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Merge branch 'master' into frr-bgp_cli
[mirror_frr.git] / zebra / zapi_msg.c
1 /*
2 * Zebra API message creation & consumption.
3 * Portions:
4 * Copyright (C) 1997-1999 Kunihiro Ishiguro
5 * Copyright (C) 2015-2018 Cumulus Networks, Inc.
6 * et al.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; see the file COPYING; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <zebra.h>
24 #include <libgen.h>
25
26 #include "lib/prefix.h"
27 #include "lib/command.h"
28 #include "lib/if.h"
29 #include "lib/thread.h"
30 #include "lib/stream.h"
31 #include "lib/memory.h"
32 #include "lib/table.h"
33 #include "lib/network.h"
34 #include "lib/sockunion.h"
35 #include "lib/log.h"
36 #include "lib/zclient.h"
37 #include "lib/privs.h"
38 #include "lib/network.h"
39 #include "lib/buffer.h"
40 #include "lib/nexthop.h"
41 #include "lib/vrf.h"
42 #include "lib/libfrr.h"
43 #include "lib/sockopt.h"
44
45 #include "zebra/rib.h"
46 #include "zebra/zebra_memory.h"
47 #include "zebra/zebra_ns.h"
48 #include "zebra/zebra_vrf.h"
49 #include "zebra/router-id.h"
50 #include "zebra/redistribute.h"
51 #include "zebra/debug.h"
52 #include "zebra/zebra_rnh.h"
53 #include "zebra/rt_netlink.h"
54 #include "zebra/interface.h"
55 #include "zebra/zebra_ptm.h"
56 #include "zebra/rtadv.h"
57 #include "zebra/zebra_mpls.h"
58 #include "zebra/zebra_mroute.h"
59 #include "zebra/label_manager.h"
60 #include "zebra/zebra_vxlan.h"
61 #include "zebra/rt.h"
62 #include "zebra/zebra_pbr.h"
63 #include "zebra/table_manager.h"
64 #include "zebra/zapi_msg.h"
65 #include "zebra/zebra_errors.h"
66
67 /* Encoding helpers -------------------------------------------------------- */
68
69 static void zserv_encode_interface(struct stream *s, struct interface *ifp)
70 {
71 /* Interface information. */
72 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
73 stream_putl(s, ifp->ifindex);
74 stream_putc(s, ifp->status);
75 stream_putq(s, ifp->flags);
76 stream_putc(s, ifp->ptm_enable);
77 stream_putc(s, ifp->ptm_status);
78 stream_putl(s, ifp->metric);
79 stream_putl(s, ifp->speed);
80 stream_putl(s, ifp->mtu);
81 stream_putl(s, ifp->mtu6);
82 stream_putl(s, ifp->bandwidth);
83 stream_putl(s, ifp->ll_type);
84 stream_putl(s, ifp->hw_addr_len);
85 if (ifp->hw_addr_len)
86 stream_put(s, ifp->hw_addr, ifp->hw_addr_len);
87
88 /* Then, Traffic Engineering parameters if any */
89 if (HAS_LINK_PARAMS(ifp) && IS_LINK_PARAMS_SET(ifp->link_params)) {
90 stream_putc(s, 1);
91 zebra_interface_link_params_write(s, ifp);
92 } else
93 stream_putc(s, 0);
94
95 /* Write packet size. */
96 stream_putw_at(s, 0, stream_get_endp(s));
97 }
98
99 static void zserv_encode_vrf(struct stream *s, struct zebra_vrf *zvrf)
100 {
101 struct vrf_data data;
102 const char *netns_name = zvrf_ns_name(zvrf);
103
104 data.l.table_id = zvrf->table_id;
105
106 if (netns_name)
107 strlcpy(data.l.netns_name, basename((char *)netns_name),
108 NS_NAMSIZ);
109 else
110 memset(data.l.netns_name, 0, NS_NAMSIZ);
111 /* Pass the tableid and the netns NAME */
112 stream_put(s, &data, sizeof(struct vrf_data));
113 /* Interface information. */
114 stream_put(s, zvrf_name(zvrf), VRF_NAMSIZ);
115 /* Write packet size. */
116 stream_putw_at(s, 0, stream_get_endp(s));
117 }
118
119 static int zserv_encode_nexthop(struct stream *s, struct nexthop *nexthop)
120 {
121 stream_putc(s, nexthop->type);
122 switch (nexthop->type) {
123 case NEXTHOP_TYPE_IPV4:
124 case NEXTHOP_TYPE_IPV4_IFINDEX:
125 stream_put_in_addr(s, &nexthop->gate.ipv4);
126 stream_putl(s, nexthop->ifindex);
127 break;
128 case NEXTHOP_TYPE_IPV6:
129 stream_put(s, &nexthop->gate.ipv6, 16);
130 break;
131 case NEXTHOP_TYPE_IPV6_IFINDEX:
132 stream_put(s, &nexthop->gate.ipv6, 16);
133 stream_putl(s, nexthop->ifindex);
134 break;
135 case NEXTHOP_TYPE_IFINDEX:
136 stream_putl(s, nexthop->ifindex);
137 break;
138 default:
139 /* do nothing */
140 break;
141 }
142 return 1;
143 }
144
145 /* Send handlers ----------------------------------------------------------- */
146
147 /* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
148 /*
149 * This function is called in the following situations:
150 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
151 * from the client.
152 * - at startup, when zebra figures out the available interfaces
153 * - when an interface is added (where support for
154 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
155 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
156 * received)
157 */
158 int zsend_interface_add(struct zserv *client, struct interface *ifp)
159 {
160 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
161
162 zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf_id);
163 zserv_encode_interface(s, ifp);
164
165 client->ifadd_cnt++;
166 return zserv_send_message(client, s);
167 }
168
169 /* Interface deletion from zebra daemon. */
170 int zsend_interface_delete(struct zserv *client, struct interface *ifp)
171 {
172 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
173
174 zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf_id);
175 zserv_encode_interface(s, ifp);
176
177 client->ifdel_cnt++;
178 return zserv_send_message(client, s);
179 }
180
181 int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf)
182 {
183 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
184
185 zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf));
186 zserv_encode_vrf(s, zvrf);
187
188 client->vrfadd_cnt++;
189 return zserv_send_message(client, s);
190 }
191
192 /* VRF deletion from zebra daemon. */
193 int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf)
194
195 {
196 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
197
198 zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf));
199 zserv_encode_vrf(s, zvrf);
200
201 client->vrfdel_cnt++;
202 return zserv_send_message(client, s);
203 }
204
205 int zsend_interface_link_params(struct zserv *client, struct interface *ifp)
206 {
207 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
208
209 /* Check this client need interface information. */
210 if (!client->ifinfo) {
211 stream_free(s);
212 return 0;
213 }
214
215 if (!ifp->link_params) {
216 stream_free(s);
217 return 0;
218 }
219
220 zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->vrf_id);
221
222 /* Add Interface Index */
223 stream_putl(s, ifp->ifindex);
224
225 /* Then TE Link Parameters */
226 if (zebra_interface_link_params_write(s, ifp) == 0) {
227 stream_free(s);
228 return 0;
229 }
230
231 /* Write packet size. */
232 stream_putw_at(s, 0, stream_get_endp(s));
233
234 return zserv_send_message(client, s);
235 }
236
237 /* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or
238 * ZEBRA_INTERFACE_ADDRESS_DELETE to the client.
