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[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_putl(s, nexthop->vrf_id);
122 stream_putc(s, nexthop->type);
123 switch (nexthop->type) {
124 case NEXTHOP_TYPE_IPV4:
125 case NEXTHOP_TYPE_IPV4_IFINDEX:
126 stream_put_in_addr(s, &nexthop->gate.ipv4);
127 stream_putl(s, nexthop->ifindex);
128 break;
129 case NEXTHOP_TYPE_IPV6:
130 stream_put(s, &nexthop->gate.ipv6, 16);
131 break;
132 case NEXTHOP_TYPE_IPV6_IFINDEX:
133 stream_put(s, &nexthop->gate.ipv6, 16);
134 stream_putl(s, nexthop->ifindex);
135 break;
136 case NEXTHOP_TYPE_IFINDEX:
137 stream_putl(s, nexthop->ifindex);
138 break;
139 default:
140 /* do nothing */
141 break;
142 }
143 return 1;
144 }
145
146 /* Send handlers ----------------------------------------------------------- */
147
148 /* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
149 /*
150 * This function is called in the following situations:
151 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
152 * from the client.
153 * - at startup, when zebra figures out the available interfaces
154 * - when an interface is added (where support for
155 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
156 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
157 * received)
158 */
159 int zsend_interface_add(struct zserv *client, struct interface *ifp)
160 {
161 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
162
163 zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf_id);
164 zserv_encode_interface(s, ifp);
165
166 client->ifadd_cnt++;
167 return zserv_send_message(client, s);
168 }
169
170 /* Interface deletion from zebra daemon. */
171 int zsend_interface_delete(struct zserv *client, struct interface *ifp)
172 {
173 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
174
175 zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf_id);
176 zserv_encode_interface(s, ifp);
177
178 client->ifdel_cnt++;
179 return zserv_send_message(client, s);
180 }
181
182 int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf)
183 {
184 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
185
186 zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf));
187 zserv_encode_vrf(s, zvrf);
188
189 client->vrfadd_cnt++;
190 return zserv_send_message(client, s);
191 }
192
193 /* VRF deletion from zebra daemon. */
194 int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf)
195
196 {
197 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
198
199 zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf));
200 zserv_encode_vrf(s, zvrf);
201
202 client->vrfdel_cnt++;
203 return zserv_send_message(client, s);
204 }
205
206 int zsend_interface_link_params(struct zserv *client, struct interface *ifp)
207 {
208 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
209
210 /* Check this client need interface information. */
211 if (!client->ifinfo) {
212 stream_free(s);
213 return 0;
214 }
215
216 if (!ifp->link_params) {
217 stream_free(s);
218 return 0;
219 }
220
221 zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->vrf_id);
222
223 /* Add Interface Index */
224 stream_putl(s, ifp->ifindex);
225
226 /* Then TE Link Parameters */
227 if (zebra_interface_link_params_write(s, ifp) == 0) {
228 stream_free(s);
229 return 0;
230 }
231
232 /* Write packet size. */
233 stream_putw_at(s, 0, stream_get_endp(s));
234
235 return zserv_send_message(client, s);
236 }
237
238 /* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or
239 * ZEBRA_INTERFACE_ADDRESS_DELETE to the client.
240 *
241 * A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations:
242 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
243 * from the client, after the ZEBRA_INTERFACE_ADD has been
244 * sent from zebra to the client
245 * - redistribute new address info to all clients in the following situations
246 * - at startup, when zebra figures out the available interfaces
247 * - when an interface is added (where support for
248 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
249 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
250 * received)
251 * - for the vty commands "ip address A.B.C.D/M [<label LINE>]"
252 * and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M"
253 * - when an RTM_NEWADDR message is received from the kernel,
254 *
255 * The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE:
256 *
257 * zsend_interface_address(DELETE)
258 * ^
259 * |
260 * zebra_interface_address_delete_update
261 * ^ ^ ^
262 * | | if_delete_update
263 * | |
