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1 | /* | |
2 | * link_ip6tnl.c ip6tnl driver module | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Nicolas Dichtel <nicolas.dichtel@6wind.com> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <string.h> | |
14 | #include <net/if.h> | |
15 | #include <sys/types.h> | |
16 | #include <sys/socket.h> | |
17 | #include <arpa/inet.h> | |
18 | ||
19 | #include <linux/ip.h> | |
20 | #include <linux/if_tunnel.h> | |
21 | #include <linux/ip6_tunnel.h> | |
22 | #include "rt_names.h" | |
23 | #include "utils.h" | |
24 | #include "ip_common.h" | |
25 | #include "tunnel.h" | |
26 | ||
27 | #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000) | |
28 | #define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF) | |
29 | ||
30 | #define DEFAULT_TNL_HOP_LIMIT (64) | |
31 | ||
32 | static void print_usage(FILE *f) | |
33 | { | |
34 | fprintf(f, | |
35 | "Usage: ... ip6tnl [ mode { ip6ip6 | ipip6 | any } ]\n" | |
36 | " [ remote ADDR ]\n" | |
37 | " [ local ADDR ]\n" | |
38 | " [ dev PHYS_DEV ]\n" | |
39 | " [ encaplimit ELIM ]\n" | |
40 | " [ hoplimit HLIM ]\n" | |
41 | " [ tclass TCLASS ]\n" | |
42 | " [ flowlabel FLOWLABEL ]\n" | |
43 | " [ dscp inherit ]\n" | |
44 | " [ fwmark MARK ]\n" | |
45 | " [ [no]allow-localremote ]\n" | |
46 | " [ noencap ]\n" | |
47 | " [ encap { fou | gue | none } ]\n" | |
48 | " [ encap-sport PORT ]\n" | |
49 | " [ encap-dport PORT ]\n" | |
50 | " [ [no]encap-csum ]\n" | |
51 | " [ [no]encap-csum6 ]\n" | |
52 | " [ [no]encap-remcsum ]\n" | |
53 | " [ external ]\n" | |
54 | "\n" | |
55 | "Where: ADDR := IPV6_ADDRESS\n" | |
56 | " ELIM := { none | 0..255 }(default=%d)\n" | |
57 | " HLIM := 0..255 (default=%d)\n" | |
58 | " TCLASS := { 0x0..0xff | inherit }\n" | |
59 | " FLOWLABEL := { 0x0..0xfffff | inherit }\n" | |
60 | " MARK := { 0x0..0xffffffff | inherit }\n", | |
61 | IPV6_DEFAULT_TNL_ENCAP_LIMIT, DEFAULT_TNL_HOP_LIMIT | |
62 | ); | |
63 | } | |
64 | ||
65 | static void usage(void) __attribute__((noreturn)); | |
66 | static void usage(void) | |
67 | { | |
68 | print_usage(stderr); | |
69 | exit(-1); | |
70 | } | |
71 | ||
72 | static int ip6tunnel_parse_opt(struct link_util *lu, int argc, char **argv, | |
73 | struct nlmsghdr *n) | |
74 | { | |
75 | struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); | |
76 | struct { | |
77 | struct nlmsghdr n; | |
78 | struct ifinfomsg i; | |
79 | } req = { | |
80 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)), | |
81 | .n.nlmsg_flags = NLM_F_REQUEST, | |
82 | .n.nlmsg_type = RTM_GETLINK, | |
83 | .i.ifi_family = preferred_family, | |
84 | .i.ifi_index = ifi->ifi_index, | |
85 | }; | |
86 | struct nlmsghdr *answer; | |
87 | struct rtattr *tb[IFLA_MAX + 1]; | |
88 | struct rtattr *linkinfo[IFLA_INFO_MAX+1]; | |
89 | struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1]; | |
90 | int len; | |
91 | struct in6_addr laddr = IN6ADDR_ANY_INIT; | |
92 | struct in6_addr raddr = IN6ADDR_ANY_INIT; | |
93 | __u8 hop_limit = DEFAULT_TNL_HOP_LIMIT; | |
94 | __u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT; | |
95 | __u32 flowinfo = 0; | |
96 | __u32 flags = 0; | |
97 | __u32 link = 0; | |
98 | __u8 proto = 0; | |
99 | __u16 encaptype = 0; | |
100 | __u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6; | |
101 | __u16 encapsport = 0; | |
102 | __u16 encapdport = 0; | |
103 | __u8 metadata = 0; | |
104 | __u32 fwmark = 0; | |
105 | ||
