libnl  3.4.0
ipgre.c
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/route/link/ipgre.h>
32 #include <netlink-private/route/link/api.h>
33 #include <linux/if_tunnel.h>
34 
35 #define IPGRE_ATTR_LINK (1 << 0)
36 #define IPGRE_ATTR_IFLAGS (1 << 1)
37 #define IPGRE_ATTR_OFLAGS (1 << 2)
38 #define IPGRE_ATTR_IKEY (1 << 3)
39 #define IPGRE_ATTR_OKEY (1 << 4)
40 #define IPGRE_ATTR_LOCAL (1 << 5)
41 #define IPGRE_ATTR_REMOTE (1 << 6)
42 #define IPGRE_ATTR_TTL (1 << 7)
43 #define IPGRE_ATTR_TOS (1 << 8)
44 #define IPGRE_ATTR_PMTUDISC (1 << 9)
45 
46 struct ipgre_info
47 {
48  uint8_t ttl;
49  uint8_t tos;
50  uint8_t pmtudisc;
51  uint16_t iflags;
52  uint16_t oflags;
53  uint32_t ikey;
54  uint32_t okey;
55  uint32_t link;
56  uint32_t local;
57  uint32_t remote;
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 };
73 
74 static int ipgre_alloc(struct rtnl_link *link)
75 {
76  struct ipgre_info *ipgre;
77 
78  if (link->l_info)
79  memset(link->l_info, 0, sizeof(*ipgre));
80  else {
81  ipgre = calloc(1, sizeof(*ipgre));
82  if (!ipgre)
83  return -NLE_NOMEM;
84 
85  link->l_info = ipgre;
86  }
87 
88  return 0;
89 }
90 
91 static int ipgre_parse(struct rtnl_link *link, struct nlattr *data,
92  struct nlattr *xstats)
93 {
94  struct nlattr *tb[IFLA_IPTUN_MAX + 1];
95  struct ipgre_info *ipgre;
96  int err;
97 
98  NL_DBG(3, "Parsing IPGRE link info\n");
99 
100  err = nla_parse_nested(tb, IFLA_GRE_MAX, data, ipgre_policy);
101  if (err < 0)
102  goto errout;
103 
104  err = ipgre_alloc(link);
105  if (err < 0)
106  goto errout;
107 
108  ipgre = link->l_info;
109 
110  if (tb[IFLA_GRE_LINK]) {
111  ipgre->link = nla_get_u32(tb[IFLA_GRE_LINK]);
112  ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
113  }
114 
115  if (tb[IFLA_GRE_IFLAGS]) {
116  ipgre->iflags = nla_get_u16(tb[IFLA_GRE_IFLAGS]);
117  ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
118  }
119 
120  if (tb[IFLA_GRE_OFLAGS]) {
121  ipgre->oflags = nla_get_u16(tb[IFLA_GRE_OFLAGS]);
122  ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
123  }
124 
125  if (tb[IFLA_GRE_IKEY]) {
126  ipgre->ikey = nla_get_u32(tb[IFLA_GRE_IKEY]);
127  ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
128  }
129 
130  if (tb[IFLA_GRE_OKEY]) {
131  ipgre->okey = nla_get_u32(tb[IFLA_GRE_OKEY]);
132  ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
133  }
134 
135  if (tb[IFLA_GRE_LOCAL]) {
136  ipgre->local = nla_get_u32(tb[IFLA_GRE_LOCAL]);
137  ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
138  }
139 
140  if (tb[IFLA_GRE_REMOTE]) {
141  ipgre->remote = nla_get_u32(tb[IFLA_GRE_REMOTE]);
142  ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
143  }
144 
145  if (tb[IFLA_GRE_TTL]) {
146  ipgre->ttl = nla_get_u8(tb[IFLA_GRE_TTL]);
147  ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
148  }
149 
150  if (tb[IFLA_GRE_TOS]) {
151  ipgre->tos = nla_get_u8(tb[IFLA_GRE_TOS]);
152  ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
153  }
154 
155  if (tb[IFLA_GRE_PMTUDISC]) {
156  ipgre->pmtudisc = nla_get_u8(tb[IFLA_GRE_PMTUDISC]);
157  ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