264 * ip_address_uninstall connected_delete_ipv4
265 * [ipv6_addresss_uninstall] [connected_delete_ipv6]
266 * ^ ^
267 * | |
268 * | RTM_NEWADDR on routing/netlink socket
269 * |
270 * vty commands:
271 * "no ip address A.B.C.D/M [label LINE]"
272 * "no ip address A.B.C.D/M"
273 * ["no ipv6 address X:X::X:X/M"]
274 *
275 */
276 int zsend_interface_address(int cmd, struct zserv *client,
277 struct interface *ifp, struct connected *ifc)
278 {
279 int blen;
280 struct prefix *p;
281 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
282
283 zclient_create_header(s, cmd, ifp->vrf_id);
284 stream_putl(s, ifp->ifindex);
285
286 /* Interface address flag. */
287 stream_putc(s, ifc->flags);
288
289 /* Prefix information. */
290 p = ifc->address;
291 stream_putc(s, p->family);
292 blen = prefix_blen(p);
293 stream_put(s, &p->u.prefix, blen);
294
295 /*
296 * XXX gnu version does not send prefixlen for
297 * ZEBRA_INTERFACE_ADDRESS_DELETE
298 * but zebra_interface_address_delete_read() in the gnu version
299 * expects to find it
300 */
301 stream_putc(s, p->prefixlen);
302
303 /* Destination. */
304 p = ifc->destination;
305 if (p)
306 stream_put(s, &p->u.prefix, blen);
307 else
308 stream_put(s, NULL, blen);
309
310 /* Write packet size. */
311 stream_putw_at(s, 0, stream_get_endp(s));
312
313 client->connected_rt_add_cnt++;
314 return zserv_send_message(client, s);
315 }
316
317 static int zsend_interface_nbr_address(int cmd, struct zserv *client,
318 struct interface *ifp,
319 struct nbr_connected *ifc)
320 {
321 int blen;
322 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
323 struct prefix *p;
324
325 zclient_create_header(s, cmd, ifp->vrf_id);
326 stream_putl(s, ifp->ifindex);
327
328 /* Prefix information. */
329 p = ifc->address;
330 stream_putc(s, p->family);
331 blen = prefix_blen(p);
332 stream_put(s, &p->u.prefix, blen);
333
334 /*
335 * XXX gnu version does not send prefixlen for
336 * ZEBRA_INTERFACE_ADDRESS_DELETE
337 * but zebra_interface_address_delete_read() in the gnu version
338 * expects to find it
339 */
340 stream_putc(s, p->prefixlen);
341
342 /* Write packet size. */
343 stream_putw_at(s, 0, stream_get_endp(s));
344
345 return zserv_send_message(client, s);
346 }
347
348 /* Interface address addition. */
349 static void zebra_interface_nbr_address_add_update(struct interface *ifp,
350 struct nbr_connected *ifc)
351 {
352 struct listnode *node, *nnode;
353 struct zserv *client;
354 struct prefix *p;
355
356 if (IS_ZEBRA_DEBUG_EVENT) {
357 char buf[INET6_ADDRSTRLEN];
358
359 p = ifc->address;
360 zlog_debug(
361 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_ADD %s/%d on %s",
362 inet_ntop(p->family, &p->u.prefix, buf,
363 INET6_ADDRSTRLEN),
364 p->prefixlen, ifc->ifp->name);
365 }
366
367 for (ALL_LIST_ELEMENTS(zebrad.client_list, node, nnode, client))
368 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
369 client, ifp, ifc);
370 }
371
372 /* Interface address deletion. */
373 static void zebra_interface_nbr_address_delete_update(struct interface *ifp,
374 struct nbr_connected *ifc)
375 {
376 struct listnode *node, *nnode;
377 struct zserv *client;
378 struct prefix *p;
379
380 if (IS_ZEBRA_DEBUG_EVENT) {
381 char buf[INET6_ADDRSTRLEN];
382
383 p = ifc->address;
384 zlog_debug(
385 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_DELETE %s/%d on %s",
386 inet_ntop(p->family, &p->u.prefix, buf,
387 INET6_ADDRSTRLEN),
388 p->prefixlen, ifc->ifp->name);
389 }
390
391 for (ALL_LIST_ELEMENTS(zebrad.client_list, node, nnode, client))
392 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE,
393 client, ifp, ifc);
394 }
395
396 /* Send addresses on interface to client */
397 int zsend_interface_addresses(struct zserv *client, struct interface *ifp)
398 {
399 struct listnode *cnode, *cnnode;
400 struct connected *c;
401 struct nbr_connected *nc;
402
403 /* Send interface addresses. */
404 for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode, c)) {
405 if (!CHECK_FLAG(c->conf, ZEBRA_IFC_REAL))
406 continue;
407
408 if (zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD, client,
409 ifp, c)
410 < 0)
411 return -1;
412 }
413
414 /* Send interface neighbors. */
415 for (ALL_LIST_ELEMENTS(ifp->nbr_connected, cnode, cnnode, nc)) {
416 if (zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
417 client, ifp, nc)
418 < 0)
419 return -1;
420 }
421
422 return 0;
423 }
424
425 /* Notify client about interface moving from one VRF to another.
426 * Whether client is interested in old and new VRF is checked by caller.
