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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1181412c S |
2 | /* |
3 | * Linux NET3: IP/IP protocol decoder modified to support | |
4 | * virtual tunnel interface | |
5 | * | |
6 | * Authors: | |
7 | * Saurabh Mohan (saurabh.mohan@vyatta.com) 05/07/2012 | |
1181412c S |
8 | */ |
9 | ||
10 | /* | |
11 | This version of net/ipv4/ip_vti.c is cloned of net/ipv4/ipip.c | |
12 | ||
13 | For comments look at net/ipv4/ip_gre.c --ANK | |
14 | */ | |
15 | ||
16 | ||
17 | #include <linux/capability.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/types.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/uaccess.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/in.h> | |
25 | #include <linux/tcp.h> | |
26 | #include <linux/udp.h> | |
27 | #include <linux/if_arp.h> | |
1181412c S |
28 | #include <linux/init.h> |
29 | #include <linux/netfilter_ipv4.h> | |
30 | #include <linux/if_ether.h> | |
78a010cc | 31 | #include <linux/icmpv6.h> |
1181412c S |
32 | |
33 | #include <net/sock.h> | |
34 | #include <net/ip.h> | |
35 | #include <net/icmp.h> | |
c5441932 | 36 | #include <net/ip_tunnels.h> |
1181412c S |
37 | #include <net/inet_ecn.h> |
38 | #include <net/xfrm.h> | |
39 | #include <net/net_namespace.h> | |
40 | #include <net/netns/generic.h> | |
41 | ||
1181412c S |
42 | static struct rtnl_link_ops vti_link_ops __read_mostly; |
43 | ||
c7d03a00 | 44 | static unsigned int vti_net_id __read_mostly; |
1181412c | 45 | static int vti_tunnel_init(struct net_device *dev); |
1181412c | 46 | |
df3893c1 | 47 | static int vti_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
f981c57f | 48 | int encap_type, bool update_skb_dev) |
1181412c S |
49 | { |
50 | struct ip_tunnel *tunnel; | |
51 | const struct iphdr *iph = ip_hdr(skb); | |
b9959fd3 AW |
52 | struct net *net = dev_net(skb->dev); |
53 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); | |
1181412c | 54 | |
b9959fd3 AW |
55 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, |
56 | iph->saddr, iph->daddr, 0); | |
00db4124 | 57 | if (tunnel) { |
df3893c1 SK |
58 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
59 | goto drop; | |
60 | ||
61 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = tunnel; | |
df3893c1 | 62 | |
f981c57f JS |
63 | if (update_skb_dev) |
64 | skb->dev = tunnel->dev; | |
65 | ||
df3893c1 SK |
66 | return xfrm_input(skb, nexthdr, spi, encap_type); |
67 | } | |
68 | ||
69 | return -EINVAL; | |
70 | drop: | |
71 | kfree_skb(skb); | |
72 | return 0; | |
73 | } | |
74 | ||
f981c57f JS |
75 | static int vti_input_proto(struct sk_buff *skb, int nexthdr, __be32 spi, |
76 | int encap_type) | |
dd9ee344 | 77 | { |
f981c57f | 78 | return vti_input(skb, nexthdr, spi, encap_type, false); |
dd9ee344 SY |
79 | } |
80 | ||
f981c57f | 81 | static int vti_rcv(struct sk_buff *skb, __be32 spi, bool update_skb_dev) |
df3893c1 SK |
82 | { |
83 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; | |
84 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