158  }
159 
160  err = 0;
161 
162 errout:
163  return err;
164 }
165 
166 static int ipgre_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
167 {
168  struct ipgre_info *ipgre = link->l_info;
169  struct nlattr *data;
170 
171  data = nla_nest_start(msg, IFLA_INFO_DATA);
172  if (!data)
173  return -NLE_MSGSIZE;
174 
175  if (ipgre->ipgre_mask & IPGRE_ATTR_LINK)
176  NLA_PUT_U32(msg, IFLA_GRE_LINK, ipgre->link);
177 
178  if (ipgre->ipgre_mask & IFLA_GRE_IFLAGS)
179  NLA_PUT_U16(msg, IFLA_GRE_IFLAGS, ipgre->iflags);
180 
181  if (ipgre->ipgre_mask & IFLA_GRE_OFLAGS)
182  NLA_PUT_U16(msg, IFLA_GRE_OFLAGS, ipgre->oflags);
183 
184  if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY)
185  NLA_PUT_U32(msg, IFLA_GRE_IKEY, ipgre->ikey);
186 
187  if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY)
188  NLA_PUT_U32(msg, IFLA_GRE_OKEY, ipgre->okey);
189 
190  if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL)
191  NLA_PUT_U32(msg, IFLA_GRE_LOCAL, ipgre->local);
192 
193  if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE)
194  NLA_PUT_U32(msg, IFLA_GRE_REMOTE, ipgre->remote);
195 
196  if (ipgre->ipgre_mask & IPGRE_ATTR_TTL)
197  NLA_PUT_U8(msg, IFLA_GRE_TTL, ipgre->ttl);
198 
199  if (ipgre->ipgre_mask & IPGRE_ATTR_TOS)
200  NLA_PUT_U8(msg, IFLA_GRE_TOS, ipgre->tos);
201 
202  if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC)
203  NLA_PUT_U8(msg, IFLA_GRE_PMTUDISC, ipgre->pmtudisc);
204 
205  nla_nest_end(msg, data);
206 
207 nla_put_failure:
208 
209  return 0;
210 }
211 
212 static void ipgre_free(struct rtnl_link *link)
213 {
214  struct ipgre_info *ipgre = link->l_info;
215 
216  free(ipgre);
217  link->l_info = NULL;
218 }
219 
220 static void ipgre_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
221 {
222  nl_dump(p, "ipgre : %s", link->l_name);
223 }
224 
225 static void ipgre_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
226 {
227  struct ipgre_info *ipgre = link->l_info;
228  char *name, addr[INET_ADDRSTRLEN];
229  struct rtnl_link *parent;
230 
231  if (ipgre->ipgre_mask & IPGRE_ATTR_LINK) {
232  nl_dump(p, " link ");
233 
234  name = NULL;
235  parent = link_lookup(link->ce_cache, ipgre->link);
236  if (parent)
237  name = rtnl_link_get_name(parent);
238 
239  if (name)
240  nl_dump_line(p, "%s\n", name);
241  else
242  nl_dump_line(p, "%u\n", ipgre->link);
243  }
244 
245  if (ipgre->ipgre_mask & IPGRE_ATTR_IFLAGS) {
246  nl_dump(p, " iflags ");
247  nl_dump_line(p, "%x\n", ipgre->iflags);
248  }
249 
250  if (ipgre->ipgre_mask & IPGRE_ATTR_OFLAGS) {
251  nl_dump(p, " oflags ");
252  nl_dump_line(p, "%x\n", ipgre->oflags);
253  }
254 
255  if (ipgre->ipgre_mask & IPGRE_ATTR_IKEY) {
256  nl_dump(p, " ikey ");
257  nl_dump_line(p, "%x\n",ipgre->ikey);
258  }
259 
260  if (ipgre->ipgre_mask & IPGRE_ATTR_OKEY) {
261  nl_dump(p, " okey ");
262  nl_dump_line(p, "%x\n", ipgre->okey);
263  }
264 
265  if (ipgre->ipgre_mask & IPGRE_ATTR_LOCAL) {
266  nl_dump(p, " local ");
267  if(inet_ntop(AF_INET, &ipgre->local, addr, sizeof(addr)))
268  nl_dump_line(p, "%s\n", addr);
269  else