427 */
428 int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
429 vrf_id_t vrf_id)
430 {
431 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
432
433 zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf_id);
434
435 /* Fill in the ifIndex of the interface and its new VRF (id) */
436 stream_putl(s, ifp->ifindex);
437 stream_putl(s, vrf_id);
438
439 /* Write packet size. */
440 stream_putw_at(s, 0, stream_get_endp(s));
441
442 client->if_vrfchg_cnt++;
443 return zserv_send_message(client, s);
444 }
445
446 /* Add new nbr connected IPv6 address */
447 void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address)
448 {
449 struct nbr_connected *ifc;
450 struct prefix p;
451
452 p.family = AF_INET6;
453 IPV6_ADDR_COPY(&p.u.prefix6, address);
454 p.prefixlen = IPV6_MAX_PREFIXLEN;
455
456 ifc = listnode_head(ifp->nbr_connected);
457 if (!ifc) {
458 /* new addition */
459 ifc = nbr_connected_new();
460 ifc->address = prefix_new();
461 ifc->ifp = ifp;
462 listnode_add(ifp->nbr_connected, ifc);
463 }
464
465 prefix_copy(ifc->address, &p);
466
467 zebra_interface_nbr_address_add_update(ifp, ifc);
468
469 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 1);
470 }
471
472 void nbr_connected_delete_ipv6(struct interface *ifp, struct in6_addr *address)
473 {
474 struct nbr_connected *ifc;
475 struct prefix p;
476
477 p.family = AF_INET6;
478 IPV6_ADDR_COPY(&p.u.prefix6, address);
479 p.prefixlen = IPV6_MAX_PREFIXLEN;
480
481 ifc = nbr_connected_check(ifp, &p);
482 if (!ifc)
483 return;
484
485 listnode_delete(ifp->nbr_connected, ifc);
486
487 zebra_interface_nbr_address_delete_update(ifp, ifc);
488
489 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 0);
490
491 nbr_connected_free(ifc);
492 }
493
494 /*
495 * The cmd passed to zsend_interface_update may be ZEBRA_INTERFACE_UP or
496 * ZEBRA_INTERFACE_DOWN.
497 *
498 * The ZEBRA_INTERFACE_UP message is sent from the zebra server to
499 * the clients in one of 2 situations:
500 * - an if_up is detected e.g., as a result of an RTM_IFINFO message
501 * - a vty command modifying the bandwidth of an interface is received.
502 * The ZEBRA_INTERFACE_DOWN message is sent when an if_down is detected.
503 */
504 int zsend_interface_update(int cmd, struct zserv *client, struct interface *ifp)
505 {
506 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
507
508 zclient_create_header(s, cmd, ifp->vrf_id);
509 zserv_encode_interface(s, ifp);
510
511 if (cmd == ZEBRA_INTERFACE_UP)
512 client->ifup_cnt++;
513 else
514 client->ifdown_cnt++;
515
516 return zserv_send_message(client, s);
517 }
518
519 int zsend_redistribute_route(int cmd, struct zserv *client,
520 const struct prefix *p,
521 const struct prefix *src_p, struct route_entry *re)
522 {
523 struct zapi_route api;
524 struct zapi_nexthop *api_nh;
525 struct nexthop *nexthop;
526 int count = 0;
527 afi_t afi;
528
529 memset(&api, 0, sizeof(api));
530 api.vrf_id = re->vrf_id;
531 api.type = re->type;
532 api.instance = re->instance;
533 api.flags = re->flags;
534
535 afi = family2afi(p->family);
536 switch (afi) {
537 case AFI_IP:
538 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
539 client->redist_v4_add_cnt++;
540 else
541 client->redist_v4_del_cnt++;
542 break;
543 case AFI_IP6:
544 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
545 client->redist_v6_add_cnt++;
546 else
547 client->redist_v6_del_cnt++;
548 break;
549 default:
550 break;
551 }
552
553 /* Prefix. */
554 api.prefix = *p;
555 if (src_p) {
556 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
557 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
558 }
559
560 /* Nexthops. */
561 if (re->nexthop_active_num) {
562 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
563 api.nexthop_num = re->nexthop_active_num;
564 }
565 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) {
566 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
567 continue;
568
569 api_nh = &api.nexthops[count];
570 api_nh->vrf_id = nexthop->vrf_id;
571 api_nh->type = nexthop->type;
572 switch (nexthop->type) {
573 case NEXTHOP_TYPE_BLACKHOLE:
574 api_nh->bh_type = nexthop->bh_type;
575 break;
576 case NEXTHOP_TYPE_IPV4:
577 api_nh->gate.ipv4 = nexthop->gate.ipv4;
578 break;
579 case NEXTHOP_TYPE_IPV4_IFINDEX:
580 api_nh->gate.ipv4 = nexthop->gate.ipv4;
581 api_nh->ifindex = nexthop->ifindex;
582 break;
583 case NEXTHOP_TYPE_IFINDEX:
584 api_nh->ifindex = nexthop->ifindex;
585 break;
586 case NEXTHOP_TYPE_IPV6:
587 api_nh->gate.ipv6 = nexthop->gate.ipv6;
588 break;
589 case NEXTHOP_TYPE_IPV6_IFINDEX:
590 api_nh->gate.ipv6 = nexthop->gate.ipv6;
591 api_nh->ifindex = nexthop->ifindex;
592 }
593 count++;
594 }
595
596 /* Attributes. */
597 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
598 api.distance = re->distance;
599 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
600 api.metric = re->metric;
601 if (re->tag) {
602 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
603 api.tag = re->tag;
604 }
605 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
606 api.mtu = re->mtu;
607
608 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
609
610 /* Encode route and send. */
611 if (zapi_route_encode(cmd, s, &api) < 0) {
612 stream_free(s);
613 return -1;
614 }
615
616 if (IS_ZEBRA_DEBUG_SEND) {
617 char buf_prefix[PREFIX_STRLEN];
618
619 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
620
621 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
622 __func__, zserv_command_string(cmd),
623 zebra_route_string(client->proto),
624 zebra_route_string(api.type), api.vrf_id,
625 buf_prefix);
626 }
627 return zserv_send_message(client, s);
628 }
629
630 /*
631 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
632 * nexthop is not found on mrib. Returns both route metric and protocol
633 * distance.
