Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IPv6 over IPv4 tunnel device - Simple Internet Transition (SIT) |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * Changes: |
| 15 | * Roger Venning <r.venning@telstra.com>: 6to4 support |
| 16 | * Nate Thompson <nate@thebog.net>: 6to4 support |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 17 | * Fred Templin <fred.l.templin@boeing.com>: isatap support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/module.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 21 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/socket.h> |
| 25 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/net.h> |
| 27 | #include <linux/in6.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #include <linux/if_arp.h> |
| 30 | #include <linux/icmp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/uaccess.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <linux/netfilter_ipv4.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 35 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #include <net/sock.h> |
| 38 | #include <net/snmp.h> |
| 39 | |
| 40 | #include <net/ipv6.h> |
| 41 | #include <net/protocol.h> |
| 42 | #include <net/transp_v6.h> |
| 43 | #include <net/ip6_fib.h> |
| 44 | #include <net/ip6_route.h> |
| 45 | #include <net/ndisc.h> |
| 46 | #include <net/addrconf.h> |
| 47 | #include <net/ip.h> |
| 48 | #include <net/udp.h> |
| 49 | #include <net/icmp.h> |
| 50 | #include <net/ipip.h> |
| 51 | #include <net/inet_ecn.h> |
| 52 | #include <net/xfrm.h> |
| 53 | #include <net/dsfield.h> |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 54 | #include <net/net_namespace.h> |
| 55 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c |
| 59 | |
| 60 | For comments look at net/ipv4/ip_gre.c --ANK |
| 61 | */ |
| 62 | |
| 63 | #define HASH_SIZE 16 |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 64 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 66 | static int ipip6_tunnel_init(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static void ipip6_tunnel_setup(struct net_device *dev); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 68 | static void ipip6_dev_free(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 70 | static int sit_net_id __read_mostly; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 71 | struct sit_net { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 72 | struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE]; |
| 73 | struct ip_tunnel __rcu *tunnels_r[HASH_SIZE]; |
| 74 | struct ip_tunnel __rcu *tunnels_l[HASH_SIZE]; |
| 75 | struct ip_tunnel __rcu *tunnels_wc[1]; |
| 76 | struct ip_tunnel __rcu **tunnels[4]; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 77 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 78 | struct net_device *fb_tunnel_dev; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 81 | /* |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 82 | * Locking : hash tables are protected by RCU and RTNL |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 83 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 85 | #define for_each_ip_tunnel_rcu(start) \ |
| 86 | for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) |
| 87 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 88 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
| 89 | struct pcpu_tstats { |
| 90 | unsigned long rx_packets; |
| 91 | unsigned long rx_bytes; |
| 92 | unsigned long tx_packets; |
| 93 | unsigned long tx_bytes; |
Eric Dumazet | 8ce120f | 2011-11-04 23:19:28 +0000 | [diff] [blame] | 94 | } __attribute__((aligned(4*sizeof(unsigned long)))); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 95 | |
| 96 | static struct net_device_stats *ipip6_get_stats(struct net_device *dev) |
| 97 | { |
| 98 | struct pcpu_tstats sum = { 0 }; |
| 99 | int i; |
| 100 | |
| 101 | for_each_possible_cpu(i) { |
| 102 | const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i); |
| 103 | |
| 104 | sum.rx_packets += tstats->rx_packets; |
| 105 | sum.rx_bytes += tstats->rx_bytes; |
| 106 | sum.tx_packets += tstats->tx_packets; |
| 107 | sum.tx_bytes += tstats->tx_bytes; |
| 108 | } |
| 109 | dev->stats.rx_packets = sum.rx_packets; |
| 110 | dev->stats.rx_bytes = sum.rx_bytes; |
| 111 | dev->stats.tx_packets = sum.tx_packets; |
| 112 | dev->stats.tx_bytes = sum.tx_bytes; |
| 113 | return &dev->stats; |
| 114 | } |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 115 | /* |
| 116 | * Must be invoked with rcu_read_lock |
| 117 | */ |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 118 | static struct ip_tunnel * ipip6_tunnel_lookup(struct net *net, |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 119 | struct net_device *dev, __be32 remote, __be32 local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 121 | unsigned int h0 = HASH(remote); |
| 122 | unsigned int h1 = HASH(local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | struct ip_tunnel *t; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 124 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 126 | for_each_ip_tunnel_rcu(sitn->tunnels_r_l[h0 ^ h1]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | if (local == t->parms.iph.saddr && |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 128 | remote == t->parms.iph.daddr && |
| 129 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 130 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | return t; |
| 132 | } |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 133 | for_each_ip_tunnel_rcu(sitn->tunnels_r[h0]) { |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 134 | if (remote == t->parms.iph.daddr && |
| 135 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 136 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | return t; |
| 138 | } |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 139 | for_each_ip_tunnel_rcu(sitn->tunnels_l[h1]) { |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 140 | if (local == t->parms.iph.saddr && |
| 141 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 142 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | return t; |
| 144 | } |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 145 | t = rcu_dereference(sitn->tunnels_wc[0]); |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 146 | if ((t != NULL) && (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | return t; |
| 148 | return NULL; |
| 149 | } |
| 150 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 151 | static struct ip_tunnel __rcu **__ipip6_bucket(struct sit_net *sitn, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 152 | struct ip_tunnel_parm *parms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | { |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 154 | __be32 remote = parms->iph.daddr; |
| 155 | __be32 local = parms->iph.saddr; |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 156 | unsigned int h = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | int prio = 0; |
| 158 | |
| 159 | if (remote) { |
| 160 | prio |= 2; |
| 161 | h ^= HASH(remote); |
| 162 | } |
| 163 | if (local) { |
| 164 | prio |= 1; |
| 165 | h ^= HASH(local); |
| 166 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 167 | return &sitn->tunnels[prio][h]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 170 | static inline struct ip_tunnel __rcu **ipip6_bucket(struct sit_net *sitn, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 171 | struct ip_tunnel *t) |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 172 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 173 | return __ipip6_bucket(sitn, &t->parms); |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 174 | } |