239 *
240 * A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations:
241 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
242 * from the client, after the ZEBRA_INTERFACE_ADD has been
243 * sent from zebra to the client
244 * - redistribute new address info to all clients in the following situations
245 * - at startup, when zebra figures out the available interfaces
246 * - when an interface is added (where support for
247 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
248 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
249 * received)
250 * - for the vty commands "ip address A.B.C.D/M [<secondary>|<label LINE>]"
251 * and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M"
252 * - when an RTM_NEWADDR message is received from the kernel,
253 *
254 * The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE:
255 *
256 * zsend_interface_address(DELETE)
257 * ^
258 * |
259 * zebra_interface_address_delete_update
260 * ^ ^ ^
261 * | | if_delete_update
262 * | |
263 * ip_address_uninstall connected_delete_ipv4
264 * [ipv6_addresss_uninstall] [connected_delete_ipv6]
265 * ^ ^
266 * | |
267 * | RTM_NEWADDR on routing/netlink socket
268 * |
269 * vty commands:
270 * "no ip address A.B.C.D/M [label LINE]"
271 * "no ip address A.B.C.D/M secondary"
272 * ["no ipv6 address X:X::X:X/M"]
273 *
274 */
275 int zsend_interface_address(int cmd, struct zserv *client,
276 struct interface *ifp, struct connected *ifc)
277 {
278 int blen;
279 struct prefix *p;
280 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
281
282 zclient_create_header(s, cmd, ifp->vrf_id);
283 stream_putl(s, ifp->ifindex);
284
285 /* Interface address flag. */
286 stream_putc(s, ifc->flags);
287
288 /* Prefix information. */
289 p = ifc->address;
290 stream_putc(s, p->family);
291 blen = prefix_blen(p);
292 stream_put(s, &p->u.prefix, blen);
293
294 /*
295 * XXX gnu version does not send prefixlen for
296 * ZEBRA_INTERFACE_ADDRESS_DELETE
297 * but zebra_interface_address_delete_read() in the gnu version
298 * expects to find it
299 */
300 stream_putc(s, p->prefixlen);
301
302 /* Destination. */
303 p = ifc->destination;
304 if (p)
305 stream_put(s, &p->u.prefix, blen);
306 else
307 stream_put(s, NULL, blen);
308
309 /* Write packet size. */
310 stream_putw_at(s, 0, stream_get_endp(s));
311
312 client->connected_rt_add_cnt++;
313 return zserv_send_message(client, s);
314 }
315
316 static int zsend_interface_nbr_address(int cmd, struct zserv *client,
317 struct interface *ifp,
318 struct nbr_connected *ifc)
319 {
320 int blen;
321 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
322 struct prefix *p;
323
324 zclient_create_header(s, cmd, ifp->vrf_id);
325 stream_putl(s, ifp->ifindex);
326
327 /* Prefix information. */
328 p = ifc->address;
329 stream_putc(s, p->family);
330 blen = prefix_blen(p);
331 stream_put(s, &p->u.prefix, blen);
332
333 /*
334 * XXX gnu version does not send prefixlen for
335 * ZEBRA_INTERFACE_ADDRESS_DELETE
336 * but zebra_interface_address_delete_read() in the gnu version
337 * expects to find it
338 */
339 stream_putc(s, p->prefixlen);
340
341 /* Write packet size. */
342 stream_putw_at(s, 0, stream_get_endp(s));
343
344 return zserv_send_message(client, s);
345 }
346
347 /* Interface address addition. */
348 static void zebra_interface_nbr_address_add_update(struct interface *ifp,
349 struct nbr_connected *ifc)
350 {
351 struct listnode *node, *nnode;
352 struct zserv *client;
353 struct prefix *p;
354
355 if (IS_ZEBRA_DEBUG_EVENT) {
356 char buf[INET6_ADDRSTRLEN];
357
358 p = ifc->address;
359 zlog_debug(
360 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_ADD %s/%d on %s",
361 inet_ntop(p->family, &p->u.prefix, buf,
362 INET6_ADDRSTRLEN),
363 p->prefixlen, ifc->ifp->name);
364 }
365
366 for (ALL_LIST_ELEMENTS(zebrad.client_list, node, nnode, client))
367 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
368 client, ifp, ifc);
369 }
370
371 /* Interface address deletion. */
372 static void zebra_interface_nbr_address_delete_update(struct interface *ifp,
373 struct nbr_connected *ifc)
374 {
375 struct listnode *node, *nnode;
376 struct zserv *client;
377 struct prefix *p;
378
379 if (IS_ZEBRA_DEBUG_EVENT) {
380 char buf[INET6_ADDRSTRLEN];
381
382 p = ifc->address;
383 zlog_debug(
384 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_DELETE %s/%d on %s",
385 inet_ntop(p->family, &p->u.prefix, buf,
386 INET6_ADDRSTRLEN),
387 p->prefixlen, ifc->ifp->name);
388 }
389
390 for (ALL_LIST_ELEMENTS(zebrad.client_list, node, nnode, client))
391 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE,
392 client, ifp, ifc);
393 }
394
395 /* Send addresses on interface to client */
396 int zsend_interface_addresses(struct zserv *client, struct interface *ifp)
397 {
398 struct listnode *cnode, *cnnode;
399 struct connected *c;
400 struct nbr_connected *nc;
401
402 /* Send interface addresses. */
403 for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode, c)) {
404 if (!CHECK_FLAG(c->conf, ZEBRA_IFC_REAL))
405 continue;
406
407 if (zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD, client,
408 ifp, c)
409 < 0)
410 return -1;
411 }
412
413 /* Send interface neighbors. */
414 for (ALL_LIST_ELEMENTS(ifp->nbr_connected, cnode, cnnode, nc)) {
415 if (zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
416 client, ifp, nc)
417 < 0)
418 return -1;
419 }
420
421 return 0;
422 }
423
424 /* Notify client about interface moving from one VRF to another.
425 * Whether client is interested in old and new VRF is checked by caller.
426 */
427 int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
428 vrf_id_t vrf_id)
429 {
430 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
431
432 zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf_id);
433
434 /* Fill in the ifIndex of the interface and its new VRF (id) */
435 stream_putl(s, ifp->ifindex);
436 stream_putl(s, vrf_id);
437
438 /* Write packet size. */
439 stream_putw_at(s, 0, stream_get_endp(s));
440
441 client->if_vrfchg_cnt++;
442 return zserv_send_message(client, s);
443 }
444
445 /* Add new nbr connected IPv6 address */
446 void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address)
447 {
448 struct nbr_connected *ifc;
449 struct prefix p;
450
451 p.family = AF_INET6;
452 IPV6_ADDR_COPY(&p.u.prefix6, address);
453 p.prefixlen = IPV6_MAX_PREFIXLEN;
454
455 ifc = listnode_head(ifp->nbr_connected);
456 if (!ifc) {
457 /* new addition */
458 ifc = nbr_connected_new();
459 ifc->address = prefix_new();
460 ifc->ifp = ifp;
461 listnode_add(ifp->nbr_connected, ifc);
462 }
463
464 prefix_copy(ifc->address, &p);
465
466 zebra_interface_nbr_address_add_update(ifp, ifc);
467
468 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 1);
469 }
470
471 void nbr_connected_delete_ipv6(struct interface *ifp, struct in6_addr *address)
472 {
473 struct nbr_connected *ifc;
474 struct prefix p;
475
476 p.family = AF_INET6;
477 IPV6_ADDR_COPY(&p.u.prefix6, address);
478 p.prefixlen = IPV6_MAX_PREFIXLEN;
479
480 ifc = nbr_connected_check(ifp, &p);
481 if (!ifc)
482 return;
483
484 listnode_delete(ifp->nbr_connected, ifc);
485
486 zebra_interface_nbr_address_delete_update(ifp, ifc);
487
488 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 0);
489
490 nbr_connected_free(ifc);
491 }
492
493 /*
494 * The cmd passed to zsend_interface_update may be ZEBRA_INTERFACE_UP or
495 * ZEBRA_INTERFACE_DOWN.
496 *
497 * The ZEBRA_INTERFACE_UP message is sent from the zebra server to
498 * the clients in one of 2 situations:
499 * - an if_up is detected e.g., as a result of an RTM_IFINFO message
500 * - a vty command modifying the bandwidth of an interface is received.
501 * The ZEBRA_INTERFACE_DOWN message is sent when an if_down is detected.
502 */
503 int zsend_interface_update(int cmd, struct zserv *client, struct interface *ifp)
504 {
505 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
506
507 zclient_create_header(s, cmd, ifp->vrf_id);
508 zserv_encode_interface(s, ifp);
509
510 if (cmd == ZEBRA_INTERFACE_UP)
511 client->ifup_cnt++;
512 else
513 client->ifdown_cnt++;
514
515 return zserv_send_message(client, s);
516 }
517
518 int zsend_redistribute_route(int cmd, struct zserv *client,
519 const struct prefix *p,
520 const struct prefix *src_p, struct route_entry *re)
521 {
522 struct zapi_route api;
523 struct zapi_nexthop *api_nh;
524 struct nexthop *nexthop;
525 int count = 0;
526 afi_t afi;
527
528 memset(&api, 0, sizeof(api));
529 api.vrf_id = re->vrf_id;
530 api.type = re->type;
531 api.instance = re->instance;
532 api.flags = re->flags;
533
534 afi = family2afi(p->family);
535 switch (afi) {
536 case AFI_IP:
537 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
538 client->redist_v4_add_cnt++;
539 else
540 client->redist_v4_del_cnt++;
541 break;
542 case AFI_IP6:
543 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
544 client->redist_v6_add_cnt++;
545 else
546 client->redist_v6_del_cnt++;
547 break;
548 default:
549 break;
550 }
551
552 /* Prefix. */
553 api.prefix = *p;
554 if (src_p) {
555 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
556 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
557 }
558
559 /* Nexthops. */
560 if (re->nexthop_active_num) {
561 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
562 api.nexthop_num = re->nexthop_active_num;
563 }
564 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) {
565 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
566 continue;
567
568 api_nh = &api.nexthops[count];
569 api_nh->vrf_id = nexthop->vrf_id;
570 api_nh->type = nexthop->type;
571 switch (nexthop->type) {
572 case NEXTHOP_TYPE_BLACKHOLE:
573 api_nh->bh_type = nexthop->bh_type;
574 break;
575 case NEXTHOP_TYPE_IPV4:
576 api_nh->gate.ipv4 = nexthop->gate.ipv4;
577 break;
578 case NEXTHOP_TYPE_IPV4_IFINDEX:
579 api_nh->gate.ipv4 = nexthop->gate.ipv4;
580 api_nh->ifindex = nexthop->ifindex;
581 break;
582 case NEXTHOP_TYPE_IFINDEX:
583 api_nh->ifindex = nexthop->ifindex;
584 break;
585 case NEXTHOP_TYPE_IPV6:
586 api_nh->gate.ipv6 = nexthop->gate.ipv6;
587 break;
588 case NEXTHOP_TYPE_IPV6_IFINDEX:
589 api_nh->gate.ipv6 = nexthop->gate.ipv6;
590 api_nh->ifindex = nexthop->ifindex;
591 }
592 count++;
593 }
594
595 /* Attributes. */
596 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
597 api.distance = re->distance;
598 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
599 api.metric = re->metric;
600 if (re->tag) {
601 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
602 api.tag = re->tag;
603 }
604 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
605 api.mtu = re->mtu;
606
607 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
608
609 /* Encode route and send. */
610 if (zapi_route_encode(cmd, s, &api) < 0) {
611 stream_free(s);
612 return -1;
613 }
614
615 if (IS_ZEBRA_DEBUG_SEND) {
616 char buf_prefix[PREFIX_STRLEN];
617
618 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
619
620 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
621 __func__, zserv_command_string(cmd),
622 zebra_route_string(client->proto),
623 zebra_route_string(api.type), api.vrf_id,
624 buf_prefix);
625 }
626 return zserv_send_message(client, s);
627 }
628
629 /*
630 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
631 * nexthop is not found on mrib. Returns both route metric and protocol
632 * distance.