270  nl_dump_line(p, "%#x\n", ntohs(ipgre->local));
271  }
272 
273  if (ipgre->ipgre_mask & IPGRE_ATTR_REMOTE) {
274  nl_dump(p, " remote ");
275  if(inet_ntop(AF_INET, &ipgre->remote, addr, sizeof(addr)))
276  nl_dump_line(p, "%s\n", addr);
277  else
278  nl_dump_line(p, "%#x\n", ntohs(ipgre->remote));
279  }
280 
281  if (ipgre->ipgre_mask & IPGRE_ATTR_TTL) {
282  nl_dump(p, " ttl ");
283  nl_dump_line(p, "%u\n", ipgre->ttl);
284  }
285 
286  if (ipgre->ipgre_mask & IPGRE_ATTR_TOS) {
287  nl_dump(p, " tos ");
288  nl_dump_line(p, "%u\n", ipgre->tos);
289  }
290 
291  if (ipgre->ipgre_mask & IPGRE_ATTR_PMTUDISC) {
292  nl_dump(p, " pmtudisc ");
293  nl_dump_line(p, "enabled (%#x)\n", ipgre->pmtudisc);
294  }
295 }
296 
297 static int ipgre_clone(struct rtnl_link *dst, struct rtnl_link *src)
298 {
299  struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
300  int err;
301 
302  dst->l_info = NULL;
303 
304  err = rtnl_link_set_type(dst, "gre");
305  if (err < 0)
306  return err;
307 
308  ipgre_dst = dst->l_info;
309 
310  if (!ipgre_dst || !ipgre_src)
311  BUG();
312 
313  memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
314 
315  return 0;
316 }
317 
318 static int ipgretap_clone(struct rtnl_link *dst, struct rtnl_link *src)
319 {
320  struct ipgre_info *ipgre_dst, *ipgre_src = src->l_info;
321  int err;
322 
323  dst->l_info = NULL;
324 
325  err = rtnl_link_set_type(dst, "gretap");
326  if (err < 0)
327  return err;
328 
329  ipgre_dst = dst->l_info;
330 
331  if (!ipgre_dst || !ipgre_src)
332  BUG();
333 
334  memcpy(ipgre_dst, ipgre_src, sizeof(struct ipgre_info));
335 
336  return 0;
337 }
338 
339 static struct rtnl_link_info_ops ipgre_info_ops = {
340  .io_name = "gre",
341  .io_alloc = ipgre_alloc,
342  .io_parse = ipgre_parse,
343  .io_dump = {
344  [NL_DUMP_LINE] = ipgre_dump_line,
345  [NL_DUMP_DETAILS] = ipgre_dump_details,
346  },
347  .io_clone = ipgre_clone,
348  .io_put_attrs = ipgre_put_attrs,
349  .io_free = ipgre_free,
350 };
351 
352 static struct rtnl_link_info_ops ipgretap_info_ops = {
353  .io_name = "gretap",
354  .io_alloc = ipgre_alloc,
355  .io_parse = ipgre_parse,
356  .io_dump = {
357  [NL_DUMP_LINE] = ipgre_dump_line,
358  [NL_DUMP_DETAILS] = ipgre_dump_details,
359  },
360  .io_clone = ipgretap_clone,
361  .io_put_attrs = ipgre_put_attrs,
362  .io_free = ipgre_free,
363 };
364 
365 #define IS_IPGRE_LINK_ASSERT(link) \
366  if ((link)->l_info_ops != &ipgre_info_ops && \
367  (link)->l_info_ops != &ipgretap_info_ops) { \
368  APPBUG("Link is not a ipgre link. set type \"gre/gretap\" first.");\
369  return -NLE_OPNOTSUPP; \
370  }
371 
372 struct rtnl_link *rtnl_link_ipgre_alloc(void)
373 {
374  struct rtnl_link *link;
375  int err;
376 
377  link = rtnl_link_alloc();
378  if (!link)
379  return NULL;
380 
381  err = rtnl_link_set_type(link, "gre");
382  if (err < 0) {
383  rtnl_link_put(link);
384  return NULL;
385  }
386 
387  return link;
388 }
389 
390 /**
391  * Check if link is a IPGRE link
392  * @arg link Link object
393  *
394  * @return True if link is a IPGRE link, otherwise 0 is returned.
