Commit | Line | Data |
---|---|---|
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; |
d6af1a31 | 159 | int mtu; |
1181412c | 160 | |
a34cd4f3 | 161 | if (!dst) { |
df3893c1 SK |
162 | dev->stats.tx_carrier_errors++; |
163 | goto tx_error_icmp; | |
164 | } | |
1181412c | 165 | |
a34cd4f3 | 166 | dst_hold(dst); |
78a010cc | 167 | dst = xfrm_lookup(tunnel->net, dst, fl, NULL, 0); |
a34cd4f3 | 168 | if (IS_ERR(dst)) { |
1181412c S |
169 | dev->stats.tx_carrier_errors++; |
170 | goto tx_error_icmp; | |
171 | } | |
df3893c1 | 172 | |
6e2de802 | 173 | if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) { |
1181412c | 174 | dev->stats.tx_carrier_errors++; |
a34cd4f3 | 175 | dst_release(dst); |
1181412c S |
176 | goto tx_error_icmp; |
177 | } | |
6e2de802 | 178 | |
a34cd4f3 | 179 | tdev = dst->dev; |
1181412c S |
180 | |
181 | if (tdev == dev) { | |
a34cd4f3 | 182 | dst_release(dst); |
1181412c S |
183 | dev->stats.collisions++; |
184 | goto tx_error; | |
185 | } | |
186 | ||
187 | if (tunnel->err_count > 0) { | |
188 | if (time_before(jiffies, | |
189 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { | |
190 | tunnel->err_count--; | |
191 | dst_link_failure(skb); | |
192 | } else | |
193 | tunnel->err_count = 0; | |
194 | } | |
195 | ||
d6af1a31 SK |
196 | mtu = dst_mtu(dst); |
197 | if (skb->len > mtu) { | |
198 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); | |
199 | if (skb->protocol == htons(ETH_P_IP)) { | |
200 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, | |
201 | htonl(mtu)); | |
202 | } else { | |
203 | if (mtu < IPV6_MIN_MTU) | |
204 | mtu = IPV6_MIN_MTU; | |
205 | ||
206 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); | |
207 | } | |
208 | ||
209 | dst_release(dst); | |
210 | goto tx_error; | |
211 | } | |
212 | ||
df3893c1 | 213 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev))); |
a34cd4f3 | 214 | skb_dst_set(skb, dst); |
1181412c S |
215 | skb->dev = skb_dst(skb)->dev; |
216 | ||
13206b6b | 217 | err = dst_output(tunnel->net, skb->sk, skb); |
b9959fd3 AW |
218 | if (net_xmit_eval(err) == 0) |
219 | err = skb->len; | |
039f5062 | 220 | iptunnel_xmit_stats(dev, err); |
1181412c S |
221 | return NETDEV_TX_OK; |
222 | ||
223 | tx_error_icmp: | |
224 | dst_link_failure(skb); | |
225 | tx_error: | |
226 | dev->stats.tx_errors++; | |
3acfa1e7 | 227 | kfree_skb(skb); |
1181412c S |
228 | return NETDEV_TX_OK; |
229 | } | |
230 | ||
78a010cc SK |
231 | /* This function assumes it is being called from dev_queue_xmit() |
232 | * and that skb is filled properly by that function. | |
233 | */ | |
234 | static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) | |
235 | { | |
236 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
237 | struct flowi fl; | |
238 | ||
239 | memset(&fl, 0, sizeof(fl)); | |
240 | ||
78a010cc SK |
241 | switch (skb->protocol) { |
242 | case htons(ETH_P_IP): | |
243 | xfrm_decode_session(skb, &fl, AF_INET); | |
244 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | |
245 | break; | |
246 | case htons(ETH_P_IPV6): | |
247 | xfrm_decode_session(skb, &fl, AF_INET6); | |
248 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); | |
249 | break; | |
250 | default: | |
251 | dev->stats.tx_errors++; | |
