libnl  3.7.0
sit.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 sit SIT
9  * sit link module
10  *
11  * @details
12  * \b Link Type Name: "sit"
13  *
14  * @route_doc{link_sit, SIT Documentation}
15  *
16  * @{
17  */
18 
19 #include <netlink-private/netlink.h>
20 #include <netlink/netlink.h>
21 #include <netlink/attr.h>
22 #include <netlink/utils.h>
23 #include <netlink/object.h>
24 #include <netlink/route/rtnl.h>
25 #include <netlink/route/link/sit.h>
26 #include <netlink-private/route/link/api.h>
27 #include <linux/if_tunnel.h>
28 
29 #define SIT_ATTR_LINK (1 << 0)
30 #define SIT_ATTR_LOCAL (1 << 1)
31 #define SIT_ATTR_REMOTE (1 << 2)
32 #define SIT_ATTR_TTL (1 << 3)
33 #define SIT_ATTR_TOS (1 << 4)
34 #define SIT_ATTR_PMTUDISC (1 << 5)
35 #define SIT_ATTR_FLAGS (1 << 6)
36 #define SIT_ATTR_PROTO (1 << 7)
37 #define SIT_ATTR_6RD_PREFIX (1 << 8)
38 #define SIT_ATTR_6RD_RELAY_PREFIX (1 << 9)
39 #define SIT_ATTR_6RD_PREFIXLEN (1 << 10)
40 #define SIT_ATTR_6RD_RELAY_PREFIXLEN (1 << 11)
41 #define SIT_ATTR_FWMARK (1 << 12)
42 
43 struct sit_info
44 {
45  uint8_t ttl;
46  uint8_t tos;
47  uint8_t pmtudisc;
48  uint8_t proto;
49  uint16_t flags;
50  uint32_t link;
51  uint32_t local;
52  uint32_t remote;
53  struct in6_addr ip6rd_prefix;
54  uint32_t ip6rd_relay_prefix;
55  uint16_t ip6rd_prefixlen;
56  uint16_t ip6rd_relay_prefixlen;
57  uint32_t fwmark;
58  uint32_t sit_mask;
59 };
60 
61 static struct nla_policy sit_policy[IFLA_IPTUN_MAX + 1] = {
62  [IFLA_IPTUN_LINK] = { .type = NLA_U32 },
63  [IFLA_IPTUN_LOCAL] = { .type = NLA_U32 },
64  [IFLA_IPTUN_REMOTE] = { .type = NLA_U32 },
65  [IFLA_IPTUN_TTL] = { .type = NLA_U8 },
66  [IFLA_IPTUN_TOS] = { .type = NLA_U8 },
67  [IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 },
68  [IFLA_IPTUN_FLAGS] = { .type = NLA_U16 },
69  [IFLA_IPTUN_PROTO] = { .type = NLA_U8 },
70  [IFLA_IPTUN_6RD_PREFIX] = { .minlen = sizeof(struct in6_addr) },
71  [IFLA_IPTUN_6RD_RELAY_PREFIX] = { .type = NLA_U32 },
72  [IFLA_IPTUN_6RD_PREFIXLEN] = { .type = NLA_U16 },
73  [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 },
74  [IFLA_IPTUN_FWMARK] = { .type = NLA_U32 },
75 };
76 
77 static int sit_alloc(struct rtnl_link *link)
78 {
79  struct sit_info *sit;
80 
81  if (link->l_info)
82  memset(link->l_info, 0, sizeof(*sit));
83  else {
84  sit = calloc(1, sizeof(*sit));
85  if (!sit)
86  return -NLE_NOMEM;
87 
88  link->l_info = sit;
89  }
90 
91  return 0;
92 }
93 
94 static int sit_parse(struct rtnl_link *link, struct nlattr *data,
95  struct nlattr *xstats)
96 {
97  struct nlattr *tb[IFLA_IPTUN_MAX + 1];
98  struct sit_info *sit;
99  int err;
100 
101  NL_DBG(3, "Parsing SIT link info\n");
102 
103  err = nla_parse_nested(tb, IFLA_IPTUN_MAX, data, sit_policy);
104  if (err < 0)
105  goto errout;
106 
107  err = sit_alloc(link);
108  if (err < 0)
109  goto errout;
110 
111  sit = link->l_info;
112 
113  if (tb[IFLA_IPTUN_LINK]) {
114  sit->link = nla_get_u32(tb[IFLA_IPTUN_LINK]);
115  sit->sit_mask |= SIT_ATTR_LINK;
116  }
117 
118  if (tb[IFLA_IPTUN_LOCAL]) {
119  sit->local = nla_get_u32(tb[IFLA_IPTUN_LOCAL]);
120  sit->sit_mask |= SIT_ATTR_LOCAL;
121  }
122 
123  if (tb[IFLA_IPTUN_REMOTE]) {