| 175 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 176 | static void ipip6_tunnel_unlink(struct sit_net *sitn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 178 | struct ip_tunnel __rcu **tp; |
| 179 | struct ip_tunnel *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 181 | for (tp = ipip6_bucket(sitn, t); |
| 182 | (iter = rtnl_dereference(*tp)) != NULL; |
| 183 | tp = &iter->next) { |
| 184 | if (t == iter) { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 185 | rcu_assign_pointer(*tp, t->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | break; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 191 | static void ipip6_tunnel_link(struct sit_net *sitn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 193 | struct ip_tunnel __rcu **tp = ipip6_bucket(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 195 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); |
| 196 | rcu_assign_pointer(*tp, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | } |
| 198 | |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 199 | static void ipip6_tunnel_clone_6rd(struct net_device *dev, struct sit_net *sitn) |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 200 | { |
| 201 | #ifdef CONFIG_IPV6_SIT_6RD |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 202 | struct ip_tunnel *t = netdev_priv(dev); |
| 203 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 204 | if (t->dev == sitn->fb_tunnel_dev) { |
| 205 | ipv6_addr_set(&t->ip6rd.prefix, htonl(0x20020000), 0, 0, 0); |
| 206 | t->ip6rd.relay_prefix = 0; |
| 207 | t->ip6rd.prefixlen = 16; |
| 208 | t->ip6rd.relay_prefixlen = 0; |
| 209 | } else { |
| 210 | struct ip_tunnel *t0 = netdev_priv(sitn->fb_tunnel_dev); |
| 211 | memcpy(&t->ip6rd, &t0->ip6rd, sizeof(t->ip6rd)); |
| 212 | } |
| 213 | #endif |
| 214 | } |
| 215 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 216 | static struct ip_tunnel *ipip6_tunnel_locate(struct net *net, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 217 | struct ip_tunnel_parm *parms, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 219 | __be32 remote = parms->iph.daddr; |
| 220 | __be32 local = parms->iph.saddr; |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 221 | struct ip_tunnel *t, *nt; |
| 222 | struct ip_tunnel __rcu **tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | char name[IFNAMSIZ]; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 225 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 227 | for (tp = __ipip6_bucket(sitn, parms); |
| 228 | (t = rtnl_dereference(*tp)) != NULL; |
| 229 | tp = &t->next) { |
Sascha Hlusiak | 8db99e5 | 2009-05-19 12:56:48 +0000 | [diff] [blame] | 230 | if (local == t->parms.iph.saddr && |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 231 | remote == t->parms.iph.daddr && |
| 232 | parms->link == t->parms.link) { |
Sascha Hlusiak | 8db99e5 | 2009-05-19 12:56:48 +0000 | [diff] [blame] | 233 | if (create) |
| 234 | return NULL; |
| 235 | else |
| 236 | return t; |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | if (!create) |
| 240 | goto failed; |
| 241 | |
| 242 | if (parms->name[0]) |
| 243 | strlcpy(name, parms->name, IFNAMSIZ); |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 244 | else |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 245 | strcpy(name, "sit%d"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | dev = alloc_netdev(sizeof(*t), name, ipip6_tunnel_setup); |
| 248 | if (dev == NULL) |
| 249 | return NULL; |
| 250 | |
Pavel Emelyanov | 7a97146 | 2008-04-16 01:17:18 -0700 | [diff] [blame] | 251 | dev_net_set(dev, net); |
| 252 | |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 253 | nt = netdev_priv(dev); |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | nt->parms = *parms; |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 256 | if (ipip6_tunnel_init(dev) < 0) |
| 257 | goto failed_free; |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 258 | ipip6_tunnel_clone_6rd(dev, sitn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 260 | if (parms->i_flags & SIT_ISATAP) |
| 261 | dev->priv_flags |= IFF_ISATAP; |
| 262 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 263 | if (register_netdevice(dev) < 0) |
| 264 | goto failed_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Ted Feng | 72b3601 | 2011-12-08 00:46:21 +0000 | [diff] [blame] | 266 | strcpy(nt->parms.name, dev->name); |
| 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | dev_hold(dev); |
| 269 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 270 | ipip6_tunnel_link(sitn, nt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | return nt; |
| 272 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 273 | failed_free: |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 274 | ipip6_dev_free(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | failed: |
| 276 | return NULL; |
| 277 | } |
| 278 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 279 | #define for_each_prl_rcu(start) \ |
| 280 | for (prl = rcu_dereference(start); \ |
| 281 | prl; \ |
| 282 | prl = rcu_dereference(prl->next)) |
| 283 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 284 | static struct ip_tunnel_prl_entry * |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 285 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 286 | { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 287 | struct ip_tunnel_prl_entry *prl; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 288 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 289 | for_each_prl_rcu(t->prl) |
| 290 | if (prl->addr == addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 291 | break; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 292 | return prl; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 293 | |
| 294 | } |
| 295 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 296 | static int ipip6_tunnel_get_prl(struct ip_tunnel *t, |
| 297 | struct ip_tunnel_prl __user *a) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 298 | { |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 299 | struct ip_tunnel_prl kprl, *kp; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 300 | struct ip_tunnel_prl_entry *prl; |
| 301 | unsigned int cmax, c = 0, ca, len; |
| 302 | int ret = 0; |
| 303 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 304 | if (copy_from_user(&kprl, a, sizeof(kprl))) |
| 305 | return -EFAULT; |
| 306 | cmax = kprl.datalen / sizeof(kprl); |
| 307 | if (cmax > 1 && kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 308 | cmax = 1; |
| 309 | |
| 310 | /* For simple GET or for root users, |
| 311 | * we try harder to allocate. |
| 312 | */ |
| 313 | kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ? |
| 314 | kcalloc(cmax, sizeof(*kp), GFP_KERNEL) : |
| 315 | NULL; |
| 316 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 317 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 318 | |
| 319 | ca = t->prl_count < cmax ? t->prl_count : cmax; |
| 320 | |
| 321 | if (!kp) { |
| 322 | /* We don't try hard to allocate much memory for |
| 323 | * non-root users. |
| 324 | * For root users, retry allocating enough memory for |
| 325 | * the answer. |
| 326 | */ |
| 327 | kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC); |
| 328 | if (!kp) { |
| 329 | ret = -ENOMEM; |
| 330 | goto out; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | c = 0; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 335 | for_each_prl_rcu(t->prl) { |
Sascha Hlusiak | 298bf12 | 2009-09-29 11:27:05 +0000 | [diff] [blame] | 336 | if (c >= cmax) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 337 | break; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 338 | if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 339 | continue; |