252 | dev_kfree_skb(skb); | |
253 | return NETDEV_TX_OK; | |
254 | } | |
255 | ||
cd5279c1 AD |
256 | /* override mark with tunnel output key */ |
257 | fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key); | |
258 | ||
78a010cc SK |
259 | return vti_xmit(skb, dev, &fl); |
260 | } | |
261 | ||
df3893c1 SK |
262 | static int vti4_err(struct sk_buff *skb, u32 info) |
263 | { | |
264 | __be32 spi; | |
6d004d6c | 265 | __u32 mark; |
df3893c1 SK |
266 | struct xfrm_state *x; |
267 | struct ip_tunnel *tunnel; | |
268 | struct ip_esp_hdr *esph; | |
269 | struct ip_auth_hdr *ah ; | |
270 | struct ip_comp_hdr *ipch; | |
271 | struct net *net = dev_net(skb->dev); | |
272 | const struct iphdr *iph = (const struct iphdr *)skb->data; | |
273 | int protocol = iph->protocol; | |
274 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); | |
275 | ||
276 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, | |
277 | iph->daddr, iph->saddr, 0); | |
278 | if (!tunnel) | |
279 | return -1; | |
280 | ||
6d004d6c SK |
281 | mark = be32_to_cpu(tunnel->parms.o_key); |
282 | ||
df3893c1 SK |
283 | switch (protocol) { |
284 | case IPPROTO_ESP: | |
285 | esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); | |
286 | spi = esph->spi; | |
287 | break; | |
288 | case IPPROTO_AH: | |
289 | ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2)); | |
290 | spi = ah->spi; | |
291 | break; | |
292 | case IPPROTO_COMP: | |
293 | ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2)); | |
294 | spi = htonl(ntohs(ipch->cpi)); | |
295 | break; | |
296 | default: | |
297 | return 0; | |
298 | } | |
299 | ||
300 | switch (icmp_hdr(skb)->type) { | |
301 | case ICMP_DEST_UNREACH: | |
302 | if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) | |
303 | return 0; | |
304 | case ICMP_REDIRECT: | |
305 | break; | |
306 | default: | |
307 | return 0; | |
308 | } | |
309 | ||
6d004d6c | 310 | x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr, |
df3893c1 SK |
311 | spi, protocol, AF_INET); |
312 | if (!x) | |
313 | return 0; | |
314 | ||
315 | if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) | |
316 | ipv4_update_pmtu(skb, net, info, 0, 0, protocol, 0); | |
317 | else | |
318 | ipv4_redirect(skb, net, 0, 0, protocol, 0); | |
319 | xfrm_state_put(x); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
1181412c S |
324 | static int |
325 | vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
326 | { | |
327 | int err = 0; | |
328 | struct ip_tunnel_parm p; | |
1181412c | 329 | |
b9959fd3 AW |
330 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
331 | return -EFAULT; | |
1181412c | 332 | |
b9959fd3 | 333 | if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
1181412c S |
334 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || |
335 | p.iph.ihl != 5) | |
b9959fd3 AW |
336 | return -EINVAL; |
337 | } | |
1181412c | 338 | |
7c8e6b9c DP |
339 | if (!(p.i_flags & GRE_KEY)) |
340 | p.i_key = 0; | |
341 | if (!(p.o_flags & GRE_KEY)) | |
342 | p.o_key = 0; | |
343 | ||
344 | p.i_flags = VTI_ISVTI; | |
345 | ||
b9959fd3 AW |
346 | err = ip_tunnel_ioctl(dev, &p, cmd); |
347 | if (err) | |
348 | return err; | |
1181412c | 349 | |
b9959fd3 | 350 | if (cmd != SIOCDELTUNNEL) { |
df3893c1 | 351 | p.i_flags |= GRE_KEY; |