395  */
396 int rtnl_link_is_ipgre(struct rtnl_link *link)
397 {
398  return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gre");
399 }
400 
401 /**
402  * Create a new IPGRE tunnel device
403  * @arg sock netlink socket
404  * @arg name name of the tunnel deviceL
405  *
406  * Creates a new ipip tunnel device in the kernel
407  * @return 0 on success or a negative error code
408  */
409 int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
410 {
411  struct rtnl_link *link;
412  int err;
413 
414  link = rtnl_link_ipgre_alloc();
415  if (!link)
416  return -NLE_NOMEM;
417 
418  if(name)
419  rtnl_link_set_name(link, name);
420 
421  err = rtnl_link_add(sk, link, NLM_F_CREATE);
422  rtnl_link_put(link);
423 
424  return err;
425 }
426 
427 struct rtnl_link *rtnl_link_ipgretap_alloc(void)
428 {
429  struct rtnl_link *link;
430  int err;
431 
432  link = rtnl_link_alloc();
433  if (!link)
434  return NULL;
435 
436  err = rtnl_link_set_type(link, "gretap");
437  if (err < 0) {
438  rtnl_link_put(link);
439  return NULL;
440  }
441 
442  return link;
443 }
444 
445 /**
446  * Check if link is a IPGRETAP link
447  * @arg link Link object
448  *
449  * @return True if link is a IPGRETAP link, otherwise 0 is returned.
450  */
452 {
453  return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "gretap");
454 }
455 /**
456  * Create a new IPGRETAP tunnel device
457  * @arg sock netlink socket
458  * @arg name name of the tunnel deviceL
459  *
460  * Creates a new IPGRETAP tunnel device in the kernel
461  * @return 0 on success or a negative error code
462  */
463 int rtnl_link_ipgretap_add(struct nl_sock *sk, const char *name)
464 {
465  struct rtnl_link *link;
466  int err;
467 
468  link = rtnl_link_ipgretap_alloc();
469  if (!link)
470  return -NLE_NOMEM;
471 
472  if(name)
473  rtnl_link_set_name(link, name);
474 
475  err = rtnl_link_add(sk, link, NLM_F_CREATE);
476  rtnl_link_put(link);
477 
478  return err;
479 }
480 
481 /**
482  * Set IPGRE tunnel interface index
483  * @arg link Link object
484  * @arg index interface index
485  *
486  * @return 0 on success or a negative error code
487  */
488 int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
489 {
490  struct ipgre_info *ipgre = link->l_info;
491 
492  IS_IPGRE_LINK_ASSERT(link);
493 
494  ipgre->link = index;
495  ipgre->ipgre_mask |= IPGRE_ATTR_LINK;
496 
497  return 0;
498 }
499 
500 /**
501  * Get IPGRE tunnel interface index
502  * @arg link Link object
503  *
504  * @return interface index
505  */
506 uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
507 {
508  struct ipgre_info *ipgre = link->l_info;
509 
510  IS_IPGRE_LINK_ASSERT(link);
511 
512  return ipgre->link;
513 }
514 
515 /**
516  * Set IPGRE tunnel set iflags
517  * @arg link Link object
518  * @arg iflags gre iflags
519  *
520  * @return 0 on success or a negative error code
521  */
522 int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
523 {
524  struct ipgre_info *ipgre = link->l_info;
525 
526  IS_IPGRE_LINK_ASSERT(link);
527 
528  ipgre->iflags = iflags;
529  ipgre->ipgre_mask |= IPGRE_ATTR_IFLAGS;
530 
531  return 0;
532 }
533 
534 /**
535  * Get IPGRE tunnel iflags
536  * @arg link Link object
537  *
538  * @return iflags
539  */
540 uint16_t rtnl_link_ipgre_get_iflags(struct rtnl_link *link)
541 {
542  struct ipgre_info *ipgre = link->l_info;
543 
544  IS_IPGRE_LINK_ASSERT(link);
545 
546  return ipgre->iflags;
547 }
548 
549 /**
550  * Set IPGRE tunnel set oflags
551  * @arg link Link object
552  * @arg iflags gre oflags
553  *
554  * @return 0 on success or a negative error code
555  */
