info; |
| 511 | *msg = rel_msg; |
| 512 | |
| 513 | out: |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 514 | rcu_read_unlock(); |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 515 | return err; |
| 516 | } |
| 517 | |
| 518 | static int |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 519 | ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 520 | u8 type, u8 code, int offset, __be32 info) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 521 | { |
| 522 | int rel_msg = 0; |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 523 | u8 rel_type = type; |
| 524 | u8 rel_code = code; |
Al Viro | 704eae1 | 2007-07-26 17:33:29 +0100 | [diff] [blame] | 525 | __u32 rel_info = ntohl(info); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 526 | int err; |
| 527 | struct sk_buff *skb2; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 528 | const struct iphdr *eiph; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 529 | struct rtable *rt; |
David S. Miller | 31e4543d | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 530 | struct flowi4 fl4; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 531 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 532 | err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code, |
| 533 | &rel_msg, &rel_info, offset); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 534 | if (err < 0) |
| 535 | return err; |
| 536 | |
| 537 | if (rel_msg == 0) |
| 538 | return 0; |
| 539 | |
| 540 | switch (rel_type) { |
| 541 | case ICMPV6_DEST_UNREACH: |
| 542 | if (rel_code != ICMPV6_ADDR_UNREACH) |
| 543 | return 0; |
| 544 | rel_type = ICMP_DEST_UNREACH; |
| 545 | rel_code = ICMP_HOST_UNREACH; |
| 546 | break; |
| 547 | case ICMPV6_PKT_TOOBIG: |
| 548 | if (rel_code != 0) |
| 549 | return 0; |
| 550 | rel_type = ICMP_DEST_UNREACH; |
| 551 | rel_code = ICMP_FRAG_NEEDED; |
| 552 | break; |
| 553 | default: |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | if (!pskb_may_pull(skb, offset + sizeof(struct iphdr))) |
| 558 | return 0; |
| 559 | |
| 560 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 561 | if (!skb2) |
| 562 | return 0; |
| 563 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 564 | skb_dst_drop(skb2); |
| 565 | |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 566 | skb_pull(skb2, offset); |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 567 | skb_reset_network_header(skb2); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 568 | eiph = ip_hdr(skb2); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 569 | |
| 570 | /* Try to guess incoming interface */ |
David S. Miller | 31e4543d | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 571 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 572 | eiph->saddr, 0, |
| 573 | 0, 0, |
| 574 | IPPROTO_IPIP, RT_TOS(eiph->tos), 0); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 575 | if (IS_ERR(rt)) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 576 | goto out; |
| 577 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 578 | skb2->dev = rt->dst.dev; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 579 | |
| 580 | /* route "incoming" packet */ |
| 581 | if (rt->rt_flags & RTCF_LOCAL) { |
| 582 | ip_rt_put(rt); |
| 583 | rt = NULL; |
David S. Miller | 31e4543d | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 584 | rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 585 | eiph->daddr, eiph->saddr, |
| 586 | 0, 0, |
| 587 | IPPROTO_IPIP, |
| 588 | RT_TOS(eiph->tos), 0); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 589 | if (IS_ERR(rt) || |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 590 | rt->dst.dev->type != ARPHRD_TUNNEL) { |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 591 | if (!IS_ERR(rt)) |
| 592 | ip_rt_put(rt); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 593 | goto out; |
| 594 | } |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 595 | skb_dst_set(skb2, &rt->dst); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 596 | } else { |
| 597 | ip_rt_put(rt); |
| 598 | if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos, |
| 599 | skb2->dev) || |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 600 | skb_dst(skb2)->dev->type != ARPHRD_TUNNEL) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 601 | goto out; |
| 602 | } |
| 603 | |
| 604 | /* change mtu on this route */ |
| 605 | if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 606 | if (rel_info > dst_mtu(skb_dst(skb2))) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 607 | goto out; |
| 608 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 609 | skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 610 | } |
| 611 | |
Al Viro | 704eae1 | 2007-07-26 17:33:29 +0100 | [diff] [blame] | 612 | icmp_send(skb2, rel_type, rel_code, htonl(rel_info)); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 613 | |
| 614 | out: |
| 615 | kfree_skb(skb2); |
| 616 | return 0; |
| 617 | } |
| 618 | |
| 619 | static int |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 620 | ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 621 | u8 type, u8 code, int offset, __be32 info) |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 622 | { |
| 623 | int rel_msg = 0; |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 624 | u8 rel_type = type; |
| 625 | u8 rel_code = code; |
Al Viro | 704eae1 | 2007-07-26 17:33:29 +0100 | [diff] [blame] | 626 | __u32 rel_info = ntohl(info); |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 627 | int err; |
| 628 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 629 | err = ip6_tnl_err(skb, IPPROTO_IPV6, opt, &rel_type, &rel_code, |
| 630 | &rel_msg, &rel_info, offset); |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 631 | if (err < 0) |
| 632 | return err; |
| 633 | |
| 634 | if (rel_msg && pskb_may_pull(skb, offset + sizeof(struct ipv6hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | struct rt6_info *rt; |
| 636 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); |
Ville Nuorvala | 305d4b3 | 2006-11-24 17:06:53 -0800 | [diff] [blame] | 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | if (!skb2) |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 639 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 641 | skb_dst_drop(skb2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | skb_pull(skb2, offset); |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 643 | skb_reset_network_header(skb2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
| 645 | /* Try to guess incoming interface */ |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 646 | rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, |
| 647 | NULL, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 649 | if (rt && rt->dst.dev) |
| 650 | skb2->dev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 652 | icmpv6_send(skb2, rel_type, rel_code, rel_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | if (rt) |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 655 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | kfree_skb(skb2); |
| 658 | } |
Yasuyuki Kozakai | e490d1d | 2006-10-31 23:11:25 +0900 | [diff] [blame] | 659 | |
| 660 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | } |
