1 /*
2 * lib/route/link/ipgre.c IPGRE Link Info
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation version 2.1
7 * of the License.
8 *
9 * Copyright (c) 2014 Susant Sahani <susant@redhat.com>
10 */
11
12 /**
13 * @ingroup link
14 * @defgroup ipgre IPGRE
15 * ipgre link module
16 *
17 * @details
18 * \b Link Type Name: "ipgre"
19 *
20 * @route_doc{link_ipgre, IPGRE Documentation}
21 *
22 * @{
23 */
24
25 #include <netlink-private/netlink.h>
26 #include <netlink/netlink.h>
27 #include <netlink/attr.h>
28 #include <netlink/utils.h>
29 #include <netlink/object.h>
30 #include <netlink/route/rtnl.h>
31 #include <netlink-private/route/link/api.h>
32 #include <linux/if_tunnel.h>
33
34 #define IPGRE_ATTR_LINK (1 << 0)
35 #define IPGRE_ATTR_IFLAGS (1 << 1)
36 #define IPGRE_ATTR_OFLAGS (1 << 2)
37 #define IPGRE_ATTR_IKEY (1 << 3)
38 #define IPGRE_ATTR_OKEY (1 << 4)
39 #define IPGRE_ATTR_LOCAL (1 << 5)
40 #define IPGRE_ATTR_REMOTE (1 << 6)
41 #define IPGRE_ATTR_TTL (1 << 7)
42 #define IPGRE_ATTR_TOS (1 << 8)
43 #define IPGRE_ATTR_PMTUDISC (1 << 9)
44
45 struct ipgre_info
46 {
47 uint8_t ttl;
48 uint8_t tos;
49 uint8_t pmtudisc;
50 uint16_t iflags;
51 uint16_t oflags;
52 uint32_t ikey;
53 uint32_t okey;
54 uint32_t link;
55 uint32_t local;
56 uint32_t remote;
57 uint32_t ipgre_mask;
58 };
59
60 static struct nla_policy ipgre_policy[IFLA_GRE_MAX + 1] = {
61 [IFLA_GRE_LINK] = { .type = NLA_U32 },
62 [IFLA_GRE_IFLAGS] = { .type = NLA_U16 },
63 [IFLA_GRE_OFLAGS] = { .type = NLA_U16 },
64 [IFLA_GRE_IKEY] = { .type = NLA_U32 },
65 [IFLA_GRE_OKEY] = { .type = NLA_U32 },
66 [IFLA_GRE_LOCAL] = { .type = NLA_U32 },
67 [IFLA_GRE_REMOTE] = { .type = NLA_U32 },
68 [IFLA_GRE_TTL] = { .type = NLA_U8 },
69 [IFLA_GRE_TOS] = { .type = NLA_U8 },
70 [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
71 };
72
ipgre_alloc(struct rtnl_link * link)73 static int ipgre_alloc(struct rtnl_link *link)
74 {
75 struct ipgre_info *ipgre;
76
77 ipgre = calloc(1, sizeof(*ipgre));
78 if (!ipgre)
79 return -NLE_NOMEM;
80
81 link->l_info = ipgre;
82
83 return 0;
84 }
85
ipgre_parse(struct rtnl_link * link,struct nlattr * data,struct nlattr * xstats)86 static int ipgre_parse(struct rtnl_link *link, struct nlattr *data,
87 struct nlattr *xstats)
88 {
89 struct nlattr *tb[IFLA_IPTUN_MAX + 1];
90 struct ipgre_info *ipgre;
91 int err;
92
93 NL_DBG(3, "Parsing IPGRE link info");
94
95 err = nla_parse_nested(tb, IFLA_GRE_MAX, data, ipgre_policy);
96 if (err < 0)
97 goto errout;
98
99 err = ipgre_alloc(link);
100 if (err < 0)
101 goto errout;
102
103 ipgre = link->l_info;
104
105 if (tb[IFLA_GRE_LINK]) {
106 ipgre->link = nla_get_u32(tb[IFLA_GRE_LINK]);
107 ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
108 }
109
110 if (tb[IFLA_GRE_IFLAGS]) {
111 ipgre->iflags = nla_get_u16(tb[IFLA_GRE_IFLAGS]);
112 ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
113 }
114
115 if (tb[IFLA_GRE_OFLAGS]) {
116 ipgre->oflags = nla_get_u16(tb[IFLA_GRE_OFLAGS]);
117 ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
118 }
119
120 if (tb[IFLA_GRE_IKEY]) {
121 ipgre->ikey = nla_get_u32(tb[IFLA_GRE_IKEY]);
122 ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