85 | ||
f981c57f | 86 | return vti_input(skb, ip_hdr(skb)->protocol, spi, 0, update_skb_dev); |
df3893c1 SK |
87 | } |
88 | ||
f981c57f | 89 | static int vti_rcv_proto(struct sk_buff *skb) |
dd9ee344 | 90 | { |
f981c57f JS |
91 | return vti_rcv(skb, 0, false); |
92 | } | |
dd9ee344 | 93 | |
f981c57f JS |
94 | static int vti_rcv_tunnel(struct sk_buff *skb) |
95 | { | |
96 | return vti_rcv(skb, ip_hdr(skb)->saddr, true); | |
dd9ee344 SY |
97 | } |
98 | ||
df3893c1 SK |
99 | static int vti_rcv_cb(struct sk_buff *skb, int err) |
100 | { | |
101 | unsigned short family; | |
102 | struct net_device *dev; | |
103 | struct pcpu_sw_netstats *tstats; | |
104 | struct xfrm_state *x; | |
4c145dce | 105 | const struct xfrm_mode *inner_mode; |
df3893c1 | 106 | struct ip_tunnel *tunnel = XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4; |
d55c670c AD |
107 | u32 orig_mark = skb->mark; |
108 | int ret; | |
df3893c1 SK |
109 | |
110 | if (!tunnel) | |
1181412c | 111 | return 1; |
df3893c1 SK |
112 | |
113 | dev = tunnel->dev; | |
114 | ||
115 | if (err) { | |
116 | dev->stats.rx_errors++; | |
117 | dev->stats.rx_dropped++; | |
118 | ||
119 | return 0; | |
1181412c | 120 | } |
1181412c | 121 | |
df3893c1 | 122 | x = xfrm_input_state(skb); |
1fb81e09 | 123 | |
c9500d7b | 124 | inner_mode = &x->inner_mode; |
1fb81e09 | 125 | |
126 | if (x->sel.family == AF_UNSPEC) { | |
127 | inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); | |
128 | if (inner_mode == NULL) { | |
129 | XFRM_INC_STATS(dev_net(skb->dev), | |
130 | LINUX_MIB_XFRMINSTATEMODEERROR); | |
131 | return -EINVAL; | |
132 | } | |
133 | } | |
134 | ||
b45714b1 | 135 | family = inner_mode->family; |
df3893c1 | 136 | |
d55c670c AD |
137 | skb->mark = be32_to_cpu(tunnel->parms.i_key); |
138 | ret = xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family); | |
139 | skb->mark = orig_mark; | |
140 | ||
141 | if (!ret) | |
df3893c1 SK |
142 | return -EPERM; |
143 | ||
144 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(skb->dev))); | |
145 | skb->dev = dev; | |
146 | ||
147 | tstats = this_cpu_ptr(dev->tstats); | |
148 | ||
149 | u64_stats_update_begin(&tstats->syncp); | |
150 | tstats->rx_packets++; | |
151 | tstats->rx_bytes += skb->len; | |
152 | u64_stats_update_end(&tstats->syncp); | |
153 | ||
154 | return 0; | |
1181412c S |
155 | } |
156 | ||
6e2de802 SK |
157 | static bool vti_state_check(const struct xfrm_state *x, __be32 dst, __be32 src) |
158 | { | |
159 | xfrm_address_t *daddr = (xfrm_address_t *)&dst; | |
160 | xfrm_address_t *saddr = (xfrm_address_t *)&src; | |
161 | ||
162 | /* if there is no transform then this tunnel is not functional. | |
163 | * Or if the xfrm is not mode tunnel. | |
164 | */ | |
165 | if (!x || x->props.mode != XFRM_MODE_TUNNEL || | |
166 | x->props.family != AF_INET) | |
167 | return false; | |
168 | ||
169 | if (!dst) | |
170 | return xfrm_addr_equal(saddr, &x->props.saddr, AF_INET); | |
171 | ||
172 | if (!xfrm_state_addr_check(x, daddr, saddr, AF_INET)) | |
173 | return false; | |
