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Commit | Line | Data |
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1181412c S |
1 | /* |
2 | * Linux NET3: IP/IP protocol decoder modified to support | |
3 | * virtual tunnel interface | |
4 | * | |
5 | * Authors: | |
6 | * Saurabh Mohan (saurabh.mohan@vyatta.com) 05/07/2012 | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | /* | |
16 | This version of net/ipv4/ip_vti.c is cloned of net/ipv4/ipip.c | |
17 | ||
18 | For comments look at net/ipv4/ip_gre.c --ANK | |
19 | */ | |
20 | ||
21 | ||
22 | #include <linux/capability.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/uaccess.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/in.h> | |
30 | #include <linux/tcp.h> | |
31 | #include <linux/udp.h> | |
32 | #include <linux/if_arp.h> | |
1181412c S |
33 | #include <linux/init.h> |
34 | #include <linux/netfilter_ipv4.h> | |
35 | #include <linux/if_ether.h> | |
78a010cc | 36 | #include <linux/icmpv6.h> |
1181412c S |
37 | |
38 | #include <net/sock.h> | |
39 | #include <net/ip.h> | |
40 | #include <net/icmp.h> | |
c5441932 | 41 | #include <net/ip_tunnels.h> |
1181412c S |
42 | #include <net/inet_ecn.h> |
43 | #include <net/xfrm.h> | |
44 | #include <net/net_namespace.h> | |
45 | #include <net/netns/generic.h> | |
46 | ||
1181412c S |
47 | static struct rtnl_link_ops vti_link_ops __read_mostly; |
48 | ||
49 | static int vti_net_id __read_mostly; | |
1181412c | 50 | static int vti_tunnel_init(struct net_device *dev); |
1181412c | 51 | |
df3893c1 SK |
52 | static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
53 | int encap_type) | |
1181412c S |
54 | { |
55 | struct ip_tunnel *tunnel; | |
56 | const struct iphdr *iph = ip_hdr(skb); | |
b9959fd3 AW |
57 | struct net *net = dev_net(skb->dev); |
58 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); | |
1181412c | 59 | |
b9959fd3 AW |
60 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
61 | iph->saddr, iph->daddr, 0); | |
00db4124 | 62 | if (tunnel) { |
df3893c1 SK |
63 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
64 | goto drop; | |
65 | ||
66 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel; | |
df3893c1 SK |
67 | |
68 | return xfrm_input(skb, nexthdr, spi, encap_type); | |
69 | } | |
70 | ||
71 | return -EINVAL; | |
72 | drop: | |
73 | kfree_skb(skb); | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int vti_rcv(struct sk_buff *skb) | |
78 | { | |
79 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; | |
80 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
81 | ||
82 | return vti_input(skb, ip_hdr(skb)->protocol, 0, 0); | |
83 | } | |
84 | ||
85 | static int vti_rcv_cb(struct sk_buff *skb, int err) | |
86 | { | |
87 | unsigned short family; | |
88 | struct net_device *dev; | |
89 | struct pcpu_sw_netstats *tstats; | |
90 | struct xfrm_state *x; | |
91 | struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4; | |
d55c670c AD |
92 | u32 orig_mark = skb->mark; |
93 | int ret; | |
df3893c1 SK |
94 | |
95 | if (!tunnel) | |
1181412c | 96 | return 1; |
df3893c1 SK |
97 | |
98 | dev = tunnel->dev; | |
99 | ||
100 | if (err) { | |
101 | dev->stats.rx_errors++; | |
102 | dev->stats.rx_dropped++; | |
103 | ||
104 | return 0; | |
1181412c | 105 | } |
1181412c | 106 | |
df3893c1 SK |
107 | x = xfrm_input_state(skb); |
108 | family = x->inner_mode->afinfo->family; | |
109 | ||
d55c670c AD |
110 | skb->mark = be32_to_cpu(tunnel->parms.i_key); |
