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> |
| 31 | #include <asm/uaccess.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/netfilter_ipv4.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 34 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <net/sock.h> |
| 37 | #include <net/snmp.h> |
| 38 | |
| 39 | #include <net/ipv6.h> |
| 40 | #include <net/protocol.h> |
| 41 | #include <net/transp_v6.h> |
| 42 | #include <net/ip6_fib.h> |
| 43 | #include <net/ip6_route.h> |
| 44 | #include <net/ndisc.h> |
| 45 | #include <net/addrconf.h> |
| 46 | #include <net/ip.h> |
| 47 | #include <net/udp.h> |
| 48 | #include <net/icmp.h> |
| 49 | #include <net/ipip.h> |
| 50 | #include <net/inet_ecn.h> |
| 51 | #include <net/xfrm.h> |
| 52 | #include <net/dsfield.h> |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 53 | #include <net/net_namespace.h> |
| 54 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | /* |
| 57 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c |
| 58 | |
| 59 | For comments look at net/ipv4/ip_gre.c --ANK |
| 60 | */ |
| 61 | |
| 62 | #define HASH_SIZE 16 |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 63 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 65 | static void ipip6_fb_tunnel_init(struct net_device *dev); |
| 66 | static void 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); |
| 68 | |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 69 | static int sit_net_id; |
| 70 | struct sit_net { |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 71 | struct ip_tunnel *tunnels_r_l[HASH_SIZE]; |
| 72 | struct ip_tunnel *tunnels_r[HASH_SIZE]; |
| 73 | struct ip_tunnel *tunnels_l[HASH_SIZE]; |
| 74 | struct ip_tunnel *tunnels_wc[1]; |
| 75 | struct ip_tunnel **tunnels[4]; |
| 76 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 77 | struct net_device *fb_tunnel_dev; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 78 | }; |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | static DEFINE_RWLOCK(ipip6_lock); |
| 81 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 82 | static struct ip_tunnel * ipip6_tunnel_lookup(struct net *net, |
| 83 | __be32 remote, __be32 local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
| 85 | unsigned h0 = HASH(remote); |
| 86 | unsigned h1 = HASH(local); |
| 87 | struct ip_tunnel *t; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 88 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 90 | for (t = sitn->tunnels_r_l[h0^h1]; t; t = t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | if (local == t->parms.iph.saddr && |
| 92 | remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) |
| 93 | return t; |
| 94 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 95 | for (t = sitn->tunnels_r[h0]; t; t = t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP)) |
| 97 | return t; |
| 98 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 99 | for (t = sitn->tunnels_l[h1]; t; t = t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP)) |
| 101 | return t; |
| 102 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 103 | if ((t = sitn->tunnels_wc[0]) != NULL && (t->dev->flags&IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return t; |
| 105 | return NULL; |
| 106 | } |
| 107 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 108 | static struct ip_tunnel **__ipip6_bucket(struct sit_net *sitn, |
| 109 | struct ip_tunnel_parm *parms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 111 | __be32 remote = parms->iph.daddr; |
| 112 | __be32 local = parms->iph.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | unsigned h = 0; |
| 114 | int prio = 0; |
| 115 | |
| 116 | if (remote) { |
| 117 | prio |= 2; |
| 118 | h ^= HASH(remote); |
| 119 | } |
| 120 | if (local) { |
| 121 | prio |= 1; |
| 122 | h ^= HASH(local); |
| 123 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 124 | return &sitn->tunnels[prio][h]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 127 | static inline struct ip_tunnel **ipip6_bucket(struct sit_net *sitn, |
| 128 | struct ip_tunnel *t) |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 129 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 130 | return __ipip6_bucket(sitn, &t->parms); |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 131 | } |
| 132 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 133 | 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] | 134 | { |
| 135 | struct ip_tunnel **tp; |
| 136 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 137 | for (tp = ipip6_bucket(sitn, t); *tp; tp = &(*tp)->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | if (t == *tp) { |
| 139 | write_lock_bh(&ipip6_lock); |
| 140 | *tp = t->next; |
| 141 | write_unlock_bh(&ipip6_lock); |
| 142 | break; |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 147 | 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] | 148 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 149 | struct ip_tunnel **tp = ipip6_bucket(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | t->next = *tp; |
| 152 | write_lock_bh(&ipip6_lock); |
| 153 | *tp = t; |
| 154 | write_unlock_bh(&ipip6_lock); |
| 155 | } |
| 156 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 157 | static struct ip_tunnel * ipip6_tunnel_locate(struct net *net, |
| 158 | struct ip_tunnel_parm *parms, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | { |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 160 | __be32 remote = parms->iph.daddr; |
| 161 | __be32 local = parms->iph.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | struct ip_tunnel *t, **tp, *nt; |
