blob: 8411a6a00a1b4c2c4c64e0b837d1336adbd5c8f3 [file] [log] [blame]
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +01001/*
2 * link_iptnl.c ipip and sit 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 "rt_names.h"
22#include "utils.h"
23#include "ip_common.h"
24#include "tunnel.h"
25
vadimk561e6502014-09-30 08:17:31 +030026static void print_usage(FILE *f, int sit)
27{
28 fprintf(f, "Usage: ip link { add | set | change | replace | del } NAME\n");
29 fprintf(f, " type { ipip | sit } [ remote ADDR ] [ local ADDR ]\n");
30 fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
31 fprintf(f, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
Tom Herbertc1159152014-11-05 10:06:25 -080032 fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n");
33 fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
Tom Herbert858dbb22015-01-29 08:51:58 -080034 fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
vadimk561e6502014-09-30 08:17:31 +030035 if (sit) {
36 fprintf(f, " [ mode { ip6ip | ipip | any } ]\n");
37 fprintf(f, " [ isatap ]\n");
38 }
39 fprintf(f, "\n");
40 fprintf(f, "Where: NAME := STRING\n");
41 fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
42 fprintf(f, " TOS := { NUMBER | inherit }\n");
43 fprintf(f, " TTL := { 1..255 | inherit }\n");
44}
45
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +010046static void usage(int sit) __attribute__((noreturn));
47static void usage(int sit)
48{
vadimk561e6502014-09-30 08:17:31 +030049 print_usage(stderr, sit);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +010050 exit(-1);
51}
52
53static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
54 struct nlmsghdr *n)
55{
56 struct {
57 struct nlmsghdr n;
58 struct ifinfomsg i;
59 char buf[2048];
60 } req;
61 struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
62 struct rtattr *tb[IFLA_MAX + 1];
63 struct rtattr *linkinfo[IFLA_INFO_MAX+1];
64 struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
65 int len;
66 __u32 link = 0;
67 __u32 laddr = 0;
68 __u32 raddr = 0;
69 __u8 ttl = 0;
70 __u8 tos = 0;
71 __u8 pmtudisc = 1;
72 __u16 iflags = 0;
Nicolas Dichtel77620be2013-07-16 22:54:14 +020073 __u8 proto = 0;
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +010074 struct in6_addr ip6rdprefix;
75 __u16 ip6rdprefixlen = 0;
76 __u32 ip6rdrelayprefix = 0;
77 __u16 ip6rdrelayprefixlen = 0;
Tom Herbertc1159152014-11-05 10:06:25 -080078 __u16 encaptype = 0;
79 __u16 encapflags = 0;
80 __u16 encapsport = 0;
81 __u16 encapdport = 0;
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +010082
83 memset(&ip6rdprefix, 0, sizeof(ip6rdprefix));
84
85 if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86 memset(&req, 0, sizeof(req));
87
88 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
89 req.n.nlmsg_flags = NLM_F_REQUEST;
90 req.n.nlmsg_type = RTM_GETLINK;
91 req.i.ifi_family = preferred_family;
92 req.i.ifi_index = ifi->ifi_index;
93
Stephen Hemmingerc079e122015-05-27 12:26:14 -070094 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +010095get_failed:
96 fprintf(stderr,
97 "Failed to get existing tunnel info.\n");
98 return -1;
99 }
100
101 len = req.n.nlmsg_len;
102 len -= NLMSG_LENGTH(sizeof(*ifi));
103 if (len < 0)
104 goto get_failed;
105
106 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
107
108 if (!tb[IFLA_LINKINFO])
109 goto get_failed;
110
111 parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
112
113 if (!linkinfo[IFLA_INFO_DATA])