633 */
634 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
635 struct in_addr addr,
636 struct route_entry *re,
637 struct zebra_vrf *zvrf)
638 {
639 struct stream *s;
640 unsigned long nump;
641 uint8_t num;
642 struct nexthop *nexthop;
643
644 /* Get output stream. */
645 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
646 stream_reset(s);
647
648 /* Fill in result. */
649 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
650 stream_put_in_addr(s, &addr);
651
652 if (re) {
653 stream_putc(s, re->distance);
654 stream_putl(s, re->metric);
655 num = 0;
656 /* remember position for nexthop_num */
657 nump = stream_get_endp(s);
658 /* reserve room for nexthop_num */
659 stream_putc(s, 0);
660 /*
661 * Only non-recursive routes are elegible to resolve the
662 * nexthop we are looking up. Therefore, we will just iterate
663 * over the top chain of nexthops.
664 */
665 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next)
666 if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
667 num += zserv_encode_nexthop(s, nexthop);
668
669 /* store nexthop_num */
670 stream_putc_at(s, nump, num);
671 } else {
672 stream_putc(s, 0); /* distance */
673 stream_putl(s, 0); /* metric */
674 stream_putc(s, 0); /* nexthop_num */
675 }
676
677 stream_putw_at(s, 0, stream_get_endp(s));
678
679 return zserv_send_message(client, s);
680 }
681
682 /*
683 * Common utility send route notification, called from a path using a
684 * route_entry and from a path using a dataplane context.
685 */
686 static int route_notify_internal(const struct prefix *p, int type,
687 uint16_t instance, vrf_id_t vrf_id,
688 uint32_t table_id,
689 enum zapi_route_notify_owner note)
690 {
691 struct zserv *client;
692 struct stream *s;
693 uint8_t blen;
694
695 client = zserv_find_client(type, instance);
696 if (!client || !client->notify_owner) {
697 if (IS_ZEBRA_DEBUG_PACKET) {
698 char buff[PREFIX_STRLEN];
699
700 zlog_debug(
701 "Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
702 type, prefix2str(p, buff, sizeof(buff)),
703 table_id, note, vrf_id);
704 }
705 return 0;
706 }
707
708 if (IS_ZEBRA_DEBUG_PACKET) {
709 char buff[PREFIX_STRLEN];
710
711 zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
712 type, prefix2str(p, buff, sizeof(buff)),
713 table_id, note, vrf_id);
714 }
715
716 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
717 stream_reset(s);
718
719 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
720
721 stream_put(s, &note, sizeof(note));
722
723 stream_putc(s, p->family);
724
725 blen = prefix_blen(p);
726 stream_putc(s, p->prefixlen);
727 stream_put(s, &p->u.prefix, blen);
728
729 stream_putl(s, table_id);
730
731 stream_putw_at(s, 0, stream_get_endp(s));
732
733 return zserv_send_message(client, s);
734 }
735
736 int zsend_route_notify_owner(struct route_entry *re, const struct prefix *p,
737 enum zapi_route_notify_owner note)
738 {
739 return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
740 re->table, note));
741 }
742
743 /*
744 * Route-owner notification using info from dataplane update context.
745 */
746 int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx,
747 enum zapi_route_notify_owner note)
748 {
749 return (route_notify_internal(dplane_ctx_get_dest(ctx),
750 dplane_ctx_get_type(ctx),
751 dplane_ctx_get_instance(ctx),
752 dplane_ctx_get_vrf(ctx),
753 dplane_ctx_get_table(ctx),
754 note));
755 }
756
757 void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
758 enum zapi_rule_notify_owner note)
759 {
760 struct listnode *node;
761 struct zserv *client;
762 struct stream *s;
763
764 if (IS_ZEBRA_DEBUG_PACKET)
765 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
766 rule->rule.unique);
767
768 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
769 if (rule->sock == client->sock)
770 break;
771 }
772
773 if (!client)
774 return;
775
776 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
777
778 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
779 stream_put(s, &note, sizeof(note));
780 stream_putl(s, rule->rule.seq);
781 stream_putl(s, rule->rule.priority);
782 stream_putl(s, rule->rule.unique);
783 if (rule->ifp)
784 stream_putl(s, rule->ifp->ifindex);
785 else
786 stream_putl(s, 0);
787
788 stream_putw_at(s, 0, stream_get_endp(s));
789
790 zserv_send_message(client, s);
791 }
792
793 void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
794 enum zapi_ipset_notify_owner note)
795 {
796 struct listnode *node;
797 struct zserv *client;
798 struct stream *s;
799
800 if (IS_ZEBRA_DEBUG_PACKET)
801 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
802 ipset->unique);
803
804 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
805 if (ipset->sock == client->sock)
806 break;
807 }
808
809 if (!client)
810 return;
811
812 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
813
814 zclient_create_header(s, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
815 stream_put(s, &note, sizeof(note));
816 stream_putl(s, ipset->unique);
817 stream_put(s, ipset->ipset_name, ZEBRA_IPSET_NAME_SIZE);
818 stream_putw_at(s, 0, stream_get_endp(s));
819
820 zserv_send_message(client, s);
821 }
822
823 void zsend_ipset_entry_notify_owner(struct zebra_pbr_ipset_entry *ipset,
824 enum zapi_ipset_entry_notify_owner note)
825 {
826 struct listnode *node;
827 struct zserv *client;
828 struct stream *s;
829
830 if (IS_ZEBRA_DEBUG_PACKET)
831 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
832 ipset->unique);
833
834 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
835 if (ipset->sock == client->sock)
836 break;
837 }
838
839 if (!client)
840 return;
841
842 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
843
844 zclient_create_header(s, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
845 stream_put(s, &note, sizeof(note));
846 stream_putl(s, ipset->unique);
847 stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
848 stream_putw_at(s, 0, stream_get_endp(s));
849
850 zserv_send_message(client, s);
851 }
852
853 void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
854 enum zapi_iptable_notify_owner note)
855 {
856 struct listnode *node;
857 struct zserv *client;
858 struct stream *s;
859
860 if (IS_ZEBRA_DEBUG_PACKET)
861 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
862 iptable->unique);
863
864 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
865 if (iptable->sock == client->sock)
866 break;
867 }
868
869 if (!client)
870 return;
871
872 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
873
874 zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
875 stream_put(s, &note, sizeof(note));
876 stream_putl(s, iptable->unique);
877 stream_putw_at(s, 0, stream_get_endp(s));
878
879 zserv_send_message(client, s);
880 }
881
882 /* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
883 int zsend_router_id_update(struct zserv *client, struct prefix *p,
884 vrf_id_t vrf_id)
885 {
886 int blen;
887
888 /* Check this client need interface information. */
889 if (!vrf_bitmap_check(client->ridinfo, vrf_id))
890 return 0;
891
892 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
893
894 /* Message type. */
895 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
896
897 /* Prefix information. */
898 stream_putc(s, p->family);
899 blen = prefix_blen(p);
900 stream_put(s, &p->u.prefix, blen);
901 stream_putc(s, p->prefixlen);
902
903 /* Write packet size. */
904 stream_putw_at(s, 0, stream_get_endp(s));
905
906 return zserv_send_message(client, s);
907 }
908
909 /*
910 * Function used by Zebra to send a PW status update to LDP daemon
911 */
912 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
913 {
914 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
915
916 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
917 stream_write(s, pw->ifname, IF_NAMESIZE);
918 stream_putl(s, pw->ifindex);
919 stream_putl(s, pw->status);
920
921 /* Put length at the first point of the stream. */
922 stream_putw_at(s, 0, stream_get_endp(s));
923
924 return zserv_send_message(client, s);
925 }
926
927 /* Send response to a get label chunk request to client */
928 static int zsend_assign_label_chunk_response(struct zserv *client,
929 vrf_id_t vrf_id,
930 struct label_manager_chunk *lmc)
931 {
932 int ret;
933 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
934
935 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
936
937 if (lmc) {
938 /* proto */
939 stream_putc(s, lmc->proto);
940 /* instance */
941 stream_putw(s, lmc->instance);
942 /* keep */
943 stream_putc(s, lmc->keep);
944 /* start and end labels */
945 stream_putl(s, lmc->start);
946 stream_putl(s, lmc->end);
947 }
948
949 /* Write packet size. */
950 stream_putw_at(s, 0, stream_get_endp(s));
951
952 ret = writen(client->sock, s->data, stream_get_endp(s));
953 stream_free(s);
954 return ret;
955 }
956
957 /* Send response to a label manager connect request to client */
958 static int zsend_label_manager_connect_response(struct zserv *client,
959 vrf_id_t vrf_id,
960 unsigned short result)
961 {
962 int ret;
963 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
964
965 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
966
