1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * Copyright (c) 2014 Susant Sahani <[email protected]>
4 */
5
6 /**
7 * @ingroup link
8 * @defgroup ipgre IPGRE
9 * ipgre link module
10 *
11 * @details
12 * \b Link Type Name: "ipgre"
13 *
14 * @route_doc{link_ipgre, IPGRE Documentation}
15 *
16 * @{
17 */
18
19 #include "nl-default.h"
20
21 #include <linux/if_tunnel.h>
22
23 #include <netlink/netlink.h>
24 #include <netlink/attr.h>
25 #include <netlink/utils.h>
26 #include <netlink/object.h>
27 #include <netlink/route/rtnl.h>
28 #include <netlink/route/link/ipgre.h>
29
30 #include "nl-route.h"
31 #include "link-api.h"
32
33 #define IPGRE_ATTR_LINK (1 << 0)
34 #define IPGRE_ATTR_IFLAGS (1 << 1)
35 #define IPGRE_ATTR_OFLAGS (1 << 2)
36 #define IPGRE_ATTR_IKEY (1 << 3)
37 #define IPGRE_ATTR_OKEY (1 << 4)
38 #define IPGRE_ATTR_LOCAL (1 << 5)
39 #define IPGRE_ATTR_REMOTE (1 << 6)
40 #define IPGRE_ATTR_TTL (1 << 7)
41 #define IPGRE_ATTR_TOS (1 << 8)
42 #define IPGRE_ATTR_PMTUDISC (1 << 9)
43 #define IPGRE_ATTR_FWMARK (1 << 10)
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 fwmark;
58 uint32_t ipgre_mask;
59 };
60
61 static struct nla_policy ipgre_policy[IFLA_GRE_MAX + 1] = {
62 [IFLA_GRE_LINK] = { .type = NLA_U32 },
63 [IFLA_GRE_IFLAGS] = { .type = NLA_U16 },
64 [IFLA_GRE_OFLAGS] = { .type = NLA_U16 },
65 [IFLA_GRE_IKEY] = { .type = NLA_U32 },
66 [IFLA_GRE_OKEY] = { .type = NLA_U32 },
67 [IFLA_GRE_LOCAL] = { .type = NLA_U32 },
68 [IFLA_GRE_REMOTE] = { .type = NLA_U32 },
69 [IFLA_GRE_TTL] = { .type = NLA_U8 },
70 [IFLA_GRE_TOS] = { .type = NLA_U8 },
71 [IFLA_GRE_PMTUDISC] = { .type = NLA_U8 },
72 [IFLA_GRE_FWMARK] = { .type = NLA_U32 },
73 };
74
ipgre_alloc(struct rtnl_link * link)75 static int ipgre_alloc(struct rtnl_link *link)
76 {
77 struct ipgre_info *ipgre;
78
79 if (link->l_info)
80 memset(link->l_info, 0, sizeof(*ipgre));
81 else {
82 ipgre = calloc(1, sizeof(*ipgre));
83 if (!ipgre)
84 return -NLE_NOMEM;
85
86 link->l_info = ipgre;
87 }
88
89 return 0;
90 }
91
ipgre_parse(struct rtnl_link * link,struct nlattr * data,struct nlattr * xstats)92 static int ipgre_parse(struct rtnl_link *link, struct nlattr *data,
93 struct nlattr *xstats)
94 {
95 struct nlattr *tb[IFLA_GRE_MAX + 1];
96 struct ipgre_info *ipgre;
97 int err;
98
99 NL_DBG(3, "Parsing IPGRE link info\n");
100
101 err = nla_parse_nested(tb, IFLA_GRE_MAX, data, ipgre_policy);
102 if (err < 0)
103 goto errout;
104
105 err = ipgre_alloc(link);
106 if (err < 0)
107 goto errout;
108
109 ipgre = link->l_info;
110
111 if (tb[IFLA_GRE_LINK]) {
112 ipgre->link = nla_get_u32(tb[IFLA_GRE_LINK]);
113 ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
114 }
115
116 if (tb[IFLA_GRE_IFLAGS]) {
117 ipgre->iflags = nla_get_u16(tb[IFLA_GRE_IFLAGS]);
118 ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
119 }
120
121 if (tb[IFLA_GRE_OFLAGS]) {
122 ipgre->oflags = nla_get_u16(tb[IFLA_GRE_OFLAGS]);
123 ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
124 }
125
126 if (tb[IFLA_GRE_IKEY]) {
127 ipgre->ikey = nla_get_u32(tb[IFLA_GRE_IKEY]);