114 goto get_failed;
115
116 parse_rtattr_nested(iptuninfo, IFLA_IPTUN_MAX,
117 linkinfo[IFLA_INFO_DATA]);
118
119 if (iptuninfo[IFLA_IPTUN_LOCAL])
120 laddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LOCAL]);
121
122 if (iptuninfo[IFLA_IPTUN_REMOTE])
123 raddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_REMOTE]);
124
125 if (iptuninfo[IFLA_IPTUN_TTL])
126 ttl = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
127
128 if (iptuninfo[IFLA_IPTUN_TOS])
129 tos = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TOS]);
130
131 if (iptuninfo[IFLA_IPTUN_PMTUDISC])
132 pmtudisc =
133 rta_getattr_u8(iptuninfo[IFLA_IPTUN_PMTUDISC]);
134
135 if (iptuninfo[IFLA_IPTUN_FLAGS])
136 iflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_FLAGS]);
137
138 if (iptuninfo[IFLA_IPTUN_LINK])
139 link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
140
Nicolas Dichtel77620be2013-07-16 22:54:14 +0200141 if (iptuninfo[IFLA_IPTUN_PROTO])
142 proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
143
Tom Herbertc1159152014-11-05 10:06:25 -0800144 if (iptuninfo[IFLA_IPTUN_ENCAP_TYPE])
145 encaptype = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_TYPE]);
146 if (iptuninfo[IFLA_IPTUN_ENCAP_FLAGS])
147 encapflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_FLAGS]);
148 if (iptuninfo[IFLA_IPTUN_ENCAP_SPORT])
149 encapsport = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_SPORT]);
150 if (iptuninfo[IFLA_IPTUN_ENCAP_DPORT])
151 encapdport = rta_getattr_u16(iptuninfo[IFLA_IPTUN_ENCAP_DPORT]);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100152 if (iptuninfo[IFLA_IPTUN_6RD_PREFIX])
153 memcpy(&ip6rdprefix,
154 RTA_DATA(iptuninfo[IFLA_IPTUN_6RD_PREFIX]),
155 sizeof(laddr));
156
157 if (iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN])
158 ip6rdprefixlen =
159 rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN]);
160
161 if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX])
162 ip6rdrelayprefix =
163 rta_getattr_u32(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX]);
164
165 if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN])
166 ip6rdrelayprefixlen =
167 rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
168 }
169
170 while (argc > 0) {
171 if (strcmp(*argv, "remote") == 0) {
172 NEXT_ARG();
173 if (strcmp(*argv, "any"))
174 raddr = get_addr32(*argv);
175 else
176 raddr = 0;
177 } else if (strcmp(*argv, "local") == 0) {
178 NEXT_ARG();
179 if (strcmp(*argv, "any"))
180 laddr = get_addr32(*argv);
181 else
182 laddr = 0;
183 } else if (matches(*argv, "dev") == 0) {
184 NEXT_ARG();
185 link = if_nametoindex(*argv);
186 if (link == 0)
187 invarg("\"dev\" is invalid", *argv);
188 } else if (strcmp(*argv, "ttl") == 0 ||
189 strcmp(*argv, "hoplimit") == 0) {
190 NEXT_ARG();
191 if (strcmp(*argv, "inherit") != 0) {
192 if (get_u8(&ttl, *argv, 0))
193 invarg("invalid TTL\n", *argv);
194 } else
195 ttl = 0;
196 } else if (strcmp(*argv, "tos") == 0 ||
197 strcmp(*argv, "tclass") == 0 ||
198 matches(*argv, "dsfield") == 0) {
199 __u32 uval;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700200
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100201 NEXT_ARG();
202 if (strcmp(*argv, "inherit") != 0) {
203 if (rtnl_dsfield_a2n(&uval, *argv))
204 invarg("bad TOS value", *argv);
205 tos = uval;
206 } else
207 tos = 1;
208 } else if (strcmp(*argv, "nopmtudisc") == 0) {
209 pmtudisc = 0;
210 } else if (strcmp(*argv, "pmtudisc") == 0) {