| 340 | kp[c].addr = prl->addr; |
| 341 | kp[c].flags = prl->flags; |
| 342 | c++; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 343 | if (kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 344 | break; |
| 345 | } |
| 346 | out: |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 347 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 348 | |
| 349 | len = sizeof(*kp) * c; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 350 | ret = 0; |
| 351 | if ((len && copy_to_user(a + 1, kp, len)) || put_user(len, &a->datalen)) |
| 352 | ret = -EFAULT; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 353 | |
| 354 | kfree(kp); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 355 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 356 | return ret; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 357 | } |
| 358 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 359 | static int |
| 360 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) |
| 361 | { |
| 362 | struct ip_tunnel_prl_entry *p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 363 | int err = 0; |
| 364 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 365 | if (a->addr == htonl(INADDR_ANY)) |
| 366 | return -EINVAL; |
| 367 | |
Eric Dumazet | aac4ddd | 2010-06-01 00:26:58 -0700 | [diff] [blame] | 368 | ASSERT_RTNL(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 369 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 370 | for (p = rtnl_dereference(t->prl); p; p = rtnl_dereference(p->next)) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 371 | if (p->addr == a->addr) { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 372 | if (chg) { |
| 373 | p->flags = a->flags; |
| 374 | goto out; |
| 375 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 376 | err = -EEXIST; |
| 377 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 378 | } |
| 379 | } |
| 380 | |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 381 | if (chg) { |
| 382 | err = -ENXIO; |
| 383 | goto out; |
| 384 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 385 | |
| 386 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 387 | if (!p) { |
| 388 | err = -ENOBUFS; |
| 389 | goto out; |
| 390 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 391 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 392 | p->next = t->prl; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 393 | p->addr = a->addr; |
| 394 | p->flags = a->flags; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 395 | t->prl_count++; |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 396 | rcu_assign_pointer(t->prl, p); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 397 | out: |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 398 | return err; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 399 | } |
| 400 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 401 | static void prl_list_destroy_rcu(struct rcu_head *head) |
| 402 | { |
| 403 | struct ip_tunnel_prl_entry *p, *n; |
| 404 | |
| 405 | p = container_of(head, struct ip_tunnel_prl_entry, rcu_head); |
| 406 | do { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 407 | n = rcu_dereference_protected(p->next, 1); |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 408 | kfree(p); |
| 409 | p = n; |
| 410 | } while (p); |
| 411 | } |
| 412 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 413 | static int |
| 414 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) |
| 415 | { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 416 | struct ip_tunnel_prl_entry *x; |
| 417 | struct ip_tunnel_prl_entry __rcu **p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 418 | int err = 0; |
| 419 | |
Eric Dumazet | aac4ddd | 2010-06-01 00:26:58 -0700 | [diff] [blame] | 420 | ASSERT_RTNL(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 421 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 422 | if (a && a->addr != htonl(INADDR_ANY)) { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 423 | for (p = &t->prl; |
| 424 | (x = rtnl_dereference(*p)) != NULL; |
| 425 | p = &x->next) { |
| 426 | if (x->addr == a->addr) { |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 427 | *p = x->next; |
Paul E. McKenney | 11c476f | 2011-05-02 00:56:57 -0700 | [diff] [blame] | 428 | kfree_rcu(x, rcu_head); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 429 | t->prl_count--; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 430 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 431 | } |
| 432 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 433 | err = -ENXIO; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 434 | } else { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 435 | x = rtnl_dereference(t->prl); |
| 436 | if (x) { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 437 | t->prl_count = 0; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 438 | call_rcu(&x->rcu_head, prl_list_destroy_rcu); |
| 439 | t->prl = NULL; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 440 | } |
| 441 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 442 | out: |
Sascha Hlusiak | 4b2796017 | 2009-05-19 12:56:50 +0000 | [diff] [blame] | 443 | return err; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 444 | } |
| 445 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 446 | static int |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 447 | isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 448 | { |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 449 | struct ip_tunnel_prl_entry *p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 450 | int ok = 1; |
| 451 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 452 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 453 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 454 | if (p) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 455 | if (p->flags & PRL_DEFAULT) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 456 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; |
| 457 | else |
| 458 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; |
| 459 | } else { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 460 | const struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; |
| 461 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 462 | if (ipv6_addr_is_isatap(addr6) && |
| 463 | (addr6->s6_addr32[3] == iph->saddr) && |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 464 | ipv6_chk_prefix(addr6, t->dev)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 465 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; |
| 466 | else |
| 467 | ok = 0; |
| 468 | } |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 469 | rcu_read_unlock(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 470 | return ok; |
| 471 | } |
| 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | static void ipip6_tunnel_uninit(struct net_device *dev) |
| 474 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 475 | struct net *net = dev_net(dev); |
| 476 | struct sit_net *sitn = net_generic(net, sit_net_id); |
| 477 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 478 | if (dev == sitn->fb_tunnel_dev) { |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 479 | RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } else { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 481 | ipip6_tunnel_unlink(sitn, netdev_priv(dev)); |