111 | ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family); | |
112 | skb->mark = orig_mark; | |
113 | ||
114 | if (!ret) | |
df3893c1 SK |
115 | return -EPERM; |
116 | ||
117 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev))); | |
118 | skb->dev = dev; | |
119 | ||
120 | tstats = this_cpu_ptr(dev->tstats); | |
121 | ||
122 | u64_stats_update_begin(&tstats->syncp); | |
123 | tstats->rx_packets++; | |
124 | tstats->rx_bytes += skb->len; | |
125 | u64_stats_update_end(&tstats->syncp); | |
126 | ||
127 | return 0; | |
1181412c S |
128 | } |
129 | ||
6e2de802 SK |
130 | static bool vti_state_check(const struct xfrm_state *x, __be32 dst, __be32 src) |
131 | { | |
132 | xfrm_address_t *daddr = (xfrm_address_t *)&dst; | |
133 | xfrm_address_t *saddr = (xfrm_address_t *)&src; | |
134 | ||
135 | /* if there is no transform then this tunnel is not functional. | |
136 | * Or if the xfrm is not mode tunnel. | |
137 | */ | |
138 | if (!x || x->props.mode != XFRM_MODE_TUNNEL || | |
139 | x->props.family != AF_INET) | |
140 | return false; | |
141 | ||
142 | if (!dst) | |
143 | return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET); | |
144 | ||
145 | if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET)) | |
146 | return false; | |
147 | ||
148 | return true; | |
149 | } | |
150 | ||
78a010cc SK |
151 | static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev, |
152 | struct flowi *fl) | |
1181412c S |
153 | { |
154 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
6e2de802 | 155 | struct ip_tunnel_parm *parms = &tunnel->parms; |
a34cd4f3 | 156 | struct dst_entry *dst = skb_dst(skb); |
1181412c | 157 | struct net_device *tdev; /* Device to other host */ |
b9959fd3 | 158 | int err; |
1181412c | 159 | |
a34cd4f3 | 160 | if (!dst) { |
df3893c1 SK |
161 | dev->stats.tx_carrier_errors++; |
162 | goto tx_error_icmp; | |
163 | } | |
1181412c | 164 | |
a34cd4f3 | 165 | dst_hold(dst); |
78a010cc | 166 | dst = xfrm_lookup(tunnel->net, dst, fl, NULL, 0); |
a34cd4f3 | 167 | if (IS_ERR(dst)) { |
1181412c S |
168 | dev->stats.tx_carrier_errors++; |
169 | goto tx_error_icmp; | |
170 | } | |
df3893c1 | 171 | |
6e2de802 | 172 | if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) { |
1181412c | 173 | dev->stats.tx_carrier_errors++; |
a34cd4f3 | 174 | dst_release(dst); |
1181412c S |
175 | goto tx_error_icmp; |
176 | } | |
6e2de802 | 177 | |
a34cd4f3 | 178 | tdev = dst->dev; |
1181412c S |
179 | |
180 | if (tdev == dev) { | |
a34cd4f3 | 181 | dst_release(dst); |
1181412c S |
182 | dev->stats.collisions++; |
183 | goto tx_error; | |
184 | } | |
185 | ||
186 | if (tunnel->err_count > 0) { | |
187 | if (time_before(jiffies, | |
188 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { | |
189 | tunnel->err_count--; | |
190 | dst_link_failure(skb); | |
191 | } else | |
192 | tunnel->err_count = 0; | |
193 | } | |
194 | ||
df3893c1 | 195 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev))); |
a34cd4f3 | 196 | skb_dst_set(skb, dst); |
1181412c S |
197 | skb->dev = skb_dst(skb)->dev; |
198 | ||
13206b6b | 199 | err = dst_output(tunnel->net, skb->sk, skb); |
b9959fd3 AW |
200 | if (net_xmit_eval(err) == 0) |
201 | err = skb->len; | |
039f5062 | 202 | iptunnel_xmit_stats(dev, err); |
1181412c S |
203 | return NETDEV_TX_OK; |
204 | ||
205 | tx_error_icmp: | |
206 | dst_link_failure(skb); | |
207 | tx_error: | |
208 | dev->stats.tx_errors++; | |
3acfa1e7 | 209 | kfree_skb(skb); |
1181412c S |