124  sit->remote = nla_get_u32(tb[IFLA_IPTUN_REMOTE]);
125  sit->sit_mask |= SIT_ATTR_REMOTE;
126  }
127 
128  if (tb[IFLA_IPTUN_TTL]) {
129  sit->ttl = nla_get_u8(tb[IFLA_IPTUN_TTL]);
130  sit->sit_mask |= SIT_ATTR_TTL;
131  }
132 
133  if (tb[IFLA_IPTUN_TOS]) {
134  sit->tos = nla_get_u8(tb[IFLA_IPTUN_TOS]);
135  sit->sit_mask |= SIT_ATTR_TOS;
136  }
137 
138  if (tb[IFLA_IPTUN_PMTUDISC]) {
139  sit->pmtudisc = nla_get_u8(tb[IFLA_IPTUN_PMTUDISC]);
140  sit->sit_mask |= SIT_ATTR_PMTUDISC;
141  }
142 
143  if (tb[IFLA_IPTUN_FLAGS]) {
144  sit->flags = nla_get_u16(tb[IFLA_IPTUN_FLAGS]);
145  sit->sit_mask |= SIT_ATTR_FLAGS;
146  }
147 
148  if (tb[IFLA_IPTUN_PROTO]) {
149  sit->proto = nla_get_u8(tb[IFLA_IPTUN_PROTO]);
150  sit->sit_mask |= SIT_ATTR_PROTO;
151  }
152 
153  if (tb[IFLA_IPTUN_6RD_PREFIX]) {
154  nla_memcpy(&sit->ip6rd_prefix, tb[IFLA_IPTUN_6RD_PREFIX],
155  sizeof(struct in6_addr));
156  sit->sit_mask |= SIT_ATTR_6RD_PREFIX;
157  }
158 
159  if (tb[IFLA_IPTUN_6RD_RELAY_PREFIX]) {
160  sit->ip6rd_relay_prefix = nla_get_u32(tb[IFLA_IPTUN_6RD_RELAY_PREFIX]);
161  sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIX;
162  }
163 
164  if (tb[IFLA_IPTUN_6RD_PREFIXLEN]) {
165  sit->ip6rd_prefixlen = nla_get_u16(tb[IFLA_IPTUN_6RD_PREFIXLEN]);
166  sit->sit_mask |= SIT_ATTR_6RD_PREFIXLEN;
167  }
168 
169  if (tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) {
170  sit->ip6rd_relay_prefixlen = nla_get_u16(tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
171  sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIXLEN;
172  }
173 
174  if (tb[IFLA_IPTUN_FWMARK]) {
175  sit->fwmark = nla_get_u32(tb[IFLA_IPTUN_FWMARK]);
176  sit->sit_mask |= SIT_ATTR_FWMARK;
177  }
178 
179  err = 0;
180 
181 errout:
182  return err;
183 }
184 
185 static int sit_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
186 {
187  struct sit_info *sit = link->l_info;
188  struct nlattr *data;
189 
190  data = nla_nest_start(msg, IFLA_INFO_DATA);
191  if (!data)
192  return -NLE_MSGSIZE;
193 
194  if (sit->sit_mask & SIT_ATTR_LINK)
195  NLA_PUT_U32(msg, IFLA_IPTUN_LINK, sit->link);
196 
197  if (sit->sit_mask & SIT_ATTR_LOCAL)
198  NLA_PUT_U32(msg, IFLA_IPTUN_LOCAL, sit->local);
199 
200  if (sit->sit_mask & SIT_ATTR_REMOTE)
201  NLA_PUT_U32(msg, IFLA_IPTUN_REMOTE, sit->remote);
202 
203  if (sit->sit_mask & SIT_ATTR_TTL)
204  NLA_PUT_U8(msg, IFLA_IPTUN_TTL, sit->ttl);
205 
206  if (sit->sit_mask & SIT_ATTR_TOS)
207  NLA_PUT_U8(msg, IFLA_IPTUN_TOS, sit->tos);
208 
209  if (sit->sit_mask & SIT_ATTR_PMTUDISC)
210  NLA_PUT_U8(msg, IFLA_IPTUN_PMTUDISC, sit->pmtudisc);
211 
212  if (sit->sit_mask & SIT_ATTR_FLAGS)
213  NLA_PUT_U16(msg, IFLA_IPTUN_FLAGS, sit->flags);
214 
215  if (sit->sit_mask & SIT_ATTR_PROTO)
216  NLA_PUT_U8(msg, IFLA_IPTUN_PROTO, sit->proto);
217 
218  if (sit->sit_mask & SIT_ATTR_6RD_PREFIX)
219  NLA_PUT(msg, IFLA_IPTUN_6RD_PREFIX, sizeof(struct in6_addr), &sit->ip6rd_prefix);
220 
221  if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX)
222  NLA_PUT_U32(msg, IFLA_IPTUN_6RD_RELAY_PREFIX, sit->ip6rd_relay_prefix);
223 
224  if (sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN)
225  NLA_PUT_U16(msg, IFLA_IPTUN_6RD_PREFIXLEN, sit->ip6rd_prefixlen);