| 662 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 663 | static void ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
| 664 | const struct ipv6hdr *ipv6h, |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 665 | struct sk_buff *skb) |
| 666 | { |
| 667 | __u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK; |
| 668 | |
| 669 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 670 | ipv4_change_dsfield(ip_hdr(skb), INET_ECN_MASK, dsfield); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 671 | |
| 672 | if (INET_ECN_is_ce(dsfield)) |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 673 | IP_ECN_set_ce(ip_hdr(skb)); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 674 | } |
| 675 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 676 | static void ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t, |
| 677 | const struct ipv6hdr *ipv6h, |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 678 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 680 | if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY) |
Herbert Xu | 29bb43b4 | 2007-11-13 21:40:13 -0800 | [diff] [blame] | 681 | ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 683 | if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6h))) |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 684 | IP6_ECN_set_ce(ipv6_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | } |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 686 | |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 687 | static __u32 ip6_tnl_get_cap(struct ip6_tnl *t, |
| 688 | const struct in6_addr *laddr, |
| 689 | const struct in6_addr *raddr) |
| 690 | { |
| 691 | struct ip6_tnl_parm *p = &t->parms; |
| 692 | int ltype = ipv6_addr_type(laddr); |
| 693 | int rtype = ipv6_addr_type(raddr); |
| 694 | __u32 flags = 0; |
| 695 | |
| 696 | if (ltype == IPV6_ADDR_ANY || rtype == IPV6_ADDR_ANY) { |
| 697 | flags = IP6_TNL_F_CAP_PER_PACKET; |
| 698 | } else if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && |
| 699 | rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) && |
| 700 | !((ltype|rtype) & IPV6_ADDR_LOOPBACK) && |
| 701 | (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) { |
| 702 | if (ltype&IPV6_ADDR_UNICAST) |
| 703 | flags |= IP6_TNL_F_CAP_XMIT; |
| 704 | if (rtype&IPV6_ADDR_UNICAST) |
| 705 | flags |= IP6_TNL_F_CAP_RCV; |
| 706 | } |
| 707 | return flags; |
| 708 | } |
| 709 | |
Eric Dumazet | f1a28ea | 2009-11-02 11:21:37 +0100 | [diff] [blame] | 710 | /* called with rcu_read_lock() */ |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 711 | static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t, |
| 712 | const struct in6_addr *laddr, |
| 713 | const struct in6_addr *raddr) |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 714 | { |
| 715 | struct ip6_tnl_parm *p = &t->parms; |
| 716 | int ret = 0; |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 717 | struct net *net = dev_net(t->dev); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 718 | |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 719 | if ((p->flags & IP6_TNL_F_CAP_RCV) || |
| 720 | ((p->flags & IP6_TNL_F_CAP_PER_PACKET) && |
| 721 | (ip6_tnl_get_cap(t, laddr, raddr) & IP6_TNL_F_CAP_RCV))) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 722 | struct net_device *ldev = NULL; |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 723 | |
| 724 | if (p->link) |
Eric Dumazet | f1a28ea | 2009-11-02 11:21:37 +0100 | [diff] [blame] | 725 | ldev = dev_get_by_index_rcu(net, p->link); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 726 | |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 727 | if ((ipv6_addr_is_multicast(laddr) || |
| 728 | likely(ipv6_chk_addr(net, laddr, ldev, 0))) && |
| 729 | likely(!ipv6_chk_addr(net, raddr, NULL, 0))) |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 730 | ret = 1; |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 731 | } |
| 732 | return ret; |
| 733 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 736 | * ip6_tnl_rcv - decapsulate IPv6 packet and retransmit it locally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | * @skb: received socket buffer |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 738 | * @protocol: ethernet protocol ID |
| 739 | * @dscp_ecn_decapsulate: the function to decapsulate DSCP code and ECN |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | * |
| 741 | * Return: 0 |
| 742 | **/ |
| 743 | |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 744 | static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol, |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 745 | __u8 ipproto, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 746 | void (*dscp_ecn_decapsulate)(const struct ip6_tnl *t, |
| 747 | const struct ipv6hdr *ipv6h, |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 748 | struct sk_buff *skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | struct ip6_tnl *t; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 751 | const struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 753 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Pavel Emelyanov | 8704ca7e | 2008-04-16 01:22:43 -0700 | [diff] [blame] | 755 | if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr, |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 756 | &ipv6h->daddr)) != NULL) { |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 757 | struct pcpu_tstats *tstats; |
| 758 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 759 | if (t->parms.proto != ipproto && t->parms.proto != 0) { |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 760 | rcu_read_unlock(); |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 761 | goto discard; |
| 762 | } |
| 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 765 | rcu_read_unlock(); |
Herbert Xu | 50fba2a | 2006-04-04 13:50:45 -0700 | [diff] [blame] | 766 | goto discard; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | } |
| 768 | |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 769 | if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) { |
Pavel Emelyanov | 3dca02a | 2008-05-21 14:17:05 -0700 | [diff] [blame] | 770 | t->dev->stats.rx_dropped++; |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 771 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | goto discard; |
| 773 | } |
| 774 | secpath_reset(skb); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 775 | skb->mac_header = skb->network_header; |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 776 | skb_reset_network_header(skb); |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 777 | skb->protocol = htons(protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | skb->pkt_type = PACKET_HOST; |
| 779 | memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 780 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 781 | tstats = this_cpu_ptr(t->dev->tstats); |
| 782 | tstats->rx_packets++; |
| 783 | tstats->rx_bytes += skb->len; |
| 784 | |
| 785 | __skb_tunnel_rx(skb, t->dev); |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 786 | |