b9959fd3 | 352 | p.o_flags |= GRE_KEY; |
1181412c S |
353 | } |
354 | ||
b9959fd3 AW |
355 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
356 | return -EFAULT; | |
1181412c S |
357 | return 0; |
358 | } | |
359 | ||
360 | static const struct net_device_ops vti_netdev_ops = { | |
361 | .ndo_init = vti_tunnel_init, | |
b9959fd3 | 362 | .ndo_uninit = ip_tunnel_uninit, |
1181412c S |
363 | .ndo_start_xmit = vti_tunnel_xmit, |
364 | .ndo_do_ioctl = vti_tunnel_ioctl, | |
b9959fd3 | 365 | .ndo_change_mtu = ip_tunnel_change_mtu, |
f61dd388 | 366 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
1e99584b | 367 | .ndo_get_iflink = ip_tunnel_get_iflink, |
1181412c S |
368 | }; |
369 | ||
b9959fd3 | 370 | static void vti_tunnel_setup(struct net_device *dev) |
1181412c | 371 | { |
b9959fd3 | 372 | dev->netdev_ops = &vti_netdev_ops; |
8d89dcdf | 373 | dev->type = ARPHRD_TUNNEL; |
b9959fd3 | 374 | ip_tunnel_setup(dev, vti_net_id); |
1181412c S |
375 | } |
376 | ||
b9959fd3 | 377 | static int vti_tunnel_init(struct net_device *dev) |
1181412c | 378 | { |
b9959fd3 AW |
379 | struct ip_tunnel *tunnel = netdev_priv(dev); |
380 | struct iphdr *iph = &tunnel->parms.iph; | |
381 | ||
382 | memcpy(dev->dev_addr, &iph->saddr, 4); | |
383 | memcpy(dev->broadcast, &iph->daddr, 4); | |
1181412c | 384 | |
1181412c S |
385 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
386 | dev->mtu = ETH_DATA_LEN; | |
387 | dev->flags = IFF_NOARP; | |
1181412c | 388 | dev->addr_len = 4; |
1181412c | 389 | dev->features |= NETIF_F_LLTX; |
02875878 | 390 | netif_keep_dst(dev); |
1181412c | 391 | |
b9959fd3 | 392 | return ip_tunnel_init(dev); |
1181412c S |
393 | } |
394 | ||
b9959fd3 | 395 | static void __net_init vti_fb_tunnel_init(struct net_device *dev) |
1181412c S |
396 | { |
397 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
398 | struct iphdr *iph = &tunnel->parms.iph; | |
1181412c | 399 | |
1181412c S |
400 | iph->version = 4; |
401 | iph->protocol = IPPROTO_IPIP; | |
402 | iph->ihl = 5; | |
1181412c S |
403 | } |
404 | ||
df3893c1 | 405 | static struct xfrm4_protocol vti_esp4_protocol __read_mostly = { |
1181412c | 406 | .handler = vti_rcv, |
df3893c1 SK |
407 | .input_handler = vti_input, |
408 | .cb_handler = vti_rcv_cb, | |
409 | .err_handler = vti4_err, | |
410 | .priority = 100, | |
411 | }; | |
412 | ||
413 | static struct xfrm4_protocol vti_ah4_protocol __read_mostly = { | |
414 | .handler = vti_rcv, | |
415 | .input_handler = vti_input, | |
416 | .cb_handler = vti_rcv_cb, | |
417 | .err_handler = vti4_err, | |
418 | .priority = 100, | |
419 | }; | |
420 | ||
421 | static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = { | |
422 | .handler = vti_rcv, | |
423 | .input_handler = vti_input, | |
424 | .cb_handler = vti_rcv_cb, | |
425 | .err_handler = vti4_err, | |
426 | .priority = 100, | |
1181412c S |
427 | }; |
428 | ||
1181412c S |
429 | static int __net_init vti_init_net(struct net *net) |
430 | { | |
431 | int err; | |
b9959fd3 | 432 | struct ip_tunnel_net *itn; |
1181412c | 433 | |
b9959fd3 | 434 | err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0"); |
1181412c | 435 | if (err) |
b9959fd3 AW |
436 | return err; |
437 | itn = net_generic(net, vti_net_id); | |