YOSHIFUJI Hideaki | 02e10b9 | 2008-04-10 15:41:27 +0900 | [diff] [blame] | 482 | ipip6_tunnel_del_prl(netdev_priv(dev), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 484 | dev_put(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 488 | static int ipip6_err(struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Rami Rosen | 071f92d | 2008-05-21 17:47:54 -0700 | [diff] [blame] | 491 | /* All the routers (except for Linux) return only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | 8 bytes of packet payload. It means, that precise relaying of |
| 493 | ICMP in the real Internet is absolutely infeasible. |
| 494 | */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 495 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 496 | const int type = icmp_hdr(skb)->type; |
| 497 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | struct ip_tunnel *t; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 499 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
| 501 | switch (type) { |
| 502 | default: |
| 503 | case ICMP_PARAMETERPROB: |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 504 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | case ICMP_DEST_UNREACH: |
| 507 | switch (code) { |
| 508 | case ICMP_SR_FAILED: |
| 509 | case ICMP_PORT_UNREACH: |
| 510 | /* Impossible event. */ |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 511 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | case ICMP_FRAG_NEEDED: |
| 513 | /* Soft state for pmtu is maintained by IP core. */ |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 514 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | default: |
| 516 | /* All others are translated to HOST_UNREACH. |
| 517 | rfc2003 contains "deep thoughts" about NET_UNREACH, |
| 518 | I believe they are just ether pollution. --ANK |
| 519 | */ |
| 520 | break; |
| 521 | } |
| 522 | break; |
| 523 | case ICMP_TIME_EXCEEDED: |
| 524 | if (code != ICMP_EXC_TTL) |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 525 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | break; |
| 527 | } |
| 528 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 529 | err = -ENOENT; |
| 530 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 531 | rcu_read_lock(); |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 532 | t = ipip6_tunnel_lookup(dev_net(skb->dev), |
| 533 | skb->dev, |
| 534 | iph->daddr, |
| 535 | iph->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | if (t == NULL || t->parms.iph.daddr == 0) |
| 537 | goto out; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 538 | |
| 539 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
| 541 | goto out; |
| 542 | |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 543 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | t->err_count++; |
| 545 | else |
| 546 | t->err_count = 1; |
| 547 | t->err_time = jiffies; |
| 548 | out: |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 549 | rcu_read_unlock(); |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 550 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
| 552 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 553 | static inline void ipip6_ecn_decapsulate(const struct iphdr *iph, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | { |
| 555 | if (INET_ECN_is_ce(iph->tos)) |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 556 | IP6_ECN_set_ce(ipv6_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | static int ipip6_rcv(struct sk_buff *skb) |
| 560 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 561 | const struct iphdr *iph; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | struct ip_tunnel *tunnel; |
| 563 | |
| 564 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) |
| 565 | goto out; |
| 566 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 567 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 569 | rcu_read_lock(); |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 570 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
| 571 | iph->saddr, iph->daddr); |
| 572 | if (tunnel != NULL) { |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 573 | struct pcpu_tstats *tstats; |
| 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | secpath_reset(skb); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 576 | skb->mac_header = skb->network_header; |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 577 | skb_reset_network_header(skb); |
Patrick McHardy | 8cdfab8 | 2006-01-06 23:04:01 -0800 | [diff] [blame] | 578 | IPCB(skb)->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | skb->protocol = htons(ETH_P_IPV6); |
| 580 | skb->pkt_type = PACKET_HOST; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 581 | |
| 582 | if ((tunnel->dev->priv_flags & IFF_ISATAP) && |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 583 | !isatap_chksrc(skb, iph, tunnel)) { |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 584 | tunnel->dev->stats.rx_errors++; |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 585 | rcu_read_unlock(); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 586 | kfree_skb(skb); |
| 587 | return 0; |
| 588 | } |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 589 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 590 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
| 591 | tstats->rx_packets++; |
| 592 | tstats->rx_bytes += skb->len; |
| 593 | |
| 594 | __skb_tunnel_rx(skb, tunnel->dev); |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | ipip6_ecn_decapsulate(iph, skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 597 | |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 598 | netif_rx(skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 599 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 600 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | return 0; |
| 602 | } |
| 603 | |
David McCullough | 6dcdd1b | 2010-11-29 19:32:34 +0000 | [diff] [blame] | 604 | /* no tunnel matched, let upstream know, ipsec may handle it */ |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 605 | rcu_read_unlock(); |
David McCullough | 6dcdd1b | 2010-11-29 19:32:34 +0000 | [diff] [blame] | 606 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | out: |
David S. Miller | 36ca34c | 2008-05-08 23:40:26 -0700 | [diff] [blame] | 608 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return 0; |
| 610 | } |
| 611 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 612 | /* |
| 613 | * Returns the embedded IPv4 address if the IPv6 address |
| 614 | * comes from 6rd / 6to4 (RFC 3056) addr space. |
| 615 | */ |
| 616 | static inline |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 617 | __be32 try_6rd(const struct in6_addr *v6dst, struct ip_tunnel *tunnel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 619 | __be32 dst = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 621 | #ifdef CONFIG_IPV6_SIT_6RD |
| 622 | if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix, |
| 623 | tunnel->ip6rd.prefixlen)) { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 624 | unsigned int pbw0, pbi0; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 625 | int pbi1; |
| 626 | u32 d; |
| 627 | |
| 628 | pbw0 = tunnel->ip6rd.prefixlen >> 5; |
| 629 | pbi0 = tunnel->ip6rd.prefixlen & 0x1f; |
| 630 | |
YOSHIFUJI Hideaki / 吉藤英明 | e7db38c | 2009-10-11 03:44:45 +0000 | [diff] [blame] | 631 | d = (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >> |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 632 | tunnel->ip6rd.relay_prefixlen; |
| 633 | |
| 634 | pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen; |
| 635 | if (pbi1 > 0) |
YOSHIFUJI Hideaki / 吉藤英明 | e7db38c | 2009-10-11 03:44:45 +0000 | [diff] [blame] | 636 | d |= ntohl(v6dst->s6_addr32[pbw0 + 1]) >> |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 637 | (32 - pbi1); |
| 638 | |
| 639 | dst = tunnel->ip6rd.relay_prefix | htonl(d); |