210 | return NETDEV_TX_OK; |
211 | } | |
212 | ||
78a010cc SK |
213 | /* This function assumes it is being called from dev_queue_xmit() |
214 | * and that skb is filled properly by that function. | |
215 | */ | |
216 | static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) | |
217 | { | |
218 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
219 | struct flowi fl; | |
220 | ||
221 | memset(&fl, 0, sizeof(fl)); | |
222 | ||
78a010cc SK |
223 | switch (skb->protocol) { |
224 | case htons(ETH_P_IP): | |
225 | xfrm_decode_session(skb, &fl, AF_INET); | |
226 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | |
227 | break; | |
228 | case htons(ETH_P_IPV6): | |
229 | xfrm_decode_session(skb, &fl, AF_INET6); | |
230 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); | |
231 | break; | |
232 | default: | |
233 | dev->stats.tx_errors++; | |
234 | dev_kfree_skb(skb); | |
235 | return NETDEV_TX_OK; | |
236 | } | |
237 | ||
cd5279c1 AD |
238 | /* override mark with tunnel output key */ |
239 | fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key); | |
240 | ||
78a010cc SK |
241 | return vti_xmit(skb, dev, &fl); |
242 | } | |
243 | ||
df3893c1 SK |
244 | static int vti4_err(struct sk_buff *skb, u32 info) |
245 | { | |
246 | __be32 spi; | |
6d004d6c | 247 | __u32 mark; |
df3893c1 SK |
248 | struct xfrm_state *x; |
249 | struct ip_tunnel *tunnel; | |
250 | struct ip_esp_hdr *esph; | |
251 | struct ip_auth_hdr *ah ; | |
252 | struct ip_comp_hdr *ipch; | |
253 | struct net *net = dev_net(skb->dev); | |
254 | const struct iphdr *iph = (const struct iphdr *)skb->data; | |
255 | int protocol = iph->protocol; | |
256 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); | |
257 | ||
258 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, | |
259 | iph->daddr, iph->saddr, 0); | |
260 | if (!tunnel) | |
261 | return -1; | |
262 | ||
6d004d6c SK |
263 | mark = be32_to_cpu(tunnel->parms.o_key); |
264 | ||
df3893c1 SK |
265 | switch (protocol) { |
266 | case IPPROTO_ESP: | |
267 | esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); | |
268 | spi = esph->spi; | |
269 | break; | |
270 | case IPPROTO_AH: | |
271 | ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2)); | |
272 | spi = ah->spi; | |
273 | break; | |
274 | case IPPROTO_COMP: | |
275 | ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2)); | |
276 | spi = htonl(ntohs(ipch->cpi)); | |
277 | break; | |
278 | default: | |
279 | return 0; | |
280 | } | |
281 | ||
282 | switch (icmp_hdr(skb)->type) { | |
283 | case ICMP_DEST_UNREACH: | |
284 | if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) | |
285 | return 0; | |
286 | case ICMP_REDIRECT: | |
287 | break; | |
288 | default: | |
289 | return 0; | |
290 | } | |
291 | ||
6d004d6c | 292 | x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr, |
df3893c1 SK |
293 | spi, protocol, AF_INET); |
294 | if (!x) | |
295 | return 0; | |
296 | ||
297 | if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) | |
298 | ipv4_update_pmtu(skb, net, info, 0, 0, protocol, 0); | |
299 | else | |
300 | ipv4_redirect(skb, net, 0, 0, protocol, 0); | |
301 | xfrm_state_put(x); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
1181412c S |
306 | static int |
307 | vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
308 | { | |
309 | int err = 0; | |
310 | struct ip_tunnel_parm p; | |
1181412c | 311 | |
b9959fd3 AW |
312 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
313 | return -EFAULT; | |
