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Merge pull request #5710 from opensourcerouting/fix_centos6
[mirror_frr.git] / lib / if.c
1 /*
2 * Interface functions.
3 * Copyright (C) 1997, 98 Kunihiro Ishiguro
4 *
5 * This file is part of GNU Zebra.
6 *
7 * GNU Zebra is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; either version 2, or (at your
10 * option) any later version.
11 *
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <zebra.h>
23
24 #include "linklist.h"
25 #include "vector.h"
26 #include "lib_errors.h"
27 #include "vty.h"
28 #include "command.h"
29 #include "vrf.h"
30 #include "if.h"
31 #include "sockunion.h"
32 #include "prefix.h"
33 #include "memory.h"
34 #include "table.h"
35 #include "buffer.h"
36 #include "log.h"
37 #include "northbound_cli.h"
38 #ifndef VTYSH_EXTRACT_PL
39 #include "lib/if_clippy.c"
40 #endif
41
42 DEFINE_MTYPE_STATIC(LIB, IF, "Interface")
43 DEFINE_MTYPE_STATIC(LIB, CONNECTED, "Connected")
44 DEFINE_MTYPE_STATIC(LIB, NBR_CONNECTED, "Neighbor Connected")
45 DEFINE_MTYPE(LIB, CONNECTED_LABEL, "Connected interface label")
46 DEFINE_MTYPE_STATIC(LIB, IF_LINK_PARAMS, "Informational Link Parameters")
47
48 static struct interface *if_lookup_by_ifindex(ifindex_t ifindex,
49 vrf_id_t vrf_id);
50 static int if_cmp_func(const struct interface *, const struct interface *);
51 static int if_cmp_index_func(const struct interface *ifp1,
52 const struct interface *ifp2);
53 RB_GENERATE(if_name_head, interface, name_entry, if_cmp_func);
54 RB_GENERATE(if_index_head, interface, index_entry, if_cmp_index_func);
55
56 DEFINE_QOBJ_TYPE(interface)
57
58 DEFINE_HOOK(if_add, (struct interface * ifp), (ifp))
59 DEFINE_KOOH(if_del, (struct interface * ifp), (ifp))
60
61 static struct interface_master{
62 int (*create_hook)(struct interface *ifp);
63 int (*up_hook)(struct interface *ifp);
64 int (*down_hook)(struct interface *ifp);
65 int (*destroy_hook)(struct interface *ifp);
66 } ifp_master = { 0, };
67
68 /* Compare interface names, returning an integer greater than, equal to, or
69 * less than 0, (following the strcmp convention), according to the
70 * relationship between ifp1 and ifp2. Interface names consist of an
71 * alphabetic prefix and a numeric suffix. The primary sort key is
72 * lexicographic by name, and then numeric by number. No number sorts
73 * before all numbers. Examples: de0 < de1, de100 < fxp0 < xl0, devpty <
74 * devpty0, de0 < del0
75 */
76 int if_cmp_name_func(const char *p1, const char *p2)
77 {
78 unsigned int l1, l2;
79 long int x1, x2;
80 int res;
81
82 while (*p1 && *p2) {
83 /* look up to any number */
84 l1 = strcspn(p1, "0123456789");
85 l2 = strcspn(p2, "0123456789");
86
87 /* name lengths are different -> compare names */
88 if (l1 != l2)
89 return (strcmp(p1, p2));
90
91 /* Note that this relies on all numbers being less than all
92 * letters, so
93 * that de0 < del0.
94 */
95 res = strncmp(p1, p2, l1);
96
97 /* names are different -> compare them */
98 if (res)
99 return res;
100
101 /* with identical name part, go to numeric part */
102 p1 += l1;
103 p2 += l1;
104
105 if (!*p1 && !*p2)
106 return 0;
107 if (!*p1)
108 return -1;
109 if (!*p2)
110 return 1;
111
112 x1 = strtol(p1, (char **)&p1, 10);
113 x2 = strtol(p2, (char **)&p2, 10);
114
115 /* let's compare numbers now */
116 if (x1 < x2)
117 return -1;
118 if (x1 > x2)
119 return 1;
120
121 /* numbers were equal, lets do it again..
122 (it happens with name like "eth123.456:789") */
123 }
124 if (*p1)
125 return 1;
126 if (*p2)
127 return -1;
128 return 0;
129 }
130
131 static int if_cmp_func(const struct interface *ifp1,
132 const struct interface *ifp2)
133 {
134 return if_cmp_name_func(ifp1->name, ifp2->name);
135 }
136
137 static int if_cmp_index_func(const struct interface *ifp1,
138 const struct interface *ifp2)
139 {
140 if (ifp1->ifindex == ifp2->ifindex)
141 return 0;
142 else if (ifp1->ifindex > ifp2->ifindex)
143 return 1;
144 else
145 return -1;
146 }
147
148 static void ifp_connected_free(void *arg)
149 {
150 struct connected *c = arg;
151
152 connected_free(&c);
153 }
154
155 /* Create new interface structure. */
156 static struct interface *if_new(vrf_id_t vrf_id)
157 {
158 struct interface *ifp;
159
160 ifp = XCALLOC(MTYPE_IF, sizeof(struct interface));
161
162 ifp->ifindex = IFINDEX_INTERNAL;
163 ifp->name[0] = '\0';
164
165 ifp->vrf_id = vrf_id;
166
167 ifp->connected = list_new();
168 ifp->connected->del = ifp_connected_free;
169
170 ifp->nbr_connected = list_new();
171 ifp->nbr_connected->del = (void (*)(void *))nbr_connected_free;
172
173 /* Enable Link-detection by default */
174 SET_FLAG(ifp->status, ZEBRA_INTERFACE_LINKDETECTION);
175
176 QOBJ_REG(ifp, interface);
177 return ifp;
178 }
179
180 void if_new_via_zapi(struct interface *ifp)
181 {
182 if (ifp_master.create_hook)
183 (*ifp_master.create_hook)(ifp);
184 }
185
186 void if_destroy_via_zapi(struct interface *ifp)
187 {
188 if (ifp_master.destroy_hook)
189 (*ifp_master.destroy_hook)(ifp);
190
191 if_set_index(ifp, IFINDEX_INTERNAL);
192 if (!ifp->configured)
193 if_delete(&ifp);
194 }
195
196 void if_up_via_zapi(struct interface *ifp)
197 {
198 if (ifp_master.up_hook)
199 (*ifp_master.up_hook)(ifp);
200 }
201
202 void if_down_via_zapi(struct interface *ifp)
203 {
204 if (ifp_master.down_hook)
205 (*ifp_master.down_hook)(ifp);
206 }
207
208 struct interface *if_create_name(const char *name, vrf_id_t vrf_id)
209 {
210 struct interface *ifp;
211
212 ifp = if_new(vrf_id);
213
214 if_set_name(ifp, name);
215
216 hook_call(if_add, ifp);
217 return ifp;
218 }
219
220 struct interface *if_create_ifindex(ifindex_t ifindex, vrf_id_t vrf_id)
221 {
222 struct interface *ifp;
223
224 ifp = if_new(vrf_id);
225
226 if_set_index(ifp, ifindex);
227
228 hook_call(if_add, ifp);
229 return ifp;
230 }
231
232 /* Create new interface structure. */
233 void if_update_to_new_vrf(struct interface *ifp, vrf_id_t vrf_id)
234 {
235 struct vrf *old_vrf, *vrf;
236
237 /* remove interface from old master vrf list */
238 old_vrf = vrf_lookup_by_id(ifp->vrf_id);
239 if (old_vrf) {
240 if (ifp->name[0] != '\0')
241 IFNAME_RB_REMOVE(old_vrf, ifp);
242
243 if (ifp->ifindex != IFINDEX_INTERNAL)
244 IFINDEX_RB_REMOVE(old_vrf, ifp);
245 }
246
247 ifp->vrf_id = vrf_id;
248 vrf = vrf_get(ifp->vrf_id, NULL);
249
250 if (ifp->name[0] != '\0')
251 IFNAME_RB_INSERT(vrf, ifp);
252
253 if (ifp->ifindex != IFINDEX_INTERNAL)
254 IFINDEX_RB_INSERT(vrf, ifp);
255
256 /*
257 * HACK: Change the interface VRF in the running configuration directly,
258 * bypassing the northbound layer. This is necessary to avoid deleting
259 * the interface and readding it in the new VRF, which would have
260 * several implications.