174 | ||
175 | return true; | |
176 | } | |
177 | ||
78a010cc SK |
178 | static netdev_tx_t vti_xmit(struct sk_buff *skb, struct net_device *dev, |
179 | struct flowi *fl) | |
1181412c S |
180 | { |
181 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
6e2de802 | 182 | struct ip_tunnel_parm *parms = &tunnel->parms; |
a34cd4f3 | 183 | struct dst_entry *dst = skb_dst(skb); |
1181412c | 184 | struct net_device *tdev; /* Device to other host */ |
36f6ee22 | 185 | int pkt_len = skb->len; |
b9959fd3 | 186 | int err; |
d6af1a31 | 187 | int mtu; |
1181412c | 188 | |
a34cd4f3 | 189 | if (!dst) { |
df3893c1 SK |
190 | dev->stats.tx_carrier_errors++; |
191 | goto tx_error_icmp; | |
192 | } | |
1181412c | 193 | |
a34cd4f3 | 194 | dst_hold(dst); |
78a010cc | 195 | dst = xfrm_lookup(tunnel->net, dst, fl, NULL, 0); |
a34cd4f3 | 196 | if (IS_ERR(dst)) { |
1181412c S |
197 | dev->stats.tx_carrier_errors++; |
198 | goto tx_error_icmp; | |
199 | } | |
df3893c1 | 200 | |
6e2de802 | 201 | if (!vti_state_check(dst->xfrm, parms->iph.daddr, parms->iph.saddr)) { |
1181412c | 202 | dev->stats.tx_carrier_errors++; |
a34cd4f3 | 203 | dst_release(dst); |
1181412c S |
204 | goto tx_error_icmp; |
205 | } | |
6e2de802 | 206 | |
a34cd4f3 | 207 | tdev = dst->dev; |
1181412c S |
208 | |
209 | if (tdev == dev) { | |
a34cd4f3 | 210 | dst_release(dst); |
1181412c S |
211 | dev->stats.collisions++; |
212 | goto tx_error; | |
213 | } | |
214 | ||
d6af1a31 SK |
215 | mtu = dst_mtu(dst); |
216 | if (skb->len > mtu) { | |
f15ca723 | 217 | skb_dst_update_pmtu(skb, mtu); |
d6af1a31 SK |
218 | if (skb->protocol == htons(ETH_P_IP)) { |
219 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, | |
220 | htonl(mtu)); | |
221 | } else { | |
222 | if (mtu < IPV6_MIN_MTU) | |
223 | mtu = IPV6_MIN_MTU; | |
224 | ||
225 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); | |
226 | } | |
227 | ||
228 | dst_release(dst); | |
229 | goto tx_error; | |
230 | } | |
231 | ||
df3893c1 | 232 | skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(dev))); |
a34cd4f3 | 233 | skb_dst_set(skb, dst); |
1181412c S |
234 | skb->dev = skb_dst(skb)->dev; |
235 | ||
13206b6b | 236 | err = dst_output(tunnel->net, skb->sk, skb); |
b9959fd3 | 237 | if (net_xmit_eval(err) == 0) |
36f6ee22 | 238 | err = pkt_len; |
039f5062 | 239 | iptunnel_xmit_stats(dev, err); |
1181412c S |
240 | return NETDEV_TX_OK; |
241 | ||
242 | tx_error_icmp: | |
243 | dst_link_failure(skb); | |
244 | tx_error: | |
245 | dev->stats.tx_errors++; | |
3acfa1e7 | 246 | kfree_skb(skb); |
1181412c S |
247 | return NETDEV_TX_OK; |
248 | } | |
249 | ||
78a010cc SK |
250 | /* This function assumes it is being called from dev_queue_xmit() |
251 | * and that skb is filled properly by that function. | |
252 | */ | |
253 | static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) | |
254 | { | |
255 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
256 | struct flowi fl; | |
257 | ||
cb9f1b78 WB |
258 | if (!pskb_inet_may_pull(skb)) |
259 | goto tx_err; | |
260 | ||
78a010cc SK |