| 163 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | char name[IFNAMSIZ]; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 165 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 167 | for (tp = __ipip6_bucket(sitn, parms); (t = *tp) != NULL; tp = &t->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) |
| 169 | return t; |
| 170 | } |
| 171 | if (!create) |
| 172 | goto failed; |
| 173 | |
| 174 | if (parms->name[0]) |
| 175 | strlcpy(name, parms->name, IFNAMSIZ); |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 176 | else |
| 177 | sprintf(name, "sit%%d"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | dev = alloc_netdev(sizeof(*t), name, ipip6_tunnel_setup); |
| 180 | if (dev == NULL) |
| 181 | return NULL; |
| 182 | |
Pavel Emelyanov | 7a97146 | 2008-04-16 01:17:18 -0700 | [diff] [blame] | 183 | dev_net_set(dev, net); |
| 184 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 185 | if (strchr(name, '%')) { |
| 186 | if (dev_alloc_name(dev, name) < 0) |
| 187 | goto failed_free; |
| 188 | } |
| 189 | |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 190 | nt = netdev_priv(dev); |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | nt->parms = *parms; |
Bjørn Mork | 1b1d8f7 | 2009-03-18 18:56:54 -0700 | [diff] [blame] | 193 | ipip6_tunnel_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 195 | if (parms->i_flags & SIT_ISATAP) |
| 196 | dev->priv_flags |= IFF_ISATAP; |
| 197 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 198 | if (register_netdevice(dev) < 0) |
| 199 | goto failed_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | dev_hold(dev); |
| 202 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 203 | ipip6_tunnel_link(sitn, nt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | return nt; |
| 205 | |
Pavel Emelyanov | b37d428 | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 206 | failed_free: |
| 207 | free_netdev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | failed: |
| 209 | return NULL; |
| 210 | } |
| 211 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 212 | static struct ip_tunnel_prl_entry * |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 213 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 214 | { |
| 215 | struct ip_tunnel_prl_entry *p = (struct ip_tunnel_prl_entry *)NULL; |
| 216 | |
| 217 | for (p = t->prl; p; p = p->next) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 218 | if (p->addr == addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 219 | break; |
| 220 | return p; |
| 221 | |
| 222 | } |
| 223 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 224 | static int ipip6_tunnel_get_prl(struct ip_tunnel *t, |
| 225 | struct ip_tunnel_prl __user *a) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 226 | { |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 227 | struct ip_tunnel_prl kprl, *kp; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 228 | struct ip_tunnel_prl_entry *prl; |
| 229 | unsigned int cmax, c = 0, ca, len; |
| 230 | int ret = 0; |
| 231 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 232 | if (copy_from_user(&kprl, a, sizeof(kprl))) |
| 233 | return -EFAULT; |
| 234 | cmax = kprl.datalen / sizeof(kprl); |
| 235 | if (cmax > 1 && kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 236 | cmax = 1; |
| 237 | |
| 238 | /* For simple GET or for root users, |
| 239 | * we try harder to allocate. |
| 240 | */ |
| 241 | kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ? |
| 242 | kcalloc(cmax, sizeof(*kp), GFP_KERNEL) : |
| 243 | NULL; |
| 244 | |
| 245 | read_lock(&ipip6_lock); |
| 246 | |
| 247 | ca = t->prl_count < cmax ? t->prl_count : cmax; |
| 248 | |
| 249 | if (!kp) { |
| 250 | /* We don't try hard to allocate much memory for |
| 251 | * non-root users. |
| 252 | * For root users, retry allocating enough memory for |
| 253 | * the answer. |
| 254 | */ |
| 255 | kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC); |
| 256 | if (!kp) { |
| 257 | ret = -ENOMEM; |
| 258 | goto out; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | c = 0; |
| 263 | for (prl = t->prl; prl; prl = prl->next) { |
| 264 | if (c > cmax) |
| 265 | break; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 266 | if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 267 | continue; |
| 268 | kp[c].addr = prl->addr; |
| 269 | kp[c].flags = prl->flags; |
| 270 | c++; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 271 | if (kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 272 | break; |
| 273 | } |
| 274 | out: |
| 275 | read_unlock(&ipip6_lock); |
| 276 | |
| 277 | len = sizeof(*kp) * c; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 278 | ret = 0; |
| 279 | if ((len && copy_to_user(a + 1, kp, len)) || put_user(len, &a->datalen)) |
| 280 | ret = -EFAULT; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 281 | |
| 282 | kfree(kp); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 283 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 284 | return ret; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 285 | } |
| 286 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 287 | static int |
| 288 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) |
| 289 | { |
| 290 | struct ip_tunnel_prl_entry *p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 291 | int err = 0; |
| 292 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 293 | if (a->addr == htonl(INADDR_ANY)) |
| 294 | return -EINVAL; |
| 295 | |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 296 | write_lock(&ipip6_lock); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 297 | |