226 
227  if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIXLEN)
228  NLA_PUT_U16(msg, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, sit->ip6rd_relay_prefixlen);
229 
230  if (sit->sit_mask & SIT_ATTR_FWMARK)
231  NLA_PUT_U32(msg, IFLA_IPTUN_FWMARK, sit->fwmark);
232 
233  nla_nest_end(msg, data);
234 
235 nla_put_failure:
236 
237  return 0;
238 }
239 
240 static void sit_free(struct rtnl_link *link)
241 {
242  struct sit_info *sit = link->l_info;
243 
244  free(sit);
245  link->l_info = NULL;
246 }
247 
248 static void sit_dump_line(struct rtnl_link *link, struct nl_dump_params *p)
249 {
250  nl_dump(p, "sit : %s", link->l_name);
251 }
252 
253 static void sit_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
254 {
255  struct sit_info *sit = link->l_info;
256  char *name, addr[INET_ADDRSTRLEN], addr6[INET6_ADDRSTRLEN];
257  struct rtnl_link *parent;
258 
259  if (sit->sit_mask & SIT_ATTR_LINK) {
260  nl_dump(p, " link ");
261 
262  name = NULL;
263  parent = link_lookup(link->ce_cache, sit->link);
264  if (parent)
265  name = rtnl_link_get_name(parent);
266 
267  if (name)
268  nl_dump_line(p, "%s\n", name);
269  else
270  nl_dump_line(p, "%u\n", sit->link);
271  }
272 
273  if (sit->sit_mask & SIT_ATTR_LOCAL) {
274  nl_dump(p, " local ");
275  if(inet_ntop(AF_INET, &sit->local, addr, sizeof(addr)))
276  nl_dump_line(p, "%s\n", addr);
277  else
278  nl_dump_line(p, "%#x\n", ntohs(sit->local));
279  }
280 
281  if (sit->sit_mask & SIT_ATTR_REMOTE) {
282  nl_dump(p, " remote ");
283  if(inet_ntop(AF_INET, &sit->remote, addr, sizeof(addr)))
284  nl_dump_line(p, "%s\n", addr);
285  else
286  nl_dump_line(p, "%#x\n", ntohs(sit->remote));
287  }
288 
289  if (sit->sit_mask & SIT_ATTR_TTL) {
290  nl_dump(p, " ttl ");
291  nl_dump_line(p, "%u\n", sit->ttl);
292  }
293 
294  if (sit->sit_mask & SIT_ATTR_TOS) {
295  nl_dump(p, " tos ");
296  nl_dump_line(p, "%u\n", sit->tos);
297  }
298 
299  if (sit->sit_mask & SIT_ATTR_FLAGS) {
300  nl_dump(p, " flags ");
301  nl_dump_line(p, " (%x)\n", sit->flags);
302  }
303 
304  if (sit->sit_mask & SIT_ATTR_PROTO) {
305  nl_dump(p, " proto ");
306  nl_dump_line(p, " (%x)\n", sit->proto);
307  }
308 
309  if (sit->sit_mask & SIT_ATTR_6RD_PREFIX) {
310  nl_dump(p, " 6rd_prefix ");
311  if(inet_ntop(AF_INET6, &sit->ip6rd_prefix, addr6, INET6_ADDRSTRLEN))
312  nl_dump_line(p, "%s\n", addr6);
313  else
314  nl_dump_line(p, "[unknown]\n");
315  }
316 
317  if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX) {
318  nl_dump(p, " 6rd_relay_prefix ");
319  if(inet_ntop(AF_INET, &sit->ip6rd_relay_prefix, addr, sizeof(addr)))
320  nl_dump_line(p, "%s\n", addr);
321  else
322  nl_dump_line(p, "[unknown]\n");
323  }
324 
325  if (sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN) {
326  nl_dump(p, " 6rd_prefixlen ");
327  nl_dump_line(p, "%d\n", sit->ip6rd_prefixlen);
328  }
329 
330  if (sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIXLEN) {
331  nl_dump(p, " 6rd_relay_prefixlen ");
332  nl_dump_line(p, "%d\n", sit->ip6rd_relay_prefixlen);
333  }
334 
335  if (sit->sit_mask & SIT_ATTR_FWMARK) {
336  nl_dump(p, " fwmark ");