128 ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
129 }
130
131 if (tb[IFLA_GRE_OKEY]) {
132 ipgre->okey = nla_get_u32(tb[IFLA_GRE_OKEY]);
133 ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
134 }
135
136 if (tb[IFLA_GRE_LOCAL]) {
137 ipgre->local = nla_get_u32(tb[IFLA_GRE_LOCAL]);
138 ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
139 }
140
141 if (tb[IFLA_GRE_REMOTE]) {
142 ipgre->remote = nla_get_u32(tb[IFLA_GRE_REMOTE]);
143 ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
144 }
145
146 if (tb[IFLA_GRE_TTL]) {
147 ipgre->ttl = nla_get_u8(tb[IFLA_GRE_TTL]);
148 ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
149 }
150
151 if (tb[IFLA_GRE_TOS]) {
152 ipgre->tos = nla_get_u8(tb[IFLA_GRE_TOS]);
153 ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
154 }
155
156 if (tb[IFLA_GRE_PMTUDISC]) {
157 ipgre->pmtudisc = nla_get_u8(tb[IFLA_GRE_PMTUDISC]);
158 ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
159 }
160
161 if (tb[IFLA_GRE_FWMARK]) {
162 ipgre->fwmark = nla_get_u32(tb[IFLA_GRE_FWMARK]);
163 ipgre->ipgre_mask |= IPGRE_ATTR_FWMARK;
164 }
165
166 err = 0;
167
168 errout:
169 return err;
170 }
171
ipgre_put_attrs(struct nl_msg * msg,struct rtnl_link * link)172 static int ipgre_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
173 {
174 struct ipgre_info *ipgre = link->l_info;
175 struct nlattr *data;
176
177 data = nla_nest_start(msg, IFLA_INFO_DATA);
178 if (!data)
179 return -NLE_MSGSIZE;
180
181 if (ipgre->ipgre_mask & IPGRE_ATTR_LINK)
182 NLA_PUT_U32(msg, IFLA_GRE_LINK, ipgre->link);
183
184 if (ipgre->ipgre_mask & IFLA_GRE_IFLAGS)
185 NLA_PUT_U16(msg, IFLA_GRE_IFLAGS, ipgre->iflags);
186
187 if (ipgre->ipgre_mask & IFLA_GRE_OFLAGS)
188 NLA_PUT_U16(msg, IFLA_GRE_OFLAGS, ipgre->oflags);
189
190 if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY)
191 NLA_PUT_U32(msg, IFLA_GRE_IKEY, ipgre->ikey);
192
193 if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY)
194 NLA_PUT_U32(msg, IFLA_GRE_OKEY, ipgre->okey);
195
196 if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL)
197 NLA_PUT_U32(msg, IFLA_GRE_LOCAL, ipgre->local);
198
199 if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE)
200 NLA_PUT_U32(msg, IFLA_GRE_REMOTE, ipgre->remote);
201
202 if (ipgre->ipgre_mask & IPGRE_ATTR_TTL)
203 NLA_PUT_U8(msg, IFLA_GRE_TTL, ipgre->ttl);
204
205 if (ipgre->ipgre_mask & IPGRE_ATTR_TOS)
206 NLA_PUT_U8(msg, IFLA_GRE_TOS, ipgre->tos);
207
208 if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC)
209 NLA_PUT_U8(msg, IFLA_GRE_PMTUDISC, ipgre->pmtudisc);
210
211 if (ipgre->ipgre_mask & IPGRE_ATTR_FWMARK)
212 NLA_PUT_U32(msg, IFLA_GRE_FWMARK, ipgre->fwmark);
213
214 nla_nest_end(msg, data);
215
216 nla_put_failure:
217
218 return 0;
219 }
220
ipgre_free(struct rtnl_link * link)221 static void ipgre_free(struct rtnl_link *link)
222 {
223 struct ipgre_info *ipgre = link->l_info;
224
225 free(ipgre);
226 link->l_info = NULL;
227 }
228
ipgre_dump_line(struct rtnl_link * link,struct nl_dump_params * p)229 static void ipgre_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