967 /* proto */
968 stream_putc(s, client->proto);
969
970 /* instance */
971 stream_putw(s, client->instance);
972
973 /* result */
974 stream_putc(s, result);
975
976 /* Write packet size. */
977 stream_putw_at(s, 0, stream_get_endp(s));
978
979 ret = writen(client->sock, s->data, stream_get_endp(s));
980 stream_free(s);
981
982 return ret;
983 }
984
985 /* Send response to a get table chunk request to client */
986 static int zsend_assign_table_chunk_response(struct zserv *client,
987 vrf_id_t vrf_id,
988 struct table_manager_chunk *tmc)
989 {
990 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
991
992 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
993
994 if (tmc) {
995 /* start and end labels */
996 stream_putl(s, tmc->start);
997 stream_putl(s, tmc->end);
998 }
999
1000 /* Write packet size. */
1001 stream_putw_at(s, 0, stream_get_endp(s));
1002
1003 return zserv_send_message(client, s);
1004 }
1005
1006 static int zsend_table_manager_connect_response(struct zserv *client,
1007 vrf_id_t vrf_id,
1008 uint16_t result)
1009 {
1010 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1011
1012 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
1013
1014 /* result */
1015 stream_putc(s, result);
1016
1017 stream_putw_at(s, 0, stream_get_endp(s));
1018
1019 return zserv_send_message(client, s);
1020 }
1021
1022 /* Inbound message handling ------------------------------------------------ */
1023
1024 int cmd2type[] = {
1025 [ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
1026 [ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
1027 [ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
1028 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
1029 };
1030
1031 /* Nexthop register */
1032 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1033 {
1034 struct rnh *rnh;
1035 struct stream *s;
1036 struct prefix p;
1037 unsigned short l = 0;
1038 uint8_t flags = 0;
1039 uint16_t type = cmd2type[hdr->command];
1040 bool exist;
1041
1042 if (IS_ZEBRA_DEBUG_NHT)
1043 zlog_debug(
1044 "rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
1045 zebra_route_string(client->proto), hdr->length,
1046 (type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
1047 zvrf->vrf->vrf_id);
1048
1049 s = msg;
1050
1051 client->nh_reg_time = monotime(NULL);
1052
1053 while (l < hdr->length) {
1054 STREAM_GETC(s, flags);
1055 STREAM_GETW(s, p.family);
1056 STREAM_GETC(s, p.prefixlen);
1057 l += 4;
1058 if (p.family == AF_INET) {
1059 if (p.prefixlen > IPV4_MAX_BITLEN) {
1060 zlog_debug(
1061 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1062 __PRETTY_FUNCTION__, p.prefixlen);
1063 return;
1064 }
1065 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1066 l += IPV4_MAX_BYTELEN;
1067 } else if (p.family == AF_INET6) {
1068 if (p.prefixlen > IPV6_MAX_BITLEN) {
1069 zlog_debug(
1070 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1071 __PRETTY_FUNCTION__, p.prefixlen);
1072 return;
1073 }
1074 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1075 l += IPV6_MAX_BYTELEN;
1076 } else {
1077 flog_err(
1078 EC_ZEBRA_UNKNOWN_FAMILY,
1079 "rnh_register: Received unknown family type %d\n",
1080 p.family);
1081 return;
1082 }
1083 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
1084 if (!rnh)
1085 return;
1086
1087 if (type == RNH_NEXTHOP_TYPE) {
1088 if (flags
1089 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1090 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1091 else if (!flags
1092 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1093 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1094 } else if (type == RNH_IMPORT_CHECK_TYPE) {
1095 if (flags
1096 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
1097 SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1098 else if (!flags
1099 && CHECK_FLAG(rnh->flags,
1100 ZEBRA_NHT_EXACT_MATCH))
1101 UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1102 }
1103
1104 zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
1105 /* Anything not AF_INET/INET6 has been filtered out above */
1106 if (!exist)
1107 zebra_evaluate_rnh(zvrf, p.family, 1, type, &p);
1108 }
1109
1110 stream_failure:
1111 return;
1112 }
1113
1114 /* Nexthop register */
1115 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1116 {
1117 struct rnh *rnh;
1118 struct stream *s;
1119 struct prefix p;
1120 unsigned short l = 0;
1121 uint16_t type = cmd2type[hdr->command];
1122
1123 if (IS_ZEBRA_DEBUG_NHT)
1124 zlog_debug(
1125 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
1126 zebra_route_string(client->proto), hdr->length,
1127 zvrf->vrf->vrf_id);
1128
1129 s = msg;
1130
1131 while (l < hdr->length) {
1132 uint8_t flags;
1133
1134 STREAM_GETC(s, flags);
1135 if (flags != 0)
1136 goto stream_failure;
1137
1138 STREAM_GETW(s, p.family);
1139 STREAM_GETC(s, p.prefixlen);
1140 l += 4;
1141 if (p.family == AF_INET) {
1142 if (p.prefixlen > IPV4_MAX_BITLEN) {
1143 zlog_debug(
1144 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1145 __PRETTY_FUNCTION__, p.prefixlen);
1146 return;
1147 }
1148 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1149 l += IPV4_MAX_BYTELEN;
1150 } else if (p.family == AF_INET6) {
1151 if (p.prefixlen > IPV6_MAX_BITLEN) {
1152 zlog_debug(
1153 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1154 __PRETTY_FUNCTION__, p.prefixlen);
1155 return;
1156 }
1157 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1158 l += IPV6_MAX_BYTELEN;
1159 } else {
1160 flog_err(
1161 EC_ZEBRA_UNKNOWN_FAMILY,
1162 "rnh_register: Received unknown family type %d\n",
1163 p.family);
1164 return;
1165 }
1166 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
1167 if (rnh) {
1168 client->nh_dereg_time = monotime(NULL);
1169 zebra_remove_rnh_client(rnh, client, type);
1170 }
1171 }
1172 stream_failure:
1173 return;
1174 }
1175
1176 #define ZEBRA_MIN_FEC_LENGTH 5
1177
1178 /* FEC register */
1179 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1180 {
1181 struct stream *s;
1182 unsigned short l = 0;
1183 struct prefix p;
1184 uint16_t flags;
1185 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1186
1187 s = msg;
1188 zvrf = vrf_info_lookup(VRF_DEFAULT);
1189 if (!zvrf)
1190 return;
1191
1192 /*
1193 * The minimum amount of data that can be sent for one fec
1194 * registration
1195 */
1196 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1197 flog_err(
1198 EC_ZEBRA_IRDP_LEN_MISMATCH,
1199 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1200 hdr->length);
1201 return;
1202 }
1203
1204 while (l < hdr->length) {
1205 STREAM_GETW(s, flags);
1206 memset(&p, 0, sizeof(p));
1207 STREAM_GETW(s, p.family);
1208 if (p.family != AF_INET && p.family != AF_INET6) {
1209 flog_err(
1210 EC_ZEBRA_UNKNOWN_FAMILY,
1211 "fec_register: Received unknown family type %d\n",
1212 p.family);
1213 return;
1214 }
1215 STREAM_GETC(s, p.prefixlen);
1216 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1217 || (p.family == AF_INET6
1218 && p.prefixlen > IPV6_MAX_BITLEN)) {
1219 zlog_debug(
1220 "%s: Specified prefix hdr->length: %d is to long for %d",
1221 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1222 return;
1223 }
1224 l += 5;
1225 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1226 l += PSIZE(p.prefixlen);
1227 if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1228 STREAM_GETL(s, label_index);
1229 l += 4;
1230 } else
1231 label_index = MPLS_INVALID_LABEL_INDEX;
1232 zebra_mpls_fec_register(zvrf, &p, label_index, client);
1233 }
1234
1235 stream_failure:
1236 return;
1237 }
1238
1239 /* FEC unregister */
1240 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1241 {
1242 struct stream *s;
1243 unsigned short l = 0;
1244 struct prefix p;
1245 uint16_t flags;
1246
1247 s = msg;
1248 zvrf = vrf_info_lookup(VRF_DEFAULT);
1249 if (!zvrf)
1250 return;
1251
1252 /*
1253 * The minimum amount of data that can be sent for one
1254 * fec unregistration
1255 */
1256 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1257 flog_err(
1258 EC_ZEBRA_IRDP_LEN_MISMATCH,
1259 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1260 hdr->length);
1261 return;
1262 }
1263
1264 while (l < hdr->length) {
1265 STREAM_GETW(s, flags);
1266 if (flags != 0)
1267 goto stream_failure;
1268
1269 memset(&p, 0, sizeof(p));
1270 STREAM_GETW(s, p.family);
1271 if (p.family != AF_INET && p.family != AF_INET6) {
1272 flog_err(
1273 EC_ZEBRA_UNKNOWN_FAMILY,
1274 "fec_unregister: Received unknown family type %d\n",
1275 p.family);
1276 return;
1277 }
1278 STREAM_GETC(s, p.prefixlen);
1279 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1280 || (p.family == AF_INET6
1281 && p.prefixlen > IPV6_MAX_BITLEN)) {
1282 zlog_debug(
1283 "%s: Received prefix hdr->length %d which is greater than %d can support",
1284 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1285 return;
1286 }
1287 l += 5;
1288 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1289 l += PSIZE(p.prefixlen);
1290 zebra_mpls_fec_unregister(zvrf, &p, client);
1291 }
1292
1293 stream_failure:
1294 return;
1295 }
1296
1297
1298 /*
1299 * Register zebra server interface information.
1300 * Send current all interface and address information.