123 }
124
125 if (tb[IFLA_GRE_OKEY]) {
126 ipgre->okey = nla_get_u32(tb[IFLA_GRE_OKEY]);
127 ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
128 }
129
130 if (tb[IFLA_GRE_LOCAL]) {
131 ipgre->local = nla_get_u32(tb[IFLA_GRE_LOCAL]);
132 ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
133 }
134
135 if (tb[IFLA_GRE_LOCAL]) {
136 ipgre->remote = nla_get_u32(tb[IFLA_GRE_LOCAL]);
137 ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
138 }
139
140 if (tb[IFLA_GRE_TTL]) {
141 ipgre->ttl = nla_get_u8(tb[IFLA_GRE_TTL]);
142 ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
143 }
144
145 if (tb[IFLA_GRE_TOS]) {
146 ipgre->tos = nla_get_u8(tb[IFLA_GRE_TOS]);
147 ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
148 }
149
150 if (tb[IFLA_GRE_PMTUDISC]) {
151 ipgre->pmtudisc = nla_get_u8(tb[IFLA_GRE_PMTUDISC]);
152 ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
153 }
154
155 err = 0;
156
157 errout:
158 return err;
159 }
160
ipgre_put_attrs(struct nl_msg * msg,struct rtnl_link * link)161 static int ipgre_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
162 {
163 struct ipgre_info *ipgre = link->l_info;
164 struct nlattr *data;
165
166 data = nla_nest_start(msg, IFLA_INFO_DATA);
167 if (!data)
168 return -NLE_MSGSIZE;
169
170 if (ipgre->ipgre_mask & IPGRE_ATTR_LINK)
171 NLA_PUT_U32(msg, IFLA_GRE_LINK, ipgre->link);
172
173 if (ipgre->ipgre_mask & IFLA_GRE_IFLAGS)
174 NLA_PUT_U16(msg, IFLA_GRE_IFLAGS, ipgre->iflags);
175
176 if (ipgre->ipgre_mask & IFLA_GRE_OFLAGS)
177 NLA_PUT_U16(msg, IFLA_GRE_OFLAGS, ipgre->oflags);
178
179 if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY)
180 NLA_PUT_U32(msg, IFLA_GRE_IKEY, ipgre->ikey);
181
182 if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY)
183 NLA_PUT_U32(msg, IFLA_GRE_OKEY, ipgre->okey);
184
185 if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL)
186 NLA_PUT_U32(msg, IFLA_GRE_LOCAL, ipgre->local);
187
188 if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE)
189 NLA_PUT_U32(msg, IFLA_GRE_REMOTE, ipgre->remote);
190
191 if (ipgre->ipgre_mask & IPGRE_ATTR_TTL)
192 NLA_PUT_U8(msg, IFLA_GRE_TTL, ipgre->ttl);
193
194 if (ipgre->ipgre_mask & IPGRE_ATTR_TOS)
195 NLA_PUT_U8(msg, IFLA_GRE_TOS, ipgre->tos);
196
197 if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC)
198 NLA_PUT_U8(msg, IFLA_GRE_PMTUDISC, ipgre->pmtudisc);
199
200 nla_nest_end(msg, data);
201
202 nla_put_failure:
203
204 return 0;
205 }
206
ipgre_free(struct rtnl_link * link)207 static void ipgre_free(struct rtnl_link *link)
208 {
209 struct ipgre_info *ipgre = link->l_info;
210
211 free(ipgre);
212 link->l_info = NULL;
213 }
214
ipgre_dump_line(struct rtnl_link * link,struct nl_dump_params * p)215 static void ipgre_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
216 {
217 nl_dump(p, "ipgre : %s", link->l_name);
218 }
219
ipgre_dump_details(struct rtnl_link * link,struct nl_dump_params * p)220 static void ipgre_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
221 {
222 struct ipgre_info *ipgre = link->l_info;
223 char *name, addr[INET_ADDRSTRLEN];
224
225 if (ipgre->ipgre_mask & IPGRE_ATTR_LINK) {
226 nl_dump(p, " link ");