211 pmtudisc = 1;
212 } else if (strcmp(lu->id, "sit") == 0 &&
213 strcmp(*argv, "isatap") == 0) {
214 iflags |= SIT_ISATAP;
Nicolas Dichtel77620be2013-07-16 22:54:14 +0200215 } else if (strcmp(lu->id, "sit") == 0 &&
216 strcmp(*argv, "mode") == 0) {
217 NEXT_ARG();
218 if (strcmp(*argv, "ipv6/ipv4") == 0 ||
219 strcmp(*argv, "ip6ip") == 0)
220 proto = IPPROTO_IPV6;
221 else if (strcmp(*argv, "ipv4/ipv4") == 0 ||
222 strcmp(*argv, "ipip") == 0 ||
223 strcmp(*argv, "ip4ip4") == 0)
224 proto = IPPROTO_IPIP;
225 else if (strcmp(*argv, "any/ipv4") == 0 ||
226 strcmp(*argv, "any") == 0)
227 proto = 0;
228 else
229 invarg("Cannot guess tunnel mode.", *argv);
Tom Herbertc1159152014-11-05 10:06:25 -0800230 } else if (strcmp(*argv, "noencap") == 0) {
231 encaptype = TUNNEL_ENCAP_NONE;
232 } else if (strcmp(*argv, "encap") == 0) {
233 NEXT_ARG();
234 if (strcmp(*argv, "fou") == 0)
235 encaptype = TUNNEL_ENCAP_FOU;
236 else if (strcmp(*argv, "gue") == 0)
237 encaptype = TUNNEL_ENCAP_GUE;
238 else if (strcmp(*argv, "none") == 0)
239 encaptype = TUNNEL_ENCAP_NONE;
240 else
241 invarg("Invalid encap type.", *argv);
242 } else if (strcmp(*argv, "encap-sport") == 0) {
243 NEXT_ARG();
244 if (strcmp(*argv, "auto") == 0)
245 encapsport = 0;
246 else if (get_u16(&encapsport, *argv, 0))
247 invarg("Invalid source port.", *argv);
248 } else if (strcmp(*argv, "encap-dport") == 0) {
249 NEXT_ARG();
250 if (get_u16(&encapdport, *argv, 0))
251 invarg("Invalid destination port.", *argv);
252 } else if (strcmp(*argv, "encap-csum") == 0) {
253 encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
254 } else if (strcmp(*argv, "noencap-csum") == 0) {
255 encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
256 } else if (strcmp(*argv, "encap-udp6-csum") == 0) {
257 encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
258 } else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
259 encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
Tom Herbert858dbb22015-01-29 08:51:58 -0800260 } else if (strcmp(*argv, "encap-remcsum") == 0) {
261 encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
262 } else if (strcmp(*argv, "noencap-remcsum") == 0) {
263 encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100264 } else if (strcmp(*argv, "6rd-prefix") == 0) {
265 inet_prefix prefix;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700266
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100267 NEXT_ARG();
268 if (get_prefix(&prefix, *argv, AF_INET6))
269 invarg("invalid 6rd_prefix\n", *argv);
270 memcpy(&ip6rdprefix, prefix.data, 16);
271 ip6rdprefixlen = prefix.bitlen;
272 } else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
273 inet_prefix prefix;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700274
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100275 NEXT_ARG();
276 if (get_prefix(&prefix, *argv, AF_INET))
277 invarg("invalid 6rd-relay_prefix\n", *argv);
278 memcpy(&ip6rdrelayprefix, prefix.data, 4);
279 ip6rdrelayprefixlen = prefix.bitlen;
280 } else if (strcmp(*argv, "6rd-reset") == 0) {
281 inet_prefix prefix;
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700282
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100283 get_prefix(&prefix, "2002::", AF_INET6);
284 memcpy(&ip6rdprefix, prefix.data, 16);
285 ip6rdprefixlen = 16;
286 ip6rdrelayprefix = 0;
287 ip6rdrelayprefixlen = 0;
288 } else
289 usage(strcmp(lu->id, "sit") == 0);
290 argc--, argv++;