1301 */
1302 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1303 {
1304 struct vrf *vrf;
1305 struct interface *ifp;
1306
1307 /* Interface information is needed. */
1308 vrf_bitmap_set(client->ifinfo, zvrf_id(zvrf));
1309
1310 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1311 FOR_ALL_INTERFACES (vrf, ifp) {
1312 /* Skip pseudo interface. */
1313 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1314 continue;
1315
1316 zsend_interface_add(client, ifp);
1317 zsend_interface_addresses(client, ifp);
1318 }
1319 }
1320 }
1321
1322 /* Unregister zebra server interface information. */
1323 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1324 {
1325 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1326 }
1327
1328 void zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1329 const unsigned int nexthop_num)
1330 {
1331 if (nexthop_num > multipath_num) {
1332 char buff[PREFIX2STR_BUFFER];
1333
1334 prefix2str(p, buff, sizeof(buff));
1335 flog_warn(
1336 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1337 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1338 caller, buff, nexthop_num, multipath_num);
1339 }
1340 }
1341
1342 static void zread_route_add(ZAPI_HANDLER_ARGS)
1343 {
1344 struct stream *s;
1345 struct zapi_route api;
1346 struct zapi_nexthop *api_nh;
1347 afi_t afi;
1348 struct prefix_ipv6 *src_p = NULL;
1349 struct route_entry *re;
1350 struct nexthop *nexthop = NULL;
1351 int i, ret;
1352 vrf_id_t vrf_id = 0;
1353 struct ipaddr vtep_ip;
1354
1355 s = msg;
1356 if (zapi_route_decode(s, &api) < 0) {
1357 if (IS_ZEBRA_DEBUG_RECV)
1358 zlog_debug("%s: Unable to decode zapi_route sent",
1359 __PRETTY_FUNCTION__);
1360 return;
1361 }
1362
1363 if (IS_ZEBRA_DEBUG_RECV) {
1364 char buf_prefix[PREFIX_STRLEN];
1365
1366 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1367 zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
1368 __func__, buf_prefix,
1369 (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
1370 : "un"),
1371 api.flags);
1372 }
1373
1374 /* Allocate new route. */
1375 vrf_id = zvrf_id(zvrf);
1376 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
1377 re->type = api.type;
1378 re->instance = api.instance;
1379 re->flags = api.flags;
1380 re->uptime = time(NULL);
1381 re->vrf_id = vrf_id;
1382 if (api.tableid && vrf_id == VRF_DEFAULT)
1383 re->table = api.tableid;
1384 else
1385 re->table = zvrf->table_id;
1386
1387 /*
1388 * TBD should _all_ of the nexthop add operations use
1389 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1390 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1391 */
1392 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP))
1393 for (i = 0; i < api.nexthop_num; i++) {
1394 api_nh = &api.nexthops[i];
1395 ifindex_t ifindex = 0;
1396
1397 if (IS_ZEBRA_DEBUG_RECV)
1398 zlog_debug("nh type %d", api_nh->type);
1399
1400 switch (api_nh->type) {
1401 case NEXTHOP_TYPE_IFINDEX:
1402 nexthop = route_entry_nexthop_ifindex_add(
1403 re, api_nh->ifindex, api_nh->vrf_id);
1404 break;
1405 case NEXTHOP_TYPE_IPV4:
1406 if (IS_ZEBRA_DEBUG_RECV) {
1407 char nhbuf[INET6_ADDRSTRLEN] = {0};
1408
1409 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1410 nhbuf, INET6_ADDRSTRLEN);
1411 zlog_debug("%s: nh=%s, vrf_id=%d",
1412 __func__, nhbuf,
1413 api_nh->vrf_id);
1414 }
1415 nexthop = route_entry_nexthop_ipv4_add(
1416 re, &api_nh->gate.ipv4, NULL,
1417 api_nh->vrf_id);
1418 break;
1419 case NEXTHOP_TYPE_IPV4_IFINDEX:
1420
1421 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1422 if (CHECK_FLAG(api.flags,
1423 ZEBRA_FLAG_EVPN_ROUTE)) {
1424 ifindex = get_l3vni_svi_ifindex(vrf_id);
1425 } else {
1426 ifindex = api_nh->ifindex;
1427 }
1428
1429 if (IS_ZEBRA_DEBUG_RECV) {
1430 char nhbuf[INET6_ADDRSTRLEN] = {0};
1431
1432 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1433 nhbuf, INET6_ADDRSTRLEN);
1434 zlog_debug(
1435 "%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
1436 __func__, nhbuf, api_nh->vrf_id,
1437 re->vrf_id, ifindex);
1438 }
1439 nexthop = route_entry_nexthop_ipv4_ifindex_add(
1440 re, &api_nh->gate.ipv4, NULL, ifindex,
1441 api_nh->vrf_id);
1442
1443 /* if this an EVPN route entry,
1444 * program the nh as neigh
1445 */
1446 if (CHECK_FLAG(api.flags,
1447 ZEBRA_FLAG_EVPN_ROUTE)) {
1448 SET_FLAG(nexthop->flags,
1449 NEXTHOP_FLAG_EVPN_RVTEP);
1450 vtep_ip.ipa_type = IPADDR_V4;
1451 memcpy(&(vtep_ip.ipaddr_v4),
1452 &(api_nh->gate.ipv4),
1453 sizeof(struct in_addr));
1454 zebra_vxlan_evpn_vrf_route_add(
1455 vrf_id, &api_nh->rmac, &vtep_ip,
1456 &api.prefix);
1457 }
1458 break;
1459 case NEXTHOP_TYPE_IPV6:
1460 nexthop = route_entry_nexthop_ipv6_add(
1461 re, &api_nh->gate.ipv6, api_nh->vrf_id);
1462 break;
1463 case NEXTHOP_TYPE_IPV6_IFINDEX:
1464 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1465 if (CHECK_FLAG(api.flags,
1466 ZEBRA_FLAG_EVPN_ROUTE)) {
1467 ifindex = get_l3vni_svi_ifindex(vrf_id);
1468 } else {
1469 ifindex = api_nh->ifindex;
1470 }
1471
1472 nexthop = route_entry_nexthop_ipv6_ifindex_add(
1473 re, &api_nh->gate.ipv6, ifindex,
1474 api_nh->vrf_id);
1475
1476 /* if this an EVPN route entry,
1477 * program the nh as neigh
1478 */
1479 if (CHECK_FLAG(api.flags,
1480 ZEBRA_FLAG_EVPN_ROUTE)) {
1481 SET_FLAG(nexthop->flags,
1482 NEXTHOP_FLAG_EVPN_RVTEP);
1483 vtep_ip.ipa_type = IPADDR_V6;
1484 memcpy(&vtep_ip.ipaddr_v6,
1485 &(api_nh->gate.ipv6),
1486 sizeof(struct in6_addr));
1487 zebra_vxlan_evpn_vrf_route_add(
1488 vrf_id, &api_nh->rmac, &vtep_ip,
1489 &api.prefix);
1490 }
1491 break;
1492 case NEXTHOP_TYPE_BLACKHOLE:
1493 nexthop = route_entry_nexthop_blackhole_add(
1494 re, api_nh->bh_type);
1495 break;
1496 }
1497
1498 if (!nexthop) {
1499 flog_warn(
1500 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1501 "%s: Nexthops Specified: %d but we failed to properly create one",
1502 __PRETTY_FUNCTION__, api.nexthop_num);
1503 nexthops_free(re->ng.nexthop);
1504 XFREE(MTYPE_RE, re);
1505 return;
1506 }
1507 /* MPLS labels for BGP-LU or Segment Routing */
1508 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
1509 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1510 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1511 enum lsp_types_t label_type;
1512
1513 label_type =
1514 lsp_type_from_re_type(client->proto);
1515
1516 if (IS_ZEBRA_DEBUG_RECV) {
1517 zlog_debug(
1518 "%s: adding %d labels of type %d (1st=%u)",
1519 __func__, api_nh->label_num,
1520 label_type, api_nh->labels[0]);
1521 }
1522
1523 nexthop_add_labels(nexthop, label_type,
1524 api_nh->label_num,
1525 &api_nh->labels[0]);
1526 }
1527 }
1528
1529 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
1530 re->distance = api.distance;
1531 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
1532 re->metric = api.metric;
1533 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
1534 re->tag = api.tag;
1535 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
1536 re->mtu = api.mtu;
1537
1538 afi = family2afi(api.prefix.family);
1539 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1540 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1541 "%s: Received SRC Prefix but afi is not v6",
1542 __PRETTY_FUNCTION__);
1543 nexthops_free(re->ng.nexthop);
1544 XFREE(MTYPE_RE, re);
1545 return;
1546 }
1547 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1548 src_p = &api.src_prefix;
1549
1550 ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
1551
1552 /* Stats */
1553 switch (api.prefix.family) {
1554 case AF_INET:
1555 if (ret > 0)
1556 client->v4_route_add_cnt++;
1557 else if (ret < 0)
1558 client->v4_route_upd8_cnt++;
1559 break;
1560 case AF_INET6:
1561 if (ret > 0)
1562 client->v6_route_add_cnt++;
1563 else if (ret < 0)
1564 client->v6_route_upd8_cnt++;
1565 break;
1566 }
1567 }
1568
1569 static void zread_route_del(ZAPI_HANDLER_ARGS)
1570 {
1571 struct stream *s;
1572 struct zapi_route api;
1573 afi_t afi;
1574 struct prefix_ipv6 *src_p = NULL;
1575 uint32_t table_id;
1576
1577 s = msg;
1578 if (zapi_route_decode(s, &api) < 0)
1579 return;
1580
1581 afi = family2afi(api.prefix.family);