230 {
231 nl_dump(p, "ipgre : %s", link->l_name);
232 }
233
ipgre_dump_details(struct rtnl_link * link,struct nl_dump_params * p)234 static void ipgre_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
235 {
236 struct ipgre_info *ipgre = link->l_info;
237 char *name, addr[INET_ADDRSTRLEN];
238 struct rtnl_link *parent;
239
240 if (ipgre->ipgre_mask & IPGRE_ATTR_LINK) {
241 nl_dump(p, " link ");
242
243 name = NULL;
244 parent = link_lookup(link->ce_cache, ipgre->link);
245 if (parent)
246 name = rtnl_link_get_name(parent);
247
248 if (name)
249 nl_dump_line(p, "%s\n", name);
250 else
251 nl_dump_line(p, "%u\n", ipgre->link);
252 }
253
254 if (ipgre->ipgre_mask & IPGRE_ATTR_IFLAGS) {
255 nl_dump(p, " iflags ");
256 nl_dump_line(p, "%x\n", ipgre->iflags);
257 }
258
259 if (ipgre->ipgre_mask & IPGRE_ATTR_OFLAGS) {
260 nl_dump(p, " oflags ");
261 nl_dump_line(p, "%x\n", ipgre->oflags);
262 }
263
264 if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY) {
265 nl_dump(p, " ikey ");
266 nl_dump_line(p, "%x\n",ipgre->ikey);
267 }
268
269 if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY) {
270 nl_dump(p, " okey ");
271 nl_dump_line(p, "%x\n", ipgre->okey);
272 }
273
274 if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL) {
275 nl_dump(p, " local ");
276 if(inet_ntop(AF_INET, &ipgre->local, addr, sizeof(addr)))
277 nl_dump_line(p, "%s\n", addr);
278 else
279 nl_dump_line(p, "%#x\n", ntohs(ipgre->local));
280 }
281
282 if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE) {
283 nl_dump(p, " remote ");
284 if(inet_ntop(AF_INET, &ipgre->remote, addr, sizeof(addr)))
285 nl_dump_line(p, "%s\n", addr);
286 else
287 nl_dump_line(p, "%#x\n", ntohs(ipgre->remote));
288 }
289
290 if (ipgre->ipgre_mask & IPGRE_ATTR_TTL) {
291 nl_dump(p, " ttl ");
292 nl_dump_line(p, "%u\n", ipgre->ttl);
293 }
294
295 if (ipgre->ipgre_mask & IPGRE_ATTR_TOS) {
296 nl_dump(p, " tos ");
297 nl_dump_line(p, "%u\n", ipgre->tos);
298 }
299
300 if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC) {
301 nl_dump(p, " pmtudisc ");
302 nl_dump_line(p, "enabled (%#x)\n", ipgre->pmtudisc);
303 }
304
305 if (ipgre->ipgre_mask & IPGRE_ATTR_FWMARK) {
306 nl_dump(p, " fwmark ");
307 nl_dump_line(p, "%x\n", ipgre->fwmark);
308 }
309 }
310
ipgre_clone(struct rtnl_link * dst,struct rtnl_link * src)311 static int ipgre_clone(struct rtnl_link *dst, struct rtnl_link *src)
312 {
313 struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
314 int err;
315
316 dst->l_info = NULL;
317
318 err = rtnl_link_set_type(dst, "gre");
319 if (err < 0)
320 return err;
321
322 ipgre_dst = dst->l_info;
323
324 if (!ipgre_dst || !ipgre_src)
325 BUG();
326
327 memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
328
329 return 0;
330 }
331
ipgretap_clone(struct rtnl_link * dst,struct rtnl_link * src)332 static int ipgretap_clone(struct rtnl_link *dst, struct rtnl_link *src)
333 {
334 struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
335 int err;
336
