libnl: /data/src/libnl3/lib/route/link/ipgre.c Source File

libnl 3.10.0

ipgre.c
1/* SPDX-License-Identifier: LGPL-2.1-only */
2/*
3 * Copyright (c) 2014 Susant Sahani <susant@redhat.com>
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
61static 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
75static 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
92static 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
168errout:
169 return err;
170}
171
172static 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
216nla_put_failure:
217
218 return 0;
219}
220
221static 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
229static 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
234static 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
311static 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
332static 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
353static 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
366static 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
386struct 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 */
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 */
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
441struct 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 */
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 */
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 */
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 */
520uint32_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 */
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 */
554uint16_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 */
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 */
588uint16_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 */
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 */
622uint32_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 */
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 */
656uint32_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 */
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 */
690uint32_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 */
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 */
724uint32_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 */
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 */
758uint8_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 */
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 */
792uint8_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 */
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 */
826uint8_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. */
837uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link);
838
839uint8_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 */
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 */
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
886static 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
892static void _nl_exit ipgre_exit(void)
893{
894 rtnl_link_unregister_info(&ipgre_info_ops);
895 rtnl_link_unregister_info(&ipgretap_info_ops);
896}
nla_get_u32
uint32_t nla_get_u32(const struct nlattr *nla)
Return payload of 32 bit integer attribute.
Definition attr.c:712
nla_get_u16
uint16_t nla_get_u16(const struct nlattr *nla)
Return payload of 16 bit integer attribute.
Definition attr.c:662
NLA_PUT_U16
#define NLA_PUT_U16(msg, attrtype, value)
Add 16 bit integer attribute to netlink message.
Definition attr.h:212
NLA_PUT_U8
#define NLA_PUT_U8(msg, attrtype, value)
Add 8 bit integer attribute to netlink message.
Definition attr.h:194
NLA_PUT_U32
#define NLA_PUT_U32(msg, attrtype, value)
Add 32 bit integer attribute to netlink message.
Definition attr.h:230
nla_get_u8
uint8_t nla_get_u8(const struct nlattr *nla)
Return value of 8 bit integer attribute.
Definition attr.c:612
nla_nest_start
struct nlattr * nla_nest_start(struct nl_msg *msg, int attrtype)
Start a new level of nested attributes.
Definition attr.c:908
nla_parse_nested
int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, const struct nla_policy *policy)
Create attribute index based on nested attribute.
Definition attr.c:1035
nla_nest_end
int nla_nest_end(struct nl_msg *msg, struct nlattr *start)
Finalize nesting of attributes.
Definition attr.c:971
NLA_U8
@ NLA_U8
8 bit integer
Definition attr.h:35
NLA_U16
@ NLA_U16
16 bit integer
Definition attr.h:36
NLA_U32
@ NLA_U32
32 bit integer
Definition attr.h:37
rtnl_link_ipgre_get_link
uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
Get IPGRE tunnel interface index.
Definition ipgre.c:520
rtnl_link_ipgre_get_fwmark
int rtnl_link_ipgre_get_fwmark(struct rtnl_link *link, uint32_t *fwmark)
Get IPGRE tunnel fwmark.
Definition ipgre.c:872
rtnl_link_ipgre_set_oflags
int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
Set IPGRE tunnel set oflags.
Definition ipgre.c:570
rtnl_link_ipgretap_add
int rtnl_link_ipgretap_add(struct nl_sock *sk, const char *name)
Create a new IPGRETAP tunnel device.
Definition ipgre.c:477
rtnl_link_ipgre_set_okey
int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
Set IPGRE tunnel set okey.
Definition ipgre.c:638
rtnl_link_is_ipgretap
int rtnl_link_is_ipgretap(struct rtnl_link *link)
Check if link is a IPGRETAP link.
Definition ipgre.c:465
rtnl_link_ipgre_get_iflags
uint16_t rtnl_link_ipgre_get_iflags(struct rtnl_link *link)
Get IPGRE tunnel iflags.
Definition ipgre.c:554
rtnl_link_ipgre_get_tos
uint8_t rtnl_link_ipgre_get_tos(struct rtnl_link *link)
Get IPGRE tunnel tos.
Definition ipgre.c:792
rtnl_link_ipgre_get_ttl
uint8_t rtnl_link_ipgre_get_ttl(struct rtnl_link *link)
Set IPGRE tunnel ttl.
Definition ipgre.c:758
rtnl_link_ipgre_set_local
int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
Set IPGRE tunnel local address.