556 int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
557 {
558  struct ipgre_info *ipgre = link->l_info;
559 
560  IS_IPGRE_LINK_ASSERT(link);
561 
562  ipgre->oflags = oflags;
563  ipgre->ipgre_mask |= IPGRE_ATTR_OFLAGS;
564 
565  return 0;
566 }
567 
568 /**
569  * Get IPGRE tunnel oflags
570  * @arg link Link object
571  *
572  * @return oflags
573  */
574 uint16_t rtnl_link_ipgre_get_oflags(struct rtnl_link *link)
575 {
576  struct ipgre_info *ipgre = link->l_info;
577 
578  IS_IPGRE_LINK_ASSERT(link);
579 
580  return ipgre->oflags;
581 }
582 
583 /**
584  * Set IPGRE tunnel set ikey
585  * @arg link Link object
586  * @arg ikey gre ikey
587  *
588  * @return 0 on success or a negative error code
589  */
590 int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
591 {
592  struct ipgre_info *ipgre = link->l_info;
593 
594  IS_IPGRE_LINK_ASSERT(link);
595 
596  ipgre->ikey = ikey;
597  ipgre->ipgre_mask |= IPGRE_ATTR_IKEY;
598 
599  return 0;
600 }
601 
602 /**
603  * Get IPGRE tunnel ikey
604  * @arg link Link object
605  *
606  * @return ikey
607  */
608 uint32_t rtnl_link_ipgre_get_ikey(struct rtnl_link *link)
609 {
610  struct ipgre_info *ipgre = link->l_info;
611 
612  IS_IPGRE_LINK_ASSERT(link);
613 
614  return ipgre->ikey;
615 }
616 
617 /**
618  * Set IPGRE tunnel set okey
619  * @arg link Link object
620  * @arg okey gre okey
621  *
622  * @return 0 on success or a negative error code
623  */
624 int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
625 {
626  struct ipgre_info *ipgre = link->l_info;
627 
628  IS_IPGRE_LINK_ASSERT(link);
629 
630  ipgre->okey = okey;
631  ipgre->ipgre_mask |= IPGRE_ATTR_OKEY;
632 
633  return 0;
634 }
635 
636 /**
637  * Get IPGRE tunnel okey
638  * @arg link Link object
639  *
640  * @return okey value
641  */
642 uint32_t rtnl_link_ipgre_get_okey(struct rtnl_link *link)
643 {
644  struct ipgre_info *ipgre = link->l_info;
645 
646  IS_IPGRE_LINK_ASSERT(link);
647 
648  return ipgre->okey;
649 }
650 
651 /**
652  * Set IPGRE tunnel local address
653  * @arg link Link object
654  * @arg addr local address
655  *
656  * @return 0 on success or a negative error code
657  */
658 int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
659 {
660  struct ipgre_info *ipgre = link->l_info;
661 
662  IS_IPGRE_LINK_ASSERT(link);
663 
664  ipgre->local = addr;
665  ipgre->ipgre_mask |= IPGRE_ATTR_LOCAL;
666 
667  return 0;
668 }
669 
670 /**
671  * Get IPGRE tunnel local address
672  * @arg link Link object
673  *
674  * @return local address
675  */
676 uint32_t rtnl_link_ipgre_get_local(struct rtnl_link *link)
677 {
678  struct ipgre_info *ipgre = link->l_info;
679 
680  IS_IPGRE_LINK_ASSERT(link);
681 
682  return ipgre->local;
683 }
684 
685 /**
686  * Set IPGRE tunnel remote address
687  * @arg link Link object
688  * @arg remote remote address
689  *
690  * @return 0 on success or a negative error code
691  */
692 int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
693 {
694  struct ipgre_info *ipgre = link->l_info;
695 
696  IS_IPGRE_LINK_ASSERT(link);
697 
698  ipgre->remote = remote;
699  ipgre->ipgre_mask |= IPGRE_ATTR_REMOTE;
700 
701  return 0;
702 }
703 
704 /**
705  * Get IPGRE tunnel remote address
706  * @arg link Link object
707  *
708  * @return remote address on success or a negative error code
709  */
710 uint32_t rtnl_link_ipgre_get_remote(struct rtnl_link *link)
711 {
712  struct ipgre_info *ipgre = link->l_info;
713 
714  IS_IPGRE_LINK_ASSERT(link);
715 
716  return ipgre->remote;
717 }
718 
719 /**
720  * Set IPGRE tunnel ttl
721  * @arg link Link object
722  * @arg ttl tunnel ttl
723  *
724  * @return 0 on success or a negative error code