| 640 | } |
| 641 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | if (v6dst->s6_addr16[0] == htons(0x2002)) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 643 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | memcpy(&dst, &v6dst->s6_addr16[1], 4); |
| 645 | } |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 646 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | return dst; |
| 648 | } |
| 649 | |
| 650 | /* |
| 651 | * This function assumes it is being called from dev_queue_xmit() |
| 652 | * and that skb is filled properly by that function. |
| 653 | */ |
| 654 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 655 | static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, |
| 656 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 658 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 659 | struct pcpu_tstats *tstats; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 660 | const struct iphdr *tiph = &tunnel->parms.iph; |
| 661 | const struct ipv6hdr *iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | u8 tos = tunnel->parms.iph.tos; |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 663 | __be16 df = tiph->frag_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | struct rtable *rt; /* Route to the other host */ |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 665 | struct net_device *tdev; /* Device to other host */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | struct iphdr *iph; /* Our new IP header */ |
Chuck Lever | c2636b4 | 2007-10-23 21:07:32 -0700 | [diff] [blame] | 667 | unsigned int max_headroom; /* The extra header space needed */ |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 668 | __be32 dst = tiph->daddr; |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 669 | struct flowi4 fl4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | int mtu; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 671 | const struct in6_addr *addr6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | int addr_type; |
| 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | if (skb->protocol != htons(ETH_P_IPV6)) |
| 675 | goto tx_error; |
| 676 | |
Lionel Elie Mamane | c2bceb3 | 2011-08-13 14:04:38 +0000 | [diff] [blame] | 677 | if (tos == 1) |
| 678 | tos = ipv6_get_dsfield(iph6); |
| 679 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 680 | /* ISATAP (RFC4214) - must come before 6to4 */ |
| 681 | if (dev->priv_flags & IFF_ISATAP) { |
| 682 | struct neighbour *neigh = NULL; |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 683 | bool do_tx_error = false; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 684 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 685 | if (skb_dst(skb)) |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 686 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 687 | |
| 688 | if (neigh == NULL) { |
| 689 | if (net_ratelimit()) |
| 690 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); |
| 691 | goto tx_error; |
| 692 | } |
| 693 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 694 | addr6 = (const struct in6_addr*)&neigh->primary_key; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 695 | addr_type = ipv6_addr_type(addr6); |
| 696 | |
| 697 | if ((addr_type & IPV6_ADDR_UNICAST) && |
| 698 | ipv6_addr_is_isatap(addr6)) |
| 699 | dst = addr6->s6_addr32[3]; |
| 700 | else |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 701 | do_tx_error = true; |
| 702 | |
| 703 | neigh_release(neigh); |
| 704 | if (do_tx_error) |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 705 | goto tx_error; |
| 706 | } |
| 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | if (!dst) |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 709 | dst = try_6rd(&iph6->daddr, tunnel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | if (!dst) { |
| 712 | struct neighbour *neigh = NULL; |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 713 | bool do_tx_error = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 715 | if (skb_dst(skb)) |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 716 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
| 718 | if (neigh == NULL) { |
| 719 | if (net_ratelimit()) |
| 720 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); |
| 721 | goto tx_error; |
| 722 | } |
| 723 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 724 | addr6 = (const struct in6_addr*)&neigh->primary_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | addr_type = ipv6_addr_type(addr6); |
| 726 | |
| 727 | if (addr_type == IPV6_ADDR_ANY) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 728 | addr6 = &ipv6_hdr(skb)->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | addr_type = ipv6_addr_type(addr6); |
| 730 | } |
| 731 | |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 732 | if ((addr_type & IPV6_ADDR_COMPATv4) != 0) |
| 733 | dst = addr6->s6_addr32[3]; |
| 734 | else |
| 735 | do_tx_error = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 737 | neigh_release(neigh); |
| 738 | if (do_tx_error) |
| 739 | goto tx_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 742 | rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 743 | dst, tiph->saddr, |
| 744 | 0, 0, |
| 745 | IPPROTO_IPV6, RT_TOS(tos), |
| 746 | tunnel->parms.link); |
| 747 | if (IS_ERR(rt)) { |
| 748 | dev->stats.tx_carrier_errors++; |
| 749 | goto tx_error_icmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
| 751 | if (rt->rt_type != RTN_UNICAST) { |
| 752 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 753 | dev->stats.tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | goto tx_error_icmp; |
| 755 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 756 | tdev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
| 758 | if (tdev == dev) { |
| 759 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 760 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | goto tx_error; |
| 762 | } |
| 763 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 764 | if (df) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 765 | mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 767 | if (mtu < 68) { |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 768 | dev->stats.collisions++; |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 769 | ip_rt_put(rt); |
| 770 | goto tx_error; |
| 771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 773 | if (mtu < IPV6_MIN_MTU) { |
| 774 | mtu = IPV6_MIN_MTU; |
| 775 | df = 0; |
| 776 | } |
| 777 | |
| 778 | if (tunnel->parms.iph.daddr && skb_dst(skb)) |
| 779 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); |
| 780 | |
| 781 | if (skb->len > mtu) { |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 782 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 783 | ip_rt_put(rt); |
| 784 | goto tx_error; |
| 785 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | |
| 788 | if (tunnel->err_count > 0) { |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 789 | if (time_before(jiffies, |
| 790 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | tunnel->err_count--; |
| 792 | dst_link_failure(skb); |
| 793 | } else |
| 794 | tunnel->err_count = 0; |
| 795 | } |
| 796 | |
| 797 | /* |
| 798 | * Okay, now see if we can stuff it in the buffer as-is. |
| 799 | */ |
| 800 | max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); |
| 801 | |
Patrick McHardy | cfbba49 | 2007-07-09 15:33:40 -0700 | [diff] [blame] | 802 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
| 803 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
| 805 | if (!new_skb) { |
| 806 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 807 | dev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 809 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | } |
| 811 | if (skb->sk) |
| 812 | skb_set_owner_w(new_skb, skb->sk); |
| 813 | dev_kfree_skb(skb); |
| 814 | skb = new_skb; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 815 | iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
| 817 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 818 | skb->transport_header = skb->network_header; |
Arnaldo Carvalho de Melo | e2d1bca | 2007-04-10 20:46:21 -0700 | [diff] [blame] | 819 | skb_push(skb, sizeof(struct iphdr)); |
| 820 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
Patrick McHardy | 8cdfab8 | 2006-01-06 23:04:01 -0800 | [diff] [blame] | 822 | IPCB(skb)->flags = 0; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 823 | skb_dst_drop(skb); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 824 | skb_dst_set(skb, &rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | /* |
| 827 | * Push down and install the IPIP header. |
| 828 | */ |
| 829 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 830 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | iph->version = 4; |
| 832 | iph->ihl = sizeof(struct iphdr)>>2; |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 833 | iph->frag_off = df; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | iph->protocol = IPPROTO_IPV6; |
| 835 | iph->tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); |
David S. Miller | 301102c | 2011-05-04 12:46:24 -0700 | [diff] [blame] | 836 | iph->daddr = fl4.daddr; |
| 837 | iph->saddr = fl4.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | |
| 839 | if ((iph->ttl = tiph->ttl) == 0) |
| 840 | iph->ttl = iph6->hop_limit; |
| 841 | |
| 842 | nf_reset(skb); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 843 | tstats = this_cpu_ptr(dev->tstats); |
| 844 | __IPTUNNEL_XMIT(tstats, &dev->stats); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 845 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
| 847 | tx_error_icmp: |
| 848 | dst_link_failure(skb); |
| 849 | tx_error: |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 850 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | dev_kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 852 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 855 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
| 856 | { |
| 857 | struct net_device *tdev = NULL; |
| 858 | struct ip_tunnel *tunnel; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 859 | const struct iphdr *iph; |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 860 | struct flowi4 fl4; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 861 | |
| 862 | tunnel = netdev_priv(dev); |
| 863 | iph = &tunnel->parms.iph; |
| 864 | |
| 865 | if (iph->daddr) { |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 866 | struct rtable *rt = ip_route_output_ports(dev_net(dev), &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 867 | iph->daddr, iph->saddr, |
| 868 | 0, 0, |
| 869 | IPPROTO_IPV6, |
| 870 | RT_TOS(iph->tos), |
| 871 | tunnel->parms.link); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 872 | |
| 873 | if (!IS_ERR(rt)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 874 | tdev = rt->dst.dev; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 875 | ip_rt_put(rt); |
| 876 | } |
| 877 | dev->flags |= IFF_POINTOPOINT; |
| 878 | } |
| 879 | |
| 880 | if (!tdev && tunnel->parms.link) |
Pavel Emelyanov | 907a08c | 2008-04-16 01:16:58 -0700 | [diff] [blame] | 881 | tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link); |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 882 | |
| 883 | if (tdev) { |
| 884 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); |
| 885 | dev->mtu = tdev->mtu - sizeof(struct iphdr); |
| 886 | if (dev->mtu < IPV6_MIN_MTU) |
| 887 | dev->mtu = IPV6_MIN_MTU; |
| 888 | } |
| 889 | dev->iflink = tunnel->parms.link; |
| 890 | } |
| 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | static int |
| 893 | ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) |
| 894 | { |
| 895 | int err = 0; |
| 896 | struct ip_tunnel_parm p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 897 | struct ip_tunnel_prl prl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | struct ip_tunnel *t; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 899 | struct net *net = dev_net(dev); |
| 900 | struct sit_net *sitn = net_generic(net, sit_net_id); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 901 | #ifdef CONFIG_IPV6_SIT_6RD |
| 902 | struct ip_tunnel_6rd ip6rd; |
| 903 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
| 905 | switch (cmd) { |
| 906 | case SIOCGETTUNNEL: |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 907 | #ifdef CONFIG_IPV6_SIT_6RD |
| 908 | case SIOCGET6RD: |
| 909 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | t = NULL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 911 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
| 913 | err = -EFAULT; |
| 914 | break; |
| 915 | } |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 916 | t = ipip6_tunnel_locate(net, &p, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
| 918 | if (t == NULL) |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 919 | t = netdev_priv(dev); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 920 | |
| 921 | err = -EFAULT; |
| 922 | if (cmd == SIOCGETTUNNEL) { |
| 923 | memcpy(&p, &t->parms, sizeof(p)); |
| 924 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, |
| 925 | sizeof(p))) |
| 926 | goto done; |
| 927 | #ifdef CONFIG_IPV6_SIT_6RD |
| 928 | } else { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 929 | ip6rd.prefix = t->ip6rd.prefix; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 930 | ip6rd.relay_prefix = t->ip6rd.relay_prefix; |
| 931 | ip6rd.prefixlen = t->ip6rd.prefixlen; |
| 932 | ip6rd.relay_prefixlen = t->ip6rd.relay_prefixlen; |
| 933 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, |
| 934 | sizeof(ip6rd))) |
| 935 | goto done; |
| 936 | #endif |
| 937 | } |
| 938 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | break; |
| 940 | |
| 941 | case SIOCADDTUNNEL: |
| 942 | case SIOCCHGTUNNEL: |
| 943 | err = -EPERM; |
| 944 | if (!capable(CAP_NET_ADMIN)) |
| 945 | goto done; |
| 946 | |
| 947 | err = -EFAULT; |
| 948 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 949 | goto done; |
| 950 | |
| 951 | err = -EINVAL; |
| 952 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPV6 || |
| 953 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
| 954 | goto done; |
| 955 | if (p.iph.ttl) |
| 956 | p.iph.frag_off |= htons(IP_DF); |
| 957 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 958 | t = ipip6_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 960 | if (dev != sitn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | if (t != NULL) { |
| 962 | if (t->dev != dev) { |
| 963 | err = -EEXIST; |
| 964 | break; |
| 965 | } |
| 966 | } else { |
| 967 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || |
| 968 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { |
| 969 | err = -EINVAL; |
| 970 | break; |
| 971 | } |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 972 | t = netdev_priv(dev); |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 973 | ipip6_tunnel_unlink(sitn, t); |
Pavel Emelyanov | 74b0b85 | 2010-10-27 05:43:53 +0000 | [diff] [blame] | 974 | synchronize_net(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | t->parms.iph.saddr = p.iph.saddr; |
| 976 | t->parms.iph.daddr = p.iph.daddr; |
| 977 | memcpy(dev->dev_addr, &p.iph.saddr, 4); |