| 298 | for (p = t->prl; p; p = p->next) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 299 | if (p->addr == a->addr) { |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 300 | if (chg) |
| 301 | goto update; |
| 302 | err = -EEXIST; |
| 303 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 304 | } |
| 305 | } |
| 306 | |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 307 | if (chg) { |
| 308 | err = -ENXIO; |
| 309 | goto out; |
| 310 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 311 | |
| 312 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 313 | if (!p) { |
| 314 | err = -ENOBUFS; |
| 315 | goto out; |
| 316 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 317 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 318 | p->next = t->prl; |
| 319 | t->prl = p; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 320 | t->prl_count++; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 321 | update: |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 322 | p->addr = a->addr; |
| 323 | p->flags = a->flags; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 324 | out: |
| 325 | write_unlock(&ipip6_lock); |
| 326 | return err; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | static int |
| 330 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) |
| 331 | { |
| 332 | struct ip_tunnel_prl_entry *x, **p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 333 | int err = 0; |
| 334 | |
| 335 | write_lock(&ipip6_lock); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 336 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 337 | if (a && a->addr != htonl(INADDR_ANY)) { |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 338 | for (p = &t->prl; *p; p = &(*p)->next) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 339 | if ((*p)->addr == a->addr) { |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 340 | x = *p; |
| 341 | *p = x->next; |
| 342 | kfree(x); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 343 | t->prl_count--; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 344 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 345 | } |
| 346 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 347 | err = -ENXIO; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 348 | } else { |
| 349 | while (t->prl) { |
| 350 | x = t->prl; |
| 351 | t->prl = t->prl->next; |
| 352 | kfree(x); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 353 | t->prl_count--; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 354 | } |
| 355 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 356 | out: |
| 357 | write_unlock(&ipip6_lock); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 358 | return 0; |
| 359 | } |
| 360 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 361 | static int |
| 362 | isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t) |
| 363 | { |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 364 | struct ip_tunnel_prl_entry *p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 365 | int ok = 1; |
| 366 | |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 367 | read_lock(&ipip6_lock); |
| 368 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 369 | if (p) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 370 | if (p->flags & PRL_DEFAULT) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 371 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; |
| 372 | else |
| 373 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; |
| 374 | } else { |
| 375 | struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; |
| 376 | if (ipv6_addr_is_isatap(addr6) && |
| 377 | (addr6->s6_addr32[3] == iph->saddr) && |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 378 | ipv6_chk_prefix(addr6, t->dev)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 379 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; |
| 380 | else |
| 381 | ok = 0; |
| 382 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 383 | read_unlock(&ipip6_lock); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 384 | return ok; |
| 385 | } |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | static void ipip6_tunnel_uninit(struct net_device *dev) |
| 388 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 389 | struct net *net = dev_net(dev); |
| 390 | struct sit_net *sitn = net_generic(net, sit_net_id); |
| 391 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 392 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | write_lock_bh(&ipip6_lock); |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 394 | sitn->tunnels_wc[0] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | write_unlock_bh(&ipip6_lock); |
| 396 | dev_put(dev); |
| 397 | } else { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 398 | ipip6_tunnel_unlink(sitn, netdev_priv(dev)); |
YOSHIFUJI Hideaki | 02e10b9 | 2008-04-10 15:41:27 +0900 | [diff] [blame] | 399 | ipip6_tunnel_del_prl(netdev_priv(dev), NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | dev_put(dev); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 405 | static int ipip6_err(struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Rami Rosen | 071f92d | 2008-05-21 17:47:54 -0700 | [diff] [blame] | 408 | /* All the routers (except for Linux) return only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | 8 bytes of packet payload. It means, that precise relaying of |
| 410 | ICMP in the real Internet is absolutely infeasible. |
| 411 | */ |
| 412 | struct iphdr *iph = (struct iphdr*)skb->data; |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 413 | const int type = icmp_hdr(skb)->type; |
| 414 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | struct ip_tunnel *t; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 416 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | switch (type) { |