261 */
262 if (yang_module_find("frr-interface")) {
263 struct lyd_node *if_dnode;
264
265 if_dnode = yang_dnode_get(
266 running_config->dnode,
267 "/frr-interface:lib/interface[name='%s'][vrf='%s']/vrf",
268 ifp->name, old_vrf->name);
269 if (if_dnode) {
270 nb_running_unset_entry(if_dnode->parent);
271 yang_dnode_change_leaf(if_dnode, vrf->name);
272 nb_running_set_entry(if_dnode->parent, ifp);
273 running_config->version++;
274 }
275 }
276 }
277
278
279 /* Delete interface structure. */
280 void if_delete_retain(struct interface *ifp)
281 {
282 hook_call(if_del, ifp);
283 QOBJ_UNREG(ifp);
284
285 /* Free connected address list */
286 list_delete_all_node(ifp->connected);
287
288 /* Free connected nbr address list */
289 list_delete_all_node(ifp->nbr_connected);
290 }
291
292 /* Delete and free interface structure. */
293 void if_delete(struct interface **ifp)
294 {
295 struct interface *ptr = *ifp;
296 struct vrf *vrf;
297
298 vrf = vrf_lookup_by_id(ptr->vrf_id);
299 assert(vrf);
300
301 IFNAME_RB_REMOVE(vrf, ptr);
302 if (ptr->ifindex != IFINDEX_INTERNAL)
303 IFINDEX_RB_REMOVE(vrf, ptr);
304
305 if_delete_retain(ptr);
306
307 list_delete(&ptr->connected);
308 list_delete(&ptr->nbr_connected);
309
310 if_link_params_free(ptr);
311
312 XFREE(MTYPE_TMP, ptr->desc);
313
314 XFREE(MTYPE_IF, ptr);
315 *ifp = NULL;
316 }
317
318 /* Used only internally to check within VRF only */
319 static struct interface *if_lookup_by_ifindex(ifindex_t ifindex,
320 vrf_id_t vrf_id)
321 {
322 struct vrf *vrf;
323 struct interface if_tmp;
324
325 vrf = vrf_lookup_by_id(vrf_id);
326 if (!vrf)
327 return NULL;
328
329 if_tmp.ifindex = ifindex;
330 return RB_FIND(if_index_head, &vrf->ifaces_by_index, &if_tmp);
331 }
332
333 /* Interface existance check by index. */
334 struct interface *if_lookup_by_index(ifindex_t ifindex, vrf_id_t vrf_id)
335 {
336 switch (vrf_get_backend()) {
337 case VRF_BACKEND_UNKNOWN:
338 case VRF_BACKEND_NETNS:
339 return(if_lookup_by_ifindex(ifindex, vrf_id));
340 case VRF_BACKEND_VRF_LITE:
341 return(if_lookup_by_index_all_vrf(ifindex));
342 }
343 return NULL;
344 }
345
346 const char *ifindex2ifname(ifindex_t ifindex, vrf_id_t vrf_id)
347 {
348 struct interface *ifp;
349
350 return ((ifp = if_lookup_by_index(ifindex, vrf_id)) != NULL)
351 ? ifp->name
352 : "unknown";
353 }
354
355 ifindex_t ifname2ifindex(const char *name, vrf_id_t vrf_id)
356 {
357 struct interface *ifp;
358
359 return ((ifp = if_lookup_by_name(name, vrf_id)) != NULL)
360 ? ifp->ifindex
361 : IFINDEX_INTERNAL;
362 }
363
364 /* Interface existance check by interface name. */
365 struct interface *if_lookup_by_name(const char *name, vrf_id_t vrf_id)
366 {
367 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
368 struct interface if_tmp;
369
370 if (!vrf || !name
371 || strnlen(name, INTERFACE_NAMSIZ) == INTERFACE_NAMSIZ)
372 return NULL;
373
374 strlcpy(if_tmp.name, name, sizeof(if_tmp.name));
375 return RB_FIND(if_name_head, &vrf->ifaces_by_name, &if_tmp);
376 }
377
378 struct interface *if_lookup_by_name_all_vrf(const char *name)
379 {
380 struct vrf *vrf;
381 struct interface *ifp;
382
383 if (!name || strnlen(name, INTERFACE_NAMSIZ) == INTERFACE_NAMSIZ)
384 return NULL;
385
386 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
387 ifp = if_lookup_by_name(name, vrf->vrf_id);
388 if (ifp)
389 return ifp;
390 }
391
392 return NULL;
393 }
394
395 struct interface *if_lookup_by_index_all_vrf(ifindex_t ifindex)
396 {
397 struct vrf *vrf;
398 struct interface *ifp;
399
400 if (ifindex == IFINDEX_INTERNAL)
401 return NULL;
402
403 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
404 ifp = if_lookup_by_ifindex(ifindex, vrf->vrf_id);
405 if (ifp)
406 return ifp;
407 }
408
409 return NULL;
410 }
411
412 /* Lookup interface by IP address. */
413 struct interface *if_lookup_exact_address(void *src, int family,
414 vrf_id_t vrf_id)
415 {
416 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
417 struct listnode *cnode;
418 struct interface *ifp;
419 struct prefix *p;
420 struct connected *c;
421
422 FOR_ALL_INTERFACES (vrf, ifp) {
423 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
424 p = c->address;
425
426 if (p && (p->family == family)) {
427 if (family == AF_INET) {
428 if (IPV4_ADDR_SAME(
429 &p->u.prefix4,
430 (struct in_addr *)src))
431 return ifp;
432 } else if (family == AF_INET6) {
433 if (IPV6_ADDR_SAME(
434 &p->u.prefix6,
435 (struct in6_addr *)src))
436 return ifp;
437 }
438 }
439 }
440 }
441 return NULL;
442 }
443
444 /* Lookup interface by IP address. */
445 struct connected *if_lookup_address(void *matchaddr, int family,
446 vrf_id_t vrf_id)
447 {
448 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
449 struct prefix addr;
450 int bestlen = 0;
451 struct listnode *cnode;
452 struct interface *ifp;
453 struct connected *c;
454 struct connected *match;
455
456 if (family == AF_INET) {
457 addr.family = AF_INET;
458 addr.u.prefix4 = *((struct in_addr *)matchaddr);
459 addr.prefixlen = IPV4_MAX_BITLEN;
460 } else if (family == AF_INET6) {
461 addr.family = AF_INET6;
462 addr.u.prefix6 = *((struct in6_addr *)matchaddr);