1181412c | 314 | |
b9959fd3 | 315 | if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
1181412c S |
316 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || |
317 | p.iph.ihl != 5) | |
b9959fd3 AW |
318 | return -EINVAL; |
319 | } | |
1181412c | 320 | |
7c8e6b9c DP |
321 | if (!(p.i_flags & GRE_KEY)) |
322 | p.i_key = 0; | |
323 | if (!(p.o_flags & GRE_KEY)) | |
324 | p.o_key = 0; | |
325 | ||
326 | p.i_flags = VTI_ISVTI; | |
327 | ||
b9959fd3 AW |
328 | err = ip_tunnel_ioctl(dev, &p, cmd); |
329 | if (err) | |
330 | return err; | |
1181412c | 331 | |
b9959fd3 | 332 | if (cmd != SIOCDELTUNNEL) { |
df3893c1 | 333 | p.i_flags |= GRE_KEY; |
b9959fd3 | 334 | p.o_flags |= GRE_KEY; |
1181412c S |
335 | } |
336 | ||
b9959fd3 AW |
337 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
338 | return -EFAULT; | |
1181412c S |
339 | return 0; |
340 | } | |
341 | ||
342 | static const struct net_device_ops vti_netdev_ops = { | |
343 | .ndo_init = vti_tunnel_init, | |
b9959fd3 | 344 | .ndo_uninit = ip_tunnel_uninit, |
1181412c S |
345 | .ndo_start_xmit = vti_tunnel_xmit, |
346 | .ndo_do_ioctl = vti_tunnel_ioctl, | |
b9959fd3 | 347 | .ndo_change_mtu = ip_tunnel_change_mtu, |
f61dd388 | 348 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
1e99584b | 349 | .ndo_get_iflink = ip_tunnel_get_iflink, |
1181412c S |
350 | }; |
351 | ||
b9959fd3 | 352 | static void vti_tunnel_setup(struct net_device *dev) |
1181412c | 353 | { |
b9959fd3 | 354 | dev->netdev_ops = &vti_netdev_ops; |
8d89dcdf | 355 | dev->type = ARPHRD_TUNNEL; |
b9959fd3 | 356 | ip_tunnel_setup(dev, vti_net_id); |
1181412c S |
357 | } |
358 | ||
b9959fd3 | 359 | static int vti_tunnel_init(struct net_device *dev) |
1181412c | 360 | { |
b9959fd3 AW |
361 | struct ip_tunnel *tunnel = netdev_priv(dev); |
362 | struct iphdr *iph = &tunnel->parms.iph; | |
363 | ||
364 | memcpy(dev->dev_addr, &iph->saddr, 4); | |
365 | memcpy(dev->broadcast, &iph->daddr, 4); | |
1181412c | 366 | |
1181412c S |
367 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
368 | dev->mtu = ETH_DATA_LEN; | |
369 | dev->flags = IFF_NOARP; | |
1181412c | 370 | dev->addr_len = 4; |
1181412c | 371 | dev->features |= NETIF_F_LLTX; |
02875878 | 372 | netif_keep_dst(dev); |
1181412c | 373 | |
b9959fd3 | 374 | return ip_tunnel_init(dev); |
1181412c S |
375 | } |
376 | ||
b9959fd3 | 377 | static void __net_init vti_fb_tunnel_init(struct net_device *dev) |
1181412c S |
378 | { |
379 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
380 | struct iphdr *iph = &tunnel->parms.iph; | |
1181412c | 381 | |
1181412c S |
382 | iph->version = 4; |
383 | iph->protocol = IPPROTO_IPIP; | |
384 | iph->ihl = 5; | |
1181412c S |
385 | } |
386 | ||
df3893c1 | 387 | static struct xfrm4_protocol vti_esp4_protocol __read_mostly = { |
1181412c | 388 | .handler = vti_rcv, |
df3893c1 SK |
389 | .input_handler = vti_input, |
390 | .cb_handler = vti_rcv_cb, | |
391 | .err_handler = vti4_err, | |
392 | .priority = 100, | |
393 | }; | |
394 | ||
395 | static struct xfrm4_protocol vti_ah4_protocol __read_mostly = { | |
396 | .handler = vti_rcv, | |
397 | .input_handler = vti_input, | |
398 | .cb_handler = vti_rcv_cb, | |
399 | .err_handler = vti4_err, | |
400 | .priority = 100, | |
401 | }; | |
402 | ||
403 | static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = { | |
404 | .handler = vti_rcv, | |
405 | .input_handler = vti_input, | |
406 | .cb_handler = vti_rcv_cb, | |
407 | .err_handler = vti4_err, | |