| 419 | default: |
| 420 | case ICMP_PARAMETERPROB: |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 421 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | case ICMP_DEST_UNREACH: |
| 424 | switch (code) { |
| 425 | case ICMP_SR_FAILED: |
| 426 | case ICMP_PORT_UNREACH: |
| 427 | /* Impossible event. */ |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 428 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | case ICMP_FRAG_NEEDED: |
| 430 | /* Soft state for pmtu is maintained by IP core. */ |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 431 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | default: |
| 433 | /* All others are translated to HOST_UNREACH. |
| 434 | rfc2003 contains "deep thoughts" about NET_UNREACH, |
| 435 | I believe they are just ether pollution. --ANK |
| 436 | */ |
| 437 | break; |
| 438 | } |
| 439 | break; |
| 440 | case ICMP_TIME_EXCEEDED: |
| 441 | if (code != ICMP_EXC_TTL) |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 442 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | break; |
| 444 | } |
| 445 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 446 | err = -ENOENT; |
| 447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | read_lock(&ipip6_lock); |
Pavel Emelyanov | fcee5ec | 2008-04-16 01:15:59 -0700 | [diff] [blame] | 449 | t = ipip6_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (t == NULL || t->parms.iph.daddr == 0) |
| 451 | goto out; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 452 | |
| 453 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
| 455 | goto out; |
| 456 | |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 457 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | t->err_count++; |
| 459 | else |
| 460 | t->err_count = 1; |
| 461 | t->err_time = jiffies; |
| 462 | out: |
| 463 | read_unlock(&ipip6_lock); |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 464 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb) |
| 468 | { |
| 469 | if (INET_ECN_is_ce(iph->tos)) |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 470 | IP6_ECN_set_ce(ipv6_hdr(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static int ipip6_rcv(struct sk_buff *skb) |
| 474 | { |
| 475 | struct iphdr *iph; |
| 476 | struct ip_tunnel *tunnel; |
| 477 | |
| 478 | if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) |
| 479 | goto out; |
| 480 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 481 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | read_lock(&ipip6_lock); |
Pavel Emelyanov | fcee5ec | 2008-04-16 01:15:59 -0700 | [diff] [blame] | 484 | if ((tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 485 | iph->saddr, iph->daddr)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | secpath_reset(skb); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 487 | skb->mac_header = skb->network_header; |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 488 | skb_reset_network_header(skb); |
Patrick McHardy | 8cdfab8 | 2006-01-06 23:04:01 -0800 | [diff] [blame] | 489 | IPCB(skb)->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | skb->protocol = htons(ETH_P_IPV6); |
| 491 | skb->pkt_type = PACKET_HOST; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 492 | |
| 493 | if ((tunnel->dev->priv_flags & IFF_ISATAP) && |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 494 | !isatap_chksrc(skb, iph, tunnel)) { |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 495 | tunnel->dev->stats.rx_errors++; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 496 | read_unlock(&ipip6_lock); |
| 497 | kfree_skb(skb); |
| 498 | return 0; |
| 499 | } |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 500 | tunnel->dev->stats.rx_packets++; |
| 501 | tunnel->dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | skb->dev = tunnel->dev; |
| 503 | dst_release(skb->dst); |
| 504 | skb->dst = NULL; |
| 505 | nf_reset(skb); |
| 506 | ipip6_ecn_decapsulate(iph, skb); |
| 507 | netif_rx(skb); |
| 508 | read_unlock(&ipip6_lock); |
| 509 | return 0; |
| 510 | } |
| 511 | |
Herbert Xu | 45af08b | 2006-04-05 22:31:19 -0700 | [diff] [blame] | 512 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | read_unlock(&ipip6_lock); |
| 514 | out: |
David S. Miller | 36ca34c | 2008-05-08 23:40:26 -0700 | [diff] [blame] | 515 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | /* Returns the embedded IPv4 address if the IPv6 address |
| 520 | comes from 6to4 (RFC 3056) addr space */ |
| 521 | |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 522 | static inline __be32 try_6to4(struct in6_addr *v6dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | { |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 524 | __be32 dst = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | if (v6dst->s6_addr16[0] == htons(0x2002)) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 527 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | memcpy(&dst, &v6dst->s6_addr16[1], 4); |
| 529 | } |
| 530 | return dst; |
| 531 | } |
| 532 | |
| 533 | /* |
| 534 | * This function assumes it is being called from dev_queue_xmit() |
| 535 | * and that skb is filled properly by that function. |
| 536 | */ |
| 537 | |
| 538 | static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
| 539 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 540 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 541 | struct net_device_stats *stats = &tunnel->dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | struct iphdr *tiph = &tunnel->parms.iph; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 543 | struct ipv6hdr *iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | u8 tos = tunnel->parms.iph.tos; |