463 addr.prefixlen = IPV6_MAX_BITLEN;
464 }
465
466 match = NULL;
467
468 FOR_ALL_INTERFACES (vrf, ifp) {
469 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
470 if (c->address && (c->address->family == AF_INET)
471 && prefix_match(CONNECTED_PREFIX(c), &addr)
472 && (c->address->prefixlen > bestlen)) {
473 bestlen = c->address->prefixlen;
474 match = c;
475 }
476 }
477 }
478 return match;
479 }
480
481 /* Lookup interface by prefix */
482 struct interface *if_lookup_prefix(struct prefix *prefix, vrf_id_t vrf_id)
483 {
484 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
485 struct listnode *cnode;
486 struct interface *ifp;
487 struct connected *c;
488
489 FOR_ALL_INTERFACES (vrf, ifp) {
490 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
491 if (prefix_cmp(c->address, prefix) == 0) {
492 return ifp;
493 }
494 }
495 }
496 return NULL;
497 }
498
499 size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
500 struct interface ***result, vrf_id_t vrf_id)
501 {
502 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
503
504 struct list *rs = list_new();
505 struct interface *ifp;
506
507 FOR_ALL_INTERFACES (vrf, ifp) {
508 if (ifp->hw_addr_len == (int)addrsz
509 && !memcmp(hw_addr, ifp->hw_addr, addrsz))
510 listnode_add(rs, ifp);
511 }
512
513 if (rs->count) {
514 *result = XCALLOC(MTYPE_TMP,
515 sizeof(struct interface *) * rs->count);
516 list_to_array(rs, (void **)*result, rs->count);
517 }
518
519 int count = rs->count;
520
521 list_delete(&rs);
522
523 return count;
524 }
525
526
527 /* Get interface by name if given name interface doesn't exist create
528 one. */
529 struct interface *if_get_by_name(const char *name, vrf_id_t vrf_id)
530 {
531 struct interface *ifp;
532
533 switch (vrf_get_backend()) {
534 case VRF_BACKEND_UNKNOWN:
535 case VRF_BACKEND_NETNS:
536 ifp = if_lookup_by_name(name, vrf_id);
537 if (ifp)
538 return ifp;
539 return if_create_name(name, vrf_id);
540 case VRF_BACKEND_VRF_LITE:
541 ifp = if_lookup_by_name_all_vrf(name);
542 if (ifp) {
543 if (ifp->vrf_id == vrf_id)
544 return ifp;
545 /* If it came from the kernel or by way of zclient,
546 * believe it and update the ifp accordingly.
547 */
548 if_update_to_new_vrf(ifp, vrf_id);
549 return ifp;
550 }
551 return if_create_name(name, vrf_id);
552 }
553
554 return NULL;
555 }
556
557 struct interface *if_get_by_ifindex(ifindex_t ifindex, vrf_id_t vrf_id)
558 {
559 struct interface *ifp;
560
561 switch (vrf_get_backend()) {
562 case VRF_BACKEND_UNKNOWN:
563 case VRF_BACKEND_NETNS:
564 ifp = if_lookup_by_ifindex(ifindex, vrf_id);
565 if (ifp)
566 return ifp;
567 return if_create_ifindex(ifindex, vrf_id);
568 case VRF_BACKEND_VRF_LITE:
569 ifp = if_lookup_by_index_all_vrf(ifindex);
570 if (ifp) {
571 if (ifp->vrf_id == vrf_id)
572 return ifp;
573 /* If it came from the kernel or by way of zclient,
574 * believe it and update the ifp accordingly.
575 */
576 if_update_to_new_vrf(ifp, vrf_id);
577 return ifp;
578 }
579 return if_create_ifindex(ifindex, vrf_id);
580 }
581
582 return NULL;
583 }
584
585 void if_set_index(struct interface *ifp, ifindex_t ifindex)
586 {
587 struct vrf *vrf;
588
589 vrf = vrf_get(ifp->vrf_id, NULL);
590 assert(vrf);
591
592 if (ifp->ifindex == ifindex)
593 return;
594
595 if (ifp->ifindex != IFINDEX_INTERNAL)
596 IFINDEX_RB_REMOVE(vrf, ifp);
597
598 ifp->ifindex = ifindex;
599
600 if (ifp->ifindex != IFINDEX_INTERNAL)
601 IFINDEX_RB_INSERT(vrf, ifp)
602 }
603
604 void if_set_name(struct interface *ifp, const char *name)
605 {
606 struct vrf *vrf;
607
608 vrf = vrf_get(ifp->vrf_id, NULL);
609 assert(vrf);
610
611 if (if_cmp_name_func(ifp->name, name) == 0)
612 return;
613
614 if (ifp->name[0] != '\0')
615 IFNAME_RB_REMOVE(vrf, ifp);
616
617 strlcpy(ifp->name, name, sizeof(ifp->name));
618
619 if (ifp->name[0] != '\0')
620 IFNAME_RB_INSERT(vrf, ifp);
621 }
622
623 /* Does interface up ? */
624 int if_is_up(const struct interface *ifp)
625 {
626 return ifp->flags & IFF_UP;
627 }
628
629 /* Is interface running? */
630 int if_is_running(const struct interface *ifp)
631 {
632 return ifp->flags & IFF_RUNNING;
633 }
634
635 /* Is the interface operative, eg. either UP & RUNNING
636 or UP & !ZEBRA_INTERFACE_LINK_DETECTION and
637 if ptm checking is enabled, then ptm check has passed */
638 int if_is_operative(const struct interface *ifp)
639 {
640 return ((ifp->flags & IFF_UP)
641 && (((ifp->flags & IFF_RUNNING)
642 && (ifp->ptm_status || !ifp->ptm_enable))
643 || !CHECK_FLAG(ifp->status,
644 ZEBRA_INTERFACE_LINKDETECTION)));
645 }
646
647 /* Is the interface operative, eg. either UP & RUNNING
648 or UP & !ZEBRA_INTERFACE_LINK_DETECTION, without PTM check */
649 int if_is_no_ptm_operative(const struct interface *ifp)
650 {
651 return ((ifp->flags & IFF_UP)
652 && ((ifp->flags & IFF_RUNNING)
653 || !CHECK_FLAG(ifp->status,
654 ZEBRA_INTERFACE_LINKDETECTION)));
655 }
656
657 /* Is this loopback interface ? */
658 int if_is_loopback(const struct interface *ifp)
659 {
660 /* XXX: Do this better, eg what if IFF_WHATEVER means X on platform M
661 * but Y on platform N?