261 | memset(&fl, 0, sizeof(fl)); |
262 | ||
78a010cc SK |
263 | switch (skb->protocol) { |
264 | case htons(ETH_P_IP): | |
265 | xfrm_decode_session(skb, &fl, AF_INET); | |
266 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); | |
267 | break; | |
268 | case htons(ETH_P_IPV6): | |
269 | xfrm_decode_session(skb, &fl, AF_INET6); | |
270 | memset(IP6CB(skb), 0, sizeof(*IP6CB(skb))); | |
271 | break; | |
272 | default: | |
cb9f1b78 | 273 | goto tx_err; |
78a010cc SK |
274 | } |
275 | ||
cd5279c1 AD |
276 | /* override mark with tunnel output key */ |
277 | fl.flowi_mark = be32_to_cpu(tunnel->parms.o_key); | |
278 | ||
78a010cc | 279 | return vti_xmit(skb, dev, &fl); |
cb9f1b78 WB |
280 | |
281 | tx_err: | |
282 | dev->stats.tx_errors++; | |
283 | kfree_skb(skb); | |
284 | return NETDEV_TX_OK; | |
78a010cc SK |
285 | } |
286 | ||
df3893c1 SK |
287 | static int vti4_err(struct sk_buff *skb, u32 info) |
288 | { | |
289 | __be32 spi; | |
6d004d6c | 290 | __u32 mark; |
df3893c1 SK |
291 | struct xfrm_state *x; |
292 | struct ip_tunnel *tunnel; | |
293 | struct ip_esp_hdr *esph; | |
294 | struct ip_auth_hdr *ah ; | |
295 | struct ip_comp_hdr *ipch; | |
296 | struct net *net = dev_net(skb->dev); | |
297 | const struct iphdr *iph = (const struct iphdr *)skb->data; | |
298 | int protocol = iph->protocol; | |
299 | struct ip_tunnel_net *itn = net_generic(net, vti_net_id); | |
300 | ||
301 | tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY, | |
302 | iph->daddr, iph->saddr, 0); | |
303 | if (!tunnel) | |
304 | return -1; | |
305 | ||
6d004d6c SK |
306 | mark = be32_to_cpu(tunnel->parms.o_key); |
307 | ||
df3893c1 SK |
308 | switch (protocol) { |
309 | case IPPROTO_ESP: | |
310 | esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); | |
311 | spi = esph->spi; | |
312 | break; | |
313 | case IPPROTO_AH: | |
314 | ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2)); | |
315 | spi = ah->spi; | |
316 | break; | |
317 | case IPPROTO_COMP: | |
318 | ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2)); | |
319 | spi = htonl(ntohs(ipch->cpi)); | |
320 | break; | |
321 | default: | |
322 | return 0; | |
323 | } | |
324 | ||
325 | switch (icmp_hdr(skb)->type) { | |
326 | case ICMP_DEST_UNREACH: | |
327 | if (icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) | |
328 | return 0; | |
329 | case ICMP_REDIRECT: | |
330 | break; | |
331 | default: | |
332 | return 0; | |
333 | } | |
334 | ||
6d004d6c | 335 | x = xfrm_state_lookup(net, mark, (const xfrm_address_t *)&iph->daddr, |
df3893c1 SK |
336 | spi, protocol, AF_INET); |
337 | if (!x) | |
338 | return 0; | |
339 | ||
340 | if (icmp_hdr(skb)->type == ICMP_DEST_UNREACH) | |
d888f396 | 341 | ipv4_update_pmtu(skb, net, info, 0, protocol); |
df3893c1 | 342 | else |
1042caa7 | 343 | ipv4_redirect(skb, net, 0, protocol); |
df3893c1 SK |
344 | xfrm_state_put(x); |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
1181412c S |
349 | static int |
350 | vti_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
351 | { | |