1582 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1583 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1584 "%s: Received a src prefix while afi is not v6",
1585 __PRETTY_FUNCTION__);
1586 return;
1587 }
1588 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1589 src_p = &api.src_prefix;
1590
1591 if (api.vrf_id == VRF_DEFAULT && api.tableid != 0)
1592 table_id = api.tableid;
1593 else
1594 table_id = zvrf->table_id;
1595
1596 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
1597 api.flags, &api.prefix, src_p, NULL, table_id, api.metric,
1598 api.distance, false);
1599
1600 /* Stats */
1601 switch (api.prefix.family) {
1602 case AF_INET:
1603 client->v4_route_del_cnt++;
1604 break;
1605 case AF_INET6:
1606 client->v6_route_del_cnt++;
1607 break;
1608 }
1609 }
1610
1611 /* MRIB Nexthop lookup for IPv4. */
1612 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
1613 {
1614 struct in_addr addr;
1615 struct route_entry *re;
1616
1617 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
1618 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
1619 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
1620
1621 stream_failure:
1622 return;
1623 }
1624
1625 /* Register zebra server router-id information. Send current router-id */
1626 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
1627 {
1628 struct prefix p;
1629
1630 /* Router-id information is needed. */
1631 vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
1632
1633 router_id_get(&p, zvrf_id(zvrf));
1634
1635 zsend_router_id_update(client, &p, zvrf_id(zvrf));
1636 }
1637
1638 /* Unregister zebra server router-id information. */
1639 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
1640 {
1641 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1642 }
1643
1644 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
1645 {
1646 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1647
1648 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
1649 stream_putc(s, mpls_enabled);
1650 stream_putl(s, multipath_num);
1651
1652 stream_putw_at(s, 0, stream_get_endp(s));
1653 zserv_send_message(client, s);
1654 }
1655
1656 /* Tie up route-type and client->sock */
1657 static void zread_hello(ZAPI_HANDLER_ARGS)
1658 {
1659 /* type of protocol (lib/zebra.h) */
1660 uint8_t proto;
1661 unsigned short instance;
1662 uint8_t notify;
1663
1664 STREAM_GETC(msg, proto);
1665 STREAM_GETW(msg, instance);
1666 STREAM_GETC(msg, notify);
1667 if (notify)
1668 client->notify_owner = true;
1669
1670 /* accept only dynamic routing protocols */
1671 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
1672 zlog_notice(
1673 "client %d says hello and bids fair to announce only %s routes vrf=%u",
1674 client->sock, zebra_route_string(proto),
1675 zvrf->vrf->vrf_id);
1676 if (instance)
1677 zlog_notice("client protocol instance %d", instance);
1678
1679 client->proto = proto;
1680 client->instance = instance;
1681 }
1682
1683 zsend_capabilities(client, zvrf);
1684 stream_failure:
1685 return;
1686 }
1687
1688 /* Unregister all information in a VRF. */
1689 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
1690 {
1691 int i;
1692 afi_t afi;
1693
1694 for (afi = AFI_IP; afi < AFI_MAX; afi++)
1695 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
1696 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
1697 vrf_bitmap_unset(client->redist_default, zvrf_id(zvrf));
1698 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1699 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1700 }
1701
1702 static void zread_mpls_labels(ZAPI_HANDLER_ARGS)
1703 {
1704 struct stream *s;
1705 enum lsp_types_t type;
1706 struct prefix prefix;
1707 enum nexthop_types_t gtype;
1708 union g_addr gate;
1709 ifindex_t ifindex;
1710 mpls_label_t in_label, out_label;
1711 uint8_t distance;
1712
1713 /* Get input stream. */
1714 s = msg;
1715
1716 /* Get data. */
1717 STREAM_GETC(s, type);
1718 STREAM_GETL(s, prefix.family);
1719 switch (prefix.family) {
1720 case AF_INET:
1721 STREAM_GET(&prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1722 STREAM_GETC(s, prefix.prefixlen);
1723 if (prefix.prefixlen > IPV4_MAX_BITLEN) {
1724 zlog_debug(
1725 "%s: Specified prefix length %d is greater than a v4 address can support",
1726 __PRETTY_FUNCTION__, prefix.prefixlen);
1727 return;
1728 }
1729 STREAM_GET(&gate.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
1730 break;
1731 case AF_INET6:
1732 STREAM_GET(&prefix.u.prefix6, s, 16);
1733 STREAM_GETC(s, prefix.prefixlen);
1734 if (prefix.prefixlen > IPV6_MAX_BITLEN) {
1735 zlog_debug(
1736 "%s: Specified prefix length %d is greater than a v6 address can support",
1737 __PRETTY_FUNCTION__, prefix.prefixlen);
1738 return;
1739 }
1740 STREAM_GET(&gate.ipv6, s, 16);
1741 break;
1742 default:
1743 zlog_debug("%s: Specified AF %d is not supported for this call",
1744 __PRETTY_FUNCTION__, prefix.family);
1745 return;
1746 }
1747 STREAM_GETL(s, ifindex);
1748 STREAM_GETC(s, distance);
1749 STREAM_GETL(s, in_label);
1750 STREAM_GETL(s, out_label);
1751
1752 switch (prefix.family) {
1753 case AF_INET:
1754 if (ifindex)
1755 gtype = NEXTHOP_TYPE_IPV4_IFINDEX;
1756 else
1757 gtype = NEXTHOP_TYPE_IPV4;
1758 break;
1759 case AF_INET6:
1760 if (ifindex)
1761 gtype = NEXTHOP_TYPE_IPV6_IFINDEX;
1762 else
1763 gtype = NEXTHOP_TYPE_IPV6;
1764 break;
1765 default:
1766 return;
1767 }
1768
1769 if (!mpls_enabled)
1770 return;
1771
1772 if (hdr->command == ZEBRA_MPLS_LABELS_ADD) {
1773 mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
1774 ifindex);
1775 mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
1776 distance, out_label);
1777 } else if (hdr->command == ZEBRA_MPLS_LABELS_DELETE) {
1778 mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
1779 mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
1780 distance, out_label);
1781 }
1782 stream_failure:
1783 return;
1784 }
1785
1786 /* Send response to a table manager connect request to client */
1787 static void zread_table_manager_connect(struct zserv *client,
1788 struct stream *msg, vrf_id_t vrf_id)
1789 {
1790 struct stream *s;
1791 uint8_t proto;
1792 uint16_t instance;
1793
1794 s = msg;
1795
1796 /* Get data. */
1797 STREAM_GETC(s, proto);
1798 STREAM_GETW(s, instance);
1799
1800 /* accept only dynamic routing protocols */
1801 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1802 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1803 "client %d has wrong protocol %s", client->sock,
1804 zebra_route_string(proto));
1805 zsend_table_manager_connect_response(client, vrf_id, 1);
1806 return;
1807 }
1808 zlog_notice("client %d with vrf %u instance %u connected as %s",
1809 client->sock, vrf_id, instance, zebra_route_string(proto));
1810 client->proto = proto;
1811 client->instance = instance;
1812
1813 /*
1814 * Release previous labels of same protocol and instance.
1815 * This is done in case it restarted from an unexpected shutdown.
1816 */
1817 release_daemon_table_chunks(client);
1818
1819 zsend_table_manager_connect_response(client, vrf_id, 0);
1820
1821 stream_failure:
1822 return;
1823 }
1824
1825 static void zread_label_manager_connect(struct zserv *client,
1826 struct stream *msg, vrf_id_t vrf_id)
1827 {
1828 struct stream *s;
1829 /* type of protocol (lib/zebra.h) */
1830 uint8_t proto;
1831 unsigned short instance;
1832
1833 /* Get input stream. */
1834 s = msg;
1835
1836 /* Get data. */
1837 STREAM_GETC(s, proto);
1838 STREAM_GETW(s, instance);
1839
1840 /* accept only dynamic routing protocols */
1841 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1842 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1843 "client %d has wrong protocol %s", client->sock,
1844 zebra_route_string(proto));
1845 if (client->is_synchronous)
1846 zsend_label_manager_connect_response(client, vrf_id, 1);
1847 return;
1848 }
1849 zlog_notice("client %d with vrf %u instance %u connected as %s",
1850 client->sock, vrf_id, instance, zebra_route_string(proto));
1851 client->proto = proto;
1852 client->instance = instance;
1853
1854 /*
1855 * Release previous labels of same protocol and instance.
1856 * This is done in case it restarted from an unexpected shutdown.