227 name = rtnl_link_get_name(link);
228 if (name)
229 nl_dump_line(p, "%s\n", name);
230 else
231 nl_dump_line(p, "%u\n", ipgre->link);
232 }
233
234 if (ipgre->ipgre_mask & IPGRE_ATTR_IFLAGS) {
235 nl_dump(p, " iflags ");
236 nl_dump_line(p, "%x\n", ipgre->iflags);
237 }
238
239 if (ipgre->ipgre_mask & IPGRE_ATTR_OFLAGS) {
240 nl_dump(p, " oflags ");
241 nl_dump_line(p, "%x\n", ipgre->oflags);
242 }
243
244 if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY) {
245 nl_dump(p, " ikey ");
246 nl_dump_line(p, "%x\n",ipgre->ikey);
247 }
248
249 if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY) {
250 nl_dump(p, " okey ");
251 nl_dump_line(p, "%x\n", ipgre->okey);
252 }
253
254 if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL) {
255 nl_dump(p, " local ");
256 if(inet_ntop(AF_INET, &ipgre->local, addr, sizeof(addr)))
257 nl_dump_line(p, "%s\n", addr);
258 else
259 nl_dump_line(p, "%#x\n", ntohs(ipgre->local));
260 }
261
262 if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE) {
263 nl_dump(p, " remote ");
264 if(inet_ntop(AF_INET, &ipgre->remote, addr, sizeof(addr)))
265 nl_dump_line(p, "%s\n", addr);
266 else
267 nl_dump_line(p, "%#x\n", ntohs(ipgre->remote));
268 }
269
270 if (ipgre->ipgre_mask & IPGRE_ATTR_TTL) {
271 nl_dump(p, " ttl ");
272 nl_dump_line(p, "%u\n", ipgre->ttl);
273 }
274
275 if (ipgre->ipgre_mask & IPGRE_ATTR_TOS) {
276 nl_dump(p, " tos ");
277 nl_dump_line(p, "%u\n", ipgre->tos);
278 }
279
280 if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC) {
281 nl_dump(p, " pmtudisc ");
282 nl_dump_line(p, "enabled (%#x)\n", ipgre->pmtudisc);
283 }
284 }
285
ipgre_clone(struct rtnl_link * dst,struct rtnl_link * src)286 static int ipgre_clone(struct rtnl_link *dst, struct rtnl_link *src)
287 {
288 struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
289 int err;
290
291 dst->l_info = NULL;
292
293 err = rtnl_link_set_type(dst, "gre");
294 if (err < 0)
295 return err;
296
297 ipgre_dst = dst->l_info;
298
299 if (!ipgre_dst || !ipgre_src)
300 BUG();
301
302 memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
303
304 return 0;
305 }
306
307 static struct rtnl_link_info_ops ipgre_info_ops = {
308 .io_name = "gre",
309 .io_alloc = ipgre_alloc,
310 .io_parse = ipgre_parse,
311 .io_dump = {
312 [NL_DUMP_LINE] = ipgre_dump_line,
313 [NL_DUMP_DETAILS] = ipgre_dump_details,
314 },
315 .io_clone = ipgre_clone,
316 .io_put_attrs = ipgre_put_attrs,
317 .io_free = ipgre_free,
318 };
319
320 #define IS_IPGRE_LINK_ASSERT(link) \
321 if ((link)->l_info_ops != &ipgre_info_ops) { \
322 APPBUG("Link is not a ipgre link. set type \"gre\" first.");\
323 return -NLE_OPNOTSUPP; \
324 }
325
rtnl_link_ipgre_alloc(void)326 struct rtnl_link *rtnl_link_ipgre_alloc(void)
327 {
328 struct rtnl_link *link;
329 int err;
330
331 link = rtnl_link_alloc();
332 if (!link)
333 return NULL;
334
335 err = rtnl_link_set_type(link, "gre");
336 if (err < 0) {
337 rtnl_link_put(link);
338 return NULL;
339 }
340
341 return link;
342 }
343
344 /**
345 * Check if link is a IPGRE link
346 * @arg link Link object
347 *
348 * @return True if link is a IPGRE link, otherwise 0 is returned.