291 }
292
293 if (ttl && pmtudisc == 0) {
Richard Godbee30d07e92013-08-25 22:40:18 -0400294 fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100295 exit(-1);
296 }
297
298 addattr32(n, 1024, IFLA_IPTUN_LINK, link);
299 addattr32(n, 1024, IFLA_IPTUN_LOCAL, laddr);
300 addattr32(n, 1024, IFLA_IPTUN_REMOTE, raddr);
301 addattr8(n, 1024, IFLA_IPTUN_TTL, ttl);
302 addattr8(n, 1024, IFLA_IPTUN_TOS, tos);
303 addattr8(n, 1024, IFLA_IPTUN_PMTUDISC, pmtudisc);
Tom Herbertc1159152014-11-05 10:06:25 -0800304
305 addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype);
306 addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags);
307 addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport));
308 addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport));
309
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100310 if (strcmp(lu->id, "sit") == 0) {
311 addattr16(n, 1024, IFLA_IPTUN_FLAGS, iflags);
Nicolas Dichtel77620be2013-07-16 22:54:14 +0200312 addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100313 if (ip6rdprefixlen) {
314 addattr_l(n, 1024, IFLA_IPTUN_6RD_PREFIX,
315 &ip6rdprefix, sizeof(ip6rdprefix));
316 addattr16(n, 1024, IFLA_IPTUN_6RD_PREFIXLEN,
317 ip6rdprefixlen);
318 addattr32(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIX,
319 ip6rdrelayprefix);
320 addattr16(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
321 ip6rdrelayprefixlen);
322 }
323 }
324
325 return 0;
326}
327
328static void iptunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
329{
330 char s1[1024];
331 char s2[64];
332 const char *local = "any";
333 const char *remote = "any";
334
335 if (!tb)
336 return;
337
338 if (tb[IFLA_IPTUN_REMOTE]) {
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700339 unsigned int addr = rta_getattr_u32(tb[IFLA_IPTUN_REMOTE]);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100340
341 if (addr)
Phil Suttera418e452016-03-22 19:35:15 +0100342 remote = format_host(AF_INET, 4, &addr);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100343 }
344
345 fprintf(f, "remote %s ", remote);
346
347 if (tb[IFLA_IPTUN_LOCAL]) {
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700348 unsigned int addr = rta_getattr_u32(tb[IFLA_IPTUN_LOCAL]);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100349
350 if (addr)
Phil Suttera418e452016-03-22 19:35:15 +0100351 local = format_host(AF_INET, 4, &addr);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100352 }
353
354 fprintf(f, "local %s ", local);
355
356 if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
Stephen Hemminger56f5daa2016-03-21 11:52:19 -0700357 unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100358 const char *n = if_indextoname(link, s2);
359
360 if (n)
361 fprintf(f, "dev %s ", n);
362 else
363 fprintf(f, "dev %u ", link);
364 }
365
366 if (tb[IFLA_IPTUN_TTL] && rta_getattr_u8(tb[IFLA_IPTUN_TTL]))
367 fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_IPTUN_TTL]));
368 else
369 fprintf(f, "ttl inherit ");
370
371 if (tb[IFLA_IPTUN_TOS] && rta_getattr_u8(tb[IFLA_IPTUN_TOS])) {
372 int tos = rta_getattr_u8(tb[IFLA_IPTUN_TOS]);
373
374 fputs("tos ", f);
375 if (tos == 1)
376 fputs("inherit ", f);
377 else
378 fprintf(f, "0x%x ", tos);
379 }
380
381 if (tb[IFLA_IPTUN_PMTUDISC] && rta_getattr_u8(tb[IFLA_IPTUN_PMTUDISC]))
382 fprintf(f, "pmtudisc ");
383 else
384 fprintf(f, "nopmtudisc ");
385
386 if (tb[IFLA_IPTUN_FLAGS]) {