106 | if (!(n->nlmsg_flags & NLM_F_CREATE)) { | |
107 | if (rtnl_talk(&rth, &req.n, &answer) < 0) { | |
108 | get_failed: | |
109 | fprintf(stderr, | |
110 | "Failed to get existing tunnel info.\n"); | |
111 | return -1; | |
112 | } | |
113 | ||
114 | len = answer->nlmsg_len; | |
115 | len -= NLMSG_LENGTH(sizeof(*ifi)); | |
116 | if (len < 0) | |
117 | goto get_failed; | |
118 | ||
119 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len); | |
120 | ||
121 | if (!tb[IFLA_LINKINFO]) | |
122 | goto get_failed; | |
123 | ||
124 | parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); | |
125 | ||
126 | if (!linkinfo[IFLA_INFO_DATA]) | |
127 | goto get_failed; | |
128 | ||
129 | parse_rtattr_nested(iptuninfo, IFLA_IPTUN_MAX, | |
130 | linkinfo[IFLA_INFO_DATA]); | |
131 | ||
132 | if (iptuninfo[IFLA_IPTUN_LOCAL]) | |
133 | memcpy(&laddr, RTA_DATA(iptuninfo[IFLA_IPTUN_LOCAL]), | |
134 | sizeof(laddr)); | |
135 | ||
136 | if (iptuninfo[IFLA_IPTUN_REMOTE]) | |
137 | memcpy(&raddr, RTA_DATA(iptuninfo[IFLA_IPTUN_REMOTE]), | |
138 | sizeof(raddr)); | |
139 | ||
140 | if (iptuninfo[IFLA_IPTUN_TTL]) | |
141 | hop_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]); | |
142 | ||
143 | if (iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]) | |
144 | encap_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]); | |
145 | ||
146 | if (iptuninfo[IFLA_IPTUN_FLOWINFO]) | |
147 | flowinfo = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLOWINFO]); | |
148 | ||
149 | if (iptuninfo[IFLA_IPTUN_FLAGS]) | |
150 | flags = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLAGS]); | |
151 | ||
152 | if (iptuninfo[IFLA_IPTUN_LINK]) | |
153 | link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]); | |
154 | ||
155 | if (iptuninfo[IFLA_IPTUN_PROTO]) | |
156 | proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]); | |
157 | if (iptuninfo[IFLA_IPTUN_COLLECT_METADATA]) | |
158 | metadata = 1; | |
159 | ||
160 | if (iptuninfo[IFLA_IPTUN_FWMARK]) | |
161 | fwmark = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FWMARK]); | |
162 | ||
163 | free(answer); | |
164 | } | |
165 | ||
166 | while (argc > 0) { | |
167 | if (matches(*argv, "mode") == 0) { | |
168 | NEXT_ARG(); | |
169 | if (strcmp(*argv, "ipv6/ipv6") == 0 || | |
170 | strcmp(*argv, "ip6ip6") == 0) | |
171 | proto = IPPROTO_IPV6; | |
172 | else if (strcmp(*argv, "ip/ipv6") == 0 || | |
173 | strcmp(*argv, "ipv4/ipv6") == 0 || | |
174 | strcmp(*argv, "ipip6") == 0 || | |
175 | strcmp(*argv, "ip4ip6") == 0) | |
176 | proto = IPPROTO_IPIP; | |
177 | else if (strcmp(*argv, "any/ipv6") == 0 || | |
178 | strcmp(*argv, "any") == 0) | |
179 | proto = 0; | |
180 | else | |
181 | invarg("Cannot guess tunnel mode.", *argv); | |
182 | } else if (strcmp(*argv, "remote") == 0) { | |
183 | inet_prefix addr; | |
184 | ||
185 | NEXT_ARG(); | |
186 | get_addr(&addr, *argv, AF_INET6); | |
187 | memcpy(&raddr, addr.data, sizeof(raddr)); | |
188 | } else if (strcmp(*argv, "local") == 0) { | |
189 | inet_prefix addr; | |
190 | ||
191 | NEXT_ARG(); | |
192 | get_addr(&addr, *argv, AF_INET6); | |
193 | memcpy(&laddr, addr.data, sizeof(laddr)); | |
194 | } else if (matches(*argv, "dev") == 0) { | |
195 | NEXT_ARG(); | |
196 | link = if_nametoindex(*argv); | |
197 | if (link == 0) | |
198 | invarg("\"dev\" is invalid", *argv); | |
199 | } else if (strcmp(*argv, "ttl") == 0 || | |
200 | strcmp(*argv, "hoplimit") == 0 || | |
201 | strcmp(*argv, "hlim") == 0) { | |