634 */
635 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
636 struct in_addr addr,
637 struct route_entry *re,
638 struct zebra_vrf *zvrf)
639 {
640 struct stream *s;
641 unsigned long nump;
642 uint8_t num;
643 struct nexthop *nexthop;
644
645 /* Get output stream. */
646 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
647 stream_reset(s);
648
649 /* Fill in result. */
650 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
651 stream_put_in_addr(s, &addr);
652
653 if (re) {
654 stream_putc(s, re->distance);
655 stream_putl(s, re->metric);
656 num = 0;
657 /* remember position for nexthop_num */
658 nump = stream_get_endp(s);
659 /* reserve room for nexthop_num */
660 stream_putc(s, 0);
661 /*
662 * Only non-recursive routes are elegible to resolve the
663 * nexthop we are looking up. Therefore, we will just iterate
664 * over the top chain of nexthops.
665 */
666 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next)
667 if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
668 num += zserv_encode_nexthop(s, nexthop);
669
670 /* store nexthop_num */
671 stream_putc_at(s, nump, num);
672 } else {
673 stream_putc(s, 0); /* distance */
674 stream_putl(s, 0); /* metric */
675 stream_putc(s, 0); /* nexthop_num */
676 }
677
678 stream_putw_at(s, 0, stream_get_endp(s));
679
680 return zserv_send_message(client, s);
681 }
682
683 /*
684 * Common utility send route notification, called from a path using a
685 * route_entry and from a path using a dataplane context.
686 */
687 static int route_notify_internal(const struct prefix *p, int type,
688 uint16_t instance, vrf_id_t vrf_id,
689 uint32_t table_id,
690 enum zapi_route_notify_owner note)
691 {
692 struct zserv *client;
693 struct stream *s;
694 uint8_t blen;
695
696 client = zserv_find_client(type, instance);
697 if (!client || !client->notify_owner) {
698 if (IS_ZEBRA_DEBUG_PACKET) {
699 char buff[PREFIX_STRLEN];
700
701 zlog_debug(
702 "Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
703 type, prefix2str(p, buff, sizeof(buff)),
704 table_id, note, vrf_id);
705 }
706 return 0;
707 }
708
709 if (IS_ZEBRA_DEBUG_PACKET) {
710 char buff[PREFIX_STRLEN];
711
712 zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
713 type, prefix2str(p, buff, sizeof(buff)),
714 table_id, note, vrf_id);
715 }
716
717 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
718 stream_reset(s);
719
720 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
721
722 stream_put(s, &note, sizeof(note));
723
724 stream_putc(s, p->family);
725
726 blen = prefix_blen(p);
727 stream_putc(s, p->prefixlen);
728 stream_put(s, &p->u.prefix, blen);
729
730 stream_putl(s, table_id);
731
732 stream_putw_at(s, 0, stream_get_endp(s));
733
734 return zserv_send_message(client, s);
735 }
736
737 int zsend_route_notify_owner(struct route_entry *re, const struct prefix *p,
738 enum zapi_route_notify_owner note)
739 {
740 return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
741 re->table, note));
742 }
743
744 /*
745 * Route-owner notification using info from dataplane update context.