337 dst->l_info = NULL;
338
339 err = rtnl_link_set_type(dst, "gretap");
340 if (err < 0)
341 return err;
342
343 ipgre_dst = dst->l_info;
344
345 if (!ipgre_dst || !ipgre_src)
346 BUG();
347
348 memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
349
350 return 0;
351 }
352
353 static struct rtnl_link_info_ops ipgre_info_ops = {
354 .io_name = "gre",
355 .io_alloc = ipgre_alloc,
356 .io_parse = ipgre_parse,
357 .io_dump = {
358 [NL_DUMP_LINE] = ipgre_dump_line,
359 [NL_DUMP_DETAILS] = ipgre_dump_details,
360 },
361 .io_clone = ipgre_clone,
362 .io_put_attrs = ipgre_put_attrs,
363 .io_free = ipgre_free,
364 };
365
366 static struct rtnl_link_info_ops ipgretap_info_ops = {
367 .io_name = "gretap",
368 .io_alloc = ipgre_alloc,
369 .io_parse = ipgre_parse,
370 .io_dump = {
371 [NL_DUMP_LINE] = ipgre_dump_line,
372 [NL_DUMP_DETAILS] = ipgre_dump_details,
373 },
374 .io_clone = ipgretap_clone,
375 .io_put_attrs = ipgre_put_attrs,
376 .io_free = ipgre_free,
377 };
378
379 #define IS_IPGRE_LINK_ASSERT(link) \
380 if ((link)->l_info_ops != &ipgre_info_ops && \
381 (link)->l_info_ops != &ipgretap_info_ops) { \
382 APPBUG("Link is not a ipgre link. set type \"gre/gretap\" first.");\
383 return -NLE_OPNOTSUPP; \
384 }
385
rtnl_link_ipgre_alloc(void)386 struct rtnl_link *rtnl_link_ipgre_alloc(void)
387 {
388 struct rtnl_link *link;
389 int err;
390
391 link = rtnl_link_alloc();
392 if (!link)
393 return NULL;
394
395 err = rtnl_link_set_type(link, "gre");
396 if (err < 0) {
397 rtnl_link_put(link);
398 return NULL;
399 }
400
401 return link;
402 }
403
404 /**
405 * Check if link is a IPGRE link
406 * @arg link Link object
407 *
408 * @return True if link is a IPGRE link, otherwise 0 is returned.
409 */
rtnl_link_is_ipgre(struct rtnl_link * link)410 int rtnl_link_is_ipgre(struct rtnl_link *link)
411 {
412 return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gre");
413 }
414
415 /**
416 * Create a new IPGRE tunnel device
417 * @arg sock netlink socket
418 * @arg name name of the tunnel deviceL
419 *
420 * Creates a new ipip tunnel device in the kernel
421 * @return 0 on success or a negative error code
422 */
rtnl_link_ipgre_add(struct nl_sock * sk,const char * name)423 int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
424 {
425 struct rtnl_link *link;
426 int err;
427
428 link = rtnl_link_ipgre_alloc();
429 if (!link)
430 return -NLE_NOMEM;
431
432 if(name)
433 rtnl_link_set_name(link, name);
434
435 err = rtnl_link_add(sk, link, NLM_F_CREATE);
436 rtnl_link_put(link);
437
438 return err;
439 }
440
rtnl_link_ipgretap_alloc(void)441 struct rtnl_link *rtnl_link_ipgretap_alloc(void)
442 {
443 struct rtnl_link *link;
444 int err;
445
446 link = rtnl_link_alloc();
447 if (!link)
448 return NULL;
449
450 err = rtnl_link_set_type(link, "gretap");
451 if (err < 0) {
452 rtnl_link_put(link);
453 return NULL;
454 }
455
456 return link;
457 }
458
459 /**
460 * Check if link is a IPGRETAP link
461 * @arg link Link object
462 *
463 * @return True if link is a IPGRETAP link, otherwise 0 is returned.