408 | .priority = 100, | |
1181412c S |
409 | }; |
410 | ||
1181412c S |
411 | static int __net_init vti_init_net(struct net *net) |
412 | { | |
413 | int err; | |
b9959fd3 | 414 | struct ip_tunnel_net *itn; |
1181412c | 415 | |
b9959fd3 | 416 | err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0"); |
1181412c | 417 | if (err) |
b9959fd3 AW |
418 | return err; |
419 | itn = net_generic(net, vti_net_id); | |
420 | vti_fb_tunnel_init(itn->fb_tunnel_dev); | |
1181412c | 421 | return 0; |
1181412c S |
422 | } |
423 | ||
424 | static void __net_exit vti_exit_net(struct net *net) | |
425 | { | |
b9959fd3 | 426 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); |
6c742e71 | 427 | ip_tunnel_delete_net(itn, &vti_link_ops); |
1181412c S |
428 | } |
429 | ||
430 | static struct pernet_operations vti_net_ops = { | |
431 | .init = vti_init_net, | |
432 | .exit = vti_exit_net, | |
433 | .id = &vti_net_id, | |
b9959fd3 | 434 | .size = sizeof(struct ip_tunnel_net), |
1181412c S |
435 | }; |
436 | ||
437 | static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[]) | |
438 | { | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static void vti_netlink_parms(struct nlattr *data[], | |
443 | struct ip_tunnel_parm *parms) | |
444 | { | |
445 | memset(parms, 0, sizeof(*parms)); | |
446 | ||
447 | parms->iph.protocol = IPPROTO_IPIP; | |
448 | ||
449 | if (!data) | |
450 | return; | |
451 | ||
df3893c1 SK |
452 | parms->i_flags = VTI_ISVTI; |
453 | ||
1181412c S |
454 | if (data[IFLA_VTI_LINK]) |
455 | parms->link = nla_get_u32(data[IFLA_VTI_LINK]); | |
456 | ||
457 | if (data[IFLA_VTI_IKEY]) | |
458 | parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]); | |
459 | ||
460 | if (data[IFLA_VTI_OKEY]) | |
461 | parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]); | |
462 | ||
463 | if (data[IFLA_VTI_LOCAL]) | |
67b61f6c | 464 | parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]); |
1181412c S |
465 | |
466 | if (data[IFLA_VTI_REMOTE]) | |
67b61f6c | 467 | parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]); |
1181412c S |
468 | |
469 | } | |
470 | ||
471 | static int vti_newlink(struct net *src_net, struct net_device *dev, | |
472 | struct nlattr *tb[], struct nlattr *data[]) | |
473 | { | |
b9959fd3 | 474 | struct ip_tunnel_parm parms; |
1181412c | 475 | |
b9959fd3 AW |
476 | vti_netlink_parms(data, &parms); |
477 | return ip_tunnel_newlink(dev, tb, &parms); | |
1181412c S |
478 | } |
479 | ||
480 | static int vti_changelink(struct net_device *dev, struct nlattr *tb[], | |
481 | struct nlattr *data[]) | |
482 | { | |
1181412c | 483 | struct ip_tunnel_parm p; |
1181412c | 484 | |
1181412c | 485 | vti_netlink_parms(data, &p); |
b9959fd3 | 486 | return ip_tunnel_changelink(dev, tb, &p); |
1181412c S |
487 | } |
488 | ||
489 | static size_t vti_get_size(const struct net_device *dev) | |
490 | { | |
491 | return | |
492 | /* IFLA_VTI_LINK */ | |
493 | nla_total_size(4) + | |
494 | /* IFLA_VTI_IKEY */ | |
495 | nla_total_size(4) + | |
496 | /* IFLA_VTI_OKEY */ | |
497 | nla_total_size(4) + | |
498 | /* IFLA_VTI_LOCAL */ | |
499 | nla_total_size(4) + | |
500 | /* IFLA_VTI_REMOTE */ | |
501 | nla_total_size(4) + | |
502 | 0; | |
503 | } | |
504 | ||
505 | static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
506 | { | |
507 | struct ip_tunnel *t = netdev_priv(dev); | |
508 | struct ip_tunnel_parm *p = &t->parms; | |
509 | ||
510 | nla_put_u32(skb, IFLA_VTI_LINK, p->link); | |