1857 */
1858 release_daemon_label_chunks(client);
1859
1860 zlog_debug(
1861 " Label Manager client connected: sock %d, proto %s, vrf %u instance %u",
1862 client->sock, zebra_route_string(proto), vrf_id, instance);
1863 /* send response back */
1864 if (client->is_synchronous)
1865 zsend_label_manager_connect_response(client, vrf_id, 0);
1866
1867 stream_failure:
1868 return;
1869 }
1870
1871 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
1872 vrf_id_t vrf_id)
1873 {
1874 struct stream *s;
1875 uint8_t keep;
1876 uint32_t size;
1877 struct label_manager_chunk *lmc;
1878 uint8_t proto;
1879 unsigned short instance;
1880
1881 /* Get input stream. */
1882 s = msg;
1883
1884 /* Get data. */
1885 STREAM_GETC(s, proto);
1886 STREAM_GETW(s, instance);
1887 STREAM_GETC(s, keep);
1888 STREAM_GETL(s, size);
1889
1890 lmc = assign_label_chunk(proto, instance, keep, size);
1891 if (!lmc)
1892 flog_err(
1893 EC_ZEBRA_LM_CANNOT_ASSIGN_CHUNK,
1894 "Unable to assign Label Chunk of size %u to %s instance %u",
1895 size, zebra_route_string(proto), instance);
1896 else
1897 zlog_debug("Assigned Label Chunk %u - %u to %s instance %u",
1898 lmc->start, lmc->end,
1899 zebra_route_string(proto), instance);
1900 /* send response back */
1901 zsend_assign_label_chunk_response(client, vrf_id, lmc);
1902
1903 stream_failure:
1904 return;
1905 }
1906
1907 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
1908 {
1909 struct stream *s;
1910 uint32_t start, end;
1911 uint8_t proto;
1912 unsigned short instance;
1913
1914 /* Get input stream. */
1915 s = msg;
1916
1917 /* Get data. */
1918 STREAM_GETC(s, proto);
1919 STREAM_GETW(s, instance);
1920 STREAM_GETL(s, start);
1921 STREAM_GETL(s, end);
1922
1923 release_label_chunk(proto, instance, start, end);
1924
1925 stream_failure:
1926 return;
1927 }
1928 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
1929 {
1930 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
1931 client->is_synchronous = hdr->command ==
1932 ZEBRA_LABEL_MANAGER_CONNECT;
1933
1934 /* external label manager */
1935 if (lm_is_external)
1936 zread_relay_label_manager_request(hdr->command, client, msg,
1937 zvrf_id(zvrf));
1938 /* this is a label manager */
1939 else {
1940 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT ||
1941 hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC)
1942 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
1943 else {
1944 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
1945 zread_get_label_chunk(client, msg,
1946 zvrf_id(zvrf));
1947 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
1948 zread_release_label_chunk(client, msg);
1949 }
1950 }
1951 }
1952
1953 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
1954 vrf_id_t vrf_id)
1955 {
1956 struct stream *s;
1957 uint32_t size;
1958 struct table_manager_chunk *tmc;
1959
1960 /* Get input stream. */
1961 s = msg;
1962
1963 /* Get data. */
1964 STREAM_GETL(s, size);
1965
1966 tmc = assign_table_chunk(client->proto, client->instance, size);
1967 if (!tmc)
1968 flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK,
1969 "%s: Unable to assign Table Chunk of size %u",
1970 __func__, size);
1971 else
1972 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
1973 tmc->end);
1974 /* send response back */
1975 zsend_assign_table_chunk_response(client, vrf_id, tmc);
1976
1977 stream_failure:
1978 return;
1979 }
1980
1981 static void zread_release_table_chunk(struct zserv *client, struct stream *msg)
1982 {
1983 struct stream *s;
1984 uint32_t start, end;
1985
1986 /* Get input stream. */
1987 s = msg;
1988
1989 /* Get data. */
1990 STREAM_GETL(s, start);
1991 STREAM_GETL(s, end);
1992
1993 release_table_chunk(client->proto, client->instance, start, end);
1994
1995 stream_failure:
1996 return;
1997 }
1998
1999 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2000 {
2001 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
2002 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2003 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2004 else {
2005 /* Sanity: don't allow 'unidentified' requests */
2006 if (!client->proto) {
2007 flog_err(
2008 EC_ZEBRA_TM_ALIENS,
2009 "Got table request from an unidentified client");
2010 return;
2011 }
2012 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2013 zread_get_table_chunk(client, msg, zvrf_id(zvrf));
2014 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2015 zread_release_table_chunk(client, msg);
2016 }
2017 }
2018
2019 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2020 {
2021 struct stream *s;
2022 char ifname[IF_NAMESIZE];
2023 ifindex_t ifindex;
2024 int type;
2025 int af;
2026 union g_addr nexthop;
2027 uint32_t local_label;
2028 uint32_t remote_label;
2029 uint8_t flags;
2030 union pw_protocol_fields data;
2031 uint8_t protocol;
2032 struct zebra_pw *pw;
2033
2034 /* Get input stream. */
2035 s = msg;
2036
2037 /* Get data. */
2038 STREAM_GET(ifname, s, IF_NAMESIZE);
2039 STREAM_GETL(s, ifindex);
2040 STREAM_GETL(s, type);
2041 STREAM_GETL(s, af);
2042 switch (af) {
2043 case AF_INET:
2044 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
2045 break;
2046 case AF_INET6:
2047 STREAM_GET(&nexthop.ipv6, s, 16);
2048 break;
2049 default:
2050 return;
2051 }
2052 STREAM_GETL(s, local_label);
2053 STREAM_GETL(s, remote_label);
2054 STREAM_GETC(s, flags);
2055 STREAM_GET(&data, s, sizeof(data));
2056 protocol = client->proto;
2057
2058 pw = zebra_pw_find(zvrf, ifname);
2059 switch (hdr->command) {
2060 case ZEBRA_PW_ADD:
2061 if (pw) {
2062 flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS,
2063 "%s: pseudowire %s already exists [%s]",
2064 __func__, ifname,
2065 zserv_command_string(hdr->command));
2066 return;
2067 }
2068
2069 zebra_pw_add(zvrf, ifname, protocol, client);
2070 break;
2071 case ZEBRA_PW_DELETE:
2072 if (!pw) {
2073 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2074 "%s: pseudowire %s not found [%s]", __func__,
2075 ifname, zserv_command_string(hdr->command));
2076 return;
2077 }
2078
2079 zebra_pw_del(zvrf, pw);
2080 break;
2081 case ZEBRA_PW_SET:
2082 case ZEBRA_PW_UNSET:
2083 if (!pw) {
2084 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2085 "%s: pseudowire %s not found [%s]", __func__,
2086 ifname, zserv_command_string(hdr->command));
2087 return;
2088 }
2089
2090 switch (hdr->command) {
2091 case ZEBRA_PW_SET:
2092 pw->enabled = 1;
2093 break;
2094 case ZEBRA_PW_UNSET:
2095 pw->enabled = 0;
2096 break;
2097 }
2098
2099 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
2100 remote_label, flags, &data);
2101 break;
2102 }
2103
2104 stream_failure:
2105 return;
2106 }
2107
2108 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
2109 {
2110 struct interface *master;
2111 struct interface *slave;
2112 struct stream *s = msg;
2113 int ifindex;
2114 vrf_id_t vrf_id;
2115
2116 STREAM_GETL(s, vrf_id);
2117 STREAM_GETL(s, ifindex);
2118 master = if_lookup_by_index(ifindex, vrf_id);
2119
2120 STREAM_GETL(s, vrf_id);
2121 STREAM_GETL(s, ifindex);
2122 slave = if_lookup_by_index(ifindex, vrf_id);
2123
2124 if (!master || !slave)
2125 return;
2126
2127 kernel_interface_set_master(master, slave);
2128
2129 stream_failure:
2130 return;
2131 }
2132
2133
2134 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
2135 {
2136 struct interface *ifp;
2137 mpls_label_t nlabel;
2138 afi_t afi;
2139 struct stream *s;
2140 struct zebra_vrf *def_zvrf;
2141 enum lsp_types_t ltype;
2142
2143 s = msg;
2144 STREAM_GETL(s, nlabel);
2145 STREAM_GETC(s, afi);
2146 if (nlabel == zvrf->label[afi]) {
2147 /*
2148 * Nothing to do here move along
2149 */
2150 return;
2151 }
2152
2153 STREAM_GETC(s, ltype);
2154
2155 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
2156 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
2157 else
2158 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
2159
2160 if (!ifp) {
2161 zlog_debug("Unable to find specified Interface for %s",
2162 zvrf->vrf->name);
2163 return;
2164 }
2165
2166 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
2167
2168 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
2169 afi_t scrubber;
2170 bool really_remove;
2171
2172 really_remove = true;
2173 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
2174 if (scrubber == afi)
2175 continue;
2176
2177 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
2178 continue;
2179
2180 if (zvrf->label[afi] == zvrf->label[scrubber]) {
2181 really_remove = false;
2182 break;
2183 }
2184 }
2185
2186 if (really_remove)
2187 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
2188 NEXTHOP_TYPE_IFINDEX, NULL,
2189 ifp->ifindex);
2190 }
2191
2192 if (nlabel != MPLS_LABEL_NONE)
2193 mpls_lsp_install(def_zvrf, ltype, nlabel,
2194 MPLS_LABEL_IMPLICIT_NULL, NEXTHOP_TYPE_IFINDEX,
2195 NULL, ifp->ifindex);
2196
2197 zvrf->label[afi] = nlabel;
2198 stream_failure:
2199 return;
2200 }
2201
2202 static inline void zread_rule(ZAPI_HANDLER_ARGS)
2203 {
2204 struct zebra_pbr_rule zpr;
2205 struct stream *s;
2206 uint32_t total, i;
2207 ifindex_t ifindex;
2208
2209 s = msg;
2210 STREAM_GETL(s, total);
2211
2212 for (i = 0; i < total; i++) {
2213 memset(&zpr, 0, sizeof(zpr));
2214
2215 zpr.sock = client->sock;
2216 zpr.rule.vrf_id = hdr->vrf_id;
2217 STREAM_GETL(s, zpr.rule.seq);
2218 STREAM_GETL(s, zpr.rule.priority);
2219 STREAM_GETL(s, zpr.rule.unique);
2220 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
2221 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
2222 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
2223 prefix_blen(&zpr.rule.filter.src_ip));
2224 STREAM_GETW(s, zpr.rule.filter.src_port);
2225 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
2226 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