662 */
663 return (ifp->flags & (IFF_LOOPBACK | IFF_NOXMIT | IFF_VIRTUAL));
664 }
665
666 /* Check interface is VRF */
667 int if_is_vrf(const struct interface *ifp)
668 {
669 return CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_VRF_LOOPBACK);
670 }
671
672 bool if_is_loopback_or_vrf(const struct interface *ifp)
673 {
674 if (if_is_loopback(ifp) || if_is_vrf(ifp))
675 return true;
676
677 return false;
678 }
679
680 /* Does this interface support broadcast ? */
681 int if_is_broadcast(const struct interface *ifp)
682 {
683 return ifp->flags & IFF_BROADCAST;
684 }
685
686 /* Does this interface support broadcast ? */
687 int if_is_pointopoint(const struct interface *ifp)
688 {
689 return ifp->flags & IFF_POINTOPOINT;
690 }
691
692 /* Does this interface support multicast ? */
693 int if_is_multicast(const struct interface *ifp)
694 {
695 return ifp->flags & IFF_MULTICAST;
696 }
697
698 /* Printout flag information into log */
699 const char *if_flag_dump(unsigned long flag)
700 {
701 int separator = 0;
702 static char logbuf[BUFSIZ];
703
704 #define IFF_OUT_LOG(X, STR) \
705 if (flag & (X)) { \
706 if (separator) \
707 strlcat(logbuf, ",", sizeof(logbuf)); \
708 else \
709 separator = 1; \
710 strlcat(logbuf, STR, sizeof(logbuf)); \
711 }
712
713 strlcpy(logbuf, "<", BUFSIZ);
714 IFF_OUT_LOG(IFF_UP, "UP");
715 IFF_OUT_LOG(IFF_BROADCAST, "BROADCAST");
716 IFF_OUT_LOG(IFF_DEBUG, "DEBUG");
717 IFF_OUT_LOG(IFF_LOOPBACK, "LOOPBACK");
718 IFF_OUT_LOG(IFF_POINTOPOINT, "POINTOPOINT");
719 IFF_OUT_LOG(IFF_NOTRAILERS, "NOTRAILERS");
720 IFF_OUT_LOG(IFF_RUNNING, "RUNNING");
721 IFF_OUT_LOG(IFF_NOARP, "NOARP");
722 IFF_OUT_LOG(IFF_PROMISC, "PROMISC");
723 IFF_OUT_LOG(IFF_ALLMULTI, "ALLMULTI");
724 IFF_OUT_LOG(IFF_OACTIVE, "OACTIVE");
725 IFF_OUT_LOG(IFF_SIMPLEX, "SIMPLEX");
726 IFF_OUT_LOG(IFF_LINK0, "LINK0");
727 IFF_OUT_LOG(IFF_LINK1, "LINK1");
728 IFF_OUT_LOG(IFF_LINK2, "LINK2");
729 IFF_OUT_LOG(IFF_MULTICAST, "MULTICAST");
730 IFF_OUT_LOG(IFF_NOXMIT, "NOXMIT");
731 IFF_OUT_LOG(IFF_NORTEXCH, "NORTEXCH");
732 IFF_OUT_LOG(IFF_VIRTUAL, "VIRTUAL");
733 IFF_OUT_LOG(IFF_IPV4, "IPv4");
734 IFF_OUT_LOG(IFF_IPV6, "IPv6");
735
736 strlcat(logbuf, ">", sizeof(logbuf));
737
738 return logbuf;
739 #undef IFF_OUT_LOG
740 }
741
742 /* For debugging */
743 static void if_dump(const struct interface *ifp)
744 {
745 struct listnode *node;
746 struct connected *c __attribute__((unused));
747
748 for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, c))
749 zlog_info(
750 "Interface %s vrf %u index %d metric %d mtu %d "
751 "mtu6 %d %s",
752 ifp->name, ifp->vrf_id, ifp->ifindex, ifp->metric,
753 ifp->mtu, ifp->mtu6, if_flag_dump(ifp->flags));
754 }
755
756 /* Interface printing for all interface. */
757 void if_dump_all(void)
758 {
759 struct vrf *vrf;
760 void *ifp;
761
762 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id)
763 FOR_ALL_INTERFACES (vrf, ifp)
764 if_dump(ifp);
765 }
766
767 #ifdef SUNOS_5
768 /* Need to handle upgrade from SUNWzebra to Quagga. SUNWzebra created
769 * a seperate struct interface for each logical interface, so config
770 * file may be full of 'interface fooX:Y'. Solaris however does not
771 * expose logical interfaces via PF_ROUTE, so trying to track logical
772 * interfaces can be fruitless, for that reason Quagga only tracks
773 * the primary IP interface.
774 *
775 * We try accomodate SUNWzebra by:
776 * - looking up the interface name, to see whether it exists, if so
777 * its useable
778 * - for protocol daemons, this could only because zebra told us of
779 * the interface
780 * - for zebra, only because it learnt from kernel
781 * - if not:
782 * - search the name to see if it contains a sub-ipif / logical interface
783 * seperator, the ':' char. If it does:
784 * - text up to that char must be the primary name - get that name.
785 * if not:
786 * - no idea, just get the name in its entirety.
787 */
788 static struct interface *if_sunwzebra_get(const char *name, vrf_id_t vrf_id)
789 {
790 struct interface *ifp;
791 char *cp;
792
793 if ((ifp = if_lookup_by_name(name, vrf_id)) != NULL)
794 return ifp;
795
796 /* hunt the primary interface name... */
797 cp = strchr(name, ':');
798 if (cp)
799 *cp = '\0';
800
801 return if_get_by_name(name, vrf_id);
802 }
803 #endif /* SUNOS_5 */
804
805 #if 0
806 /* For debug purpose. */
807 DEFUN (show_address,
808 show_address_cmd,
809 "show address [vrf NAME]",
810 SHOW_STR
811 "address\n"
812 VRF_CMD_HELP_STR)
813 {
814 int idx_vrf = 3;
815 struct listnode *node;
816 struct interface *ifp;
817 struct connected *ifc;
818 struct prefix *p;
819 vrf_id_t vrf_id = VRF_DEFAULT;
820
821 if (argc > 2)
822 VRF_GET_ID (vrf_id, argv[idx_vrf]->arg);
823
824 FOR_ALL_INTERFACES (vrf, ifp)
825 {
826 for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
827 {
828 p = ifc->address;
829
830 if (p->family == AF_INET)
831 vty_out (vty, "%s/%d\n", inet_ntoa (p->u.prefix4), p->prefixlen);
832 }
833 }
834 return CMD_SUCCESS;
835 }
836
837 DEFUN (show_address_vrf_all,
838 show_address_vrf_all_cmd,
839 "show address vrf all",
840 SHOW_STR
841 "address\n"
842 VRF_ALL_CMD_HELP_STR)
843 {
844 struct vrf *vrf;
845 struct listnode *node;
846 struct interface *ifp;
847 struct connected *ifc;
848 struct prefix *p;
849
850 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
851 {
852 if (RB_EMPTY (if_name_head, &vrf->ifaces_by_name))
853 continue;
854
855 vty_out (vty, "\nVRF %u\n\n", vrf->vrf_id);
856
857 FOR_ALL_INTERFACES (vrf, ifp)
858 {
859 for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
860 {
861 p = ifc->address;
862
863 if (p->family == AF_INET)
864 vty_out (vty, "%s/%d\n", inet_ntoa (p->u.prefix4), p->prefixlen);
865 }
866 }
867 }
868 return CMD_SUCCESS;
869 }
870 #endif
871
872 /* Allocate connected structure. */
873 struct connected *connected_new(void)
874 {
875 return XCALLOC(MTYPE_CONNECTED, sizeof(struct connected));
876 }
877
878 /* Allocate nbr connected structure. */
879 struct nbr_connected *nbr_connected_new(void)
880 {
881 return XCALLOC(MTYPE_NBR_CONNECTED, sizeof(struct nbr_connected));
882 }
883
884 /* Free connected structure. */
885 void connected_free(struct connected **connected)