352 | int err = 0; | |
353 | struct ip_tunnel_parm p; | |
1181412c | 354 | |
b9959fd3 AW |
355 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
356 | return -EFAULT; | |
1181412c | 357 | |
b9959fd3 | 358 | if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) { |
1181412c S |
359 | if (p.iph.version != 4 || p.iph.protocol != IPPROTO_IPIP || |
360 | p.iph.ihl != 5) | |
b9959fd3 AW |
361 | return -EINVAL; |
362 | } | |
1181412c | 363 | |
7c8e6b9c DP |
364 | if (!(p.i_flags & GRE_KEY)) |
365 | p.i_key = 0; | |
366 | if (!(p.o_flags & GRE_KEY)) | |
367 | p.o_key = 0; | |
368 | ||
369 | p.i_flags = VTI_ISVTI; | |
370 | ||
b9959fd3 AW |
371 | err = ip_tunnel_ioctl(dev, &p, cmd); |
372 | if (err) | |
373 | return err; | |
1181412c | 374 | |
b9959fd3 | 375 | if (cmd != SIOCDELTUNNEL) { |
df3893c1 | 376 | p.i_flags |= GRE_KEY; |
b9959fd3 | 377 | p.o_flags |= GRE_KEY; |
1181412c S |
378 | } |
379 | ||
b9959fd3 AW |
380 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p))) |
381 | return -EFAULT; | |
1181412c S |
382 | return 0; |
383 | } | |
384 | ||
385 | static const struct net_device_ops vti_netdev_ops = { | |
386 | .ndo_init = vti_tunnel_init, | |
b9959fd3 | 387 | .ndo_uninit = ip_tunnel_uninit, |
1181412c S |
388 | .ndo_start_xmit = vti_tunnel_xmit, |
389 | .ndo_do_ioctl = vti_tunnel_ioctl, | |
b9959fd3 | 390 | .ndo_change_mtu = ip_tunnel_change_mtu, |
f61dd388 | 391 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
1e99584b | 392 | .ndo_get_iflink = ip_tunnel_get_iflink, |
1181412c S |
393 | }; |
394 | ||
b9959fd3 | 395 | static void vti_tunnel_setup(struct net_device *dev) |
1181412c | 396 | { |
b9959fd3 | 397 | dev->netdev_ops = &vti_netdev_ops; |
8d89dcdf | 398 | dev->type = ARPHRD_TUNNEL; |
b9959fd3 | 399 | ip_tunnel_setup(dev, vti_net_id); |
1181412c S |
400 | } |
401 | ||
b9959fd3 | 402 | static int vti_tunnel_init(struct net_device *dev) |
1181412c | 403 | { |
b9959fd3 AW |
404 | struct ip_tunnel *tunnel = netdev_priv(dev); |
405 | struct iphdr *iph = &tunnel->parms.iph; | |
406 | ||
407 | memcpy(dev->dev_addr, &iph->saddr, 4); | |
408 | memcpy(dev->broadcast, &iph->daddr, 4); | |
1181412c | 409 | |
1181412c | 410 | dev->flags = IFF_NOARP; |
1181412c | 411 | dev->addr_len = 4; |
1181412c | 412 | dev->features |= NETIF_F_LLTX; |
02875878 | 413 | netif_keep_dst(dev); |
1181412c | 414 | |
b9959fd3 | 415 | return ip_tunnel_init(dev); |
1181412c S |
416 | } |
417 | ||
b9959fd3 | 418 | static void __net_init vti_fb_tunnel_init(struct net_device *dev) |
1181412c S |
419 | { |
420 | struct ip_tunnel *tunnel = netdev_priv(dev); | |
421 | struct iphdr *iph = &tunnel->parms.iph; | |
1181412c | 422 | |
1181412c S |
423 | iph->version = 4; |
424 | iph->protocol = IPPROTO_IPIP; | |
425 | iph->ihl = 5; | |
1181412c S |
426 | } |
427 | ||
df3893c1 | 428 | static struct xfrm4_protocol vti_esp4_protocol __read_mostly = { |
f981c57f JS |
429 | .handler = vti_rcv_proto, |
430 | .input_handler = vti_input_proto, | |
df3893c1 SK |
431 | .cb_handler = vti_rcv_cb, |
432 | .err_handler = vti4_err, | |