Nicolas Dichtel195f0f62012-12-14 09:50:33 -0800387 __u16 iflags = rta_getattr_u16(tb[IFLA_IPTUN_FLAGS]);
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100388
Nicolas Dichtel195f0f62012-12-14 09:50:33 -0800389 if (iflags & SIT_ISATAP)
390 fprintf(f, "isatap ");
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100391 }
392
393 if (tb[IFLA_IPTUN_6RD_PREFIXLEN] &&
394 *(__u16 *)RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIXLEN])) {
395 __u16 prefixlen = rta_getattr_u16(tb[IFLA_IPTUN_6RD_PREFIXLEN]);
396 __u16 relayprefixlen =
397 rta_getattr_u16(tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
398 __u32 relayprefix =
399 rta_getattr_u32(tb[IFLA_IPTUN_6RD_RELAY_PREFIX]);
400
401 printf("6rd-prefix %s/%u ",
402 inet_ntop(AF_INET6, RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIX]),
Nicolas Dichtel195f0f62012-12-14 09:50:33 -0800403 s1, sizeof(s1)),
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100404 prefixlen);
405 if (relayprefix) {
406 printf("6rd-relay_prefix %s/%u ",
Phil Suttera418e452016-03-22 19:35:15 +0100407 format_host(AF_INET, 4, &relayprefix),
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100408 relayprefixlen);
409 }
410 }
Tom Herbertc1159152014-11-05 10:06:25 -0800411
412 if (tb[IFLA_IPTUN_ENCAP_TYPE] &&
413 *(__u16 *)RTA_DATA(tb[IFLA_IPTUN_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
414 __u16 type = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_TYPE]);
415 __u16 flags = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_FLAGS]);
416 __u16 sport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_SPORT]);
417 __u16 dport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_DPORT]);
418
419 fputs("encap ", f);
420 switch (type) {
421 case TUNNEL_ENCAP_FOU:
422 fputs("fou ", f);
423 break;
424 case TUNNEL_ENCAP_GUE:
425 fputs("gue ", f);
426 break;
427 default:
428 fputs("unknown ", f);
429 break;
430 }
431
432 if (sport == 0)
433 fputs("encap-sport auto ", f);
434 else
435 fprintf(f, "encap-sport %u", ntohs(sport));
436
437 fprintf(f, "encap-dport %u ", ntohs(dport));
438
439 if (flags & TUNNEL_ENCAP_FLAG_CSUM)
440 fputs("encap-csum ", f);
441 else
442 fputs("noencap-csum ", f);
443
444 if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
445 fputs("encap-csum6 ", f);
446 else
447 fputs("noencap-csum6 ", f);
Tom Herbert858dbb22015-01-29 08:51:58 -0800448
449 if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
450 fputs("encap-remcsum ", f);
451 else
452 fputs("noencap-remcsum ", f);
Tom Herbertc1159152014-11-05 10:06:25 -0800453 }
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100454}
455
vadimk561e6502014-09-30 08:17:31 +0300456static void iptunnel_print_help(struct link_util *lu, int argc, char **argv,
457 FILE *f)
458{
459 print_usage(f, strcmp(lu->id, "sit") == 0);
460}
461
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100462struct link_util ipip_link_util = {
463 .id = "ipip",
464 .maxattr = IFLA_IPTUN_MAX,
465 .parse_opt = iptunnel_parse_opt,
466 .print_opt = iptunnel_print_opt,
vadimk561e6502014-09-30 08:17:31 +0300467 .print_help = iptunnel_print_help,
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100468};
469
470struct link_util sit_link_util = {
471 .id = "sit",
472 .maxattr = IFLA_IPTUN_MAX,
473 .parse_opt = iptunnel_parse_opt,
474 .print_opt = iptunnel_print_opt,
vadimk561e6502014-09-30 08:17:31 +0300475 .print_help = iptunnel_print_help,
Nicolas Dichtel1ce2de92012-12-12 10:51:47 +0100476};