| 545 | struct rtable *rt; /* Route to the other host */ |
| 546 | struct net_device *tdev; /* Device to other host */ |
| 547 | struct iphdr *iph; /* Our new IP header */ |
Chuck Lever | c2636b4 | 2007-10-23 21:07:32 -0700 | [diff] [blame] | 548 | unsigned int max_headroom; /* The extra header space needed */ |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 549 | __be32 dst = tiph->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | int mtu; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 551 | struct in6_addr *addr6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | int addr_type; |
| 553 | |
| 554 | if (tunnel->recursion++) { |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 555 | stats->collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | goto tx_error; |
| 557 | } |
| 558 | |
| 559 | if (skb->protocol != htons(ETH_P_IPV6)) |
| 560 | goto tx_error; |
| 561 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 562 | /* ISATAP (RFC4214) - must come before 6to4 */ |
| 563 | if (dev->priv_flags & IFF_ISATAP) { |
| 564 | struct neighbour *neigh = NULL; |
| 565 | |
| 566 | if (skb->dst) |
| 567 | neigh = skb->dst->neighbour; |
| 568 | |
| 569 | if (neigh == NULL) { |
| 570 | if (net_ratelimit()) |
| 571 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); |
| 572 | goto tx_error; |
| 573 | } |
| 574 | |
| 575 | addr6 = (struct in6_addr*)&neigh->primary_key; |
| 576 | addr_type = ipv6_addr_type(addr6); |
| 577 | |
| 578 | if ((addr_type & IPV6_ADDR_UNICAST) && |
| 579 | ipv6_addr_is_isatap(addr6)) |
| 580 | dst = addr6->s6_addr32[3]; |
| 581 | else |
| 582 | goto tx_error; |
| 583 | } |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | if (!dst) |
| 586 | dst = try_6to4(&iph6->daddr); |
| 587 | |
| 588 | if (!dst) { |
| 589 | struct neighbour *neigh = NULL; |
| 590 | |
| 591 | if (skb->dst) |
| 592 | neigh = skb->dst->neighbour; |
| 593 | |
| 594 | if (neigh == NULL) { |
| 595 | if (net_ratelimit()) |
| 596 | printk(KERN_DEBUG "sit: nexthop == NULL\n"); |
| 597 | goto tx_error; |
| 598 | } |
| 599 | |
| 600 | addr6 = (struct in6_addr*)&neigh->primary_key; |
| 601 | addr_type = ipv6_addr_type(addr6); |
| 602 | |
| 603 | if (addr_type == IPV6_ADDR_ANY) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 604 | addr6 = &ipv6_hdr(skb)->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | addr_type = ipv6_addr_type(addr6); |
| 606 | } |
| 607 | |
| 608 | if ((addr_type & IPV6_ADDR_COMPATv4) == 0) |
| 609 | goto tx_error_icmp; |
| 610 | |
| 611 | dst = addr6->s6_addr32[3]; |
| 612 | } |
| 613 | |
| 614 | { |
| 615 | struct flowi fl = { .nl_u = { .ip4_u = |
| 616 | { .daddr = dst, |
| 617 | .saddr = tiph->saddr, |
| 618 | .tos = RT_TOS(tos) } }, |
| 619 | .oif = tunnel->parms.link, |
| 620 | .proto = IPPROTO_IPV6 }; |
Pavel Emelyanov | 907a08c | 2008-04-16 01:16:58 -0700 | [diff] [blame] | 621 | if (ip_route_output_key(dev_net(dev), &rt, &fl)) { |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 622 | stats->tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | goto tx_error_icmp; |
| 624 | } |
| 625 | } |
| 626 | if (rt->rt_type != RTN_UNICAST) { |
| 627 | ip_rt_put(rt); |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 628 | stats->tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | goto tx_error_icmp; |
| 630 | } |
| 631 | tdev = rt->u.dst.dev; |
| 632 | |
| 633 | if (tdev == dev) { |
| 634 | ip_rt_put(rt); |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 635 | stats->collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | goto tx_error; |
| 637 | } |
| 638 | |
| 639 | if (tiph->frag_off) |
| 640 | mtu = dst_mtu(&rt->u.dst) - sizeof(struct iphdr); |
| 641 | else |
| 642 | mtu = skb->dst ? dst_mtu(skb->dst) : dev->mtu; |
| 643 | |
| 644 | if (mtu < 68) { |
Pavel Emelyanov | 4eecc10 | 2008-05-21 14:15:46 -0700 | [diff] [blame] | 645 | stats->collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | ip_rt_put(rt); |
| 647 | goto tx_error; |
| 648 | } |
| 649 | if (mtu < IPV6_MIN_MTU) |
| 650 | mtu = IPV6_MIN_MTU; |
| 651 | if (tunnel->parms.iph.daddr && skb->dst) |
| 652 | skb->dst->ops->update_pmtu(skb->dst, mtu); |
| 653 | |
| 654 | if (skb->len > mtu) { |
| 655 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev); |
| 656 | ip_rt_put(rt); |
| 657 | goto tx_error; |
| 658 | } |
| 659 | |
| 660 | if (tunnel->err_count > 0) { |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 661 | if (time_before(jiffies, |
| 662 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | tunnel->err_count--; |
| 664 | dst_link_failure(skb); |
| 665 | } else |
| 666 | tunnel->err_count = 0; |
| 667 | } |
| 668 | |
| 669 | /* |
| 670 | * Okay, now see if we can stuff it in the buffer as-is. |
| 671 | */ |
| 672 | max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); |
| 673 | |
Patrick McHardy | cfbba49 | 2007-07-09 15:33:40 -0700 | [diff] [blame] | 674 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
| 675 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
| 677 | if (!new_skb) { |
| 678 | ip_rt_put(rt); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 679 | stats->tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | dev_kfree_skb(skb); |
| 681 | tunnel->recursion--; |
| 682 | return 0; |
| 683 | } |
| 684 | if (skb->sk) |
| 685 | skb_set_owner_w(new_skb, skb->sk); |
| 686 | dev_kfree_skb(skb); |
| 687 | skb = new_skb; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 688 | iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