349 */
rtnl_link_is_ipgre(struct rtnl_link * link)350 int rtnl_link_is_ipgre(struct rtnl_link *link)
351 {
352 return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gre");
353 }
354 /**
355 * Create a new ipip tunnel device
356 * @arg sock netlink socket
357 * @arg name name of the tunnel deviceL
358 *
359 * Creates a new ipip tunnel device in the kernel
360 * @return 0 on success or a negative error code
361 */
rtnl_link_ipgre_add(struct nl_sock * sk,const char * name)362 int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
363 {
364 struct rtnl_link *link;
365 int err;
366
367 link = rtnl_link_ipgre_alloc();
368 if (!link)
369 return -NLE_NOMEM;
370
371 if(name)
372 rtnl_link_set_name(link, name);
373
374 err = rtnl_link_add(sk, link, NLM_F_CREATE);
375 rtnl_link_put(link);
376
377 return err;
378 }
379 /**
380 * Set IPGRE tunnel interface index
381 * @arg link Link object
382 * @arg index interface index
383 *
384 * @return 0 on success or a negative error code
385 */
rtnl_link_ipgre_set_link(struct rtnl_link * link,uint32_t index)386 int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
387 {
388 struct ipgre_info *ipgre = link->l_info;
389
390 IS_IPGRE_LINK_ASSERT(link);
391
392 ipgre->link = index;
393 ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
394
395 return 0;
396 }
397
398 /**
399 * Get IPGRE tunnel interface index
400 * @arg link Link object
401 *
402 * @return interface index
403 */
rtnl_link_ipgre_get_link(struct rtnl_link * link)404 uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
405 {
406 struct ipgre_info *ipgre = link->l_info;
407
408 IS_IPGRE_LINK_ASSERT(link);
409
410 return ipgre->link;
411 }
412
413 /**
414 * Set IPGRE tunnel set iflags
415 * @arg link Link object
416 * @arg iflags gre iflags
417 *
418 * @return 0 on success or a negative error code
419 */
rtnl_link_ipgre_set_iflags(struct rtnl_link * link,uint16_t iflags)420 int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
421 {
422 struct ipgre_info *ipgre = link->l_info;
423
424 IS_IPGRE_LINK_ASSERT(link);
425
426 ipgre->iflags = iflags;
427 ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
428
429 return 0;
430 }
431
432 /**
433 * Get IPGRE tunnel iflags
434 * @arg link Link object
435 *
436 * @return iflags
437 */
rtnl_link_ipgre_get_iflags(struct rtnl_link * link)438 uint16_t rtnl_link_ipgre_get_iflags(struct rtnl_link *link)
439 {
440 struct ipgre_info *ipgre = link->l_info;
441
442 IS_IPGRE_LINK_ASSERT(link);
443
444 return ipgre->iflags;
445 }
446
447 /**
448 * Set IPGRE tunnel set oflags
449 * @arg link Link object
450 * @arg iflags gre oflags
451 *
452 * @return 0 on success or a negative error code
453 */
rtnl_link_ipgre_set_oflags(struct rtnl_link * link,uint16_t oflags)454 int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
455 {
456 struct ipgre_info *ipgre = link->l_info;
457
458 IS_IPGRE_LINK_ASSERT(link);
459
460 ipgre->oflags = oflags;
461 ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
462
463 return 0;
464 }
465
466 /**
467 * Get IPGRE tunnel oflags
468 * @arg link Link object
469 *
470 * @return oflags
471 */