725  */
726 int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
727 {
728  struct ipgre_info *ipgre = link->l_info;
729 
730  IS_IPGRE_LINK_ASSERT(link);
731 
732  ipgre->ttl = ttl;
733  ipgre->ipgre_mask |= IPGRE_ATTR_TTL;
734 
735  return 0;
736 }
737 
738 /**
739  * Set IPGRE tunnel ttl
740  * @arg link Link object
741  *
742  * @return ttl value
743  */
744 uint8_t rtnl_link_ipgre_get_ttl(struct rtnl_link *link)
745 {
746  struct ipgre_info *ipgre = link->l_info;
747 
748  IS_IPGRE_LINK_ASSERT(link);
749 
750  return ipgre->ttl;
751 }
752 
753 /**
754  * Set IPGRE tunnel tos
755  * @arg link Link object
756  * @arg tos tunnel tos
757  *
758  * @return 0 on success or a negative error code
759  */
760 int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
761 {
762  struct ipgre_info *ipgre = link->l_info;
763 
764  IS_IPGRE_LINK_ASSERT(link);
765 
766  ipgre->tos = tos;
767  ipgre->ipgre_mask |= IPGRE_ATTR_TOS;
768 
769  return 0;
770 }
771 
772 /**
773  * Get IPGRE tunnel tos
774  * @arg link Link object
775  *
776  * @return tos value
777  */
778 uint8_t rtnl_link_ipgre_get_tos(struct rtnl_link *link)
779 {
780  struct ipgre_info *ipgre = link->l_info;
781 
782  IS_IPGRE_LINK_ASSERT(link);
783 
784  return ipgre->tos;
785 }
786 
787 /**
788  * Set IPGRE tunnel path MTU discovery
789  * @arg link Link object
790  * @arg pmtudisc path MTU discovery
791  *
792  * @return 0 on success or a negative error code
793  */
794 int rtnl_link_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
795 {
796  struct ipgre_info *ipgre = link->l_info;
797 
798  IS_IPGRE_LINK_ASSERT(link);
799 
800  ipgre->pmtudisc = pmtudisc;
801  ipgre->ipgre_mask |= IPGRE_ATTR_PMTUDISC;
802 
803  return 0;
804 }
805 
806 /**
807  * Get IPGRE path MTU discovery
808  * @arg link Link object
809  *
810  * @return pmtudisc value
811  */
813 {
814  struct ipgre_info *ipgre = link->l_info;
815 
816  IS_IPGRE_LINK_ASSERT(link);
817 
818  return ipgre->pmtudisc;
819 }
820 
821 /* Function prototype for ABI-preserving wrapper (not in public header) to avoid
822  * GCC warning about missing prototype. */
823 uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link);
824 
825 uint8_t rtnl_link_get_pmtudisc(struct rtnl_link *link)
826 {
827  /* rtnl_link_ipgre_get_pmtudisc() was wrongly named. Keep this
828  * to preserve ABI. */
829  return rtnl_link_ipgre_get_pmtudisc (link);
830 }
831 
832 static void __init ipgre_init(void)
833 {
834  rtnl_link_register_info(&ipgre_info_ops);
835  rtnl_link_register_info(&ipgretap_info_ops);
836 }
837 
838 static void __exit ipgre_exit(void)
839 {
840  rtnl_link_unregister_info(&ipgre_info_ops);
841  rtnl_link_unregister_info(&ipgretap_info_ops);
842 }
Dump object briefly on one line.
Definition: types.h:22
8 bit integer
Definition: attr.h:41
uint8_t rtnl_link_ipgre_get_ttl(struct rtnl_link *link)
Set IPGRE tunnel ttl.
Definition: ipgre.c:744
int rtnl_link_is_ipgre(struct rtnl_link *link)
Check if link is a IPGRE link.
Definition: ipgre.c:396
int rtnl_link_ipgre_set_tos(struct rtnl_link *link, uint8_t tos)
Set IPGRE tunnel tos.
Definition: ipgre.c:760
int rtnl_link_ipgre_set_ikey(struct rtnl_link *link, uint32_t ikey)
Set IPGRE tunnel set ikey.
Definition: ipgre.c:590
int rtnl_link_ipgretap_add(struct nl_sock *sk, const char *name)
Create a new IPGRETAP tunnel device.
Definition: ipgre.c:463
Attribute validation policy.
Definition: attr.h:69
uint8_t nla_get_u8(const struct nlattr *nla)
Return value of 8 bit integer attribute.
Definition: attr.c:606
int rtnl_link_ipgre_set_link(struct rtnl_link *link, uint32_t index)
Set IPGRE tunnel interface index.