202 | NEXT_ARG(); | |
203 | if (strcmp(*argv, "inherit") != 0) { | |
204 | if (get_u8(&hop_limit, *argv, 0)) | |
205 | invarg("invalid HLIM\n", *argv); | |
206 | } else | |
207 | hop_limit = 0; | |
208 | } else if (strcmp(*argv, "encaplimit") == 0) { | |
209 | NEXT_ARG(); | |
210 | if (strcmp(*argv, "none") == 0) { | |
211 | flags |= IP6_TNL_F_IGN_ENCAP_LIMIT; | |
212 | } else { | |
213 | __u8 uval; | |
214 | ||
215 | if (get_u8(&uval, *argv, 0) < -1) | |
216 | invarg("invalid ELIM", *argv); | |
217 | encap_limit = uval; | |
218 | flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT; | |
219 | } | |
220 | } else if (strcmp(*argv, "tclass") == 0 || | |
221 | strcmp(*argv, "tc") == 0 || | |
222 | strcmp(*argv, "tos") == 0 || | |
223 | matches(*argv, "dsfield") == 0) { | |
224 | __u8 uval; | |
225 | ||
226 | NEXT_ARG(); | |
227 | flowinfo &= ~IP6_FLOWINFO_TCLASS; | |
228 | if (strcmp(*argv, "inherit") == 0) | |
229 | flags |= IP6_TNL_F_USE_ORIG_TCLASS; | |
230 | else { | |
231 | if (get_u8(&uval, *argv, 16)) | |
232 | invarg("invalid TClass", *argv); | |
233 | flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS; | |
234 | flags &= ~IP6_TNL_F_USE_ORIG_TCLASS; | |
235 | } | |
236 | } else if (strcmp(*argv, "flowlabel") == 0 || | |
237 | strcmp(*argv, "fl") == 0) { | |
238 | __u32 uval; | |
239 | ||
240 | NEXT_ARG(); | |
241 | flowinfo &= ~IP6_FLOWINFO_FLOWLABEL; | |
242 | if (strcmp(*argv, "inherit") == 0) | |
243 | flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL; | |
244 | else { | |
245 | if (get_u32(&uval, *argv, 16)) | |
246 | invarg("invalid Flowlabel", *argv); | |
247 | if (uval > 0xFFFFF) | |
248 | invarg("invalid Flowlabel", *argv); | |
249 | flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL; | |
250 | flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL; | |
251 | } | |
252 | } else if (strcmp(*argv, "dscp") == 0) { | |
253 | NEXT_ARG(); | |
254 | if (strcmp(*argv, "inherit") != 0) | |
255 | invarg("not inherit", *argv); | |
256 | flags |= IP6_TNL_F_RCV_DSCP_COPY; | |
257 | } else if (strcmp(*argv, "fwmark") == 0) { | |
258 | NEXT_ARG(); | |
259 | if (strcmp(*argv, "inherit") == 0) { | |
260 | flags |= IP6_TNL_F_USE_ORIG_FWMARK; | |
261 | fwmark = 0; | |
262 | } else { | |
263 | if (get_u32(&fwmark, *argv, 0)) | |
264 | invarg("invalid fwmark\n", *argv); | |
265 | flags &= ~IP6_TNL_F_USE_ORIG_FWMARK; | |
266 | } | |
267 | } else if (strcmp(*argv, "allow-localremote") == 0) { | |
268 | flags |= IP6_TNL_F_ALLOW_LOCAL_REMOTE; | |
269 | } else if (strcmp(*argv, "noallow-localremote") == 0) { | |
270 | flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE; | |
271 | } else if (strcmp(*argv, "noencap") == 0) { | |
272 | encaptype = TUNNEL_ENCAP_NONE; | |
273 | } else if (strcmp(*argv, "encap") == 0) { | |
274 | NEXT_ARG(); | |
275 | if (strcmp(*argv, "fou") == 0) | |
276 | encaptype = TUNNEL_ENCAP_FOU; | |
277 | else if (strcmp(*argv, "gue") == 0) | |
278 | encaptype = TUNNEL_ENCAP_GUE; | |
279 | else if (strcmp(*argv, "none") == 0) | |
280 | encaptype = TUNNEL_ENCAP_NONE; | |
281 | else | |
282 | invarg("Invalid encap type.", *argv); | |
283 | } else if (strcmp(*argv, "encap-sport") == 0) { | |
284 | NEXT_ARG(); | |
285 | if (strcmp(*argv, "auto") == 0) | |
286 | encapsport = 0; | |
287 | else if (get_u16(&encapsport, *argv, 0)) | |
288 | invarg("Invalid source port.", *argv); | |
289 | } else if (strcmp(*argv, "encap-dport") == 0) { | |