rtnl_link_ipgre_get_oflags(struct rtnl_link * link)472 uint16_t rtnl_link_ipgre_get_oflags(struct rtnl_link *link)
473 {
474 struct ipgre_info *ipgre = link->l_info;
475
476 IS_IPGRE_LINK_ASSERT(link);
477
478 return ipgre->oflags;
479 }
480
481 /**
482 * Set IPGRE tunnel set ikey
483 * @arg link Link object
484 * @arg ikey gre ikey
485 *
486 * @return 0 on success or a negative error code
487 */
rtnl_link_ipgre_set_ikey(struct rtnl_link * link,uint32_t ikey)488 int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
489 {
490 struct ipgre_info *ipgre = link->l_info;
491
492 IS_IPGRE_LINK_ASSERT(link);
493
494 ipgre->ikey = ikey;
495 ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
496
497 return 0;
498 }
499
500 /**
501 * Get IPGRE tunnel ikey
502 * @arg link Link object
503 *
504 * @return ikey
505 */
rtnl_link_ipgre_get_ikey(struct rtnl_link * link)506 uint32_t rtnl_link_ipgre_get_ikey(struct rtnl_link *link)
507 {
508 struct ipgre_info *ipgre = link->l_info;
509
510 IS_IPGRE_LINK_ASSERT(link);
511
512 return ipgre->ikey;
513 }
514
515 /**
516 * Set IPGRE tunnel set okey
517 * @arg link Link object
518 * @arg okey gre okey
519 *
520 * @return 0 on success or a negative error code
521 */
rtnl_link_ipgre_set_okey(struct rtnl_link * link,uint32_t okey)522 int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
523 {
524 struct ipgre_info *ipgre = link->l_info;
525
526 IS_IPGRE_LINK_ASSERT(link);
527
528 ipgre->okey = okey;
529 ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
530
531 return 0;
532 }
533
534 /**
535 * Get IPGRE tunnel okey
536 * @arg link Link object
537 *
538 * @return okey value
539 */
rtnl_link_ipgre_get_okey(struct rtnl_link * link)540 uint32_t rtnl_link_ipgre_get_okey(struct rtnl_link *link)
541 {
542 struct ipgre_info *ipgre = link->l_info;
543
544 IS_IPGRE_LINK_ASSERT(link);
545
546 return ipgre->okey;
547 }
548
549 /**
550 * Set IPGRE tunnel local address
551 * @arg link Link object
552 * @arg addr local address
553 *
554 * @return 0 on success or a negative error code
555 */
rtnl_link_ipgre_set_local(struct rtnl_link * link,uint32_t addr)556 int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
557 {
558 struct ipgre_info *ipgre = link->l_info;
559
560 IS_IPGRE_LINK_ASSERT(link);
561
562 ipgre->local = addr;
563 ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
564
565 return 0;
566 }
567
568 /**
569 * Get IPGRE tunnel local address
570 * @arg link Link object
571 *
572 * @return local address
573 */
rtnl_link_ipgre_get_local(struct rtnl_link * link)574 uint32_t rtnl_link_ipgre_get_local(struct rtnl_link *link)
575 {
576 struct ipgre_info *ipgre = link->l_info;
577
578 IS_IPGRE_LINK_ASSERT(link);
579
580 return ipgre->local;
581 }
582
583 /**
584 * Set IPGRE tunnel remote address
585 * @arg link Link object
586 * @arg remote remote address
587 *
588 * @return 0 on success or a negative error code
589 */
rtnl_link_ipgre_set_remote(struct rtnl_link * link,uint32_t remote)590 int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
591 {
592 struct ipgre_info *ipgre = link->l_info;
593
594 IS_IPGRE_LINK_ASSERT(link);
595
596 ipgre->remote = remote;
597 ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