| 787 | dscp_ecn_decapsulate(t, ipv6h, skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 788 | |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 789 | netif_rx(skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 790 | |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 791 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | return 0; |
| 793 | } |
Eric Dumazet | 2922bc8 | 2009-10-23 06:34:34 +0000 | [diff] [blame] | 794 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | return 1; |
Herbert Xu | 50fba2a | 2006-04-04 13:50:45 -0700 | [diff] [blame] | 796 | |
| 797 | discard: |
| 798 | kfree_skb(skb); |
| 799 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
| 801 | |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 802 | static int ip4ip6_rcv(struct sk_buff *skb) |
| 803 | { |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 804 | return ip6_tnl_rcv(skb, ETH_P_IP, IPPROTO_IPIP, |
| 805 | ip4ip6_dscp_ecn_decapsulate); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 806 | } |
| 807 | |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 808 | static int ip6ip6_rcv(struct sk_buff *skb) |
| 809 | { |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 810 | return ip6_tnl_rcv(skb, ETH_P_IPV6, IPPROTO_IPV6, |
| 811 | ip6ip6_dscp_ecn_decapsulate); |
Yasuyuki Kozakai | 8359925 | 2006-11-03 09:39:14 +0900 | [diff] [blame] | 812 | } |
| 813 | |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 814 | struct ipv6_tel_txoption { |
| 815 | struct ipv6_txoptions ops; |
| 816 | __u8 dst_opt[8]; |
| 817 | }; |
| 818 | |
| 819 | static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | { |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 821 | memset(opt, 0, sizeof(struct ipv6_tel_txoption)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 823 | opt->dst_opt[2] = IPV6_TLV_TNL_ENCAP_LIMIT; |
| 824 | opt->dst_opt[3] = 1; |
| 825 | opt->dst_opt[4] = encap_limit; |
| 826 | opt->dst_opt[5] = IPV6_TLV_PADN; |
| 827 | opt->dst_opt[6] = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 829 | opt->ops.dst0opt = (struct ipv6_opt_hdr *) opt->dst_opt; |
| 830 | opt->ops.opt_nflen = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 834 | * ip6_tnl_addr_conflict - compare packet addresses to tunnel's own |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | * @t: the outgoing tunnel device |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 836 | * @hdr: IPv6 header from the incoming packet |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | * |
| 838 | * Description: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 839 | * Avoid trivial tunneling loop by checking that tunnel exit-point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | * doesn't match source of incoming packet. |
| 841 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 842 | * Return: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | * 1 if conflict, |
| 844 | * 0 else |
| 845 | **/ |
| 846 | |
Eric Dumazet | 92113bf | 2012-05-18 08:14:11 +0200 | [diff] [blame] | 847 | static inline bool |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 848 | ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | { |
| 850 | return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr); |
| 851 | } |
| 852 | |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 853 | static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t) |
| 854 | { |
| 855 | struct ip6_tnl_parm *p = &t->parms; |
| 856 | int ret = 0; |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 857 | struct net *net = dev_net(t->dev); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 858 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 859 | if (p->flags & IP6_TNL_F_CAP_XMIT) { |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 860 | struct net_device *ldev = NULL; |
| 861 | |
Eric Dumazet | f1a28ea | 2009-11-02 11:21:37 +0100 | [diff] [blame] | 862 | rcu_read_lock(); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 863 | if (p->link) |
Eric Dumazet | f1a28ea | 2009-11-02 11:21:37 +0100 | [diff] [blame] | 864 | ldev = dev_get_by_index_rcu(net, p->link); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 865 | |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 866 | if (unlikely(!ipv6_chk_addr(net, &p->laddr, ldev, 0))) |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 867 | pr_warn("%s xmit: Local address not yet configured!\n", |
| 868 | p->name); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 869 | else if (!ipv6_addr_is_multicast(&p->raddr) && |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 870 | unlikely(ipv6_chk_addr(net, &p->raddr, NULL, 0))) |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 871 | pr_warn("%s xmit: Routing loop! Remote address found on this node!\n", |
| 872 | p->name); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 873 | else |
| 874 | ret = 1; |
Eric Dumazet | f1a28ea | 2009-11-02 11:21:37 +0100 | [diff] [blame] | 875 | rcu_read_unlock(); |
Ville Nuorvala | 09c6bbf | 2006-11-24 17:06:27 -0800 | [diff] [blame] | 876 | } |
| 877 | return ret; |
| 878 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | /** |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 880 | * ip6_tnl_xmit2 - encapsulate packet and send |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | * @skb: the outgoing socket buffer |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 882 | * @dev: the outgoing tunnel device |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 883 | * @dsfield: dscp code for outer header |
| 884 | * @fl: flow of tunneled packet |
| 885 | * @encap_limit: encapsulation limit |
| 886 | * @pmtu: Path MTU is stored if packet is too big |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | * |
| 888 | * Description: |
| 889 | * Build new header and do some sanity checks on the packet before sending |
| 890 | * it. |
| 891 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 892 | * Return: |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 893 | * 0 on success |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 894 | * -1 fail |
| 895 | * %-EMSGSIZE message too big. return mtu in this case. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | **/ |
| 897 | |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 898 | static int ip6_tnl_xmit2(struct sk_buff *skb, |
| 899 | struct net_device *dev, |
| 900 | __u8 dsfield, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 901 | struct flowi6 *fl6, |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 902 | int encap_limit, |
| 903 | __u32 *pmtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | { |
Alexey Dobriyan | 52479b6 | 2008-11-25 17:35:18 -0800 | [diff] [blame] | 905 | struct net *net = dev_net(dev); |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 906 | struct ip6_tnl *t = netdev_priv(dev); |
Pavel Emelyanov | 3dca02a | 2008-05-21 14:17:05 -0700 | [diff] [blame] | 907 | struct net_device_stats *stats = &t->dev->stats; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 908 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 909 | struct ipv6_tel_txoption opt; |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 910 | struct dst_entry *dst = NULL, *ndst = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | struct net_device *tdev; |
| 912 | int mtu; |