| 690 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 691 | skb->transport_header = skb->network_header; |
Arnaldo Carvalho de Melo | e2d1bca | 2007-04-10 20:46:21 -0700 | [diff] [blame] | 692 | skb_push(skb, sizeof(struct iphdr)); |
| 693 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
Patrick McHardy | 8cdfab8 | 2006-01-06 23:04:01 -0800 | [diff] [blame] | 695 | IPCB(skb)->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | dst_release(skb->dst); |
| 697 | skb->dst = &rt->u.dst; |
| 698 | |
| 699 | /* |
| 700 | * Push down and install the IPIP header. |
| 701 | */ |
| 702 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 703 | iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | iph->version = 4; |
| 705 | iph->ihl = sizeof(struct iphdr)>>2; |
| 706 | if (mtu > IPV6_MIN_MTU) |
| 707 | iph->frag_off = htons(IP_DF); |
| 708 | else |
| 709 | iph->frag_off = 0; |
| 710 | |
| 711 | iph->protocol = IPPROTO_IPV6; |
| 712 | iph->tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); |
| 713 | iph->daddr = rt->rt_dst; |
| 714 | iph->saddr = rt->rt_src; |
| 715 | |
| 716 | if ((iph->ttl = tiph->ttl) == 0) |
| 717 | iph->ttl = iph6->hop_limit; |
| 718 | |
| 719 | nf_reset(skb); |
| 720 | |
| 721 | IPTUNNEL_XMIT(); |
| 722 | tunnel->recursion--; |
| 723 | return 0; |
| 724 | |
| 725 | tx_error_icmp: |
| 726 | dst_link_failure(skb); |
| 727 | tx_error: |
| 728 | stats->tx_errors++; |
| 729 | dev_kfree_skb(skb); |
| 730 | tunnel->recursion--; |
| 731 | return 0; |
| 732 | } |
| 733 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 734 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
| 735 | { |
| 736 | struct net_device *tdev = NULL; |
| 737 | struct ip_tunnel *tunnel; |
| 738 | struct iphdr *iph; |
| 739 | |
| 740 | tunnel = netdev_priv(dev); |
| 741 | iph = &tunnel->parms.iph; |
| 742 | |
| 743 | if (iph->daddr) { |
| 744 | struct flowi fl = { .nl_u = { .ip4_u = |
| 745 | { .daddr = iph->daddr, |
| 746 | .saddr = iph->saddr, |
| 747 | .tos = RT_TOS(iph->tos) } }, |
| 748 | .oif = tunnel->parms.link, |
| 749 | .proto = IPPROTO_IPV6 }; |
| 750 | struct rtable *rt; |
Pavel Emelyanov | 907a08c | 2008-04-16 01:16:58 -0700 | [diff] [blame] | 751 | if (!ip_route_output_key(dev_net(dev), &rt, &fl)) { |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 752 | tdev = rt->u.dst.dev; |
| 753 | ip_rt_put(rt); |
| 754 | } |
| 755 | dev->flags |= IFF_POINTOPOINT; |
| 756 | } |
| 757 | |
| 758 | if (!tdev && tunnel->parms.link) |
Pavel Emelyanov | 907a08c | 2008-04-16 01:16:58 -0700 | [diff] [blame] | 759 | tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link); |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 760 | |
| 761 | if (tdev) { |
| 762 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); |
| 763 | dev->mtu = tdev->mtu - sizeof(struct iphdr); |
| 764 | if (dev->mtu < IPV6_MIN_MTU) |
| 765 | dev->mtu = IPV6_MIN_MTU; |
| 766 | } |
| 767 | dev->iflink = tunnel->parms.link; |
| 768 | } |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | static int |
| 771 | ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) |
| 772 | { |
| 773 | int err = 0; |
| 774 | struct ip_tunnel_parm p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 775 | struct ip_tunnel_prl prl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | struct ip_tunnel *t; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 777 | struct net *net = dev_net(dev); |
| 778 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | switch (cmd) { |
| 781 | case SIOCGETTUNNEL: |
| 782 | t = NULL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 783 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
| 785 | err = -EFAULT; |
| 786 | break; |
| 787 | } |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 788 | t = ipip6_tunnel_locate(net, &p, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | if (t == NULL) |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 791 | t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | memcpy(&p, &t->parms, sizeof(p)); |
| 793 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
| 794 | err = -EFAULT; |
| 795 | break; |
| 796 | |
| 797 | case SIOCADDTUNNEL: |
| 798 | case SIOCCHGTUNNEL: |
| 799 | err = -EPERM; |
| 800 | if (!capable(CAP_NET_ADMIN)) |
| 801 | goto done; |
| 802 | |
| 803 | err = -EFAULT; |
| 804 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 805 | goto done; |
| 806 | |
| 807 | err = -EINVAL; |
| 808 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPV6 || |
| 809 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
| 810 | goto done; |
| 811 | if (p.iph.ttl) |
| 812 | p.iph.frag_off |= htons(IP_DF); |
| 813 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 814 | t = ipip6_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 816 | if (dev != sitn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | if (t != NULL) { |
| 818 | if (t->dev != dev) { |
| 819 | err = -EEXIST; |
| 820 | break; |
| 821 | } |
| 822 | } else { |
| 823 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || |
| 824 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { |
| 825 | err = -EINVAL; |
| 826 | break; |
| 827 | } |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 828 | t = netdev_priv(dev); |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 829 | ipip6_tunnel_unlink(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | t->parms.iph.saddr = p.iph.saddr; |
| 831 | t->parms.iph.daddr = p.iph.daddr; |
| 832 | memcpy(dev->dev_addr, &p.iph.saddr, 4); |
| 833 | memcpy(dev->broadcast, &p.iph.daddr, 4); |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 834 | ipip6_tunnel_link(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | netdev_state_change(dev); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | if (t) { |