290 | NEXT_ARG(); | |
291 | if (get_u16(&encapdport, *argv, 0)) | |
292 | invarg("Invalid destination port.", *argv); | |
293 | } else if (strcmp(*argv, "encap-csum") == 0) { | |
294 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM; | |
295 | } else if (strcmp(*argv, "noencap-csum") == 0) { | |
296 | encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM; | |
297 | } else if (strcmp(*argv, "encap-udp6-csum") == 0) { | |
298 | encapflags |= TUNNEL_ENCAP_FLAG_CSUM6; | |
299 | } else if (strcmp(*argv, "noencap-udp6-csum") == 0) { | |
300 | encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6; | |
301 | } else if (strcmp(*argv, "encap-remcsum") == 0) { | |
302 | encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM; | |
303 | } else if (strcmp(*argv, "noencap-remcsum") == 0) { | |
304 | encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM; | |
305 | } else if (strcmp(*argv, "external") == 0) { | |
306 | metadata = 1; | |
307 | } else | |
308 | usage(); | |
309 | argc--, argv++; | |
310 | } | |
311 | ||
312 | addattr8(n, 1024, IFLA_IPTUN_PROTO, proto); | |
313 | if (metadata) { | |
314 | addattr_l(n, 1024, IFLA_IPTUN_COLLECT_METADATA, NULL, 0); | |
315 | return 0; | |
316 | } | |
317 | addattr_l(n, 1024, IFLA_IPTUN_LOCAL, &laddr, sizeof(laddr)); | |
318 | addattr_l(n, 1024, IFLA_IPTUN_REMOTE, &raddr, sizeof(raddr)); | |
319 | addattr8(n, 1024, IFLA_IPTUN_TTL, hop_limit); | |
320 | addattr8(n, 1024, IFLA_IPTUN_ENCAP_LIMIT, encap_limit); | |
321 | addattr32(n, 1024, IFLA_IPTUN_FLOWINFO, flowinfo); | |
322 | addattr32(n, 1024, IFLA_IPTUN_FLAGS, flags); | |
323 | addattr32(n, 1024, IFLA_IPTUN_LINK, link); | |
324 | addattr32(n, 1024, IFLA_IPTUN_FWMARK, fwmark); | |
325 | ||
326 | addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype); | |
327 | addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags); | |
328 | addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport)); | |
329 | addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport)); | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | static void ip6tunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
335 | { | |
336 | char s2[64]; | |
337 | int flags = 0; | |
338 | __u32 flowinfo = 0; | |
339 | __u8 ttl = 0; | |
340 | ||
341 | if (!tb) | |
342 | return; | |
343 | ||
344 | if (tb[IFLA_IPTUN_COLLECT_METADATA]) | |
345 | print_bool(PRINT_ANY, "external", "external ", true); | |
346 | ||
347 | if (tb[IFLA_IPTUN_FLAGS]) | |
348 | flags = rta_getattr_u32(tb[IFLA_IPTUN_FLAGS]); | |
349 | ||
350 | if (tb[IFLA_IPTUN_FLOWINFO]) | |
351 | flowinfo = rta_getattr_u32(tb[IFLA_IPTUN_FLOWINFO]); | |
352 | ||
353 | if (tb[IFLA_IPTUN_PROTO]) { | |
354 | switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) { | |
355 | case IPPROTO_IPIP: | |
356 | print_string(PRINT_ANY, "proto", "%s ", "ipip6"); | |
357 | break; | |
358 | case IPPROTO_IPV6: | |
359 | print_string(PRINT_ANY, "proto", "%s ", "ip6ip6"); | |
360 | break; | |
361 | case 0: | |
362 | print_string(PRINT_ANY, "proto", "%s ", "any"); | |
363 | break; | |
364 | } | |
365 | } | |
366 | ||
367 | if (tb[IFLA_IPTUN_REMOTE]) { | |
368 | print_string(PRINT_ANY, | |
369 | "remote", | |
370 | "remote %s ", | |
371 | rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_REMOTE])); | |
372 | } | |
373 | ||
374 | if (tb[IFLA_IPTUN_LOCAL]) { | |
375 | print_string(PRINT_ANY, | |
376 | "local", | |
377 | "local %s ", | |