Chuck Lever | c2636b4 | 2007-10-23 21:07:32 -0700 | [diff] [blame] | 913 | unsigned int max_headroom = sizeof(struct ipv6hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | u8 proto; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 915 | int err = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | int pkt_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 918 | if (!fl6->flowi6_mark) |
| 919 | dst = ip6_tnl_dst_check(t); |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 920 | if (!dst) { |
| 921 | ndst = ip6_route_output(net, NULL, fl6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 923 | if (ndst->error) |
Patrick McHardy | a57ebc9 | 2005-09-08 14:27:47 -0700 | [diff] [blame] | 924 | goto tx_err_link_failure; |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 925 | ndst = xfrm_lookup(net, ndst, flowi6_to_flowi(fl6), NULL, 0); |
| 926 | if (IS_ERR(ndst)) { |
| 927 | err = PTR_ERR(ndst); |
| 928 | ndst = NULL; |
David S. Miller | 452edd5 | 2011-03-02 13:27:41 -0800 | [diff] [blame] | 929 | goto tx_err_link_failure; |
| 930 | } |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 931 | dst = ndst; |
Patrick McHardy | a57ebc9 | 2005-09-08 14:27:47 -0700 | [diff] [blame] | 932 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
| 934 | tdev = dst->dev; |
| 935 | |
| 936 | if (tdev == dev) { |
| 937 | stats->collisions++; |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 938 | net_warn_ratelimited("%s: Local routing loop detected!\n", |
| 939 | t->parms.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | goto tx_err_dst_release; |
| 941 | } |
| 942 | mtu = dst_mtu(dst) - sizeof (*ipv6h); |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 943 | if (encap_limit >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | max_headroom += 8; |
| 945 | mtu -= 8; |
| 946 | } |
| 947 | if (mtu < IPV6_MIN_MTU) |
| 948 | mtu = IPV6_MIN_MTU; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 949 | if (skb_dst(skb)) |
| 950 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | if (skb->len > mtu) { |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 952 | *pmtu = mtu; |
| 953 | err = -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | goto tx_err_dst_release; |
| 955 | } |
| 956 | |
| 957 | /* |
| 958 | * Okay, now see if we can stuff it in the buffer as-is. |
| 959 | */ |
| 960 | max_headroom += LL_RESERVED_SPACE(tdev); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 961 | |
Patrick McHardy | cfbba49 | 2007-07-09 15:33:40 -0700 | [diff] [blame] | 962 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
| 963 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | struct sk_buff *new_skb; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 965 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | if (!(new_skb = skb_realloc_headroom(skb, max_headroom))) |
| 967 | goto tx_err_dst_release; |
| 968 | |
| 969 | if (skb->sk) |
| 970 | skb_set_owner_w(new_skb, skb->sk); |
Eric Dumazet | 9ff2644 | 2012-04-19 02:24:17 +0000 | [diff] [blame] | 971 | consume_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | skb = new_skb; |
| 973 | } |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 974 | skb_dst_drop(skb); |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 975 | if (fl6->flowi6_mark) { |
| 976 | skb_dst_set(skb, dst); |
| 977 | ndst = NULL; |
| 978 | } else { |
| 979 | skb_dst_set_noref(skb, dst); |
| 980 | } |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 981 | skb->transport_header = skb->network_header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 983 | proto = fl6->flowi6_proto; |
Ville Nuorvala | 6fb32dd | 2006-11-24 17:08:32 -0800 | [diff] [blame] | 984 | if (encap_limit >= 0) { |
| 985 | init_tel_txopt(&opt, encap_limit); |
| 986 | ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL); |
| 987 | } |
Arnaldo Carvalho de Melo | e2d1bca | 2007-04-10 20:46:21 -0700 | [diff] [blame] | 988 | skb_push(skb, sizeof(struct ipv6hdr)); |
| 989 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 990 | ipv6h = ipv6_hdr(skb); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 991 | *(__be32*)ipv6h = fl6->flowlabel | htonl(0x60000000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | dsfield = INET_ECN_encapsulate(0, dsfield); |
| 993 | ipv6_change_dsfield(ipv6h, ~INET_ECN_MASK, dsfield); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | ipv6h->hop_limit = t->parms.hop_limit; |
| 995 | ipv6h->nexthdr = proto; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 996 | ipv6h->saddr = fl6->saddr; |
| 997 | ipv6h->daddr = fl6->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | nf_reset(skb); |
| 999 | pkt_len = skb->len; |
Herbert Xu | ef76bc2 | 2008-01-11 19:15:08 -0800 | [diff] [blame] | 1000 | err = ip6_local_out(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
Gerrit Renker | b9df3cb | 2006-11-14 11:21:36 -0200 | [diff] [blame] | 1002 | if (net_xmit_eval(err) == 0) { |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1003 | struct pcpu_tstats *tstats = this_cpu_ptr(t->dev->tstats); |
| 1004 | |
| 1005 | tstats->tx_bytes += pkt_len; |
| 1006 | tstats->tx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } else { |
| 1008 | stats->tx_errors++; |
| 1009 | stats->tx_aborted_errors++; |
| 1010 | } |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 1011 | if (ndst) |
| 1012 | ip6_tnl_dst_store(t, ndst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | return 0; |
| 1014 | tx_err_link_failure: |
| 1015 | stats->tx_carrier_errors++; |
| 1016 | dst_link_failure(skb); |
| 1017 | tx_err_dst_release: |
Eric Dumazet | 89b0212 | 2011-07-28 04:32:25 +0000 | [diff] [blame] | 1018 | dst_release(ndst); |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1019 | return err; |
| 1020 | } |
| 1021 | |
| 1022 | static inline int |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1023 | ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1024 | { |
| 1025 | struct ip6_tnl *t = netdev_priv(dev); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1026 | const struct iphdr *iph = ip_hdr(skb); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1027 | int encap_limit = -1; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1028 | struct flowi6 fl6; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1029 | __u8 dsfield; |
| 1030 | __u32 mtu; |
| 1031 | int err; |
| 1032 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 1033 | if ((t->parms.proto != IPPROTO_IPIP && t->parms.proto != 0) || |
| 1034 | !ip6_tnl_xmit_ctl(t)) |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1035 | return -1; |
| 1036 | |
| 1037 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
| 1038 | encap_limit = t->parms.encap_limit; |
| 1039 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1040 | memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6)); |
| 1041 | fl6.flowi6_proto = IPPROTO_IPIP; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1042 | |
| 1043 | dsfield = ipv4_get_dsfield(iph); |
| 1044 | |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 1045 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1046 | fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT) |
Al Viro | b77f2fa | 2007-07-21 19:09:41 -0700 | [diff] [blame] | 1047 | & IPV6_TCLASS_MASK; |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 1048 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) |