464 */
rtnl_link_is_ipgretap(struct rtnl_link * link)465 int rtnl_link_is_ipgretap(struct rtnl_link *link)
466 {
467 return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gretap");
468 }
469 /**
470 * Create a new IPGRETAP tunnel device
471 * @arg sock netlink socket
472 * @arg name name of the tunnel deviceL
473 *
474 * Creates a new IPGRETAP tunnel device in the kernel
475 * @return 0 on success or a negative error code
476 */
rtnl_link_ipgretap_add(struct nl_sock * sk,const char * name)477 int rtnl_link_ipgretap_add(struct nl_sock *sk, const char *name)
478 {
479 struct rtnl_link *link;
480 int err;
481
482 link = rtnl_link_ipgretap_alloc();
483 if (!link)
484 return -NLE_NOMEM;
485
486 if(name)
487 rtnl_link_set_name(link, name);
488
489 err = rtnl_link_add(sk, link, NLM_F_CREATE);
490 rtnl_link_put(link);
491
492 return err;
493 }
494
495 /**
496 * Set IPGRE tunnel interface index
497 * @arg link Link object
498 * @arg index interface index
499 *
500 * @return 0 on success or a negative error code
501 */
rtnl_link_ipgre_set_link(struct rtnl_link * link,uint32_t index)502 int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
503 {
504 struct ipgre_info *ipgre = link->l_info;
505
506 IS_IPGRE_LINK_ASSERT(link);
507
508 ipgre->link = index;
509 ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
510
511 return 0;
512 }
513
514 /**
515 * Get IPGRE tunnel interface index
516 * @arg link Link object
517 *
518 * @return interface index
519 */
rtnl_link_ipgre_get_link(struct rtnl_link * link)520 uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
521 {
522 struct ipgre_info *ipgre = link->l_info;
523
524 IS_IPGRE_LINK_ASSERT(link);
525
526 return ipgre->link;
527 }
528
529 /**
530 * Set IPGRE tunnel set iflags
531 * @arg link Link object
532 * @arg iflags gre iflags
533 *
534 * @return 0 on success or a negative error code
535 */
rtnl_link_ipgre_set_iflags(struct rtnl_link * link,uint16_t iflags)536 int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
537 {
538 struct ipgre_info *ipgre = link->l_info;
539
540 IS_IPGRE_LINK_ASSERT(link);
541
542 ipgre->iflags = iflags;
543 ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
544
545 return 0;
546 }
547
548 /**
549 * Get IPGRE tunnel iflags
550 * @arg link Link object
551 *
552 * @return iflags
553 */
rtnl_link_ipgre_get_iflags(struct rtnl_link * link)554 uint16_t rtnl_link_ipgre_get_iflags(struct rtnl_link *link)
555 {
556 struct ipgre_info *ipgre = link->l_info;
557
558 IS_IPGRE_LINK_ASSERT(link);
559
560 return ipgre->iflags;
561 }
562
563 /**
564 * Set IPGRE tunnel set oflags
565 * @arg link Link object
566 * @arg iflags gre oflags
567 *
568 * @return 0 on success or a negative error code
569 */
rtnl_link_ipgre_set_oflags(struct rtnl_link * link,uint16_t oflags)570 int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
571 {
572 struct ipgre_info *ipgre = link->l_info;
573
574 IS_IPGRE_LINK_ASSERT(link);
575
576 ipgre->oflags = oflags;
577 ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
578
579 return 0;
580 }
581
582 /**
583 * Get IPGRE tunnel oflags
584 * @arg link Link object
585 *
586 * @return oflags
587 */
rtnl_link_ipgre_get_oflags(struct rtnl_link * link)588 uint16_t rtnl_link_ipgre_get_oflags(struct rtnl_link *link)
589 {
590 struct ipgre_info *ipgre = link->l_info;
591
592 IS_IPGRE_LINK_ASSERT(link);
593
594 return ipgre->oflags;
595 }
596
597 /**
598 * Set IPGRE tunnel set ikey
599 * @arg link Link object
600 * @arg ikey gre ikey
601 *
602 * @return 0 on success or a negative error code
603 */
rtnl_link_ipgre_set_ikey(struct rtnl_link * link,uint32_t ikey)604 int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
605 {
606 struct ipgre_info *ipgre = link->l_info;
