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

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 */
614 uint8_t rtnl_link_sit_get_pmtudisc(struct rtnl_link *link)
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 }
nla_get_u32
uint32_t nla_get_u32(const struct nlattr *nla)
Return payload of 32 bit integer attribute.
Definition: attr.c:699
nla_get_u16
uint16_t nla_get_u16(const struct nlattr *nla)
Return payload of 16 bit integer attribute.
Definition: attr.c:649
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
#define NLA_PUT(msg, attrtype, attrlen, data)
Add unspecific attribute to netlink message.
Definition: attr.h:159
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:599
nla_memcpy
int nla_memcpy(void *dest, const struct nlattr *src, int count)
Copy attribute payload to another memory area.
Definition: attr.c:346
nla_nest_start
struct nlattr * nla_nest_start(struct nl_msg *msg, int attrtype)
Start a new level of nested attributes.
Definition: attr.c:895
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:1013
nla_nest_end
int nla_nest_end(struct nl_msg *msg, struct nlattr *start)
Finalize nesting of attributes.
Definition: attr.c:958
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_register_info
int rtnl_link_register_info(struct rtnl_link_info_ops *ops)
Register operations for a link info type.
Definition: api.c:124
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:159
rtnl_link_add
int rtnl_link_add(struct nl_sock *sk, struct rtnl_link *link, int flags)
Add virtual link.
Definition: link.c:1684
rtnl_link_get_name
char * rtnl_link_get_name(struct rtnl_link *link)
Return name of link object.
Definition: link.c:1952
rtnl_link_set_name
void rtnl_link_set_name(struct rtnl_link *link, const char *name)
Set name of link object.
Definition: link.c:1938
rtnl_link_put
void rtnl_link_put(struct rtnl_link *link)
Return a link object reference.
Definition: link.c:1919
rtnl_link_set_type
int rtnl_link_set_type(struct rtnl_link *link, const char *type)
Set type of link object.
Definition: link.c:2548
rtnl_link_alloc
struct rtnl_link * rtnl_link_alloc(void)
Allocate link object.
Definition: link.c:1910
rtnl_link_sit_get_proto
uint8_t rtnl_link_sit_get_proto(struct rtnl_link *link)
Get SIT proto.
Definition: sit.c:674
rtnl_link_sit_set_local
int rtnl_link_sit_set_local(struct rtnl_link *link, uint32_t addr)
Set SIT tunnel local address.
Definition: sit.c:478
rtnl_link_sit_set_ip6rd_relay_prefix
int rtnl_link_sit_set_ip6rd_relay_prefix(struct rtnl_link *link, uint32_t prefix)
Set ip6rd relay prefix.
Definition: sit.c:760
rtnl_link_sit_set_ip6rd_prefix
int rtnl_link_sit_set_ip6rd_prefix(struct rtnl_link *link, const struct in6_addr *prefix)
Set ip6rd prefix.
Definition: sit.c:688
rtnl_link_sit_set_remote
int rtnl_link_sit_set_remote(struct rtnl_link *link, uint32_t addr)
Set SIT tunnel remote address.
Definition: sit.c:508
rtnl_link_sit_set_tos
int rtnl_link_sit_set_tos(struct rtnl_link *link, uint8_t tos)
Set SIT tunnel tos.
Definition: sit.c:568
rtnl_link_sit_set_pmtudisc
int rtnl_link_sit_set_pmtudisc(struct rtnl_link *link, uint8_t pmtudisc)
Set SIT tunnel path MTU discovery.
Definition: sit.c:598
rtnl_link_sit_set_flags
int rtnl_link_sit_set_flags(struct rtnl_link *link, uint16_t flags)
Set SIT tunnel flags.
Definition: sit.c:628
rtnl_link_sit_get_ip6rd_relay_prefixlen
int rtnl_link_sit_get_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
Get ip6rd relay prefix length.