511 | nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key); | |
512 | nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key); | |
930345ea JB |
513 | nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr); |
514 | nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr); | |
1181412c S |
515 | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = { | |
520 | [IFLA_VTI_LINK] = { .type = NLA_U32 }, | |
521 | [IFLA_VTI_IKEY] = { .type = NLA_U32 }, | |
522 | [IFLA_VTI_OKEY] = { .type = NLA_U32 }, | |
523 | [IFLA_VTI_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
524 | [IFLA_VTI_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
525 | }; | |
526 | ||
527 | static struct rtnl_link_ops vti_link_ops __read_mostly = { | |
528 | .kind = "vti", | |
529 | .maxtype = IFLA_VTI_MAX, | |
530 | .policy = vti_policy, | |
531 | .priv_size = sizeof(struct ip_tunnel), | |
532 | .setup = vti_tunnel_setup, | |
533 | .validate = vti_tunnel_validate, | |
534 | .newlink = vti_newlink, | |
535 | .changelink = vti_changelink, | |
20ea60ca | 536 | .dellink = ip_tunnel_dellink, |
1181412c S |
537 | .get_size = vti_get_size, |
538 | .fill_info = vti_fill_info, | |
1728d4fa | 539 | .get_link_net = ip_tunnel_get_link_net, |
1181412c S |
540 | }; |
541 | ||
542 | static int __init vti_init(void) | |
543 | { | |
1990e4f8 | 544 | const char *msg; |
1181412c S |
545 | int err; |
546 | ||
1990e4f8 | 547 | pr_info("IPv4 over IPsec tunneling driver\n"); |
1181412c | 548 | |
1990e4f8 | 549 | msg = "tunnel device"; |
1181412c S |
550 | err = register_pernet_device(&vti_net_ops); |
551 | if (err < 0) | |
1990e4f8 | 552 | goto pernet_dev_failed; |
df3893c1 | 553 | |
1990e4f8 MK |
554 | msg = "tunnel protocols"; |
555 | err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP); | |
556 | if (err < 0) | |
557 | goto xfrm_proto_esp_failed; | |
df3893c1 | 558 | err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 MK |
559 | if (err < 0) |
560 | goto xfrm_proto_ah_failed; | |
df3893c1 | 561 | err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f8 MK |
562 | if (err < 0) |
563 | goto xfrm_proto_comp_failed; | |
1181412c | 564 | |
1990e4f8 | 565 | msg = "netlink interface"; |
1181412c S |
566 | err = rtnl_link_register(&vti_link_ops); |
567 | if (err < 0) | |
568 | goto rtnl_link_failed; | |
569 | ||
570 | return err; | |
571 | ||
572 | rtnl_link_failed: | |
df3893c1 | 573 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f8 | 574 | xfrm_proto_comp_failed: |
df3893c1 | 575 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 | 576 | xfrm_proto_ah_failed: |
df3893c1 | 577 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
1990e4f8 | 578 | xfrm_proto_esp_failed: |
1181412c | 579 | unregister_pernet_device(&vti_net_ops); |
1990e4f8 MK |
580 | pernet_dev_failed: |
581 | pr_err("vti init: failed to register %s\n", msg); | |
1181412c S |
582 | return err; |
583 | } | |
584 | ||
585 | static void __exit vti_fini(void) | |
586 | { | |
587 | rtnl_link_unregister(&vti_link_ops); | |
1990e4f8 MK |
588 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
589 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); | |
590 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); | |
1181412c S |
591 | unregister_pernet_device(&vti_net_ops); |
592 | } | |
593 | ||
594 | module_init(vti_init); | |
595 | module_exit(vti_fini); | |
596 | MODULE_LICENSE("GPL"); | |
597 | MODULE_ALIAS_RTNL_LINK("vti"); | |
598 | MODULE_ALIAS_NETDEV("ip_vti0"); |