337  nl_dump_line(p, "%x\n", sit->fwmark);
338  }
339 }
340 
341 static int sit_clone(struct rtnl_link *dst, struct rtnl_link *src)
342 {
343  struct sit_info *sit_dst, *sit_src = src->l_info;
344  int err;
345 
346  dst->l_info = NULL;
347 
348  err = rtnl_link_set_type(dst, "sit");
349  if (err < 0)
350  return err;
351 
352  sit_dst = dst->l_info;
353 
354  if (!sit_dst || !sit_src)
355  return -NLE_NOMEM;
356 
357  memcpy(sit_dst, sit_src, sizeof(struct sit_info));
358 
359  return 0;
360 }
361 
362 static struct rtnl_link_info_ops sit_info_ops = {
363  .io_name = "sit",
364  .io_alloc = sit_alloc,
365  .io_parse = sit_parse,
366  .io_dump = {
367  [NL_DUMP_LINE] = sit_dump_line,
368  [NL_DUMP_DETAILS] = sit_dump_details,
369  },
370  .io_clone = sit_clone,
371  .io_put_attrs = sit_put_attrs,
372  .io_free = sit_free,
373 };
374 
375 #define IS_SIT_LINK_ASSERT(link, sit) \
376  struct sit_info *sit; \
377  do { \
378  const struct rtnl_link *_link = (link); \
379  if (!_link || _link->l_info_ops != &sit_info_ops) { \
380  APPBUG("Link is not a sit link. set type \"sit\" first."); \
381  return -NLE_OPNOTSUPP; \
382  } \
383  (sit) = _link->l_info; \
384  } while (0)
385 
386 struct rtnl_link *rtnl_link_sit_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, "sit");
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 SIT link
406  * @arg link Link object
407  *
408  * @return True if link is a SIT link, otherwise false is returned.
409  */
410 int rtnl_link_is_sit(struct rtnl_link *link)
411 {
412  return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "sit");
413 }
414 
415 /**
416  * Create a new sit tunnel device
417  * @arg sock netlink socket
418  * @arg name name of the tunnel device
419  *
420  * Creates a new sit tunnel device in the kernel
421  * @return 0 on success or a negative error code
422  */
423 int rtnl_link_sit_add(struct nl_sock *sk, const char *name)
424 {
425  struct rtnl_link *link;
426  int err;
427 
428  link = rtnl_link_sit_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 
441 /**
442  * Set SIT tunnel interface index
443  * @arg link Link object
444  * @arg index interface index
445  *
446  * @return 0 on success or a negative error code
447  */
448 int rtnl_link_sit_set_link(struct rtnl_link *link, uint32_t index)
449 {
450  IS_SIT_LINK_ASSERT(link, sit);
451 
452  sit->link = index;
453  sit->sit_mask |= SIT_ATTR_LINK;
454 
455  return 0;
456 }
457 
458 /**
459  * Get SIT tunnel interface index
460  * @arg link Link object
461  *
462  * @return interface index value
463  */
464 uint32_t rtnl_link_sit_get_link(struct rtnl_link *link)
465 {
466  IS_SIT_LINK_ASSERT(link, sit);
467 
468  return sit->link;
469 }
470 
471 /**
472  * Set SIT tunnel local address
473  * @arg link Link object
474  * @arg addr local address
475  *
476  * @return 0 on success or a negative error code
477  */
478 int rtnl_link_sit_set_local(struct rtnl_link *link, uint32_t addr)
479 {
480  IS_SIT_LINK_ASSERT(link, sit);
481 
482  sit->local = addr;
483  sit->sit_mask |= SIT_ATTR_LOCAL;
484 
485  return 0;
486 }
487 
488 /**
489  * Get SIT tunnel local address
490  * @arg link Link object
491  *
492  * @return local address value
493  */