746 */
747 int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx,
748 enum zapi_route_notify_owner note)
749 {
750 return (route_notify_internal(dplane_ctx_get_dest(ctx),
751 dplane_ctx_get_type(ctx),
752 dplane_ctx_get_instance(ctx),
753 dplane_ctx_get_vrf(ctx),
754 dplane_ctx_get_table(ctx),
755 note));
756 }
757
758 void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
759 enum zapi_rule_notify_owner note)
760 {
761 struct listnode *node;
762 struct zserv *client;
763 struct stream *s;
764
765 if (IS_ZEBRA_DEBUG_PACKET)
766 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
767 rule->rule.unique);
768
769 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
770 if (rule->sock == client->sock)
771 break;
772 }
773
774 if (!client)
775 return;
776
777 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
778
779 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
780 stream_put(s, &note, sizeof(note));
781 stream_putl(s, rule->rule.seq);
782 stream_putl(s, rule->rule.priority);
783 stream_putl(s, rule->rule.unique);
784 if (rule->ifp)
785 stream_putl(s, rule->ifp->ifindex);
786 else
787 stream_putl(s, 0);
788
789 stream_putw_at(s, 0, stream_get_endp(s));
790
791 zserv_send_message(client, s);
792 }
793
794 void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
795 enum zapi_ipset_notify_owner note)
796 {
797 struct listnode *node;
798 struct zserv *client;
799 struct stream *s;
800
801 if (IS_ZEBRA_DEBUG_PACKET)
802 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
803 ipset->unique);
804
805 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
806 if (ipset->sock == client->sock)
807 break;
808 }
809
810 if (!client)
811 return;
812
813 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
814
815 zclient_create_header(s, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
816 stream_put(s, &note, sizeof(note));
817 stream_putl(s, ipset->unique);
818 stream_put(s, ipset->ipset_name, ZEBRA_IPSET_NAME_SIZE);
819 stream_putw_at(s, 0, stream_get_endp(s));
820
821 zserv_send_message(client, s);
822 }
823
824 void zsend_ipset_entry_notify_owner(struct zebra_pbr_ipset_entry *ipset,
825 enum zapi_ipset_entry_notify_owner note)
826 {
827 struct listnode *node;
828 struct zserv *client;
829 struct stream *s;
830
831 if (IS_ZEBRA_DEBUG_PACKET)
832 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
833 ipset->unique);
834
835 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
836 if (ipset->sock == client->sock)
837 break;
838 }
839
840 if (!client)
841 return;
842
843 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
844
845 zclient_create_header(s, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
846 stream_put(s, &note, sizeof(note));
847 stream_putl(s, ipset->unique);
848 stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
849 stream_putw_at(s, 0, stream_get_endp(s));
850
851 zserv_send_message(client, s);
852 }
853
854 void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
855 enum zapi_iptable_notify_owner note)
856 {
857 struct listnode *node;
858 struct zserv *client;
859 struct stream *s;
860
861 if (IS_ZEBRA_DEBUG_PACKET)
862 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
863 iptable->unique);
864
865 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
866 if (iptable->sock == client->sock)
867 break;
868 }
869
870 if (!client)
871 return;
872
873 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
874
875 zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
876 stream_put(s, &note, sizeof(note));
877 stream_putl(s, iptable->unique);
878 stream_putw_at(s, 0, stream_get_endp(s));
879
880 zserv_send_message(client, s);
881 }
882
883 /* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
884 int zsend_router_id_update(struct zserv *client, struct prefix *p,
885 vrf_id_t vrf_id)
886 {
887 int blen;
888
889 /* Check this client need interface information. */
890 if (!vrf_bitmap_check(client->ridinfo, vrf_id))
891 return 0;
892
893 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
894
895 /* Message type. */
896 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
897
898 /* Prefix information. */
899 stream_putc(s, p->family);
900 blen = prefix_blen(p);
901 stream_put(s, &p->u.prefix, blen);
902 stream_putc(s, p->prefixlen);
903
904 /* Write packet size. */
905 stream_putw_at(s, 0, stream_get_endp(s));
906
907 return zserv_send_message(client, s);
908 }
909
910 /*
911 * Function used by Zebra to send a PW status update to LDP daemon
912 */
913 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
914 {
915 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
916
917 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
918 stream_write(s, pw->ifname, IF_NAMESIZE);
919 stream_putl(s, pw->ifindex);
920 stream_putl(s, pw->status);
921
922 /* Put length at the first point of the stream. */
923 stream_putw_at(s, 0, stream_get_endp(s));
924
925 return zserv_send_message(client, s);
926 }
927
928 /* Send response to a get label chunk request to client */
929 static int zsend_assign_label_chunk_response(struct zserv *client,
930 vrf_id_t vrf_id,
931 struct label_manager_chunk *lmc)