438 | vti_fb_tunnel_init(itn->fb_tunnel_dev); | |
1181412c | 439 | return 0; |
1181412c S |
440 | } |
441 | ||
442 | static void __net_exit vti_exit_net(struct net *net) | |
443 | { | |
b9959fd3 | 444 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); |
6c742e71 | 445 | ip_tunnel_delete_net(itn, &vti_link_ops); |
1181412c S |
446 | } |
447 | ||
448 | static struct pernet_operations vti_net_ops = { | |
449 | .init = vti_init_net, | |
450 | .exit = vti_exit_net, | |
451 | .id = &vti_net_id, | |
b9959fd3 | 452 | .size = sizeof(struct ip_tunnel_net), |
1181412c S |
453 | }; |
454 | ||
455 | static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[]) | |
456 | { | |
457 | return 0; | |
458 | } | |
459 | ||
460 | static void vti_netlink_parms(struct nlattr *data[], | |
461 | struct ip_tunnel_parm *parms) | |
462 | { | |
463 | memset(parms, 0, sizeof(*parms)); | |
464 | ||
465 | parms->iph.protocol = IPPROTO_IPIP; | |
466 | ||
467 | if (!data) | |
468 | return; | |
469 | ||
df3893c1 SK |
470 | parms->i_flags = VTI_ISVTI; |
471 | ||
1181412c S |
472 | if (data[IFLA_VTI_LINK]) |
473 | parms->link = nla_get_u32(data[IFLA_VTI_LINK]); | |
474 | ||
475 | if (data[IFLA_VTI_IKEY]) | |
476 | parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]); | |
477 | ||
478 | if (data[IFLA_VTI_OKEY]) | |
479 | parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]); | |
480 | ||
481 | if (data[IFLA_VTI_LOCAL]) | |
67b61f6c | 482 | parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]); |
1181412c S |
483 | |
484 | if (data[IFLA_VTI_REMOTE]) | |
67b61f6c | 485 | parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]); |
1181412c S |
486 | |
487 | } | |
488 | ||
489 | static int vti_newlink(struct net *src_net, struct net_device *dev, | |
490 | struct nlattr *tb[], struct nlattr *data[]) | |
491 | { | |
b9959fd3 | 492 | struct ip_tunnel_parm parms; |
1181412c | 493 | |
b9959fd3 AW |
494 | vti_netlink_parms(data, &parms); |
495 | return ip_tunnel_newlink(dev, tb, &parms); | |
1181412c S |
496 | } |
497 | ||
498 | static int vti_changelink(struct net_device *dev, struct nlattr *tb[], | |
499 | struct nlattr *data[]) | |
500 | { | |
1181412c | 501 | struct ip_tunnel_parm p; |
1181412c | 502 | |
1181412c | 503 | vti_netlink_parms(data, &p); |
b9959fd3 | 504 | return ip_tunnel_changelink(dev, tb, &p); |
1181412c S |
505 | } |
506 | ||
507 | static size_t vti_get_size(const struct net_device *dev) | |
508 | { | |
509 | return | |
510 | /* IFLA_VTI_LINK */ | |
511 | nla_total_size(4) + | |
512 | /* IFLA_VTI_IKEY */ | |
513 | nla_total_size(4) + | |
514 | /* IFLA_VTI_OKEY */ | |
515 | nla_total_size(4) + | |
516 | /* IFLA_VTI_LOCAL */ | |
517 | nla_total_size(4) + | |
518 | /* IFLA_VTI_REMOTE */ | |
519 | nla_total_size(4) + | |
520 | 0; | |
521 | } | |
522 | ||
523 | static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
524 | { | |
525 | struct ip_tunnel *t = netdev_priv(dev); | |
526 | struct ip_tunnel_parm *p = &t->parms; | |
527 | ||
528 | nla_put_u32(skb, IFLA_VTI_LINK, p->link); | |
529 | nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key); | |
530 | nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key); | |
930345ea JB |
531 | nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr); |