494 uint32_t rtnl_link_sit_get_local(struct rtnl_link *link)
495 {
496  IS_SIT_LINK_ASSERT(link, sit);
497 
498  return sit->local;
499 }
500 
501 /**
502  * Set SIT tunnel remote address
503  * @arg link Link object
504  * @arg remote remote address
505  *
506  * @return 0 on success or a negative error code
507  */
508 int rtnl_link_sit_set_remote(struct rtnl_link *link, uint32_t addr)
509 {
510  IS_SIT_LINK_ASSERT(link, sit);
511 
512  sit->remote = addr;
513  sit->sit_mask |= SIT_ATTR_REMOTE;
514 
515  return 0;
516 }
517 
518 /**
519  * Get SIT tunnel remote address
520  * @arg link Link object
521  *
522  * @return remote address
523  */
524 uint32_t rtnl_link_sit_get_remote(struct rtnl_link *link)
525 {
526  IS_SIT_LINK_ASSERT(link, sit);
527 
528  return sit->remote;
529 }
530 
531 /**
532  * Set SIT tunnel ttl
533  * @arg link Link object
534  * @arg ttl tunnel ttl
535  *
536  * @return 0 on success or a negative error code
537  */
538 int rtnl_link_sit_set_ttl(struct rtnl_link *link, uint8_t ttl)
539 {
540  IS_SIT_LINK_ASSERT(link, sit);
541 
542  sit->ttl = ttl;
543  sit->sit_mask |= SIT_ATTR_TTL;
544 
545  return 0;
546 }
547 
548 /**
549  * Get SIT tunnel ttl
550  * @arg link Link object
551  *
552  * @return ttl value
553  */
554 uint8_t rtnl_link_sit_get_ttl(struct rtnl_link *link)
555 {
556  IS_SIT_LINK_ASSERT(link, sit);
557 
558  return sit->ttl;
559 }
560 
561 /**
562  * Set SIT tunnel tos
563  * @arg link Link object
564  * @arg tos tunnel tos
565  *
566  * @return 0 on success or a negative error code
567  */
568 int rtnl_link_sit_set_tos(struct rtnl_link *link, uint8_t tos)
569 {
570  IS_SIT_LINK_ASSERT(link, sit);
571 
572  sit->tos = tos;
573  sit->sit_mask |= SIT_ATTR_TOS;
574 
575  return 0;
576 }
577 
578 /**
579  * Get SIT tunnel tos
580  * @arg link Link object
581  *
582  * @return tos value
583  */
584 uint8_t rtnl_link_sit_get_tos(struct rtnl_link *link)
585 {
586  IS_SIT_LINK_ASSERT(link, sit);
587 
588  return sit->tos;
589 }
590 
591 /**
592  * Set SIT tunnel path MTU discovery
593  * @arg link Link object
594  * @arg pmtudisc path MTU discovery
595  *
596  * @return 0 on success or a negative error code
597  */
598 int rtnl_link_sit_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
599 {
600  IS_SIT_LINK_ASSERT(link, sit);
601 
602  sit->pmtudisc = pmtudisc;
603  sit->sit_mask |= SIT_ATTR_PMTUDISC;
604 
605  return 0;
606 }
607 
608 /**
609  * Get SIT path MTU discovery
610  * @arg link Link object
611  *
612  * @return pmtudisc value
613  */
615 {
616  IS_SIT_LINK_ASSERT(link, sit);
617 
618  return sit->pmtudisc;
619 }
620 
621 /**
622  * Set SIT tunnel flags
623  * @arg link Link object
624  * @arg flags tunnel flags
625  *
626  * @return 0 on success or a negative error code
627  */
628 int rtnl_link_sit_set_flags(struct rtnl_link *link, uint16_t flags)
629 {
630  IS_SIT_LINK_ASSERT(link, sit);
631 
632  sit->flags = flags;
633  sit->sit_mask |= SIT_ATTR_FLAGS;
634 
635  return 0;
636 }
637 
638 /**
639  * Get SIT path flags
640  * @arg link Link object
641  *
642  * @return flags value
643  */
644 uint16_t rtnl_link_sit_get_flags(struct rtnl_link *link)
645 {
646  IS_SIT_LINK_ASSERT(link, sit);