886 {
887 struct connected *ptr = *connected;
888
889 if (ptr->address)
890 prefix_free(&ptr->address);
891
892 if (ptr->destination)
893 prefix_free(&ptr->destination);
894
895 XFREE(MTYPE_CONNECTED_LABEL, ptr->label);
896
897 XFREE(MTYPE_CONNECTED, ptr);
898 *connected = NULL;
899 }
900
901 /* Free nbr connected structure. */
902 void nbr_connected_free(struct nbr_connected *connected)
903 {
904 if (connected->address)
905 prefix_free(&connected->address);
906
907 XFREE(MTYPE_NBR_CONNECTED, connected);
908 }
909
910 /* If same interface nbr address already exists... */
911 struct nbr_connected *nbr_connected_check(struct interface *ifp,
912 struct prefix *p)
913 {
914 struct nbr_connected *ifc;
915 struct listnode *node;
916
917 for (ALL_LIST_ELEMENTS_RO(ifp->nbr_connected, node, ifc))
918 if (prefix_same(ifc->address, p))
919 return ifc;
920
921 return NULL;
922 }
923
924 /* Print if_addr structure. */
925 static void __attribute__((unused))
926 connected_log(struct connected *connected, char *str)
927 {
928 struct prefix *p;
929 struct interface *ifp;
930 char logbuf[BUFSIZ];
931 char buf[BUFSIZ];
932
933 ifp = connected->ifp;
934 p = connected->address;
935
936 snprintf(logbuf, BUFSIZ, "%s interface %s vrf %u %s %s/%d ", str,
937 ifp->name, ifp->vrf_id, prefix_family_str(p),
938 inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen);
939
940 p = connected->destination;
941 if (p) {
942 strncat(logbuf, inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ),
943 BUFSIZ - strlen(logbuf));
944 }
945 zlog_info("%s", logbuf);
946 }
947
948 /* Print if_addr structure. */
949 static void __attribute__((unused))
950 nbr_connected_log(struct nbr_connected *connected, char *str)
951 {
952 struct prefix *p;
953 struct interface *ifp;
954 char logbuf[BUFSIZ];
955 char buf[BUFSIZ];
956
957 ifp = connected->ifp;
958 p = connected->address;
959
960 snprintf(logbuf, BUFSIZ, "%s interface %s %s %s/%d ", str, ifp->name,
961 prefix_family_str(p),
962 inet_ntop(p->family, &p->u.prefix, buf, BUFSIZ), p->prefixlen);
963
964 zlog_info("%s", logbuf);
965 }
966
967 /* If two connected address has same prefix return 1. */
968 static int connected_same_prefix(struct prefix *p1, struct prefix *p2)
969 {
970 if (p1->family == p2->family) {
971 if (p1->family == AF_INET
972 && IPV4_ADDR_SAME(&p1->u.prefix4, &p2->u.prefix4))
973 return 1;
974 if (p1->family == AF_INET6
975 && IPV6_ADDR_SAME(&p1->u.prefix6, &p2->u.prefix6))
976 return 1;
977 }
978 return 0;
979 }
980
981 /* count the number of connected addresses that are in the given family */
982 unsigned int connected_count_by_family(struct interface *ifp, int family)
983 {
984 struct listnode *cnode;
985 struct connected *connected;
986 unsigned int cnt = 0;
987
988 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected))
989 if (connected->address->family == family)
990 cnt++;
991
992 return cnt;
993 }
994
995 struct connected *connected_lookup_prefix_exact(struct interface *ifp,
996 struct prefix *p)
997 {
998 struct listnode *node;
999 struct listnode *next;
1000 struct connected *ifc;
1001
1002 for (node = listhead(ifp->connected); node; node = next) {
1003 ifc = listgetdata(node);
1004 next = node->next;
1005
1006 if (connected_same_prefix(ifc->address, p))
1007 return ifc;
1008 }
1009 return NULL;
1010 }
1011
1012 struct connected *connected_delete_by_prefix(struct interface *ifp,
1013 struct prefix *p)
1014 {
1015 struct listnode *node;
1016 struct listnode *next;
1017 struct connected *ifc;
1018
1019 /* In case of same prefix come, replace it with new one. */
1020 for (node = listhead(ifp->connected); node; node = next) {
1021 ifc = listgetdata(node);
1022 next = node->next;
1023
1024 if (connected_same_prefix(ifc->address, p)) {
1025 listnode_delete(ifp->connected, ifc);
1026 return ifc;
1027 }
1028 }
1029 return NULL;
1030 }
1031
1032 /* Find the address on our side that will be used when packets
1033 are sent to dst. */
1034 struct connected *connected_lookup_prefix(struct interface *ifp,
1035 struct prefix *addr)
1036 {
1037 struct listnode *cnode;
1038 struct connected *c;
1039 struct connected *match;
1040
1041 match = NULL;
1042
1043 for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
1044 if (c->address && (c->address->family == addr->family)
1045 && prefix_match(CONNECTED_PREFIX(c), addr)
1046 && (!match
1047 || (c->address->prefixlen > match->address->prefixlen)))
1048 match = c;
1049 }
1050 return match;
1051 }
1052
1053 struct connected *connected_add_by_prefix(struct interface *ifp,
1054 struct prefix *p,
1055 struct prefix *destination)
1056 {
1057 struct connected *ifc;
1058
1059 /* Allocate new connected address. */
1060 ifc = connected_new();
1061 ifc->ifp = ifp;
1062
1063 /* Fetch interface address */
1064 ifc->address = prefix_new();
1065 memcpy(ifc->address, p, sizeof(struct prefix));
1066
1067 /* Fetch dest address */
1068 if (destination) {
1069 ifc->destination = prefix_new();
1070 memcpy(ifc->destination, destination, sizeof(struct prefix));
1071 }
1072
1073 /* Add connected address to the interface. */
1074 listnode_add(ifp->connected, ifc);
1075 return ifc;
1076 }
1077
1078 struct connected *connected_get_linklocal(struct interface *ifp)
1079 {
1080 struct listnode *n;
1081 struct connected *c = NULL;
1082
1083 for (ALL_LIST_ELEMENTS_RO(ifp->connected, n, c)) {
1084 if (c->address->family == AF_INET6
1085 && IN6_IS_ADDR_LINKLOCAL(&c->address->u.prefix6))
1086 break;
1087 }
1088 return c;
1089 }
1090
1091 #if 0 /* this route_table of struct connected's is unused \
1092 * however, it would be good to use a route_table rather than \
1093 * a list.. \
1094 */
1095 /* Interface looking up by interface's address. */
1096 /* Interface's IPv4 address reverse lookup table. */
1097 struct route_table *ifaddr_ipv4_table;
1098 /* struct route_table *ifaddr_ipv6_table; */
1099
1100 static void
1101 ifaddr_ipv4_add (struct in_addr *ifaddr, struct interface *ifp)
1102 {
1103 struct route_node *rn;
1104 struct prefix_ipv4 p;
1105
1106 p.family = AF_INET;
1107 p.prefixlen = IPV4_MAX_PREFIXLEN;
1108 p.prefix = *ifaddr;
1109
1110 rn = route_node_get (ifaddr_ipv4_table, (struct prefix *) &p);