| 1049 | fl6.flowi6_mark = skb->mark; |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1050 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1051 | err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1052 | if (err != 0) { |
| 1053 | /* XXX: send ICMP error even if DF is not set. */ |
| 1054 | if (err == -EMSGSIZE) |
| 1055 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, |
| 1056 | htonl(mtu)); |
| 1057 | return -1; |
| 1058 | } |
| 1059 | |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | static inline int |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1064 | ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1065 | { |
| 1066 | struct ip6_tnl *t = netdev_priv(dev); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1067 | struct ipv6hdr *ipv6h = ipv6_hdr(skb); |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1068 | int encap_limit = -1; |
| 1069 | __u16 offset; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1070 | struct flowi6 fl6; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1071 | __u8 dsfield; |
| 1072 | __u32 mtu; |
| 1073 | int err; |
| 1074 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 1075 | if ((t->parms.proto != IPPROTO_IPV6 && t->parms.proto != 0) || |
| 1076 | !ip6_tnl_xmit_ctl(t) || ip6_tnl_addr_conflict(t, ipv6h)) |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1077 | return -1; |
| 1078 | |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 1079 | offset = parse_tlv_tnl_enc_lim(skb, skb_network_header(skb)); |
| 1080 | if (offset > 0) { |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1081 | struct ipv6_tlv_tnl_enc_lim *tel; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 1082 | tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset]; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1083 | if (tel->encap_limit == 0) { |
| 1084 | icmpv6_send(skb, ICMPV6_PARAMPROB, |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1085 | ICMPV6_HDR_FIELD, offset + 2); |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1086 | return -1; |
| 1087 | } |
| 1088 | encap_limit = tel->encap_limit - 1; |
| 1089 | } else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
| 1090 | encap_limit = t->parms.encap_limit; |
| 1091 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1092 | memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6)); |
| 1093 | fl6.flowi6_proto = IPPROTO_IPV6; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1094 | |
| 1095 | dsfield = ipv6_get_dsfield(ipv6h); |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 1096 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1097 | fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK); |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 1098 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1099 | fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK); |
Eric Dumazet | d24f22f | 2011-09-20 14:50:00 -0400 | [diff] [blame] | 1100 | if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK) |
| 1101 | fl6.flowi6_mark = skb->mark; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1102 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1103 | err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu); |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1104 | if (err != 0) { |
| 1105 | if (err == -EMSGSIZE) |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 1106 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1107 | return -1; |
| 1108 | } |
| 1109 | |
| 1110 | return 0; |
| 1111 | } |
| 1112 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 1113 | static netdev_tx_t |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1114 | ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1115 | { |
| 1116 | struct ip6_tnl *t = netdev_priv(dev); |
Pavel Emelyanov | 3dca02a | 2008-05-21 14:17:05 -0700 | [diff] [blame] | 1117 | struct net_device_stats *stats = &t->dev->stats; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1118 | int ret; |
| 1119 | |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1120 | switch (skb->protocol) { |
Arnaldo Carvalho de Melo | 6067804 | 2008-09-20 22:20:49 -0700 | [diff] [blame] | 1121 | case htons(ETH_P_IP): |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1122 | ret = ip4ip6_tnl_xmit(skb, dev); |
| 1123 | break; |
Arnaldo Carvalho de Melo | 6067804 | 2008-09-20 22:20:49 -0700 | [diff] [blame] | 1124 | case htons(ETH_P_IPV6): |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1125 | ret = ip6ip6_tnl_xmit(skb, dev); |
| 1126 | break; |
| 1127 | default: |
| 1128 | goto tx_err; |
| 1129 | } |
| 1130 | |
| 1131 | if (ret < 0) |
| 1132 | goto tx_err; |
| 1133 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 1134 | return NETDEV_TX_OK; |
Yasuyuki Kozakai | 61ec2ae | 2006-11-05 22:56:45 +0900 | [diff] [blame] | 1135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | tx_err: |
| 1137 | stats->tx_errors++; |
| 1138 | stats->tx_dropped++; |
| 1139 | kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 1140 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | } |
| 1142 | |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1143 | static void ip6_tnl_link_config(struct ip6_tnl *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | { |
| 1145 | struct net_device *dev = t->dev; |
| 1146 | struct ip6_tnl_parm *p = &t->parms; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1147 | struct flowi6 *fl6 = &t->fl.u.ip6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Jiri Pirko | 3a6d54c | 2009-05-11 23:37:15 +0000 | [diff] [blame] | 1149 | memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); |
| 1150 | memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | /* Set up flowi template */ |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1153 | fl6->saddr = p->laddr; |
| 1154 | fl6->daddr = p->raddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1155 | fl6->flowi6_oif = p->link; |
| 1156 | fl6->flowlabel = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS)) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1159 | fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL)) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1161 | fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 1163 | p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET); |
| 1164 | p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | |
| 1166 | if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV) |
| 1167 | dev->flags |= IFF_POINTOPOINT; |
| 1168 | else |
| 1169 | dev->flags &= ~IFF_POINTOPOINT; |
| 1170 | |
| 1171 | dev->iflink = p->link; |
| 1172 | |
| 1173 | if (p->flags & IP6_TNL_F_CAP_XMIT) { |
Ville Nuorvala | 305d4b3 | 2006-11-24 17:06:53 -0800 | [diff] [blame] | 1174 | int strict = (ipv6_addr_type(&p->raddr) & |
| 1175 | (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL)); |
| 1176 | |
Pavel Emelyanov | 2f7f54b | 2008-04-16 01:23:44 -0700 | [diff] [blame] | 1177 | struct rt6_info *rt = rt6_lookup(dev_net(dev), |
| 1178 | &p->raddr, &p->laddr, |
Ville Nuorvala | 305d4b3 | 2006-11-24 17:06:53 -0800 | [diff] [blame] | 1179 | p->link, strict); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | if (rt == NULL) |
| 1182 | return; |
| 1183 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1184 | if (rt->dst.dev) { |