932 {
933 int ret;
934 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
935
936 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
937
938 if (lmc) {
939 /* proto */
940 stream_putc(s, lmc->proto);
941 /* instance */
942 stream_putw(s, lmc->instance);
943 /* keep */
944 stream_putc(s, lmc->keep);
945 /* start and end labels */
946 stream_putl(s, lmc->start);
947 stream_putl(s, lmc->end);
948 }
949
950 /* Write packet size. */
951 stream_putw_at(s, 0, stream_get_endp(s));
952
953 ret = writen(client->sock, s->data, stream_get_endp(s));
954 stream_free(s);
955 return ret;
956 }
957
958 /* Send response to a label manager connect request to client */
959 static int zsend_label_manager_connect_response(struct zserv *client,
960 vrf_id_t vrf_id,
961 unsigned short result)
962 {
963 int ret;
964 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
965
966 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
967
968 /* proto */
969 stream_putc(s, client->proto);
970
971 /* instance */
972 stream_putw(s, client->instance);
973
974 /* result */
975 stream_putc(s, result);
976
977 /* Write packet size. */
978 stream_putw_at(s, 0, stream_get_endp(s));
979
980 ret = writen(client->sock, s->data, stream_get_endp(s));
981 stream_free(s);
982
983 return ret;
984 }
985
986 /* Send response to a get table chunk request to client */
987 static int zsend_assign_table_chunk_response(struct zserv *client,
988 vrf_id_t vrf_id,
989 struct table_manager_chunk *tmc)
990 {
991 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
992
993 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
994
995 if (tmc) {
996 /* start and end labels */
997 stream_putl(s, tmc->start);
998 stream_putl(s, tmc->end);
999 }
1000
1001 /* Write packet size. */
1002 stream_putw_at(s, 0, stream_get_endp(s));
1003
1004 return zserv_send_message(client, s);
1005 }
1006
1007 static int zsend_table_manager_connect_response(struct zserv *client,
1008 vrf_id_t vrf_id,
1009 uint16_t result)
1010 {
1011 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1012
1013 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
1014
1015 /* result */
1016 stream_putc(s, result);
1017
1018 stream_putw_at(s, 0, stream_get_endp(s));
1019
1020 return zserv_send_message(client, s);
1021 }
1022
1023 /* Inbound message handling ------------------------------------------------ */
1024
1025 int cmd2type[] = {
1026 [ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
1027 [ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
1028 [ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
1029 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
1030 };
1031
1032 /* Nexthop register */
1033 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1034 {
1035 struct rnh *rnh;
1036 struct stream *s;
1037 struct prefix p;
1038 unsigned short l = 0;
1039 uint8_t flags = 0;
1040 uint16_t type = cmd2type[hdr->command];
1041 bool exist;
1042
1043 if (IS_ZEBRA_DEBUG_NHT)
1044 zlog_debug(
1045 "rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
1046 zebra_route_string(client->proto), hdr->length,
1047 (type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
1048 zvrf->vrf->vrf_id);
1049
1050 s = msg;
1051
1052 client->nh_reg_time = monotime(NULL);
1053
1054 while (l < hdr->length) {
1055 STREAM_GETC(s, flags);
1056 STREAM_GETW(s, p.family);
1057 STREAM_GETC(s, p.prefixlen);
1058 l += 4;
1059 if (p.family == AF_INET) {
1060 client->v4_nh_watch_add_cnt++;
1061 if (p.prefixlen > IPV4_MAX_BITLEN) {
1062 zlog_debug(
1063 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1064 __PRETTY_FUNCTION__, p.prefixlen);
1065 return;
1066 }
1067 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1068 l += IPV4_MAX_BYTELEN;
1069 } else if (p.family == AF_INET6) {
1070 client->v6_nh_watch_add_cnt++;
1071 if (p.prefixlen > IPV6_MAX_BITLEN) {
1072 zlog_debug(
1073 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1074 __PRETTY_FUNCTION__, p.prefixlen);
1075 return;
1076 }
1077 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1078 l += IPV6_MAX_BYTELEN;
1079 } else {
1080 flog_err(
1081 EC_ZEBRA_UNKNOWN_FAMILY,
1082 "rnh_register: Received unknown family type %d\n",
1083 p.family);
1084 return;
1085 }
1086 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
1087 if (!rnh)
1088 return;
1089
1090 if (type == RNH_NEXTHOP_TYPE) {
1091 if (flags
1092 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1093 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1094 else if (!flags
1095 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1096 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1097 } else if (type == RNH_IMPORT_CHECK_TYPE) {
1098 if (flags
1099 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
1100 SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1101 else if (!flags
1102 && CHECK_FLAG(rnh->flags,
1103 ZEBRA_NHT_EXACT_MATCH))
1104 UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1105 }
1106
1107 zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
1108 /* Anything not AF_INET/INET6 has been filtered out above */
1109 if (!exist)
1110 zebra_evaluate_rnh(zvrf, p.family, 1, type, &p);
1111 }