647 
648  return sit->flags;
649 }
650 
651 /**
652  * Set SIT tunnel proto
653  * @arg link Link object
654  * @arg proto tunnel proto
655  *
656  * @return 0 on success or a negative error code
657  */
658 int rtnl_link_sit_set_proto(struct rtnl_link *link, uint8_t proto)
659 {
660  IS_SIT_LINK_ASSERT(link, sit);
661 
662  sit->proto = proto;
663  sit->sit_mask |= SIT_ATTR_PROTO;
664 
665  return 0;
666 }
667 
668 /**
669  * Get SIT proto
670  * @arg link Link object
671  *
672  * @return proto value
673  */
674 uint8_t rtnl_link_sit_get_proto(struct rtnl_link *link)
675 {
676  IS_SIT_LINK_ASSERT(link, sit);
677 
678  return sit->proto;
679 }
680 
681 /**
682  * Set ip6rd prefix
683  * @arg link Link object
684  * @arg prefix The IPv6 prefix
685  *
686  * @return 0 on success or an error code.
687  */
688 int rtnl_link_sit_set_ip6rd_prefix(struct rtnl_link *link, const struct in6_addr *prefix)
689 {
690  IS_SIT_LINK_ASSERT(link, sit);
691 
692  sit->ip6rd_prefix = *prefix;
693  sit->sit_mask |= SIT_ATTR_6RD_PREFIX;
694  return 0;
695 }
696 
697 /**
698  * Get ip6rd prefix
699  * @arg link Link object
700  * @arg prefix The output IPv6 prefix
701  *
702  * @return 0 on success or an error code. If the property is unset,
703  * this call fails too.
704  */
705 int rtnl_link_sit_get_ip6rd_prefix(const struct rtnl_link *link, struct in6_addr *prefix)
706 {
707  IS_SIT_LINK_ASSERT(link, sit);
708 
709  if (!(sit->sit_mask & SIT_ATTR_6RD_PREFIX))
710  return -NLE_NOATTR;
711 
712  if (prefix)
713  *prefix = sit->ip6rd_prefix;
714  return 0;
715 }
716 
717 /**
718  * Set ip6rd prefix length
719  * @arg link Link object
720  * @arg prefixlen The IPv6 prefix length
721  *
722  * @return 0 on success or an error code.
723  */
724 int rtnl_link_sit_set_ip6rd_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
725 {
726  IS_SIT_LINK_ASSERT(link, sit);
727 
728  sit->sit_mask |= SIT_ATTR_6RD_PREFIXLEN;
729  sit->ip6rd_prefixlen = prefixlen;
730  return 0;
731 }
732 
733 /**
734  * Get ip6rd prefix length
735  * @arg link Link object
736  * @arg prefixlen Output pointer for the prefix length
737  *
738  * @return 0 on success or an error code. If the property is unset,
739  * this call fails.
740  */
741 int rtnl_link_sit_get_ip6rd_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
742 {
743  IS_SIT_LINK_ASSERT(link, sit);
744 
745  if (!(sit->sit_mask & SIT_ATTR_6RD_PREFIXLEN))
746  return -NLE_NOATTR;
747 
748  if (prefixlen)
749  *prefixlen = sit->ip6rd_prefixlen;
750  return 0;
751 }
752 
753 /**
754  * Set ip6rd relay prefix
755  * @arg link Link object
756  * @arg prefix The IPv6 prefix length
757  *
758  * @return 0 on success or an error code.
759  */
760 int rtnl_link_sit_set_ip6rd_relay_prefix(struct rtnl_link *link, uint32_t prefix)
761 {
762  IS_SIT_LINK_ASSERT(link, sit);
763 
764  sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIX;
765  sit->ip6rd_relay_prefix = prefix;
766  return 0;
767 }
768 
769 /**
770  * Get ip6rd prefix length
771  * @arg link Link object
772  * @arg prefixlen Output pointer for the prefix length
773  *
774  * @return 0 on success or an error code. If the property is unset,
775  * this call fails.