| 1185 | dev->hard_header_len = rt->dst.dev->hard_header_len + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | sizeof (struct ipv6hdr); |
| 1187 | |
David S. Miller | d191854 | 2011-12-28 20:19:20 -0500 | [diff] [blame] | 1188 | dev->mtu = rt->dst.dev->mtu - sizeof (struct ipv6hdr); |
Anders Franzen | 381601e | 2010-11-24 05:47:18 +0000 | [diff] [blame] | 1189 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
| 1190 | dev->mtu-=8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | if (dev->mtu < IPV6_MIN_MTU) |
| 1193 | dev->mtu = IPV6_MIN_MTU; |
| 1194 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1195 | dst_release(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1200 | * ip6_tnl_change - update the tunnel parameters |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | * @t: tunnel to be changed |
| 1202 | * @p: tunnel configuration parameters |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | * |
| 1204 | * Description: |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1205 | * ip6_tnl_change() updates the tunnel parameters |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | **/ |
| 1207 | |
| 1208 | static int |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1209 | ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1211 | t->parms.laddr = p->laddr; |
| 1212 | t->parms.raddr = p->raddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | t->parms.flags = p->flags; |
| 1214 | t->parms.hop_limit = p->hop_limit; |
| 1215 | t->parms.encap_limit = p->encap_limit; |
| 1216 | t->parms.flowinfo = p->flowinfo; |
Gabor Fekete | 8181b8c | 2005-06-08 14:54:38 -0700 | [diff] [blame] | 1217 | t->parms.link = p->link; |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 1218 | t->parms.proto = p->proto; |
Hugo Santos | 0c08889 | 2006-02-24 13:16:25 -0800 | [diff] [blame] | 1219 | ip6_tnl_dst_reset(t); |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1220 | ip6_tnl_link_config(t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | return 0; |
| 1222 | } |
| 1223 | |
| 1224 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1225 | * ip6_tnl_ioctl - configure ipv6 tunnels from userspace |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | * @dev: virtual device associated with tunnel |
| 1227 | * @ifr: parameters passed from userspace |
| 1228 | * @cmd: command to be performed |
| 1229 | * |
| 1230 | * Description: |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1231 | * ip6_tnl_ioctl() is used for managing IPv6 tunnels |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1232 | * from userspace. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | * |
| 1234 | * The possible commands are the following: |
| 1235 | * %SIOCGETTUNNEL: get tunnel parameters for device |
| 1236 | * %SIOCADDTUNNEL: add tunnel matching given tunnel parameters |
| 1237 | * %SIOCCHGTUNNEL: change tunnel parameters to those given |
| 1238 | * %SIOCDELTUNNEL: delete tunnel |
| 1239 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1240 | * The fallback device "ip6tnl0", created during module |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | * initialization, can be used for creating other tunnel devices. |
| 1242 | * |
| 1243 | * Return: |
| 1244 | * 0 on success, |
| 1245 | * %-EFAULT if unable to copy data to or from userspace, |
| 1246 | * %-EPERM if current process hasn't %CAP_NET_ADMIN set |
| 1247 | * %-EINVAL if passed tunnel parameters are invalid, |
| 1248 | * %-EEXIST if changing a tunnel's parameters would cause a conflict |
| 1249 | * %-ENODEV if attempting to change or delete a nonexisting device |
| 1250 | **/ |
| 1251 | |
| 1252 | static int |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1253 | ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | { |
| 1255 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | struct ip6_tnl_parm p; |
| 1257 | struct ip6_tnl *t = NULL; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1258 | struct net *net = dev_net(dev); |
| 1259 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
| 1261 | switch (cmd) { |
| 1262 | case SIOCGETTUNNEL: |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1263 | if (dev == ip6n->fb_tnl_dev) { |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1264 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | err = -EFAULT; |
| 1266 | break; |
| 1267 | } |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1268 | t = ip6_tnl_locate(net, &p, 0); |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1269 | } |
| 1270 | if (t == NULL) |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1271 | t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | memcpy(&p, &t->parms, sizeof (p)); |
| 1273 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) { |
| 1274 | err = -EFAULT; |
| 1275 | } |
| 1276 | break; |
| 1277 | case SIOCADDTUNNEL: |
| 1278 | case SIOCCHGTUNNEL: |
| 1279 | err = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | if (!capable(CAP_NET_ADMIN)) |
| 1281 | break; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1282 | err = -EFAULT; |
| 1283 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | break; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1285 | err = -EINVAL; |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 1286 | if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP && |
| 1287 | p.proto != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | break; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1289 | t = ip6_tnl_locate(net, &p, cmd == SIOCADDTUNNEL); |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1290 | if (dev != ip6n->fb_tnl_dev && cmd == SIOCCHGTUNNEL) { |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1291 | if (t != NULL) { |
| 1292 | if (t->dev != dev) { |
| 1293 | err = -EEXIST; |
| 1294 | break; |
| 1295 | } |
| 1296 | } else |
| 1297 | t = netdev_priv(dev); |
| 1298 | |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1299 | ip6_tnl_unlink(ip6n, t); |
Pavel Emelyanov | 74b0b85 | 2010-10-27 05:43:53 +0000 | [diff] [blame] | 1300 | synchronize_net(); |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1301 | err = ip6_tnl_change(t, &p); |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1302 | ip6_tnl_link(ip6n, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | netdev_state_change(dev); |
| 1304 | } |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1305 | if (t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | err = 0; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1307 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof (p))) |
| 1308 | err = -EFAULT; |
| 1309 | |
| 1310 | } else |
| 1311 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | break; |
| 1313 | case SIOCDELTUNNEL: |
| 1314 | err = -EPERM; |
| 1315 | if (!capable(CAP_NET_ADMIN)) |
| 1316 | break; |
| 1317 | |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1318 | if (dev == ip6n->fb_tnl_dev) { |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1319 | err = -EFAULT; |
| 1320 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | break; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1322 | err = -ENOENT; |