| 978 | memcpy(dev->broadcast, &p.iph.daddr, 4); |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 979 | ipip6_tunnel_link(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | netdev_state_change(dev); |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | if (t) { |
| 985 | err = 0; |
| 986 | if (cmd == SIOCCHGTUNNEL) { |
| 987 | t->parms.iph.ttl = p.iph.ttl; |
| 988 | t->parms.iph.tos = p.iph.tos; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 989 | if (t->parms.link != p.link) { |
| 990 | t->parms.link = p.link; |
| 991 | ipip6_tunnel_bind_dev(dev); |
| 992 | netdev_state_change(dev); |
| 993 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | } |
| 995 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
| 996 | err = -EFAULT; |
| 997 | } else |
| 998 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); |
| 999 | break; |
| 1000 | |
| 1001 | case SIOCDELTUNNEL: |
| 1002 | err = -EPERM; |
| 1003 | if (!capable(CAP_NET_ADMIN)) |
| 1004 | goto done; |
| 1005 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1006 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | err = -EFAULT; |
| 1008 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 1009 | goto done; |
| 1010 | err = -ENOENT; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 1011 | if ((t = ipip6_tunnel_locate(net, &p, 0)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | goto done; |
| 1013 | err = -EPERM; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1014 | if (t == netdev_priv(sitn->fb_tunnel_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | goto done; |
| 1016 | dev = t->dev; |
| 1017 | } |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 1018 | unregister_netdevice(dev); |
| 1019 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | break; |
| 1021 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1022 | case SIOCGETPRL: |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 1023 | err = -EINVAL; |
| 1024 | if (dev == sitn->fb_tunnel_dev) |
| 1025 | goto done; |
| 1026 | err = -ENOENT; |
| 1027 | if (!(t = netdev_priv(dev))) |
| 1028 | goto done; |
| 1029 | err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data); |
| 1030 | break; |
| 1031 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1032 | case SIOCADDPRL: |
| 1033 | case SIOCDELPRL: |
| 1034 | case SIOCCHGPRL: |
| 1035 | err = -EPERM; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 1036 | if (!capable(CAP_NET_ADMIN)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1037 | goto done; |
| 1038 | err = -EINVAL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1039 | if (dev == sitn->fb_tunnel_dev) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1040 | goto done; |
| 1041 | err = -EFAULT; |
| 1042 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) |
| 1043 | goto done; |
| 1044 | err = -ENOENT; |
| 1045 | if (!(t = netdev_priv(dev))) |
| 1046 | goto done; |
| 1047 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1048 | switch (cmd) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1049 | case SIOCDELPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1050 | err = ipip6_tunnel_del_prl(t, &prl); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1051 | break; |
| 1052 | case SIOCADDPRL: |
| 1053 | case SIOCCHGPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1054 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1055 | break; |
| 1056 | } |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 1057 | netdev_state_change(dev); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1058 | break; |
| 1059 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1060 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1061 | case SIOCADD6RD: |
| 1062 | case SIOCCHG6RD: |
| 1063 | case SIOCDEL6RD: |
| 1064 | err = -EPERM; |
| 1065 | if (!capable(CAP_NET_ADMIN)) |
| 1066 | goto done; |
| 1067 | |
| 1068 | err = -EFAULT; |
| 1069 | if (copy_from_user(&ip6rd, ifr->ifr_ifru.ifru_data, |
| 1070 | sizeof(ip6rd))) |
| 1071 | goto done; |
| 1072 | |
| 1073 | t = netdev_priv(dev); |
| 1074 | |
| 1075 | if (cmd != SIOCDEL6RD) { |
| 1076 | struct in6_addr prefix; |
| 1077 | __be32 relay_prefix; |
| 1078 | |
| 1079 | err = -EINVAL; |
| 1080 | if (ip6rd.relay_prefixlen > 32 || |
| 1081 | ip6rd.prefixlen + (32 - ip6rd.relay_prefixlen) > 64) |
| 1082 | goto done; |
| 1083 | |
| 1084 | ipv6_addr_prefix(&prefix, &ip6rd.prefix, |
| 1085 | ip6rd.prefixlen); |
| 1086 | if (!ipv6_addr_equal(&prefix, &ip6rd.prefix)) |
| 1087 | goto done; |
YOSHIFUJI Hideaki / 吉藤英明 | 91b2a3f | 2009-10-11 03:45:13 +0000 | [diff] [blame] | 1088 | if (ip6rd.relay_prefixlen) |
| 1089 | relay_prefix = ip6rd.relay_prefix & |
| 1090 | htonl(0xffffffffUL << |
| 1091 | (32 - ip6rd.relay_prefixlen)); |
| 1092 | else |
| 1093 | relay_prefix = 0; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1094 | if (relay_prefix != ip6rd.relay_prefix) |
| 1095 | goto done; |
| 1096 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1097 | t->ip6rd.prefix = prefix; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1098 | t->ip6rd.relay_prefix = relay_prefix; |
| 1099 | t->ip6rd.prefixlen = ip6rd.prefixlen; |
| 1100 | t->ip6rd.relay_prefixlen = ip6rd.relay_prefixlen; |
| 1101 | } else |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 1102 | ipip6_tunnel_clone_6rd(dev, sitn); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1103 | |
| 1104 | err = 0; |
| 1105 | break; |
| 1106 | #endif |
| 1107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | default: |
| 1109 | err = -EINVAL; |
| 1110 | } |
| 1111 | |
| 1112 | done: |
| 1113 | return err; |
| 1114 | } |
| 1115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) |
| 1117 | { |
| 1118 | if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - sizeof(struct iphdr)) |
| 1119 | return -EINVAL; |
| 1120 | dev->mtu = new_mtu; |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1124 | static const struct net_device_ops ipip6_netdev_ops = { |
| 1125 | .ndo_uninit = ipip6_tunnel_uninit, |
| 1126 | .ndo_start_xmit = ipip6_tunnel_xmit, |
| 1127 | .ndo_do_ioctl = ipip6_tunnel_ioctl, |
| 1128 | .ndo_change_mtu = ipip6_tunnel_change_mtu, |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1129 | .ndo_get_stats = ipip6_get_stats, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1130 | }; |
| 1131 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1132 | static void ipip6_dev_free(struct net_device *dev) |
| 1133 | { |
| 1134 | free_percpu(dev->tstats); |
| 1135 | free_netdev(dev); |
| 1136 | } |
| 1137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | static void ipip6_tunnel_setup(struct net_device *dev) |
| 1139 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1140 | dev->netdev_ops = &ipip6_netdev_ops; |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1141 | dev->destructor = ipip6_dev_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
| 1143 | dev->type = ARPHRD_SIT; |
| 1144 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 1145 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | dev->flags = IFF_NOARP; |
Sascha Hlusiak | f2ba025 | 2009-07-11 20:30:52 -0700 | [diff] [blame] | 1147 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | dev->iflink = 0; |
| 1149 | dev->addr_len = 4; |
Pavel Emelyanov | 7a97146 | 2008-04-16 01:17:18 -0700 | [diff] [blame] | 1150 | dev->features |= NETIF_F_NETNS_LOCAL; |
Eric Dumazet | 8df40d1 | 2010-09-28 02:53:41 +0000 | [diff] [blame] | 1151 | dev->features |= NETIF_F_LLTX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | } |
| 1153 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1154 | static int ipip6_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1156 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
| 1158 | tunnel->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); |
| 1161 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