1112
1113 stream_failure:
1114 return;
1115 }
1116
1117 /* Nexthop register */
1118 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1119 {
1120 struct rnh *rnh;
1121 struct stream *s;
1122 struct prefix p;
1123 unsigned short l = 0;
1124 uint16_t type = cmd2type[hdr->command];
1125
1126 if (IS_ZEBRA_DEBUG_NHT)
1127 zlog_debug(
1128 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
1129 zebra_route_string(client->proto), hdr->length,
1130 zvrf->vrf->vrf_id);
1131
1132 s = msg;
1133
1134 while (l < hdr->length) {
1135 uint8_t flags;
1136
1137 STREAM_GETC(s, flags);
1138 if (flags != 0)
1139 goto stream_failure;
1140
1141 STREAM_GETW(s, p.family);
1142 STREAM_GETC(s, p.prefixlen);
1143 l += 4;
1144 if (p.family == AF_INET) {
1145 client->v4_nh_watch_rem_cnt++;
1146 if (p.prefixlen > IPV4_MAX_BITLEN) {
1147 zlog_debug(
1148 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1149 __PRETTY_FUNCTION__, p.prefixlen);
1150 return;
1151 }
1152 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1153 l += IPV4_MAX_BYTELEN;
1154 } else if (p.family == AF_INET6) {
1155 client->v6_nh_watch_rem_cnt++;
1156 if (p.prefixlen > IPV6_MAX_BITLEN) {
1157 zlog_debug(
1158 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1159 __PRETTY_FUNCTION__, p.prefixlen);
1160 return;
1161 }
1162 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1163 l += IPV6_MAX_BYTELEN;
1164 } else {
1165 flog_err(
1166 EC_ZEBRA_UNKNOWN_FAMILY,
1167 "rnh_register: Received unknown family type %d\n",
1168 p.family);
1169 return;
1170 }
1171 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
1172 if (rnh) {
1173 client->nh_dereg_time = monotime(NULL);
1174 zebra_remove_rnh_client(rnh, client, type);
1175 }
1176 }
1177 stream_failure:
1178 return;
1179 }
1180
1181 #define ZEBRA_MIN_FEC_LENGTH 5
1182
1183 /* FEC register */
1184 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1185 {
1186 struct stream *s;
1187 unsigned short l = 0;
1188 struct prefix p;
1189 uint16_t flags;
1190 uint32_t label = MPLS_INVALID_LABEL;
1191 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1192
1193 s = msg;
1194 zvrf = vrf_info_lookup(VRF_DEFAULT);
1195 if (!zvrf)
1196 return;
1197
1198 /*
1199 * The minimum amount of data that can be sent for one fec
1200 * registration
1201 */
1202 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1203 flog_err(
1204 EC_ZEBRA_IRDP_LEN_MISMATCH,
1205 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1206 hdr->length);
1207 return;
1208 }
1209
1210 while (l < hdr->length) {
1211 STREAM_GETW(s, flags);
1212 memset(&p, 0, sizeof(p));
1213 STREAM_GETW(s, p.family);
1214 if (p.family != AF_INET && p.family != AF_INET6) {
1215 flog_err(
1216 EC_ZEBRA_UNKNOWN_FAMILY,
1217 "fec_register: Received unknown family type %d\n",
1218 p.family);
1219 return;
1220 }
1221 STREAM_GETC(s, p.prefixlen);
1222 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1223 || (p.family == AF_INET6
1224 && p.prefixlen > IPV6_MAX_BITLEN)) {
1225 zlog_debug(
1226 "%s: Specified prefix hdr->length: %d is to long for %d",
1227 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1228 return;
1229 }
1230 l += 5;
1231 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1232 l += PSIZE(p.prefixlen);
1233 if (flags & ZEBRA_FEC_REGISTER_LABEL) {
1234 STREAM_GETL(s, label);
1235 l += 4;
1236 } else if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1237 STREAM_GETL(s, label_index);
1238 l += 4;
1239 }
1240
1241 zebra_mpls_fec_register(zvrf, &p, label, label_index, client);
1242 }
1243
1244 stream_failure:
1245 return;
1246 }
1247
1248 /* FEC unregister */
1249 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1250 {
1251 struct stream *s;
1252 unsigned short l = 0;
1253 struct prefix p;
1254 uint16_t flags;
1255
1256 s = msg;
1257 zvrf = vrf_info_lookup(VRF_DEFAULT);
1258 if (!zvrf)
1259 return;
1260
1261 /*
1262 * The minimum amount of data that can be sent for one
1263 * fec unregistration
1264 */
1265 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1266 flog_err(
1267 EC_ZEBRA_IRDP_LEN_MISMATCH,
1268 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1269 hdr->length);
1270 return;
1271 }
1272
1273 while (l < hdr->length) {
1274 STREAM_GETW(s, flags);
1275 if (flags != 0)
1276 goto stream_failure;
1277
1278 memset(&p, 0, sizeof(p));
1279 STREAM_GETW(s, p.family);
1280 if (p.family != AF_INET && p.family != AF_INET6) {
1281 flog_err(
1282 EC_ZEBRA_UNKNOWN_FAMILY,
1283 "fec_unregister: Received unknown family type %d\n",
1284 p.family);
1285 return;
1286 }
1287 STREAM_GETC(s, p.prefixlen);
1288 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1289 || (p.family == AF_INET6
1290 && p.prefixlen > IPV6_MAX_BITLEN)) {
1291 zlog_debug(
1292 "%s: Received prefix hdr->length %d which is greater than %d can support",
1293 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1294 return;
1295 }
1296 l += 5;
1297 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1298 l += PSIZE(p.prefixlen);
1299 zebra_mpls_fec_unregister(zvrf, &p, client);
1300 }
1301
1302 stream_failure:
1303 return;
1304 }
1305
1306
1307 /*
1308 * Register zebra server interface information.