Pavel Emelyanov | 2dd02c8 | 2008-04-16 01:22:23 -0700 | [diff] [blame] | 1323 | if ((t = ip6_tnl_locate(net, &p, 0)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | break; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1325 | err = -EPERM; |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1326 | if (t->dev == ip6n->fb_tnl_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | break; |
Ville Nuorvala | 567131a | 2006-11-24 17:05:41 -0800 | [diff] [blame] | 1328 | dev = t->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | } |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 1330 | err = 0; |
| 1331 | unregister_netdevice(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | break; |
| 1333 | default: |
| 1334 | err = -EINVAL; |
| 1335 | } |
| 1336 | return err; |
| 1337 | } |
| 1338 | |
| 1339 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1340 | * ip6_tnl_change_mtu - change mtu manually for tunnel device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | * @dev: virtual device associated with tunnel |
| 1342 | * @new_mtu: the new mtu |
| 1343 | * |
| 1344 | * Return: |
| 1345 | * 0 on success, |
| 1346 | * %-EINVAL if mtu too small |
| 1347 | **/ |
| 1348 | |
| 1349 | static int |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1350 | ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | { |
| 1352 | if (new_mtu < IPV6_MIN_MTU) { |
| 1353 | return -EINVAL; |
| 1354 | } |
| 1355 | dev->mtu = new_mtu; |
| 1356 | return 0; |
| 1357 | } |
| 1358 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1359 | |
| 1360 | static const struct net_device_ops ip6_tnl_netdev_ops = { |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1361 | .ndo_uninit = ip6_tnl_dev_uninit, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1362 | .ndo_start_xmit = ip6_tnl_xmit, |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1363 | .ndo_do_ioctl = ip6_tnl_ioctl, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1364 | .ndo_change_mtu = ip6_tnl_change_mtu, |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1365 | .ndo_get_stats = ip6_get_stats, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1366 | }; |
| 1367 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1370 | * ip6_tnl_dev_setup - setup virtual tunnel device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | * @dev: virtual device associated with tunnel |
| 1372 | * |
| 1373 | * Description: |
| 1374 | * Initialize function pointers and device parameters |
| 1375 | **/ |
| 1376 | |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1377 | static void ip6_tnl_dev_setup(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | { |
Anders Franzen | 381601e | 2010-11-24 05:47:18 +0000 | [diff] [blame] | 1379 | struct ip6_tnl *t; |
| 1380 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1381 | dev->netdev_ops = &ip6_tnl_netdev_ops; |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1382 | dev->destructor = ip6_dev_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | |
| 1384 | dev->type = ARPHRD_TUNNEL6; |
| 1385 | dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr); |
| 1386 | dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr); |
Anders Franzen | 381601e | 2010-11-24 05:47:18 +0000 | [diff] [blame] | 1387 | t = netdev_priv(dev); |
| 1388 | if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) |
| 1389 | dev->mtu-=8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | dev->flags |= IFF_NOARP; |
| 1391 | dev->addr_len = sizeof(struct in6_addr); |
Pavel Emelyanov | 554eb27 | 2008-04-16 01:24:13 -0700 | [diff] [blame] | 1392 | dev->features |= NETIF_F_NETNS_LOCAL; |
Anders Franzen | 7e223de | 2010-10-19 03:50:47 +0000 | [diff] [blame] | 1393 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | } |
| 1395 | |
| 1396 | |
| 1397 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1398 | * ip6_tnl_dev_init_gen - general initializer for all tunnel devices |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | * @dev: virtual device associated with tunnel |
| 1400 | **/ |
| 1401 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1402 | static inline int |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1403 | ip6_tnl_dev_init_gen(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1405 | struct ip6_tnl *t = netdev_priv(dev); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | t->dev = dev; |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1408 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
| 1409 | if (!dev->tstats) |
| 1410 | return -ENOMEM; |
| 1411 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | } |
| 1413 | |
| 1414 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1415 | * ip6_tnl_dev_init - initializer for all non fallback tunnel devices |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | * @dev: virtual device associated with tunnel |
| 1417 | **/ |
| 1418 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1419 | static int ip6_tnl_dev_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1421 | struct ip6_tnl *t = netdev_priv(dev); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1422 | int err = ip6_tnl_dev_init_gen(dev); |
| 1423 | |
| 1424 | if (err) |
| 1425 | return err; |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1426 | ip6_tnl_link_config(t); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1427 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | } |
| 1429 | |
| 1430 | /** |
Yasuyuki Kozakai | 3144581 | 2007-02-10 00:30:33 +0900 | [diff] [blame] | 1431 | * ip6_fb_tnl_dev_init - initializer for fallback tunnel device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | * @dev: fallback device |
| 1433 | * |
| 1434 | * Return: 0 |
| 1435 | **/ |
| 1436 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1437 | static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1439 | struct ip6_tnl *t = netdev_priv(dev); |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1440 | struct net *net = dev_net(dev); |
| 1441 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1442 | int err = ip6_tnl_dev_init_gen(dev); |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1443 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1444 | if (err) |
| 1445 | return err; |
| 1446 | |
Yasuyuki Kozakai | 502b093 | 2006-11-30 14:43:28 +0900 | [diff] [blame] | 1447 | t->parms.proto = IPPROTO_IPV6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | dev_hold(dev); |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 1449 | |
| 1450 | ip6_tnl_link_config(t); |
| 1451 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1452 | rcu_assign_pointer(ip6n->tnls_wc[0], t); |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1453 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | } |
| 1455 | |
Eric Dumazet | 3ff2cfa | 2010-08-30 10:27:10 +0000 | [diff] [blame] | 1456 | static struct xfrm6_tunnel ip4ip6_handler __read_mostly = { |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1457 | .handler = ip4ip6_rcv, |
| 1458 | .err_handler = ip4ip6_err, |
| 1459 | .priority = 1, |
| 1460 | }; |
| 1461 | |
Eric Dumazet | 3ff2cfa | 2010-08-30 10:27:10 +0000 | [diff] [blame] | 1462 | static struct xfrm6_tunnel ip6ip6_handler __read_mostly = { |
Patrick McHardy | 0303770 | 2005-07-19 14:03:34 -0700 | [diff] [blame] | 1463 | .handler = ip6ip6_rcv, |