532 | nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr); | |
1181412c S |
533 | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = { | |
538 | [IFLA_VTI_LINK] = { .type = NLA_U32 }, | |
539 | [IFLA_VTI_IKEY] = { .type = NLA_U32 }, | |
540 | [IFLA_VTI_OKEY] = { .type = NLA_U32 }, | |
541 | [IFLA_VTI_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
542 | [IFLA_VTI_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
543 | }; | |
544 | ||
545 | static struct rtnl_link_ops vti_link_ops __read_mostly = { | |
546 | .kind = "vti", | |
547 | .maxtype = IFLA_VTI_MAX, | |
548 | .policy = vti_policy, | |
549 | .priv_size = sizeof(struct ip_tunnel), | |
550 | .setup = vti_tunnel_setup, | |
551 | .validate = vti_tunnel_validate, | |
552 | .newlink = vti_newlink, | |
553 | .changelink = vti_changelink, | |
20ea60ca | 554 | .dellink = ip_tunnel_dellink, |
1181412c S |
555 | .get_size = vti_get_size, |
556 | .fill_info = vti_fill_info, | |
1728d4fa | 557 | .get_link_net = ip_tunnel_get_link_net, |
1181412c S |
558 | }; |
559 | ||
560 | static int __init vti_init(void) | |
561 | { | |
1990e4f8 | 562 | const char *msg; |
1181412c S |
563 | int err; |
564 | ||
1990e4f8 | 565 | pr_info("IPv4 over IPsec tunneling driver\n"); |
1181412c | 566 | |
1990e4f8 | 567 | msg = "tunnel device"; |
1181412c S |
568 | err = register_pernet_device(&vti_net_ops); |
569 | if (err < 0) | |
1990e4f8 | 570 | goto pernet_dev_failed; |
df3893c1 | 571 | |
1990e4f8 MK |
572 | msg = "tunnel protocols"; |
573 | err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP); | |
574 | if (err < 0) | |
575 | goto xfrm_proto_esp_failed; | |
df3893c1 | 576 | err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 MK |
577 | if (err < 0) |
578 | goto xfrm_proto_ah_failed; | |
df3893c1 | 579 | err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f8 MK |
580 | if (err < 0) |
581 | goto xfrm_proto_comp_failed; | |
1181412c | 582 | |
1990e4f8 | 583 | msg = "netlink interface"; |
1181412c S |
584 | err = rtnl_link_register(&vti_link_ops); |
585 | if (err < 0) | |
586 | goto rtnl_link_failed; | |
587 | ||
588 | return err; | |
589 | ||
590 | rtnl_link_failed: | |
df3893c1 | 591 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f8 | 592 | xfrm_proto_comp_failed: |
df3893c1 | 593 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 | 594 | xfrm_proto_ah_failed: |
df3893c1 | 595 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
1990e4f8 | 596 | xfrm_proto_esp_failed: |
1181412c | 597 | unregister_pernet_device(&vti_net_ops); |
1990e4f8 MK |
598 | pernet_dev_failed: |
599 | pr_err("vti init: failed to register %s\n", msg); | |
1181412c S |
600 | return err; |
601 | } | |
602 | ||
603 | static void __exit vti_fini(void) | |
604 | { | |
605 | rtnl_link_unregister(&vti_link_ops); | |
1990e4f8 MK |
606 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
607 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); | |
608 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); | |
1181412c S |
609 | unregister_pernet_device(&vti_net_ops); |
610 | } | |
611 | ||
612 | module_init(vti_init); | |
613 | module_exit(vti_fini); | |
614 | MODULE_LICENSE("GPL"); | |
615 | MODULE_ALIAS_RTNL_LINK("vti"); | |
616 | MODULE_ALIAS_NETDEV("ip_vti0"); |