2227 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
2228 prefix_blen(&zpr.rule.filter.dst_ip));
2229 STREAM_GETW(s, zpr.rule.filter.dst_port);
2230 STREAM_GETL(s, zpr.rule.filter.fwmark);
2231 STREAM_GETL(s, zpr.rule.action.table);
2232 STREAM_GETL(s, ifindex);
2233
2234 if (ifindex) {
2235 zpr.ifp = if_lookup_by_index_per_ns(
2236 zvrf->zns,
2237 ifindex);
2238 if (!zpr.ifp) {
2239 zlog_debug("Failed to lookup ifindex: %u",
2240 ifindex);
2241 return;
2242 }
2243 }
2244
2245 if (!is_default_prefix(&zpr.rule.filter.src_ip))
2246 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
2247
2248 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
2249 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
2250
2251 if (zpr.rule.filter.src_port)
2252 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
2253
2254 if (zpr.rule.filter.dst_port)
2255 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
2256
2257 if (zpr.rule.filter.fwmark)
2258 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
2259
2260 zpr.vrf_id = zvrf->vrf->vrf_id;
2261 if (hdr->command == ZEBRA_RULE_ADD)
2262 zebra_pbr_add_rule(&zpr);
2263 else
2264 zebra_pbr_del_rule(&zpr);
2265 }
2266
2267 stream_failure:
2268 return;
2269 }
2270
2271 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
2272 {
2273 struct zebra_pbr_ipset zpi;
2274 struct stream *s;
2275 uint32_t total, i;
2276
2277 s = msg;
2278 STREAM_GETL(s, total);
2279
2280 for (i = 0; i < total; i++) {
2281 memset(&zpi, 0, sizeof(zpi));
2282
2283 zpi.sock = client->sock;
2284 zpi.vrf_id = zvrf->vrf->vrf_id;
2285 STREAM_GETL(s, zpi.unique);
2286 STREAM_GETL(s, zpi.type);
2287 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2288
2289 if (hdr->command == ZEBRA_IPSET_CREATE)
2290 zebra_pbr_create_ipset(&zpi);
2291 else
2292 zebra_pbr_destroy_ipset(&zpi);
2293 }
2294
2295 stream_failure:
2296 return;
2297 }
2298
2299 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
2300 {
2301 struct zebra_pbr_ipset_entry zpi;
2302 struct zebra_pbr_ipset ipset;
2303 struct stream *s;
2304 uint32_t total, i;
2305
2306 s = msg;
2307 STREAM_GETL(s, total);
2308
2309 for (i = 0; i < total; i++) {
2310 memset(&zpi, 0, sizeof(zpi));
2311 memset(&ipset, 0, sizeof(ipset));
2312
2313 zpi.sock = client->sock;
2314 STREAM_GETL(s, zpi.unique);
2315 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2316 STREAM_GETC(s, zpi.src.family);
2317 STREAM_GETC(s, zpi.src.prefixlen);
2318 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
2319 STREAM_GETC(s, zpi.dst.family);
2320 STREAM_GETC(s, zpi.dst.prefixlen);
2321 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
2322
2323 STREAM_GETW(s, zpi.src_port_min);
2324 STREAM_GETW(s, zpi.src_port_max);
2325 STREAM_GETW(s, zpi.dst_port_min);
2326 STREAM_GETW(s, zpi.dst_port_max);
2327 STREAM_GETC(s, zpi.proto);
2328 if (!is_default_prefix(&zpi.src))
2329 zpi.filter_bm |= PBR_FILTER_SRC_IP;
2330
2331 if (!is_default_prefix(&zpi.dst))
2332 zpi.filter_bm |= PBR_FILTER_DST_IP;
2333 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2334 zpi.filter_bm |= PBR_FILTER_DST_PORT;
2335 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2336 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
2337 if (zpi.dst_port_max != 0)
2338 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
2339 if (zpi.src_port_max != 0)
2340 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
2341 if (zpi.proto != 0)
2342 zpi.filter_bm |= PBR_FILTER_PROTO;
2343
2344 /* calculate backpointer */
2345 zpi.backpointer =
2346 zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
2347 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
2348 zebra_pbr_add_ipset_entry(&zpi);
2349 else
2350 zebra_pbr_del_ipset_entry(&zpi);
2351 }
2352
2353 stream_failure:
2354 return;
2355 }
2356
2357 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
2358 {
2359 struct zebra_pbr_iptable zpi;
2360 struct stream *s;
2361
2362 s = msg;
2363
2364 memset(&zpi, 0, sizeof(zpi));
2365
2366 zpi.interface_name_list = list_new();
2367 zpi.sock = client->sock;
2368 zpi.vrf_id = zvrf->vrf->vrf_id;
2369 STREAM_GETL(s, zpi.unique);
2370 STREAM_GETL(s, zpi.type);
2371 STREAM_GETL(s, zpi.filter_bm);
2372 STREAM_GETL(s, zpi.action);
2373 STREAM_GETL(s, zpi.fwmark);
2374 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2375 STREAM_GETW(s, zpi.pkt_len_min);
2376 STREAM_GETW(s, zpi.pkt_len_max);
2377 STREAM_GETW(s, zpi.tcp_flags);
2378 STREAM_GETW(s, zpi.tcp_mask_flags);
2379 STREAM_GETC(s, zpi.dscp_value);
2380 STREAM_GETC(s, zpi.fragment);
2381 STREAM_GETL(s, zpi.nb_interface);
2382 zebra_pbr_iptable_update_interfacelist(s, &zpi);
2383
2384 if (hdr->command == ZEBRA_IPTABLE_ADD)
2385 zebra_pbr_add_iptable(&zpi);
2386 else
2387 zebra_pbr_del_iptable(&zpi);
2388 stream_failure:
2389 return;
2390 }
2391
2392 void (*zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
2393 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
2394 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
2395 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
2396 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
2397 [ZEBRA_ROUTE_ADD] = zread_route_add,
2398 [ZEBRA_ROUTE_DELETE] = zread_route_del,
2399 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
2400 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
2401 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
2402 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
2403 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
2404 [ZEBRA_HELLO] = zread_hello,
2405 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
2406 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
2407 [ZEBRA_IMPORT_ROUTE_REGISTER] = zread_rnh_register,
2408 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = zread_rnh_unregister,
2409 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
2410 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
2411 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
2412 #if HAVE_BFDD > 0
2413 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
2414 #endif /* HAVE_BFDD */
2415 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
2416 [ZEBRA_VRF_LABEL] = zread_vrf_label,
2417 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
2418 #if defined(HAVE_RTADV)
2419 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
2420 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
2421 #else
2422 [ZEBRA_INTERFACE_ENABLE_RADV] = NULL,
2423 [ZEBRA_INTERFACE_DISABLE_RADV] = NULL,
2424 #endif
2425 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels,
2426 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels,
2427 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
2428 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
2429 [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request,
2430 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
2431 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
2432 [ZEBRA_FEC_REGISTER] = zread_fec_register,
2433 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
2434 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
2435 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
2436 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
2437 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add,
2438 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del,
2439 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
2440 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
2441 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
2442 [ZEBRA_PW_ADD] = zread_pseudowire,
2443 [ZEBRA_PW_DELETE] = zread_pseudowire,
2444 [ZEBRA_PW_SET] = zread_pseudowire,
2445 [ZEBRA_PW_UNSET] = zread_pseudowire,
2446 [ZEBRA_RULE_ADD] = zread_rule,
2447 [ZEBRA_RULE_DELETE] = zread_rule,
2448 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
2449 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
2450 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
2451 [ZEBRA_IPSET_CREATE] = zread_ipset,
2452 [ZEBRA_IPSET_DESTROY] = zread_ipset,
2453 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
2454 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
2455 [ZEBRA_IPTABLE_ADD] = zread_iptable,
2456 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
2457 [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control,
2458 };
2459
2460 #if defined(HANDLE_ZAPI_FUZZING)
2461 extern struct zebra_privs_t zserv_privs;
2462
2463 static void zserv_write_incoming(struct stream *orig, uint16_t command)
2464 {
2465 char fname[MAXPATHLEN];
2466 struct stream *copy;
2467 int fd = -1;
2468
2469 copy = stream_dup(orig);
2470 stream_set_getp(copy, 0);
2471
2472 snprintf(fname, MAXPATHLEN, "%s/%u", DAEMON_VTY_DIR, command);
2473
2474 frr_elevate_privs(&zserv_privs) {
2475 fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
2476 }
2477 stream_flush(copy, fd);
2478 close(fd);
2479 stream_free(copy);
2480 }
2481 #endif
2482
2483 void zserv_handle_commands(struct zserv *client, struct stream *msg)
2484 {
2485 struct zmsghdr hdr;
2486 struct zebra_vrf *zvrf;
2487
2488 zapi_parse_header(msg, &hdr);
2489
2490 #if defined(HANDLE_ZAPI_FUZZING)
2491 zserv_write_incoming(msg, hdr.command);
2492 #endif
2493
2494 hdr.length -= ZEBRA_HEADER_SIZE;
2495
2496 /* lookup vrf */
2497 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
2498 if (!zvrf) {
2499 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
2500 zlog_debug("ZAPI message specifies unknown VRF: %d",
2501 hdr.vrf_id);
2502 return;
2503 }
2504
2505 if (hdr.command >= array_size(zserv_handlers)
2506 || zserv_handlers[hdr.command] == NULL)
2507 zlog_info("Zebra received unknown command %d", hdr.command);
2508 else
2509 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
2510 }
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