Definition: ipgre.c:488
uint32_t rtnl_link_ipgre_get_ikey(struct rtnl_link *link)
Get IPGRE tunnel ikey.
Definition: ipgre.c:608
uint32_t rtnl_link_ipgre_get_link(struct rtnl_link *link)
Get IPGRE tunnel interface index.
Definition: ipgre.c:506
uint32_t nla_get_u32(const struct nlattr *nla)
Return payload of 32 bit integer attribute.
Definition: attr.c:706
uint8_t rtnl_link_ipgre_get_tos(struct rtnl_link *link)
Get IPGRE tunnel tos.
Definition: ipgre.c:778
int rtnl_link_ipgre_set_iflags(struct rtnl_link *link, uint16_t iflags)
Set IPGRE tunnel set iflags.
Definition: ipgre.c:522
#define NLA_PUT_U8(msg, attrtype, value)
Add 8 bit integer attribute to netlink message.
Definition: attr.h:199
uint16_t rtnl_link_ipgre_get_oflags(struct rtnl_link *link)
Get IPGRE tunnel oflags.
Definition: ipgre.c:574
int rtnl_link_is_ipgretap(struct rtnl_link *link)
Check if link is a IPGRETAP link.
Definition: ipgre.c:451
Dump all attributes but no statistics.
Definition: types.h:23
int nla_nest_end(struct nl_msg *msg, struct nlattr *start)
Finalize nesting of attributes.
Definition: attr.c:924
uint32_t rtnl_link_ipgre_get_local(struct rtnl_link *link)
Get IPGRE tunnel local address.
Definition: ipgre.c:676
int nla_parse_nested(struct nlattr *tb[], int maxtype, struct nlattr *nla, struct nla_policy *policy)
Create attribute index based on nested attribute.
Definition: attr.c:999
16 bit integer
Definition: attr.h:42
uint8_t rtnl_link_ipgre_get_pmtudisc(struct rtnl_link *link)
Get IPGRE path MTU discovery.
Definition: ipgre.c:812
int rtnl_link_ipgre_set_local(struct rtnl_link *link, uint32_t addr)
Set IPGRE tunnel local address.
Definition: ipgre.c:658
#define NLA_PUT_U32(msg, attrtype, value)
Add 32 bit integer attribute to netlink message.
Definition: attr.h:235
uint32_t rtnl_link_ipgre_get_okey(struct rtnl_link *link)
Get IPGRE tunnel okey.
Definition: ipgre.c:642
int rtnl_link_ipgre_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
Set IPGRE tunnel path MTU discovery.
Definition: ipgre.c:794
int rtnl_link_ipgre_add(struct nl_sock *sk, const char *name)
Create a new IPGRE tunnel device.
Definition: ipgre.c:409
uint32_t rtnl_link_ipgre_get_remote(struct rtnl_link *link)
Get IPGRE tunnel remote address.
Definition: ipgre.c:710
int rtnl_link_ipgre_set_okey(struct rtnl_link *link, uint32_t okey)
Set IPGRE tunnel set okey.
Definition: ipgre.c:624
uint16_t type
Type of attribute or NLA_UNSPEC.
Definition: attr.h:71
uint16_t nla_get_u16(const struct nlattr *nla)
Return payload of 16 bit integer attribute.
Definition: attr.c:656
32 bit integer
Definition: attr.h:43
uint16_t rtnl_link_ipgre_get_iflags(struct rtnl_link *link)
Get IPGRE tunnel iflags.
Definition: ipgre.c:540
Dumping parameters.
Definition: types.h:33
#define NLA_PUT_U16(msg, attrtype, value)
Add 16 bit integer attribute to netlink message.
Definition: attr.h:217
int rtnl_link_ipgre_set_ttl(struct rtnl_link *link, uint8_t ttl)
Set IPGRE tunnel ttl.
Definition: ipgre.c:726
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:961
int rtnl_link_ipgre_set_remote(struct rtnl_link *link, uint32_t remote)
Set IPGRE tunnel remote address.
Definition: ipgre.c:692
int rtnl_link_ipgre_set_oflags(struct rtnl_link *link, uint16_t oflags)
Set IPGRE tunnel set oflags.
Definition: ipgre.c:556
struct nlattr * nla_nest_start(struct nl_msg *msg, int attrtype)
Start a new level of nested attributes.
Definition: attr.c:902