607
608 IS_IPGRE_LINK_ASSERT(link);
609
610 ipgre->ikey = ikey;
611 ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
612
613 return 0;
614 }
615
616 /**
617 * Get IPGRE tunnel ikey
618 * @arg link Link object
619 *
620 * @return ikey
621 */
rtnl_link_ipgre_get_ikey(struct rtnl_link * link)622 uint32_t rtnl_link_ipgre_get_ikey(struct rtnl_link *link)
623 {
624 struct ipgre_info *ipgre = link->l_info;
625
626 IS_IPGRE_LINK_ASSERT(link);
627
628 return ipgre->ikey;
629 }
630
631 /**
632 * Set IPGRE tunnel set okey
633 * @arg link Link object
634 * @arg okey gre okey
635 *
636 * @return 0 on success or a negative error code
637 */
rtnl_link_ipgre_set_okey(struct rtnl_link * link,uint32_t okey)638 int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
639 {
640 struct ipgre_info *ipgre = link->l_info;
641
642 IS_IPGRE_LINK_ASSERT(link);
643
644 ipgre->okey = okey;
645 ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
646
647 return 0;
648 }
649
650 /**
651 * Get IPGRE tunnel okey
652 * @arg link Link object
653 *
654 * @return okey value
655 */
rtnl_link_ipgre_get_okey(struct rtnl_link * link)656 uint32_t rtnl_link_ipgre_get_okey(struct rtnl_link *link)
657 {
658 struct ipgre_info *ipgre = link->l_info;
659
660 IS_IPGRE_LINK_ASSERT(link);
661
662 return ipgre->okey;
663 }
664
665 /**
666 * Set IPGRE tunnel local address
667 * @arg link Link object
668 * @arg addr local address
669 *
670 * @return 0 on success or a negative error code
671 */
rtnl_link_ipgre_set_local(struct rtnl_link * link,uint32_t addr)672 int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
673 {
674 struct ipgre_info *ipgre = link->l_info;
675
676 IS_IPGRE_LINK_ASSERT(link);
677
678 ipgre->local = addr;
679 ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
680
681 return 0;
682 }
683
684 /**
685 * Get IPGRE tunnel local address
686 * @arg link Link object
687 *
688 * @return local address
689 */
rtnl_link_ipgre_get_local(struct rtnl_link * link)690 uint32_t rtnl_link_ipgre_get_local(struct rtnl_link *link)
691 {
692 struct ipgre_info *ipgre = link->l_info;
693
694 IS_IPGRE_LINK_ASSERT(link);
695
696 return ipgre->local;
697 }
698
699 /**
700 * Set IPGRE tunnel remote address
701 * @arg link Link object
702 * @arg remote remote address
703 *
704 * @return 0 on success or a negative error code
705 */
rtnl_link_ipgre_set_remote(struct rtnl_link * link,uint32_t remote)706 int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
707 {
708 struct ipgre_info *ipgre = link->l_info;
709
710 IS_IPGRE_LINK_ASSERT(link);
711
712 ipgre->remote = remote;
713 ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
714
715 return 0;
716 }
717
718 /**
719 * Get IPGRE tunnel remote address
720 * @arg link Link object
721 *
722 * @return remote address on success or a negative error code
723 */
rtnl_link_ipgre_get_remote(struct rtnl_link * link)724 uint32_t rtnl_link_ipgre_get_remote(struct rtnl_link *link)
725 {
726 struct ipgre_info *ipgre = link->l_info;
727
728 IS_IPGRE_LINK_ASSERT(link);
729
730 return ipgre->remote;
731 }
732
733 /**
734 * Set IPGRE tunnel ttl
735 * @arg link Link object
736 * @arg ttl tunnel ttl
737 *
738 * @return 0 on success or a negative error code
739 */
rtnl_link_ipgre_set_ttl(struct rtnl_link * link,uint8_t ttl)740 int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
741 {
742 struct ipgre_info *ipgre = link->l_info;
743
744 IS_IPGRE_LINK_ASSERT(link);
745
746 ipgre->ttl = ttl;
747 ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
748
749 return 0;
750 }
751
752 /**
753 * Set IPGRE tunnel ttl
754 * @arg link Link object
755 *
756 * @return ttl value
757 */
rtnl_link_ipgre_get_ttl(struct rtnl_link * link)758 uint8_t rtnl_link_ipgre_get_ttl(struct rtnl_link *link)