| 1464 | .err_handler = ip6ip6_err, |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 1465 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | }; |
| 1467 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1468 | static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n) |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1469 | { |
| 1470 | int h; |
| 1471 | struct ip6_tnl *t; |
Eric Dumazet | cf4432f | 2009-10-28 05:16:51 +0000 | [diff] [blame] | 1472 | LIST_HEAD(list); |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1473 | |
| 1474 | for (h = 0; h < HASH_SIZE; h++) { |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 1475 | t = rtnl_dereference(ip6n->tnls_r_l[h]); |
Eric Dumazet | cf4432f | 2009-10-28 05:16:51 +0000 | [diff] [blame] | 1476 | while (t != NULL) { |
| 1477 | unregister_netdevice_queue(t->dev, &list); |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 1478 | t = rtnl_dereference(t->next); |
Eric Dumazet | cf4432f | 2009-10-28 05:16:51 +0000 | [diff] [blame] | 1479 | } |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1480 | } |
| 1481 | |
Eric Dumazet | 9476763 | 2010-09-15 20:25:34 +0000 | [diff] [blame] | 1482 | t = rtnl_dereference(ip6n->tnls_wc[0]); |
Eric Dumazet | cf4432f | 2009-10-28 05:16:51 +0000 | [diff] [blame] | 1483 | unregister_netdevice_queue(t->dev, &list); |
| 1484 | unregister_netdevice_many(&list); |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1485 | } |
| 1486 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1487 | static int __net_init ip6_tnl_init_net(struct net *net) |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1488 | { |
Eric W. Biederman | ac31cd3 | 2009-11-29 15:46:15 +0000 | [diff] [blame] | 1489 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Josh Boyer | 731abb9 | 2011-11-10 15:10:23 +0000 | [diff] [blame] | 1490 | struct ip6_tnl *t = NULL; |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1491 | int err; |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1492 | |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1493 | ip6n->tnls[0] = ip6n->tnls_wc; |
| 1494 | ip6n->tnls[1] = ip6n->tnls_r_l; |
| 1495 | |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1496 | err = -ENOMEM; |
| 1497 | ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0", |
| 1498 | ip6_tnl_dev_setup); |
| 1499 | |
| 1500 | if (!ip6n->fb_tnl_dev) |
| 1501 | goto err_alloc_dev; |
Alexey Dobriyan | be77e59 | 2008-11-23 17:26:26 -0800 | [diff] [blame] | 1502 | dev_net_set(ip6n->fb_tnl_dev, net); |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1503 | |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1504 | err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev); |
| 1505 | if (err < 0) |
| 1506 | goto err_register; |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1507 | |
| 1508 | err = register_netdev(ip6n->fb_tnl_dev); |
| 1509 | if (err < 0) |
| 1510 | goto err_register; |
Josh Boyer | 731abb9 | 2011-11-10 15:10:23 +0000 | [diff] [blame] | 1511 | |
| 1512 | t = netdev_priv(ip6n->fb_tnl_dev); |
| 1513 | |
| 1514 | strcpy(t->parms.name, ip6n->fb_tnl_dev->name); |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1515 | return 0; |
| 1516 | |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1517 | err_register: |
Eric Dumazet | 8560f22 | 2010-09-28 03:23:34 +0000 | [diff] [blame] | 1518 | ip6_dev_free(ip6n->fb_tnl_dev); |
Pavel Emelyanov | 15820e129 | 2008-04-16 01:23:02 -0700 | [diff] [blame] | 1519 | err_alloc_dev: |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1520 | return err; |
| 1521 | } |
| 1522 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1523 | static void __net_exit ip6_tnl_exit_net(struct net *net) |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1524 | { |
Eric W. Biederman | ac31cd3 | 2009-11-29 15:46:15 +0000 | [diff] [blame] | 1525 | struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1526 | |
Pavel Emelyanov | 3e6c9fb | 2008-04-16 01:23:22 -0700 | [diff] [blame] | 1527 | rtnl_lock(); |
| 1528 | ip6_tnl_destroy_tunnels(ip6n); |
| 1529 | rtnl_unlock(); |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1530 | } |
| 1531 | |
| 1532 | static struct pernet_operations ip6_tnl_net_ops = { |
| 1533 | .init = ip6_tnl_init_net, |
| 1534 | .exit = ip6_tnl_exit_net, |
Eric W. Biederman | ac31cd3 | 2009-11-29 15:46:15 +0000 | [diff] [blame] | 1535 | .id = &ip6_tnl_net_id, |
| 1536 | .size = sizeof(struct ip6_tnl_net), |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1537 | }; |
| 1538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | /** |
| 1540 | * ip6_tunnel_init - register protocol and reserve needed resources |
| 1541 | * |
| 1542 | * Return: 0 on success |
| 1543 | **/ |
| 1544 | |
| 1545 | static int __init ip6_tunnel_init(void) |
| 1546 | { |
| 1547 | int err; |
| 1548 | |
Eric W. Biederman | ac31cd3 | 2009-11-29 15:46:15 +0000 | [diff] [blame] | 1549 | err = register_pernet_device(&ip6_tnl_net_ops); |
Pavel Emelyanov | 13eeb8e | 2008-04-16 01:22:02 -0700 | [diff] [blame] | 1550 | if (err < 0) |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1551 | goto out_pernet; |
| 1552 | |
| 1553 | err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET); |
| 1554 | if (err < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1555 | pr_err("%s: can't register ip4ip6\n", __func__); |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1556 | goto out_ip4ip6; |
| 1557 | } |
| 1558 | |
| 1559 | err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6); |
| 1560 | if (err < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1561 | pr_err("%s: can't register ip6ip6\n", __func__); |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1562 | goto out_ip6ip6; |
| 1563 | } |
| 1564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | return 0; |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1566 | |
| 1567 | out_ip6ip6: |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1568 | xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET); |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1569 | out_ip4ip6: |
| 1570 | unregister_pernet_device(&ip6_tnl_net_ops); |
| 1571 | out_pernet: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | return err; |
| 1573 | } |
| 1574 | |
| 1575 | /** |
| 1576 | * ip6_tunnel_cleanup - free resources and unregister protocol |
| 1577 | **/ |
| 1578 | |
| 1579 | static void __exit ip6_tunnel_cleanup(void) |
| 1580 | { |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1581 | if (xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET)) |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1582 | pr_info("%s: can't deregister ip4ip6\n", __func__); |
Yasuyuki Kozakai | c4d3efa | 2007-02-15 00:43:16 +0900 | [diff] [blame] | 1583 | |
Kazunori MIYAZAWA | 73d605d | 2007-02-13 12:55:55 -0800 | [diff] [blame] | 1584 | if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6)) |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1585 | pr_info("%s: can't deregister ip6ip6\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | |
Eric W. Biederman | ac31cd3 | 2009-11-29 15:46:15 +0000 | [diff] [blame] | 1587 | unregister_pernet_device(&ip6_tnl_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | } |
| 1589 | |
| 1590 | module_init(ip6_tunnel_init); |
| 1591 | module_exit(ip6_tunnel_cleanup); |