433 | .priority = 100, | |
434 | }; | |
435 | ||
436 | static struct xfrm4_protocol vti_ah4_protocol __read_mostly = { | |
f981c57f JS |
437 | .handler = vti_rcv_proto, |
438 | .input_handler = vti_input_proto, | |
df3893c1 SK |
439 | .cb_handler = vti_rcv_cb, |
440 | .err_handler = vti4_err, | |
441 | .priority = 100, | |
442 | }; | |
443 | ||
444 | static struct xfrm4_protocol vti_ipcomp4_protocol __read_mostly = { | |
f981c57f JS |
445 | .handler = vti_rcv_proto, |
446 | .input_handler = vti_input_proto, | |
df3893c1 SK |
447 | .cb_handler = vti_rcv_cb, |
448 | .err_handler = vti4_err, | |
449 | .priority = 100, | |
1181412c S |
450 | }; |
451 | ||
dd9ee344 | 452 | static struct xfrm_tunnel ipip_handler __read_mostly = { |
f981c57f | 453 | .handler = vti_rcv_tunnel, |
dd9ee344 SY |
454 | .err_handler = vti4_err, |
455 | .priority = 0, | |
456 | }; | |
457 | ||
1181412c S |
458 | static int __net_init vti_init_net(struct net *net) |
459 | { | |
460 | int err; | |
b9959fd3 | 461 | struct ip_tunnel_net *itn; |
1181412c | 462 | |
b9959fd3 | 463 | err = ip_tunnel_init_net(net, vti_net_id, &vti_link_ops, "ip_vti0"); |
1181412c | 464 | if (err) |
b9959fd3 AW |
465 | return err; |
466 | itn = net_generic(net, vti_net_id); | |
cd1aa9c2 HY |
467 | if (itn->fb_tunnel_dev) |
468 | vti_fb_tunnel_init(itn->fb_tunnel_dev); | |
1181412c | 469 | return 0; |
1181412c S |
470 | } |
471 | ||
64bc1781 | 472 | static void __net_exit vti_exit_batch_net(struct list_head *list_net) |
1181412c | 473 | { |
64bc1781 | 474 | ip_tunnel_delete_nets(list_net, vti_net_id, &vti_link_ops); |
1181412c S |
475 | } |
476 | ||
477 | static struct pernet_operations vti_net_ops = { | |
478 | .init = vti_init_net, | |
64bc1781 | 479 | .exit_batch = vti_exit_batch_net, |
1181412c | 480 | .id = &vti_net_id, |
b9959fd3 | 481 | .size = sizeof(struct ip_tunnel_net), |
1181412c S |
482 | }; |
483 | ||
a8b8a889 MS |
484 | static int vti_tunnel_validate(struct nlattr *tb[], struct nlattr *data[], |
485 | struct netlink_ext_ack *extack) | |
1181412c S |
486 | { |
487 | return 0; | |
488 | } | |
489 | ||
490 | static void vti_netlink_parms(struct nlattr *data[], | |
9830ad4c CG |
491 | struct ip_tunnel_parm *parms, |
492 | __u32 *fwmark) | |
1181412c S |
493 | { |
494 | memset(parms, 0, sizeof(*parms)); | |
495 | ||
496 | parms->iph.protocol = IPPROTO_IPIP; | |
497 | ||
498 | if (!data) | |
499 | return; | |
500 | ||
df3893c1 SK |
501 | parms->i_flags = VTI_ISVTI; |
502 | ||
1181412c S |
503 | if (data[IFLA_VTI_LINK]) |
504 | parms->link = nla_get_u32(data[IFLA_VTI_LINK]); | |
505 | ||
506 | if (data[IFLA_VTI_IKEY]) | |
507 | parms->i_key = nla_get_be32(data[IFLA_VTI_IKEY]); | |
508 | ||
509 | if (data[IFLA_VTI_OKEY]) | |
510 | parms->o_key = nla_get_be32(data[IFLA_VTI_OKEY]); | |
511 | ||
512 | if (data[IFLA_VTI_LOCAL]) | |
67b61f6c | 513 | parms->iph.saddr = nla_get_in_addr(data[IFLA_VTI_LOCAL]); |
1181412c S |
514 | |
515 | if (data[IFLA_VTI_REMOTE]) | |
67b61f6c | 516 | parms->iph.daddr = nla_get_in_addr(data[IFLA_VTI_REMOTE]); |