Definition ipgre.c:672
rtnl_link_ipgre_set_link
int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
Set IPGRE tunnel interface index.
Definition ipgre.c:502
rtnl_link_ipgre_get_pmtudisc
uint8_t rtnl_link_ipgre_get_pmtudisc(struct rtnl_link *link)
Get IPGRE path MTU discovery.
Definition ipgre.c:826
rtnl_link_is_ipgre
int rtnl_link_is_ipgre(struct rtnl_link *link)
Check if link is a IPGRE link.
Definition ipgre.c:410
rtnl_link_ipgre_set_remote
int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
Set IPGRE tunnel remote address.
Definition ipgre.c:706
rtnl_link_ipgre_set_pmtudisc
int rtnl_link_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
Set IPGRE tunnel path MTU discovery.
Definition ipgre.c:808
rtnl_link_ipgre_get_ikey
uint32_t rtnl_link_ipgre_get_ikey(struct rtnl_link *link)
Get IPGRE tunnel ikey.
Definition ipgre.c:622
rtnl_link_ipgre_get_remote
uint32_t rtnl_link_ipgre_get_remote(struct rtnl_link *link)
Get IPGRE tunnel remote address.
Definition ipgre.c:724
rtnl_link_ipgre_add
int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
Create a new IPGRE tunnel device.
Definition ipgre.c:423
rtnl_link_ipgre_set_iflags
int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
Set IPGRE tunnel set iflags.
Definition ipgre.c:536
rtnl_link_ipgre_set_tos
int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
Set IPGRE tunnel tos.
Definition ipgre.c:774
rtnl_link_ipgre_get_oflags
uint16_t rtnl_link_ipgre_get_oflags(struct rtnl_link *link)
Get IPGRE tunnel oflags.
Definition ipgre.c:588
rtnl_link_ipgre_set_fwmark
int rtnl_link_ipgre_set_fwmark(struct rtnl_link *link, uint32_t fwmark)
Set IPGRE tunnel fwmark.
Definition ipgre.c:853
rtnl_link_ipgre_get_okey
uint32_t rtnl_link_ipgre_get_okey(struct rtnl_link *link)
Get IPGRE tunnel okey.
Definition ipgre.c:656
rtnl_link_ipgre_get_local
uint32_t rtnl_link_ipgre_get_local(struct rtnl_link *link)
Get IPGRE tunnel local address.
Definition ipgre.c:690
rtnl_link_ipgre_set_ttl
int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
Set IPGRE tunnel ttl.
Definition ipgre.c:740
rtnl_link_ipgre_set_ikey
int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
Set IPGRE tunnel set ikey.
Definition ipgre.c:604
rtnl_link_register_info
int rtnl_link_register_info(struct rtnl_link_info_ops *ops)
Register operations for a link info type.
Definition api.c:127
rtnl_link_unregister_info
int rtnl_link_unregister_info(struct rtnl_link_info_ops *ops)
Unregister operations for a link info type.
Definition api.c:162
rtnl_link_add
int rtnl_link_add(struct nl_sock *sk, struct rtnl_link *link, int flags)
Add virtual link.
Definition link.c:1694
rtnl_link_alloc
struct rtnl_link * rtnl_link_alloc(void)
Allocate link object.
Definition link.c:1920
rtnl_link_set_name
void rtnl_link_set_name(struct rtnl_link *link, const char *name)
Set name of link object.
Definition link.c:1948
rtnl_link_get_name
char * rtnl_link_get_name(struct rtnl_link *link)
Return name of link object.
Definition link.c:1962
rtnl_link_put
void rtnl_link_put(struct rtnl_link *link)
Release a link object reference.
Definition link.c:1929
rtnl_link_set_type
int rtnl_link_set_type(struct rtnl_link *link, const char *type)
Set type of link object.
Definition link.c:2558
nl_dump
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition utils.c:1015
NL_DUMP_LINE
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition types.h:20
NL_DUMP_DETAILS
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition types.h:21
ipgre_info
Definition ipgre.c:46
nl_dump_params
Dumping parameters.
Definition types.h:32
nla_policy
Attribute validation policy.
Definition attr.h:63
nla_policy::type
uint16_t type
Type of attribute or NLA_UNSPEC.
Definition attr.h:65
rtnl_link_info_ops
Available operations to modules implementing a link info type.
Definition link-api.h:20
rtnl_link_info_ops::io_name
char * io_name
Name of link info type, must match name on kernel side.
Definition link-api.h:22
rtnl_link
Link object.
Definition nl-route.h:29