1111 if (rn)
1112 {
1113 route_unlock_node (rn);
1114 zlog_info ("ifaddr_ipv4_add(): address %s is already added",
1115 inet_ntoa (*ifaddr));
1116 return;
1117 }
1118 rn->info = ifp;
1119 }
1120
1121 static void
1122 ifaddr_ipv4_delete (struct in_addr *ifaddr, struct interface *ifp)
1123 {
1124 struct route_node *rn;
1125 struct prefix_ipv4 p;
1126
1127 p.family = AF_INET;
1128 p.prefixlen = IPV4_MAX_PREFIXLEN;
1129 p.prefix = *ifaddr;
1130
1131 rn = route_node_lookup (ifaddr_ipv4_table, (struct prefix *) &p);
1132 if (! rn)
1133 {
1134 zlog_info ("ifaddr_ipv4_delete(): can't find address %s",
1135 inet_ntoa (*ifaddr));
1136 return;
1137 }
1138 rn->info = NULL;
1139 route_unlock_node (rn);
1140 route_unlock_node (rn);
1141 }
1142
1143 /* Lookup interface by interface's IP address or interface index. */
1144 static struct interface *
1145 ifaddr_ipv4_lookup (struct in_addr *addr, ifindex_t ifindex)
1146 {
1147 struct prefix_ipv4 p;
1148 struct route_node *rn;
1149 struct interface *ifp;
1150
1151 if (addr)
1152 {
1153 p.family = AF_INET;
1154 p.prefixlen = IPV4_MAX_PREFIXLEN;
1155 p.prefix = *addr;
1156
1157 rn = route_node_lookup (ifaddr_ipv4_table, (struct prefix *) &p);
1158 if (! rn)
1159 return NULL;
1160
1161 ifp = rn->info;
1162 route_unlock_node (rn);
1163 return ifp;
1164 }
1165 else
1166 return if_lookup_by_index(ifindex, VRF_DEFAULT);
1167 }
1168 #endif /* ifaddr_ipv4_table */
1169
1170 void if_terminate(struct vrf *vrf)
1171 {
1172 struct interface *ifp;
1173
1174 while (!RB_EMPTY(if_name_head, &vrf->ifaces_by_name)) {
1175 ifp = RB_ROOT(if_name_head, &vrf->ifaces_by_name);
1176
1177 if (ifp->node) {
1178 ifp->node->info = NULL;
1179 route_unlock_node(ifp->node);
1180 }
1181 if_delete(&ifp);
1182 }
1183 }
1184
1185 const char *if_link_type_str(enum zebra_link_type llt)
1186 {
1187 switch (llt) {
1188 #define llts(T,S) case (T): return (S)
1189 llts(ZEBRA_LLT_UNKNOWN, "Unknown");
1190 llts(ZEBRA_LLT_ETHER, "Ethernet");
1191 llts(ZEBRA_LLT_EETHER, "Experimental Ethernet");
1192 llts(ZEBRA_LLT_AX25, "AX.25 Level 2");
1193 llts(ZEBRA_LLT_PRONET, "PROnet token ring");
1194 llts(ZEBRA_LLT_IEEE802, "IEEE 802.2 Ethernet/TR/TB");
1195 llts(ZEBRA_LLT_ARCNET, "ARCnet");
1196 llts(ZEBRA_LLT_APPLETLK, "AppleTalk");
1197 llts(ZEBRA_LLT_DLCI, "Frame Relay DLCI");
1198 llts(ZEBRA_LLT_ATM, "ATM");
1199 llts(ZEBRA_LLT_METRICOM, "Metricom STRIP");
1200 llts(ZEBRA_LLT_IEEE1394, "IEEE 1394 IPv4");
1201 llts(ZEBRA_LLT_EUI64, "EUI-64");
1202 llts(ZEBRA_LLT_INFINIBAND, "InfiniBand");
1203 llts(ZEBRA_LLT_SLIP, "SLIP");
1204 llts(ZEBRA_LLT_CSLIP, "Compressed SLIP");
1205 llts(ZEBRA_LLT_SLIP6, "SLIPv6");
1206 llts(ZEBRA_LLT_CSLIP6, "Compressed SLIPv6");
1207 llts(ZEBRA_LLT_ROSE, "ROSE packet radio");
1208 llts(ZEBRA_LLT_X25, "CCITT X.25");
1209 llts(ZEBRA_LLT_PPP, "PPP");
1210 llts(ZEBRA_LLT_CHDLC, "Cisco HDLC");
1211 llts(ZEBRA_LLT_RAWHDLC, "Raw HDLC");
1212 llts(ZEBRA_LLT_LAPB, "LAPB");
1213 llts(ZEBRA_LLT_IPIP, "IPIP Tunnel");
1214 llts(ZEBRA_LLT_IPIP6, "IPIP6 Tunnel");
1215 llts(ZEBRA_LLT_FRAD, "FRAD");
1216 llts(ZEBRA_LLT_SKIP, "SKIP vif");
1217 llts(ZEBRA_LLT_LOOPBACK, "Loopback");
1218 llts(ZEBRA_LLT_LOCALTLK, "Localtalk");
1219 llts(ZEBRA_LLT_FDDI, "FDDI");
1220 llts(ZEBRA_LLT_SIT, "IPv6-in-IPv4 SIT");
1221 llts(ZEBRA_LLT_IPDDP, "IP-in-DDP tunnel");
1222 llts(ZEBRA_LLT_IPGRE, "GRE over IP");
1223 llts(ZEBRA_LLT_PIMREG, "PIMSM registration");
1224 llts(ZEBRA_LLT_HIPPI, "HiPPI");
1225 llts(ZEBRA_LLT_IRDA, "IrDA");
1226 llts(ZEBRA_LLT_FCPP, "Fibre-Channel PtP");
1227 llts(ZEBRA_LLT_FCAL, "Fibre-Channel Arbitrated Loop");
1228 llts(ZEBRA_LLT_FCPL, "Fibre-Channel Public Loop");
1229 llts(ZEBRA_LLT_FCFABRIC, "Fibre-Channel Fabric");
1230 llts(ZEBRA_LLT_IEEE802_TR, "IEEE 802.2 Token Ring");
1231 llts(ZEBRA_LLT_IEEE80211, "IEEE 802.11");
1232 llts(ZEBRA_LLT_IEEE80211_RADIOTAP, "IEEE 802.11 Radiotap");
1233 llts(ZEBRA_LLT_IEEE802154, "IEEE 802.15.4");
1234 llts(ZEBRA_LLT_IEEE802154_PHY, "IEEE 802.15.4 Phy");
1235 default:
1236 flog_err(EC_LIB_DEVELOPMENT, "Unknown value %d", llt);
1237 return "Unknown type!";
1238 #undef llts
1239 }
1240 return NULL;
1241 }
1242
1243 struct if_link_params *if_link_params_get(struct interface *ifp)
1244 {
1245 int i;
1246
1247 if (ifp->link_params != NULL)
1248 return ifp->link_params;
1249
1250 struct if_link_params *iflp =
1251 XCALLOC(MTYPE_IF_LINK_PARAMS, sizeof(struct if_link_params));
1252 if (iflp == NULL)
1253 return NULL;
1254
1255 /* Set TE metric equal to standard metric */
1256 iflp->te_metric = ifp->metric;
1257
1258 /* Compute default bandwidth based on interface */
1259 iflp->default_bw =
1260 ((ifp->bandwidth ? ifp->bandwidth : DEFAULT_BANDWIDTH)
1261 * TE_KILO_BIT / TE_BYTE);
1262
1263 /* Set Max, Reservable and Unreserved Bandwidth */
1264 iflp->max_bw = iflp->default_bw;
1265 iflp->max_rsv_bw = iflp->default_bw;
1266 for (i = 0; i < MAX_CLASS_TYPE; i++)
1267 iflp->unrsv_bw[i] = iflp->default_bw;
1268
1269 /* Update Link parameters status */
1270 iflp->lp_status =
1271 LP_TE_METRIC | LP_MAX_BW | LP_MAX_RSV_BW | LP_UNRSV_BW;
1272
1273 /* Finally attach newly created Link Parameters */
1274 ifp->link_params = iflp;
1275
1276 return iflp;
1277 }
1278
1279 void if_link_params_free(struct interface *ifp)
1280 {
1281 if (ifp->link_params == NULL)
1282 return;
1283 XFREE(MTYPE_IF_LINK_PARAMS, ifp->link_params);
1284 ifp->link_params = NULL;
1285 }
1286
1287 /* ----------- CLI commands ----------- */
1288
1289 /*
1290 * XPath: /frr-interface:lib/interface
1291 */
1292 DEFPY_NOSH (interface,
1293 interface_cmd,
1294 "interface IFNAME [vrf NAME$vrf_name]",
1295 "Select an interface to configure\n"
1296 "Interface's name\n"
1297 VRF_CMD_HELP_STR)
1298 {
1299 char xpath_list[XPATH_MAXLEN];
1300 vrf_id_t vrf_id;
1301 struct interface *ifp;
1302 int ret;
1303
1304 if (!vrf_name)
1305 vrf_name = VRF_DEFAULT_NAME;
1306
1307 /*
1308 * This command requires special handling to maintain backward
1309 * compatibility. If a VRF name is not specified, it means we're willing
1310 * to accept any interface with the given name on any VRF. If no
1311 * interface is found, then a new one should be created on the default
1312 * VRF.