Definition: sit.c:813
rtnl_link_is_sit
int rtnl_link_is_sit(struct rtnl_link *link)
Check if link is a SIT link.
Definition: sit.c:410
rtnl_link_sit_get_ip6rd_prefixlen
int rtnl_link_sit_get_ip6rd_prefixlen(struct rtnl_link *link, uint16_t *prefixlen)
Get ip6rd prefix length.
Definition: sit.c:741
rtnl_link_sit_get_tos
uint8_t rtnl_link_sit_get_tos(struct rtnl_link *link)
Get SIT tunnel tos.
Definition: sit.c:584
rtnl_link_sit_get_flags
uint16_t rtnl_link_sit_get_flags(struct rtnl_link *link)
Get SIT path flags.
Definition: sit.c:644
rtnl_link_sit_add
int rtnl_link_sit_add(struct nl_sock *sk, const char *name)
Create a new sit tunnel device.
Definition: sit.c:423
rtnl_link_sit_get_fwmark
int rtnl_link_sit_get_fwmark(struct rtnl_link *link, uint32_t *fwmark)
Get SIT tunnel fwmark.
Definition: sit.c:849
rtnl_link_sit_get_ttl
uint8_t rtnl_link_sit_get_ttl(struct rtnl_link *link)
Get SIT tunnel ttl.
Definition: sit.c:554
rtnl_link_sit_set_fwmark
int rtnl_link_sit_set_fwmark(struct rtnl_link *link, uint32_t fwmark)
Set SIT tunnel fwmark.
Definition: sit.c:832
rtnl_link_sit_get_ip6rd_prefix
int rtnl_link_sit_get_ip6rd_prefix(const struct rtnl_link *link, struct in6_addr *prefix)
Get ip6rd prefix.
Definition: sit.c:705
rtnl_link_sit_set_ip6rd_relay_prefixlen
int rtnl_link_sit_set_ip6rd_relay_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
Set ip6rd relay prefix length.
Definition: sit.c:796
rtnl_link_sit_set_ttl
int rtnl_link_sit_set_ttl(struct rtnl_link *link, uint8_t ttl)
Set SIT tunnel ttl.
Definition: sit.c:538
rtnl_link_sit_set_link
int rtnl_link_sit_set_link(struct rtnl_link *link, uint32_t index)
Set SIT tunnel interface index.
Definition: sit.c:448
rtnl_link_sit_set_ip6rd_prefixlen
int rtnl_link_sit_set_ip6rd_prefixlen(struct rtnl_link *link, uint16_t prefixlen)
Set ip6rd prefix length.
Definition: sit.c:724
rtnl_link_sit_get_local
uint32_t rtnl_link_sit_get_local(struct rtnl_link *link)
Get SIT tunnel local address.
Definition: sit.c:494
rtnl_link_sit_set_proto
int rtnl_link_sit_set_proto(struct rtnl_link *link, uint8_t proto)
Set SIT tunnel proto.
Definition: sit.c:658
rtnl_link_sit_get_pmtudisc
uint8_t rtnl_link_sit_get_pmtudisc(struct rtnl_link *link)
Get SIT path MTU discovery.
Definition: sit.c:614
rtnl_link_sit_get_ip6rd_relay_prefix
int rtnl_link_sit_get_ip6rd_relay_prefix(const struct rtnl_link *link, uint32_t *prefix)
Get ip6rd prefix length.
Definition: sit.c:777
rtnl_link_sit_get_remote
uint32_t rtnl_link_sit_get_remote(struct rtnl_link *link)
Get SIT tunnel remote address.
Definition: sit.c:524
rtnl_link_sit_get_link
uint32_t rtnl_link_sit_get_link(struct rtnl_link *link)
Get SIT tunnel interface index.
Definition: sit.c:464
nl_dump
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:955
NL_DUMP_LINE
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
NL_DUMP_DETAILS
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
nl_dump_params
Dumping parameters.
Definition: types.h:28
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
Link object.
sit_info
Definition: sit.c:44