| 1162 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1163 | ipip6_tunnel_bind_dev(dev); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1164 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
| 1165 | if (!dev->tstats) |
| 1166 | return -ENOMEM; |
| 1167 | |
| 1168 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1171 | static int __net_init ipip6_fb_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1173 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | struct iphdr *iph = &tunnel->parms.iph; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1175 | struct net *net = dev_net(dev); |
| 1176 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | |
| 1178 | tunnel->dev = dev; |
| 1179 | strcpy(tunnel->parms.name, dev->name); |
| 1180 | |
| 1181 | iph->version = 4; |
| 1182 | iph->protocol = IPPROTO_IPV6; |
| 1183 | iph->ihl = 5; |
| 1184 | iph->ttl = 64; |
| 1185 | |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1186 | dev->tstats = alloc_percpu(struct pcpu_tstats); |
| 1187 | if (!dev->tstats) |
| 1188 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | dev_hold(dev); |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1190 | rcu_assign_pointer(sitn->tunnels_wc[0], tunnel); |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1191 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
Eric Dumazet | 6dcd814 | 2010-08-30 07:04:14 +0000 | [diff] [blame] | 1194 | static struct xfrm_tunnel sit_handler __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | .handler = ipip6_rcv, |
| 1196 | .err_handler = ipip6_err, |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1197 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | }; |
| 1199 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1200 | static void __net_exit sit_destroy_tunnels(struct sit_net *sitn, struct list_head *head) |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1201 | { |
| 1202 | int prio; |
| 1203 | |
| 1204 | for (prio = 1; prio < 4; prio++) { |
| 1205 | int h; |
| 1206 | for (h = 0; h < HASH_SIZE; h++) { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1207 | struct ip_tunnel *t; |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1208 | |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1209 | t = rtnl_dereference(sitn->tunnels[prio][h]); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1210 | while (t != NULL) { |
| 1211 | unregister_netdevice_queue(t->dev, head); |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1212 | t = rtnl_dereference(t->next); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1213 | } |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1214 | } |
| 1215 | } |
| 1216 | } |
| 1217 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1218 | static int __net_init sit_init_net(struct net *net) |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1219 | { |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1220 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Ted Feng | 72b3601 | 2011-12-08 00:46:21 +0000 | [diff] [blame] | 1221 | struct ip_tunnel *t; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1222 | int err; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1223 | |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1224 | sitn->tunnels[0] = sitn->tunnels_wc; |
| 1225 | sitn->tunnels[1] = sitn->tunnels_l; |
| 1226 | sitn->tunnels[2] = sitn->tunnels_r; |
| 1227 | sitn->tunnels[3] = sitn->tunnels_r_l; |
| 1228 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1229 | sitn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
| 1230 | ipip6_tunnel_setup); |
| 1231 | if (!sitn->fb_tunnel_dev) { |
| 1232 | err = -ENOMEM; |
| 1233 | goto err_alloc_dev; |
| 1234 | } |
Alexey Dobriyan | be77e59 | 2008-11-23 17:26:26 -0800 | [diff] [blame] | 1235 | dev_net_set(sitn->fb_tunnel_dev, net); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1236 | |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1237 | err = ipip6_fb_tunnel_init(sitn->fb_tunnel_dev); |
| 1238 | if (err) |
| 1239 | goto err_dev_free; |
| 1240 | |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 1241 | ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1242 | |
| 1243 | if ((err = register_netdev(sitn->fb_tunnel_dev))) |
| 1244 | goto err_reg_dev; |
| 1245 | |
Ted Feng | 72b3601 | 2011-12-08 00:46:21 +0000 | [diff] [blame] | 1246 | t = netdev_priv(sitn->fb_tunnel_dev); |
| 1247 | |
| 1248 | strcpy(t->parms.name, sitn->fb_tunnel_dev->name); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1249 | return 0; |
| 1250 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1251 | err_reg_dev: |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1252 | dev_put(sitn->fb_tunnel_dev); |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1253 | err_dev_free: |
| 1254 | ipip6_dev_free(sitn->fb_tunnel_dev); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1255 | err_alloc_dev: |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1256 | return err; |
| 1257 | } |
| 1258 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1259 | static void __net_exit sit_exit_net(struct net *net) |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1260 | { |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1261 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1262 | LIST_HEAD(list); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1263 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1264 | rtnl_lock(); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1265 | sit_destroy_tunnels(sitn, &list); |
| 1266 | unregister_netdevice_queue(sitn->fb_tunnel_dev, &list); |
| 1267 | unregister_netdevice_many(&list); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1268 | rtnl_unlock(); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1269 | } |
| 1270 | |
| 1271 | static struct pernet_operations sit_net_ops = { |
| 1272 | .init = sit_init_net, |
| 1273 | .exit = sit_exit_net, |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1274 | .id = &sit_net_id, |
| 1275 | .size = sizeof(struct sit_net), |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1276 | }; |
| 1277 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1278 | static void __exit sit_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | { |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1280 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1281 | |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1282 | unregister_pernet_device(&sit_net_ops); |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 1283 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } |
| 1285 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1286 | static int __init sit_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | { |
| 1288 | int err; |
| 1289 | |
| 1290 | printk(KERN_INFO "IPv6 over IPv4 tunneling driver\n"); |
| 1291 | |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1292 | err = register_pernet_device(&sit_net_ops); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1293 | if (err < 0) |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1294 | return err; |
| 1295 | err = xfrm4_tunnel_register(&sit_handler, AF_INET6); |
| 1296 | if (err < 0) { |
| 1297 | unregister_pernet_device(&sit_net_ops); |
| 1298 | printk(KERN_INFO "sit init: Can't add protocol\n"); |
| 1299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
Joerg Roedel | 989e5b9 | 2006-10-10 14:47:44 -0700 | [diff] [blame] | 1302 | |
| 1303 | module_init(sit_init); |
| 1304 | module_exit(sit_cleanup); |
Jan Dittmer | 39c8508 | 2006-10-13 15:05:53 -0700 | [diff] [blame] | 1305 | MODULE_LICENSE("GPL"); |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 1306 | MODULE_ALIAS_NETDEV("sit0"); |