1181412c | 517 | |
9830ad4c CG |
518 | if (data[IFLA_VTI_FWMARK]) |
519 | *fwmark = nla_get_u32(data[IFLA_VTI_FWMARK]); | |
1181412c S |
520 | } |
521 | ||
522 | static int vti_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
523 | struct nlattr *tb[], struct nlattr *data[], |
524 | struct netlink_ext_ack *extack) | |
1181412c | 525 | { |
b9959fd3 | 526 | struct ip_tunnel_parm parms; |
9830ad4c | 527 | __u32 fwmark = 0; |
1181412c | 528 | |
9830ad4c CG |
529 | vti_netlink_parms(data, &parms, &fwmark); |
530 | return ip_tunnel_newlink(dev, tb, &parms, fwmark); | |
1181412c S |
531 | } |
532 | ||
533 | static int vti_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
534 | struct nlattr *data[], |
535 | struct netlink_ext_ack *extack) | |
1181412c | 536 | { |
9830ad4c CG |
537 | struct ip_tunnel *t = netdev_priv(dev); |
538 | __u32 fwmark = t->fwmark; | |
1181412c | 539 | struct ip_tunnel_parm p; |
1181412c | 540 | |
9830ad4c CG |
541 | vti_netlink_parms(data, &p, &fwmark); |
542 | return ip_tunnel_changelink(dev, tb, &p, fwmark); | |
1181412c S |
543 | } |
544 | ||
545 | static size_t vti_get_size(const struct net_device *dev) | |
546 | { | |
547 | return | |
548 | /* IFLA_VTI_LINK */ | |
549 | nla_total_size(4) + | |
550 | /* IFLA_VTI_IKEY */ | |
551 | nla_total_size(4) + | |
552 | /* IFLA_VTI_OKEY */ | |
553 | nla_total_size(4) + | |
554 | /* IFLA_VTI_LOCAL */ | |
555 | nla_total_size(4) + | |
556 | /* IFLA_VTI_REMOTE */ | |
557 | nla_total_size(4) + | |
9830ad4c CG |
558 | /* IFLA_VTI_FWMARK */ |
559 | nla_total_size(4) + | |
1181412c S |
560 | 0; |
561 | } | |
562 | ||
563 | static int vti_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
564 | { | |
565 | struct ip_tunnel *t = netdev_priv(dev); | |
566 | struct ip_tunnel_parm *p = &t->parms; | |
567 | ||
8ed508fd HL |
568 | if (nla_put_u32(skb, IFLA_VTI_LINK, p->link) || |
569 | nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key) || | |
570 | nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key) || | |
571 | nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr) || | |
572 | nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr) || | |
573 | nla_put_u32(skb, IFLA_VTI_FWMARK, t->fwmark)) | |
574 | return -EMSGSIZE; | |
1181412c S |
575 | |
576 | return 0; | |
577 | } | |
578 | ||
579 | static const struct nla_policy vti_policy[IFLA_VTI_MAX + 1] = { | |
580 | [IFLA_VTI_LINK] = { .type = NLA_U32 }, | |
581 | [IFLA_VTI_IKEY] = { .type = NLA_U32 }, | |
582 | [IFLA_VTI_OKEY] = { .type = NLA_U32 }, | |
583 | [IFLA_VTI_LOCAL] = { .len = FIELD_SIZEOF(struct iphdr, saddr) }, | |
584 | [IFLA_VTI_REMOTE] = { .len = FIELD_SIZEOF(struct iphdr, daddr) }, | |
9830ad4c | 585 | [IFLA_VTI_FWMARK] = { .type = NLA_U32 }, |
1181412c S |
586 | }; |
587 | ||
588 | static struct rtnl_link_ops vti_link_ops __read_mostly = { | |
589 | .kind = "vti", | |
590 | .maxtype = IFLA_VTI_MAX, | |
591 | .policy = vti_policy, | |
592 | .priv_size = sizeof(struct ip_tunnel), | |
593 | .setup = vti_tunnel_setup, | |