776  */
777 int rtnl_link_sit_get_ip6rd_relay_prefix(const struct rtnl_link *link, uint32_t *prefix)
778 {
779  IS_SIT_LINK_ASSERT(link, sit);
780 
781  if (!(sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX))
782  return -NLE_NOATTR;
783 
784  if (prefix)
785  *prefix = sit->ip6rd_relay_prefix;
786  return 0;
787 }
788 
789 /**
790  * Set ip6rd relay prefix length
791  * @arg link Link object
792  * @arg prefixlen The IPv6 prefix length
793  *
794  * @return 0 on success or an error code.
795  */
796 int rtnl_link_sit_set_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
797 {
798  IS_SIT_LINK_ASSERT(link, sit);
799 
800  sit->sit_mask |= SIT_ATTR_6RD_RELAY_PREFIXLEN;
801  sit->ip6rd_relay_prefixlen = prefixlen;
802  return 0;
803 }
804 
805 /**
806  * Get ip6rd relay prefix length
807  * @arg link Link object
808  * @arg prefixlen Output pointer for the prefix length
809  *
810  * @return 0 on success or an error code. If the property is unset,
811  * this call fails.
812  */
813 int rtnl_link_sit_get_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
814 {
815  IS_SIT_LINK_ASSERT(link, sit);
816 
817  if (!(sit->sit_mask & SIT_ATTR_6RD_RELAY_PREFIX))
818  return -NLE_NOATTR;
819 
820  if (prefixlen)
821  *prefixlen = sit->ip6rd_relay_prefixlen;
822  return 0;
823 }
824 
825 /**
826  * Set SIT tunnel fwmark
827  * @arg link Link object
828  * @arg fwmark fwmark
829  *
830  * @return 0 on success or a negative error code
831  */
832 int rtnl_link_sit_set_fwmark(struct rtnl_link *link, uint32_t fwmark)
833 {
834  IS_SIT_LINK_ASSERT(link, sit);
835 
836  sit->fwmark = fwmark;
837  sit->sit_mask |= SIT_ATTR_FWMARK;
838 
839  return 0;
840 }
841 
842 /**
843  * Get SIT tunnel fwmark
844  * @arg link Link object
845  * @arg fwmark addr to fill in with the fwmark
846  *
847  * @return 0 on success or a negative error code
848  */
849 int rtnl_link_sit_get_fwmark(struct rtnl_link *link, uint32_t *fwmark)
850 {
851  IS_SIT_LINK_ASSERT(link, sit);
852 
853  if (!(sit->sit_mask & SIT_ATTR_FWMARK))
854  return -NLE_NOATTR;
855 
856  *fwmark = sit->fwmark;
857 
858  return 0;
859 }
860 
861 static void __init sit_init(void)
862 {
863  rtnl_link_register_info(&sit_info_ops);
864 }
865 
866 static void __exit sit_exit(void)
867 {
868  rtnl_link_unregister_info(&sit_info_ops);
869 }
uint32_t nla_get_u32(const struct nlattr *nla)
Return payload of 32 bit integer attribute.
Definition: attr.c:699
uint16_t nla_get_u16(const struct nlattr *nla)
Return payload of 16 bit integer attribute.
Definition: attr.c:649
#define NLA_PUT_U16(msg, attrtype, value)
Add 16 bit integer attribute to netlink message.
Definition: attr.h:212
#define NLA_PUT_U8(msg, attrtype, value)
Add 8 bit integer attribute to netlink message.
Definition: attr.h:194
#define NLA_PUT(msg, attrtype, attrlen, data)
Add unspecific attribute to netlink message.
Definition: attr.h:159
#define NLA_PUT_U32(msg, attrtype, value)
Add 32 bit integer attribute to netlink message.
Definition: attr.h:230
uint8_t nla_get_u8(const struct nlattr *nla)
Return value of 8 bit integer attribute.
Definition: attr.c:599
int nla_memcpy(void *dest, const struct nlattr *src, int count)
Copy attribute payload to another memory area.
Definition: attr.c:346
struct nlattr * nla_nest_start(struct nl_msg *msg, int attrtype)
Start a new level of nested attributes.
Definition: attr.c:895
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:1013
int nla_nest_end(struct nl_msg *msg, struct nlattr *start)
Finalize nesting of attributes.