378 | rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_LOCAL])); | |
379 | } | |
380 | ||
381 | if (tb[IFLA_IPTUN_LINK]) { | |
382 | unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]); | |
383 | ||
384 | if (link) { | |
385 | print_string(PRINT_ANY, "link", "dev %s ", | |
386 | ll_index_to_name(link)); | |
387 | } | |
388 | } | |
389 | ||
390 | if (tb[IFLA_IPTUN_TTL]) | |
391 | ttl = rta_getattr_u8(tb[IFLA_IPTUN_TTL]); | |
392 | if (is_json_context() || ttl) | |
393 | print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl); | |
394 | else | |
395 | print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit"); | |
396 | ||
397 | if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) { | |
398 | print_bool(PRINT_ANY, | |
399 | "ip6_tnl_f_ign_encap_limit", | |
400 | "encaplimit none ", | |
401 | true); | |
402 | } else if (tb[IFLA_IPTUN_ENCAP_LIMIT]) { | |
403 | __u8 val = rta_getattr_u8(tb[IFLA_IPTUN_ENCAP_LIMIT]); | |
404 | ||
405 | print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val); | |
406 | } | |
407 | ||
408 | if (flags & IP6_TNL_F_USE_ORIG_TCLASS) { | |
409 | print_bool(PRINT_ANY, | |
410 | "ip6_tnl_f_use_orig_tclass", | |
411 | "tclass inherit ", | |
412 | true); | |
413 | } else if (tb[IFLA_IPTUN_FLOWINFO]) { | |
414 | __u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20; | |
415 | ||
416 | snprintf(s2, sizeof(s2), "0x%02x", val); | |
417 | print_string(PRINT_ANY, "tclass", "tclass %s ", s2); | |
418 | } | |
419 | ||
420 | if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) { | |
421 | print_bool(PRINT_ANY, | |
422 | "ip6_tnl_f_use_orig_flowlabel", | |
423 | "flowlabel inherit ", | |
424 | true); | |
425 | } else if (tb[IFLA_IPTUN_FLOWINFO]) { | |
426 | __u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL); | |
427 | ||
428 | snprintf(s2, sizeof(s2), "0x%05x", val); | |
429 | print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2); | |
430 | } | |
431 | ||
432 | if (flags & IP6_TNL_F_RCV_DSCP_COPY) | |
433 | print_bool(PRINT_ANY, | |
434 | "ip6_tnl_f_rcv_dscp_copy", | |
435 | "dscp inherit ", | |
436 | true); | |
437 | ||
438 | if (flags & IP6_TNL_F_MIP6_DEV) | |
439 | print_bool(PRINT_ANY, "ip6_tnl_f_mip6_dev", "mip6 ", true); | |
440 | ||
441 | if (flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) | |
442 | print_bool(PRINT_ANY, | |
443 | "ip6_tnl_f_allow_local_remote", | |
444 | "allow-localremote ", | |
445 | true); | |
446 | ||
447 | if (flags & IP6_TNL_F_USE_ORIG_FWMARK) { | |
448 | print_bool(PRINT_ANY, | |
449 | "ip6_tnl_f_use_orig_fwmark", | |
450 | "fwmark inherit ", | |
451 | true); | |
452 | } else if (tb[IFLA_IPTUN_FWMARK]) { | |
453 | __u32 fwmark = rta_getattr_u32(tb[IFLA_IPTUN_FWMARK]); | |
454 | ||
455 | if (fwmark) { | |
456 | print_0xhex(PRINT_ANY, | |
457 | "fwmark", "fwmark 0x%x ", fwmark); | |
458 | } | |
459 | } | |
460 | ||
461 | tnl_print_encap(tb, | |
462 | IFLA_IPTUN_ENCAP_TYPE, | |
463 | IFLA_IPTUN_ENCAP_FLAGS, | |
464 | IFLA_IPTUN_ENCAP_SPORT, | |
465 | IFLA_IPTUN_ENCAP_DPORT); | |
466 | } | |
467 | ||
468 | static void ip6tunnel_print_help(struct link_util *lu, int argc, char **argv, | |
469 | FILE *f) | |
470 | { | |
471 | print_usage(f); | |
472 | } | |
473 | ||
474 | struct link_util ip6tnl_link_util = { | |
475 | .id = "ip6tnl", | |
476 | .maxattr = IFLA_IPTUN_MAX, | |
477 | .parse_opt = ip6tunnel_parse_opt, | |
478 | .print_opt = ip6tunnel_print_opt, | |
479 | .print_help = ip6tunnel_print_help, | |
480 | }; |