| 840 | err = 0; |
| 841 | if (cmd == SIOCCHGTUNNEL) { |
| 842 | t->parms.iph.ttl = p.iph.ttl; |
| 843 | t->parms.iph.tos = p.iph.tos; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 844 | if (t->parms.link != p.link) { |
| 845 | t->parms.link = p.link; |
| 846 | ipip6_tunnel_bind_dev(dev); |
| 847 | netdev_state_change(dev); |
| 848 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | } |
| 850 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
| 851 | err = -EFAULT; |
| 852 | } else |
| 853 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); |
| 854 | break; |
| 855 | |
| 856 | case SIOCDELTUNNEL: |
| 857 | err = -EPERM; |
| 858 | if (!capable(CAP_NET_ADMIN)) |
| 859 | goto done; |
| 860 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 861 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | err = -EFAULT; |
| 863 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 864 | goto done; |
| 865 | err = -ENOENT; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 866 | if ((t = ipip6_tunnel_locate(net, &p, 0)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | goto done; |
| 868 | err = -EPERM; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 869 | if (t == netdev_priv(sitn->fb_tunnel_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | goto done; |
| 871 | dev = t->dev; |
| 872 | } |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 873 | unregister_netdevice(dev); |
| 874 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | break; |
| 876 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 877 | case SIOCGETPRL: |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 878 | err = -EINVAL; |
| 879 | if (dev == sitn->fb_tunnel_dev) |
| 880 | goto done; |
| 881 | err = -ENOENT; |
| 882 | if (!(t = netdev_priv(dev))) |
| 883 | goto done; |
| 884 | err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data); |
| 885 | break; |
| 886 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 887 | case SIOCADDPRL: |
| 888 | case SIOCDELPRL: |
| 889 | case SIOCCHGPRL: |
| 890 | err = -EPERM; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 891 | if (!capable(CAP_NET_ADMIN)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 892 | goto done; |
| 893 | err = -EINVAL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 894 | if (dev == sitn->fb_tunnel_dev) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 895 | goto done; |
| 896 | err = -EFAULT; |
| 897 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) |
| 898 | goto done; |
| 899 | err = -ENOENT; |
| 900 | if (!(t = netdev_priv(dev))) |
| 901 | goto done; |
| 902 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 903 | switch (cmd) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 904 | case SIOCDELPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 905 | err = ipip6_tunnel_del_prl(t, &prl); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 906 | break; |
| 907 | case SIOCADDPRL: |
| 908 | case SIOCCHGPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 909 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 910 | break; |
| 911 | } |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 912 | netdev_state_change(dev); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 913 | break; |
| 914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | default: |
| 916 | err = -EINVAL; |
| 917 | } |
| 918 | |
| 919 | done: |
| 920 | return err; |
| 921 | } |
| 922 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) |
| 924 | { |
| 925 | if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - sizeof(struct iphdr)) |
| 926 | return -EINVAL; |
| 927 | dev->mtu = new_mtu; |
| 928 | return 0; |
| 929 | } |
| 930 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 931 | static const struct net_device_ops ipip6_netdev_ops = { |
| 932 | .ndo_uninit = ipip6_tunnel_uninit, |
| 933 | .ndo_start_xmit = ipip6_tunnel_xmit, |
| 934 | .ndo_do_ioctl = ipip6_tunnel_ioctl, |
| 935 | .ndo_change_mtu = ipip6_tunnel_change_mtu, |
| 936 | }; |
| 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | static void ipip6_tunnel_setup(struct net_device *dev) |
| 939 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 940 | dev->netdev_ops = &ipip6_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | dev->destructor = free_netdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | dev->type = ARPHRD_SIT; |
| 944 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 945 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | dev->flags = IFF_NOARP; |
| 947 | dev->iflink = 0; |
| 948 | dev->addr_len = 4; |
Pavel Emelyanov | 7a97146 | 2008-04-16 01:17:18 -0700 | [diff] [blame] | 949 | dev->features |= NETIF_F_NETNS_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
| 951 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 952 | static void ipip6_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 954 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | |
| 956 | tunnel->dev = dev; |
| 957 | strcpy(tunnel->parms.name, dev->name); |
| 958 | |
| 959 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); |
| 960 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
| 961 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 962 | ipip6_tunnel_bind_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
| 964 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 965 | static void ipip6_fb_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 967 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | struct iphdr *iph = &tunnel->parms.iph; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 969 | struct net *net = dev_net(dev); |