1313 */
1314 VRF_GET_ID(vrf_id, vrf_name, false);
1315 ifp = if_lookup_by_name_all_vrf(ifname);
1316 if (ifp && ifp->vrf_id != vrf_id) {
1317 struct vrf *vrf;
1318
1319 /*
1320 * Special case 1: a VRF name was specified, but the found
1321 * interface is associated to different VRF. Reject the command.
1322 */
1323 if (vrf_id != VRF_DEFAULT) {
1324 vty_out(vty, "%% interface %s not in %s vrf\n", ifname,
1325 vrf_name);
1326 return CMD_WARNING_CONFIG_FAILED;
1327 }
1328
1329 /*
1330 * Special case 2: a VRF name was *not* specified, and the found
1331 * interface is associated to a VRF other than the default one.
1332 * Update vrf_id and vrf_name to account for that.
1333 */
1334 vrf = vrf_lookup_by_id(ifp->vrf_id);
1335 assert(vrf);
1336 vrf_id = ifp->vrf_id;
1337 vrf_name = vrf->name;
1338 }
1339
1340 snprintf(xpath_list, sizeof(xpath_list),
1341 "/frr-interface:lib/interface[name='%s'][vrf='%s']", ifname,
1342 vrf_name);
1343
1344 nb_cli_enqueue_change(vty, ".", NB_OP_CREATE, NULL);
1345 ret = nb_cli_apply_changes(vty, xpath_list);
1346 if (ret == CMD_SUCCESS) {
1347 VTY_PUSH_XPATH(INTERFACE_NODE, xpath_list);
1348
1349 /*
1350 * For backward compatibility with old commands we still need
1351 * to use the qobj infrastructure. This can be removed once
1352 * all interface-level commands are converted to the new
1353 * northbound model.
1354 */
1355 ifp = if_lookup_by_name(ifname, vrf_id);
1356 if (ifp)
1357 VTY_PUSH_CONTEXT(INTERFACE_NODE, ifp);
1358 }
1359
1360 return ret;
1361 }
1362
1363 DEFPY (no_interface,
1364 no_interface_cmd,
1365 "no interface IFNAME [vrf NAME$vrf_name]",
1366 NO_STR
1367 "Delete a pseudo interface's configuration\n"
1368 "Interface's name\n"
1369 VRF_CMD_HELP_STR)
1370 {
1371 if (!vrf_name)
1372 vrf_name = VRF_DEFAULT_NAME;
1373
1374 nb_cli_enqueue_change(vty, ".", NB_OP_DESTROY, NULL);
1375
1376 return nb_cli_apply_changes(
1377 vty, "/frr-interface:lib/interface[name='%s'][vrf='%s']",
1378 ifname, vrf_name);
1379 }
1380
1381 static void cli_show_interface(struct vty *vty, struct lyd_node *dnode,
1382 bool show_defaults)
1383 {
1384 const char *vrf;
1385
1386 vrf = yang_dnode_get_string(dnode, "./vrf");
1387
1388 vty_out(vty, "!\n");
1389 vty_out(vty, "interface %s", yang_dnode_get_string(dnode, "./name"));
1390 if (!strmatch(vrf, VRF_DEFAULT_NAME))
1391 vty_out(vty, " vrf %s", vrf);
1392 vty_out(vty, "\n");
1393 }
1394
1395 /*
1396 * XPath: /frr-interface:lib/interface/description
1397 */
1398 DEFPY (interface_desc,
1399 interface_desc_cmd,
1400 "description LINE...",
1401 "Interface specific description\n"
1402 "Characters describing this interface\n")
1403 {
1404 char *desc;
1405 int ret;
1406
1407 desc = argv_concat(argv, argc, 1);
1408 nb_cli_enqueue_change(vty, "./description", NB_OP_MODIFY, desc);
1409 ret = nb_cli_apply_changes(vty, NULL);
1410 XFREE(MTYPE_TMP, desc);
1411
1412 return ret;
1413 }
1414
1415 DEFPY (no_interface_desc,
1416 no_interface_desc_cmd,
1417 "no description",
1418 NO_STR
1419 "Interface specific description\n")
1420 {
1421 nb_cli_enqueue_change(vty, "./description", NB_OP_DESTROY, NULL);
1422
1423 return nb_cli_apply_changes(vty, NULL);
1424 }
1425
1426 static void cli_show_interface_desc(struct vty *vty, struct lyd_node *dnode,
1427 bool show_defaults)
1428 {
1429 vty_out(vty, " description %s\n", yang_dnode_get_string(dnode, NULL));
1430 }
1431
1432 /* Interface autocomplete. */
1433 static void if_autocomplete(vector comps, struct cmd_token *token)
1434 {
1435 struct interface *ifp;
1436 struct vrf *vrf;
1437
1438 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
1439 FOR_ALL_INTERFACES (vrf, ifp) {
1440 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, ifp->name));
1441 }
1442 }
1443 }
1444
1445 static const struct cmd_variable_handler if_var_handlers[] = {
1446 {/* "interface NAME" */
1447 .varname = "interface",
1448 .completions = if_autocomplete},
1449 {.tokenname = "IFNAME", .completions = if_autocomplete},
1450 {.tokenname = "INTERFACE", .completions = if_autocomplete},
1451 {.completions = NULL}};
1452
1453 void if_cmd_init(void)
1454 {
1455 cmd_variable_handler_register(if_var_handlers);
1456
1457 install_element(CONFIG_NODE, &interface_cmd);
1458 install_element(CONFIG_NODE, &no_interface_cmd);
1459
1460 install_default(INTERFACE_NODE);
1461 install_element(INTERFACE_NODE, &interface_desc_cmd);
1462 install_element(INTERFACE_NODE, &no_interface_desc_cmd);
1463 }
1464
1465 void if_zapi_callbacks(int (*create)(struct interface *ifp),
1466 int (*up)(struct interface *ifp),
1467 int (*down)(struct interface *ifp),
1468 int (*destroy)(struct interface *ifp))
1469 {
1470 ifp_master.create_hook = create;
1471 ifp_master.up_hook = up;
1472 ifp_master.down_hook = down;
1473 ifp_master.destroy_hook = destroy;
1474 }
1475
1476 /* ------- Northbound callbacks ------- */
1477
1478 /*
1479 * XPath: /frr-interface:lib/interface
1480 */
1481 static int lib_interface_create(enum nb_event event,
1482 const struct lyd_node *dnode,
1483 union nb_resource *resource)
1484 {
1485 const char *ifname;
1486 const char *vrfname;
1487 struct vrf *vrf;
1488 struct interface *ifp;
1489
1490 ifname = yang_dnode_get_string(dnode, "./name");
1491 vrfname = yang_dnode_get_string(dnode, "./vrf");
1492
1493 switch (event) {
1494 case NB_EV_VALIDATE:
1495 vrf = vrf_lookup_by_name(vrfname);
1496 if (!vrf) {
1497 zlog_warn("%s: VRF %s doesn't exist", __func__,
1498 vrfname);
1499 return NB_ERR_VALIDATION;
1500 }
1501 if (vrf->vrf_id == VRF_UNKNOWN) {
1502 zlog_warn("%s: VRF %s is not active", __func__,
1503 vrf->name);