Definition: attr.c:958
@ NLA_U8
8 bit integer
Definition: attr.h:35
@ NLA_U16
16 bit integer
Definition: attr.h:36
@ NLA_U32
32 bit integer
Definition: attr.h:37
uint8_t rtnl_link_sit_get_proto(struct rtnl_link *link)
Get SIT proto.
Definition: sit.c:674
int rtnl_link_sit_set_local(struct rtnl_link *link, uint32_t addr)
Set SIT tunnel local address.
Definition: sit.c:478
int rtnl_link_sit_set_ip6rd_relay_prefix(struct rtnl_link *link, uint32_t prefix)
Set ip6rd relay prefix.
Definition: sit.c:760
int rtnl_link_sit_set_ip6rd_prefix(struct rtnl_link *link, const struct in6_addr *prefix)
Set ip6rd prefix.
Definition: sit.c:688
int rtnl_link_sit_set_remote(struct rtnl_link *link, uint32_t addr)
Set SIT tunnel remote address.
Definition: sit.c:508
int rtnl_link_sit_set_tos(struct rtnl_link *link, uint8_t tos)
Set SIT tunnel tos.
Definition: sit.c:568
int rtnl_link_sit_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
Set SIT tunnel path MTU discovery.
Definition: sit.c:598
int rtnl_link_sit_set_flags(struct rtnl_link *link, uint16_t flags)
Set SIT tunnel flags.
Definition: sit.c:628
int rtnl_link_sit_get_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
Get ip6rd relay prefix length.
Definition: sit.c:813
int rtnl_link_is_sit(struct rtnl_link *link)
Check if link is a SIT link.
Definition: sit.c:410
int rtnl_link_sit_get_ip6rd_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
Get ip6rd prefix length.
Definition: sit.c:741
uint8_t rtnl_link_sit_get_tos(struct rtnl_link *link)
Get SIT tunnel tos.
Definition: sit.c:584
uint16_t rtnl_link_sit_get_flags(struct rtnl_link *link)
Get SIT path flags.
Definition: sit.c:644
int rtnl_link_sit_add(struct nl_sock *sk, const char *name)
Create a new sit tunnel device.
Definition: sit.c:423
int rtnl_link_sit_get_fwmark(struct rtnl_link *link, uint32_t *fwmark)
Get SIT tunnel fwmark.
Definition: sit.c:849
uint8_t rtnl_link_sit_get_ttl(struct rtnl_link *link)
Get SIT tunnel ttl.
Definition: sit.c:554
int rtnl_link_sit_set_fwmark(struct rtnl_link *link, uint32_t fwmark)
Set SIT tunnel fwmark.
Definition: sit.c:832
int rtnl_link_sit_get_ip6rd_prefix(const struct rtnl_link *link, struct in6_addr *prefix)
Get ip6rd prefix.
Definition: sit.c:705
int rtnl_link_sit_set_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
Set ip6rd relay prefix length.
Definition: sit.c:796
int rtnl_link_sit_set_ttl(struct rtnl_link *link, uint8_t ttl)
Set SIT tunnel ttl.
Definition: sit.c:538
int rtnl_link_sit_set_link(struct rtnl_link *link, uint32_t index)
Set SIT tunnel interface index.
Definition: sit.c:448
int rtnl_link_sit_set_ip6rd_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
Set ip6rd prefix length.
Definition: sit.c:724
uint32_t rtnl_link_sit_get_local(struct rtnl_link *link)
Get SIT tunnel local address.
Definition: sit.c:494
int rtnl_link_sit_set_proto(struct rtnl_link *link, uint8_t proto)
Set SIT tunnel proto.
Definition: sit.c:658
uint8_t rtnl_link_sit_get_pmtudisc(struct rtnl_link *link)
Get SIT path MTU discovery.
Definition: sit.c:614
int rtnl_link_sit_get_ip6rd_relay_prefix(const struct rtnl_link *link, uint32_t *prefix)
Get ip6rd prefix length.
Definition: sit.c:777
uint32_t rtnl_link_sit_get_remote(struct rtnl_link *link)
Get SIT tunnel remote address.
Definition: sit.c:524
uint32_t rtnl_link_sit_get_link(struct rtnl_link *link)
Get SIT tunnel interface index.
Definition: sit.c:464
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:955
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28
Attribute validation policy.
Definition: attr.h:63
uint16_t type
Type of attribute or NLA_UNSPEC.
Definition: attr.h:65
Definition: sit.c:44