594 | .validate = vti_tunnel_validate, | |
595 | .newlink = vti_newlink, | |
596 | .changelink = vti_changelink, | |
20ea60ca | 597 | .dellink = ip_tunnel_dellink, |
1181412c S |
598 | .get_size = vti_get_size, |
599 | .fill_info = vti_fill_info, | |
1728d4fa | 600 | .get_link_net = ip_tunnel_get_link_net, |
1181412c S |
601 | }; |
602 | ||
603 | static int __init vti_init(void) | |
604 | { | |
1990e4f8 | 605 | const char *msg; |
1181412c S |
606 | int err; |
607 | ||
1990e4f8 | 608 | pr_info("IPv4 over IPsec tunneling driver\n"); |
1181412c | 609 | |
1990e4f8 | 610 | msg = "tunnel device"; |
1181412c S |
611 | err = register_pernet_device(&vti_net_ops); |
612 | if (err < 0) | |
1990e4f8 | 613 | goto pernet_dev_failed; |
df3893c1 | 614 | |
1990e4f8 MK |
615 | msg = "tunnel protocols"; |
616 | err = xfrm4_protocol_register(&vti_esp4_protocol, IPPROTO_ESP); | |
617 | if (err < 0) | |
618 | goto xfrm_proto_esp_failed; | |
df3893c1 | 619 | err = xfrm4_protocol_register(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 MK |
620 | if (err < 0) |
621 | goto xfrm_proto_ah_failed; | |
df3893c1 | 622 | err = xfrm4_protocol_register(&vti_ipcomp4_protocol, IPPROTO_COMP); |
1990e4f8 MK |
623 | if (err < 0) |
624 | goto xfrm_proto_comp_failed; | |
1181412c | 625 | |
dd9ee344 SY |
626 | msg = "ipip tunnel"; |
627 | err = xfrm4_tunnel_register(&ipip_handler, AF_INET); | |
01ce31c5 | 628 | if (err < 0) |
dd9ee344 | 629 | goto xfrm_tunnel_failed; |
dd9ee344 | 630 | |
1990e4f8 | 631 | msg = "netlink interface"; |
1181412c S |
632 | err = rtnl_link_register(&vti_link_ops); |
633 | if (err < 0) | |
634 | goto rtnl_link_failed; | |
635 | ||
636 | return err; | |
637 | ||
638 | rtnl_link_failed: | |
dd9ee344 | 639 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
5483844c JS |
640 | xfrm_tunnel_failed: |
641 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); | |
1990e4f8 | 642 | xfrm_proto_comp_failed: |
df3893c1 | 643 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); |
1990e4f8 | 644 | xfrm_proto_ah_failed: |
df3893c1 | 645 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); |
1990e4f8 | 646 | xfrm_proto_esp_failed: |
1181412c | 647 | unregister_pernet_device(&vti_net_ops); |
1990e4f8 MK |
648 | pernet_dev_failed: |
649 | pr_err("vti init: failed to register %s\n", msg); | |
1181412c S |
650 | return err; |
651 | } | |
652 | ||
653 | static void __exit vti_fini(void) | |
654 | { | |
655 | rtnl_link_unregister(&vti_link_ops); | |
5483844c | 656 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
1990e4f8 MK |
657 | xfrm4_protocol_deregister(&vti_ipcomp4_protocol, IPPROTO_COMP); |
658 | xfrm4_protocol_deregister(&vti_ah4_protocol, IPPROTO_AH); | |
659 | xfrm4_protocol_deregister(&vti_esp4_protocol, IPPROTO_ESP); | |
1181412c S |
660 | unregister_pernet_device(&vti_net_ops); |
661 | } | |
662 | ||
663 | module_init(vti_init); | |
664 | module_exit(vti_fini); | |
665 | MODULE_LICENSE("GPL"); | |
666 | MODULE_ALIAS_RTNL_LINK("vti"); | |
667 | MODULE_ALIAS_NETDEV("ip_vti0"); |