| 970 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
| 972 | tunnel->dev = dev; |
| 973 | strcpy(tunnel->parms.name, dev->name); |
| 974 | |
| 975 | iph->version = 4; |
| 976 | iph->protocol = IPPROTO_IPV6; |
| 977 | iph->ihl = 5; |
| 978 | iph->ttl = 64; |
| 979 | |
| 980 | dev_hold(dev); |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 981 | sitn->tunnels_wc[0] = tunnel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | } |
| 983 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 984 | static struct xfrm_tunnel sit_handler = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | .handler = ipip6_rcv, |
| 986 | .err_handler = ipip6_err, |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 987 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | }; |
| 989 | |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 990 | static void sit_destroy_tunnels(struct sit_net *sitn) |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 991 | { |
| 992 | int prio; |
| 993 | |
| 994 | for (prio = 1; prio < 4; prio++) { |
| 995 | int h; |
| 996 | for (h = 0; h < HASH_SIZE; h++) { |
| 997 | struct ip_tunnel *t; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 998 | while ((t = sitn->tunnels[prio][h]) != NULL) |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 999 | unregister_netdevice(t->dev); |
| 1000 | } |
| 1001 | } |
| 1002 | } |
| 1003 | |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1004 | static int sit_init_net(struct net *net) |
| 1005 | { |
| 1006 | int err; |
| 1007 | struct sit_net *sitn; |
| 1008 | |
| 1009 | err = -ENOMEM; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1010 | sitn = kzalloc(sizeof(struct sit_net), GFP_KERNEL); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1011 | if (sitn == NULL) |
| 1012 | goto err_alloc; |
| 1013 | |
| 1014 | err = net_assign_generic(net, sit_net_id, sitn); |
| 1015 | if (err < 0) |
| 1016 | goto err_assign; |
| 1017 | |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1018 | sitn->tunnels[0] = sitn->tunnels_wc; |
| 1019 | sitn->tunnels[1] = sitn->tunnels_l; |
| 1020 | sitn->tunnels[2] = sitn->tunnels_r; |
| 1021 | sitn->tunnels[3] = sitn->tunnels_r_l; |
| 1022 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1023 | sitn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
| 1024 | ipip6_tunnel_setup); |
| 1025 | if (!sitn->fb_tunnel_dev) { |
| 1026 | err = -ENOMEM; |
| 1027 | goto err_alloc_dev; |
| 1028 | } |
Alexey Dobriyan | be77e59 | 2008-11-23 17:26:26 -0800 | [diff] [blame] | 1029 | dev_net_set(sitn->fb_tunnel_dev, net); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1030 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1031 | ipip6_fb_tunnel_init(sitn->fb_tunnel_dev); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1032 | |
| 1033 | if ((err = register_netdev(sitn->fb_tunnel_dev))) |
| 1034 | goto err_reg_dev; |
| 1035 | |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1036 | return 0; |
| 1037 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1038 | err_reg_dev: |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1039 | dev_put(sitn->fb_tunnel_dev); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1040 | free_netdev(sitn->fb_tunnel_dev); |
| 1041 | err_alloc_dev: |
| 1042 | /* nothing */ |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1043 | err_assign: |
| 1044 | kfree(sitn); |
| 1045 | err_alloc: |
| 1046 | return err; |
| 1047 | } |
| 1048 | |
| 1049 | static void sit_exit_net(struct net *net) |
| 1050 | { |
| 1051 | struct sit_net *sitn; |
| 1052 | |
| 1053 | sitn = net_generic(net, sit_net_id); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1054 | rtnl_lock(); |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1055 | sit_destroy_tunnels(sitn); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1056 | unregister_netdevice(sitn->fb_tunnel_dev); |
| 1057 | rtnl_unlock(); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1058 | kfree(sitn); |
| 1059 | } |
| 1060 | |
| 1061 | static struct pernet_operations sit_net_ops = { |
| 1062 | .init = sit_init_net, |
| 1063 | .exit = sit_exit_net, |
| 1064 | }; |
| 1065 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1066 | static void __exit sit_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | { |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1068 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1069 | |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1070 | unregister_pernet_gen_device(sit_net_id, &sit_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1073 | static int __init sit_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | { |
| 1075 | int err; |
| 1076 | |
| 1077 | printk(KERN_INFO "IPv6 over IPv4 tunneling driver\n"); |
| 1078 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1079 | if (xfrm4_tunnel_register(&sit_handler, AF_INET6) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | printk(KERN_INFO "sit init: Can't add protocol\n"); |
| 1081 | return -EAGAIN; |
| 1082 | } |
| 1083 | |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1084 | err = register_pernet_gen_device(&sit_net_id, &sit_net_ops); |
| 1085 | if (err < 0) |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1086 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
Joerg Roedel | 989e5b9 | 2006-10-10 14:47:44 -0700 | [diff] [blame] | 1090 | |
| 1091 | module_init(sit_init); |
| 1092 | module_exit(sit_cleanup); |
Jan Dittmer | 39c8508 | 2006-10-13 15:05:53 -0700 | [diff] [blame] | 1093 | MODULE_LICENSE("GPL"); |
Patrick McHardy | daccff0 | 2006-11-05 15:47:04 -0800 | [diff] [blame] | 1094 | MODULE_ALIAS("sit0"); |