1504 return NB_ERR_VALIDATION;
1505 }
1506
1507 /* if VRF is netns or not yet known - init for instance
1508 * then assumption is that passed config is exact
1509 * then the user intent was not to use an other iface
1510 */
1511 if (vrf_get_backend() == VRF_BACKEND_VRF_LITE) {
1512 ifp = if_lookup_by_name_all_vrf(ifname);
1513 if (ifp && ifp->vrf_id != vrf->vrf_id) {
1514 zlog_warn(
1515 "%s: interface %s already exists in another VRF",
1516 __func__, ifp->name);
1517 return NB_ERR_VALIDATION;
1518 }
1519 }
1520 break;
1521 case NB_EV_PREPARE:
1522 case NB_EV_ABORT:
1523 break;
1524 case NB_EV_APPLY:
1525 vrf = vrf_lookup_by_name(vrfname);
1526 assert(vrf);
1527 #ifdef SUNOS_5
1528 ifp = if_sunwzebra_get(ifname, vrf->vrf_id);
1529 #else
1530 ifp = if_get_by_name(ifname, vrf->vrf_id);
1531 #endif /* SUNOS_5 */
1532
1533 ifp->configured = true;
1534 nb_running_set_entry(dnode, ifp);
1535 break;
1536 }
1537
1538 return NB_OK;
1539 }
1540
1541 static int lib_interface_destroy(enum nb_event event,
1542 const struct lyd_node *dnode)
1543 {
1544 struct interface *ifp;
1545
1546
1547 switch (event) {
1548 case NB_EV_VALIDATE:
1549 ifp = nb_running_get_entry(dnode, NULL, true);
1550 if (CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE)) {
1551 zlog_warn("%s: only inactive interfaces can be deleted",
1552 __func__);
1553 return NB_ERR_VALIDATION;
1554 }
1555 break;
1556 case NB_EV_PREPARE:
1557 case NB_EV_ABORT:
1558 break;
1559 case NB_EV_APPLY:
1560 ifp = nb_running_unset_entry(dnode);
1561
1562 ifp->configured = false;
1563 if_delete(&ifp);
1564 break;
1565 }
1566
1567 return NB_OK;
1568 }
1569
1570 /*
1571 * XPath: /frr-interface:lib/interface
1572 */
1573 static const void *lib_interface_get_next(const void *parent_list_entry,
1574 const void *list_entry)
1575 {
1576 struct vrf *vrf;
1577 struct interface *pif = (struct interface *)list_entry;
1578
1579 if (list_entry == NULL) {
1580 vrf = RB_MIN(vrf_name_head, &vrfs_by_name);
1581 assert(vrf);
1582 pif = RB_MIN(if_name_head, &vrf->ifaces_by_name);
1583 } else {
1584 vrf = vrf_lookup_by_id(pif->vrf_id);
1585 pif = RB_NEXT(if_name_head, pif);
1586 /* if no more interfaces, switch to next vrf */
1587 while (pif == NULL) {
1588 vrf = RB_NEXT(vrf_name_head, vrf);
1589 if (!vrf)
1590 return NULL;
1591 pif = RB_MIN(if_name_head, &vrf->ifaces_by_name);
1592 }
1593 }
1594
1595 return pif;
1596 }
1597
1598 static int lib_interface_get_keys(const void *list_entry,
1599 struct yang_list_keys *keys)
1600 {
1601 const struct interface *ifp = list_entry;
1602
1603 struct vrf *vrf = vrf_lookup_by_id(ifp->vrf_id);
1604
1605 assert(vrf);
1606
1607 keys->num = 2;
1608 strlcpy(keys->key[0], ifp->name, sizeof(keys->key[0]));
1609 strlcpy(keys->key[1], vrf->name, sizeof(keys->key[1]));
1610
1611 return NB_OK;
1612 }
1613
1614 static const void *lib_interface_lookup_entry(const void *parent_list_entry,
1615 const struct yang_list_keys *keys)
1616 {
1617 const char *ifname = keys->key[0];
1618 const char *vrfname = keys->key[1];
1619 struct vrf *vrf = vrf_lookup_by_name(vrfname);
1620
1621 return vrf ? if_lookup_by_name(ifname, vrf->vrf_id) : NULL;
1622 }
1623
1624 /*
1625 * XPath: /frr-interface:lib/interface/description
1626 */
1627 static int lib_interface_description_modify(enum nb_event event,
1628 const struct lyd_node *dnode,
1629 union nb_resource *resource)
1630 {
1631 struct interface *ifp;
1632 const char *description;
1633
1634 if (event != NB_EV_APPLY)
1635 return NB_OK;
1636
1637 ifp = nb_running_get_entry(dnode, NULL, true);
1638 XFREE(MTYPE_TMP, ifp->desc);
1639 description = yang_dnode_get_string(dnode, NULL);
1640 ifp->desc = XSTRDUP(MTYPE_TMP, description);
1641
1642 return NB_OK;
1643 }
1644
1645 static int lib_interface_description_destroy(enum nb_event event,
1646 const struct lyd_node *dnode)
1647 {
1648 struct interface *ifp;
1649
1650 if (event != NB_EV_APPLY)
1651 return NB_OK;
1652
1653 ifp = nb_running_get_entry(dnode, NULL, true);
1654 XFREE(MTYPE_TMP, ifp->desc);
1655
1656 return NB_OK;
1657 }
1658
1659 /* clang-format off */
1660
1661 #if defined(__GNUC__) && ((__GNUC__ - 0) < 5) && !defined(__clang__)
1662 /* gcc versions before 5.x miscalculate the size for structs with variable
1663 * length arrays (they just count it as size 0)
1664 */
1665 struct frr_yang_module_info_size3 {
1666 /* YANG module name. */
1667 const char *name;
1668
1669 /* Northbound callbacks. */
1670 const struct {
1671 /* Data path of this YANG node. */
1672 const char *xpath;
1673
1674 /* Callbacks implemented for this node. */
1675 struct nb_callbacks cbs;
1676
1677 /* Priority - lower priorities are processed first. */
1678 uint32_t priority;
1679 } nodes[3];
1680 };
1681
1682 const struct frr_yang_module_info_size3 frr_interface_info_size3 asm("frr_interface_info") = {
1683 #else
1684 const struct frr_yang_module_info frr_interface_info = {
1685 #endif
1686 .name = "frr-interface",
1687 .nodes = {
1688 {
1689 .xpath = "/frr-interface:lib/interface",
1690 .cbs = {
1691 .create = lib_interface_create,
1692 .destroy = lib_interface_destroy,
1693 .cli_show = cli_show_interface,
1694 .get_next = lib_interface_get_next,
1695 .get_keys = lib_interface_get_keys,
1696 .lookup_entry = lib_interface_lookup_entry,
1697 },
1698 },
1699 {
1700 .xpath = "/frr-interface:lib/interface/description",
1701 .cbs = {
1702 .modify = lib_interface_description_modify,
1703 .destroy = lib_interface_description_destroy,
1704 .cli_show = cli_show_interface_desc,
1705 },
1706 },
1707 {
1708 .xpath = NULL,
1709 },
1710 }
1711 };
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