598
599 return 0;
600 }
601
602 /**
603 * Get IPGRE tunnel remote address
604 * @arg link Link object
605 *
606 * @return remote address on success or a negative error code
607 */
rtnl_link_ipgre_get_remote(struct rtnl_link * link)608 uint32_t rtnl_link_ipgre_get_remote(struct rtnl_link *link)
609 {
610 struct ipgre_info *ipgre = link->l_info;
611
612 IS_IPGRE_LINK_ASSERT(link);
613
614 return ipgre->remote;
615 }
616
617 /**
618 * Set IPGRE tunnel ttl
619 * @arg link Link object
620 * @arg ttl tunnel ttl
621 *
622 * @return 0 on success or a negative error code
623 */
rtnl_link_ipgre_set_ttl(struct rtnl_link * link,uint8_t ttl)624 int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
625 {
626 struct ipgre_info *ipgre = link->l_info;
627
628 IS_IPGRE_LINK_ASSERT(link);
629
630 ipgre->ttl = ttl;
631 ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
632
633 return 0;
634 }
635
636 /**
637 * Set IPGRE tunnel ttl
638 * @arg link Link object
639 *
640 * @return ttl value
641 */
rtnl_link_ipgre_get_ttl(struct rtnl_link * link)642 uint8_t rtnl_link_ipgre_get_ttl(struct rtnl_link *link)
643 {
644 struct ipgre_info *ipgre = link->l_info;
645
646 IS_IPGRE_LINK_ASSERT(link);
647
648 return ipgre->ttl;
649 }
650
651 /**
652 * Set IPGRE tunnel tos
653 * @arg link Link object
654 * @arg tos tunnel tos
655 *
656 * @return 0 on success or a negative error code
657 */
rtnl_link_ipgre_set_tos(struct rtnl_link * link,uint8_t tos)658 int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
659 {
660 struct ipgre_info *ipgre = link->l_info;
661
662 IS_IPGRE_LINK_ASSERT(link);
663
664 ipgre->tos = tos;
665 ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
666
667 return 0;
668 }
669
670 /**
671 * Get IPGRE tunnel tos
672 * @arg link Link object
673 *
674 * @return tos value
675 */
rtnl_link_ipgre_get_tos(struct rtnl_link * link)676 uint8_t rtnl_link_ipgre_get_tos(struct rtnl_link *link)
677 {
678 struct ipgre_info *ipgre = link->l_info;
679
680 IS_IPGRE_LINK_ASSERT(link);
681
682 return ipgre->tos;
683 }
684
685 /**
686 * Set IPGRE tunnel path MTU discovery
687 * @arg link Link object
688 * @arg pmtudisc path MTU discovery
689 *
690 * @return 0 on success or a negative error code
691 */
rtnl_link_ipgre_set_pmtudisc(struct rtnl_link * link,uint8_t pmtudisc)692 int rtnl_link_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
693 {
694 struct ipgre_info *ipgre = link->l_info;
695
696 IS_IPGRE_LINK_ASSERT(link);
697
698 ipgre->pmtudisc = pmtudisc;
699 ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
700
701 return 0;
702 }
703
704 /**
705 * Get IPGRE path MTU discovery
706 * @arg link Link object
707 *
708 * @return pmtudisc value
709 */
rtnl_link_get_pmtudisc(struct rtnl_link * link)710 uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link)
711 {
712 struct ipgre_info *ipgre = link->l_info;
713
714 IS_IPGRE_LINK_ASSERT(link);
715
716 return ipgre->pmtudisc;
717 }
718
ipgre_init(void)719 static void __init ipgre_init(void)
720 {
721 rtnl_link_register_info(&ipgre_info_ops);
722 }
723
ipgre_exit(void)724 static void __exit ipgre_exit(void)
725 {
726 rtnl_link_unregister_info(&ipgre_info_ops);
727 }
728