759 {
760 struct ipgre_info *ipgre = link->l_info;
761
762 IS_IPGRE_LINK_ASSERT(link);
763
764 return ipgre->ttl;
765 }
766
767 /**
768 * Set IPGRE tunnel tos
769 * @arg link Link object
770 * @arg tos tunnel tos
771 *
772 * @return 0 on success or a negative error code
773 */
rtnl_link_ipgre_set_tos(struct rtnl_link * link,uint8_t tos)774 int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
775 {
776 struct ipgre_info *ipgre = link->l_info;
777
778 IS_IPGRE_LINK_ASSERT(link);
779
780 ipgre->tos = tos;
781 ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
782
783 return 0;
784 }
785
786 /**
787 * Get IPGRE tunnel tos
788 * @arg link Link object
789 *
790 * @return tos value
791 */
rtnl_link_ipgre_get_tos(struct rtnl_link * link)792 uint8_t rtnl_link_ipgre_get_tos(struct rtnl_link *link)
793 {
794 struct ipgre_info *ipgre = link->l_info;
795
796 IS_IPGRE_LINK_ASSERT(link);
797
798 return ipgre->tos;
799 }
800
801 /**
802 * Set IPGRE tunnel path MTU discovery
803 * @arg link Link object
804 * @arg pmtudisc path MTU discovery
805 *
806 * @return 0 on success or a negative error code
807 */
rtnl_link_ipgre_set_pmtudisc(struct rtnl_link * link,uint8_t pmtudisc)808 int rtnl_link_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
809 {
810 struct ipgre_info *ipgre = link->l_info;
811
812 IS_IPGRE_LINK_ASSERT(link);
813
814 ipgre->pmtudisc = pmtudisc;
815 ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
816
817 return 0;
818 }
819
820 /**
821 * Get IPGRE path MTU discovery
822 * @arg link Link object
823 *
824 * @return pmtudisc value
825 */
rtnl_link_ipgre_get_pmtudisc(struct rtnl_link * link)826 uint8_t rtnl_link_ipgre_get_pmtudisc(struct rtnl_link *link)
827 {
828 struct ipgre_info *ipgre = link->l_info;
829
830 IS_IPGRE_LINK_ASSERT(link);
831
832 return ipgre->pmtudisc;
833 }
834
835 /* Function prototype for ABI-preserving wrapper (not in public header) to avoid
836 * GCC warning about missing prototype. */
837 uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link);
838
rtnl_link_get_pmtudisc(struct rtnl_link * link)839 uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link)
840 {
841 /* rtnl_link_ipgre_get_pmtudisc() was wrongly named. Keep this
842 * to preserve ABI. */
843 return rtnl_link_ipgre_get_pmtudisc (link);
844 }
845
846 /**
847 * Set IPGRE tunnel fwmark
848 * @arg link Link object
849 * @arg fwmark fwmark
850 *
851 * @return 0 on success or a negative error code
852 */
rtnl_link_ipgre_set_fwmark(struct rtnl_link * link,uint32_t fwmark)853 int rtnl_link_ipgre_set_fwmark(struct rtnl_link *link, uint32_t fwmark)
854 {
855 struct ipgre_info *ipgre = link->l_info;
856
857 IS_IPGRE_LINK_ASSERT(link);
858
859 ipgre->fwmark = fwmark;
860 ipgre->ipgre_mask |= IPGRE_ATTR_FWMARK;
861
862 return 0;
863 }
864
865 /**
866 * Get IPGRE tunnel fwmark
867 * @arg link Link object
868 * @arg fwmark addr to fill in with the fwmark
869 *
870 * @return 0 on success or a negative error code
871 */
rtnl_link_ipgre_get_fwmark(struct rtnl_link * link,uint32_t * fwmark)872 int rtnl_link_ipgre_get_fwmark(struct rtnl_link *link, uint32_t *fwmark)
873 {
874 struct ipgre_info *ipgre = link->l_info;
875
876 IS_IPGRE_LINK_ASSERT(link);
877
878 if (!(ipgre->ipgre_mask & IPGRE_ATTR_FWMARK))
879 return -NLE_NOATTR;
880
881 *fwmark = ipgre->fwmark;
882
883 return 0;
884 }
885
ipgre_init(void)886 static void _nl_init ipgre_init(void)
887 {
888 rtnl_link_register_info(&ipgre_info_ops);
889 rtnl_link_register_info(&ipgretap_info_ops);
890 }
891
ipgre_exit(void)892 static void _nl_exit ipgre_exit(void)
893 {
894 rtnl_link_unregister_info(&ipgre_info_ops);
895 rtnl_link_unregister_info(&ipgretap_info_ops);
896 }
897