1309 * Send current all interface and address information.
1310 */
1311 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1312 {
1313 struct vrf *vrf;
1314 struct interface *ifp;
1315
1316 /* Interface information is needed. */
1317 vrf_bitmap_set(client->ifinfo, zvrf_id(zvrf));
1318
1319 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1320 FOR_ALL_INTERFACES (vrf, ifp) {
1321 /* Skip pseudo interface. */
1322 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1323 continue;
1324
1325 zsend_interface_add(client, ifp);
1326 zsend_interface_addresses(client, ifp);
1327 }
1328 }
1329 }
1330
1331 /* Unregister zebra server interface information. */
1332 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1333 {
1334 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1335 }
1336
1337 void zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1338 const unsigned int nexthop_num)
1339 {
1340 if (nexthop_num > multipath_num) {
1341 char buff[PREFIX2STR_BUFFER];
1342
1343 prefix2str(p, buff, sizeof(buff));
1344 flog_warn(
1345 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1346 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1347 caller, buff, nexthop_num, multipath_num);
1348 }
1349 }
1350
1351 static void zread_route_add(ZAPI_HANDLER_ARGS)
1352 {
1353 struct stream *s;
1354 struct zapi_route api;
1355 struct zapi_nexthop *api_nh;
1356 afi_t afi;
1357 struct prefix_ipv6 *src_p = NULL;
1358 struct route_entry *re;
1359 struct nexthop *nexthop = NULL;
1360 int i, ret;
1361 vrf_id_t vrf_id = 0;
1362 struct ipaddr vtep_ip;
1363
1364 s = msg;
1365 if (zapi_route_decode(s, &api) < 0) {
1366 if (IS_ZEBRA_DEBUG_RECV)
1367 zlog_debug("%s: Unable to decode zapi_route sent",
1368 __PRETTY_FUNCTION__);
1369 return;
1370 }
1371
1372 if (IS_ZEBRA_DEBUG_RECV) {
1373 char buf_prefix[PREFIX_STRLEN];
1374
1375 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1376 zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
1377 __func__, buf_prefix,
1378 (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
1379 : "un"),
1380 api.flags);
1381 }
1382
1383 /* Allocate new route. */
1384 vrf_id = zvrf_id(zvrf);
1385 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
1386 re->type = api.type;
1387 re->instance = api.instance;
1388 re->flags = api.flags;
1389 re->uptime = time(NULL);
1390 re->vrf_id = vrf_id;
1391 if (api.tableid && vrf_id == VRF_DEFAULT)
1392 re->table = api.tableid;
1393 else
1394 re->table = zvrf->table_id;
1395
1396 /*
1397 * TBD should _all_ of the nexthop add operations use
1398 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1399 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1400 */
1401 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP))
1402 for (i = 0; i < api.nexthop_num; i++) {
1403 api_nh = &api.nexthops[i];
1404 ifindex_t ifindex = 0;
1405
1406 if (IS_ZEBRA_DEBUG_RECV)
1407 zlog_debug("nh type %d", api_nh->type);
1408
1409 switch (api_nh->type) {
1410 case NEXTHOP_TYPE_IFINDEX:
1411 nexthop = route_entry_nexthop_ifindex_add(
1412 re, api_nh->ifindex, api_nh->vrf_id);
1413 break;
1414 case NEXTHOP_TYPE_IPV4:
1415 if (IS_ZEBRA_DEBUG_RECV) {
1416 char nhbuf[INET6_ADDRSTRLEN] = {0};
1417
1418 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1419 nhbuf, INET6_ADDRSTRLEN);
1420 zlog_debug("%s: nh=%s, vrf_id=%d",
1421 __func__, nhbuf,
1422 api_nh->vrf_id);
1423 }
1424 nexthop = route_entry_nexthop_ipv4_add(
1425 re, &api_nh->gate.ipv4, NULL,
1426 api_nh->vrf_id);
1427 break;
1428 case NEXTHOP_TYPE_IPV4_IFINDEX:
1429
1430 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1431 if (CHECK_FLAG(api.flags,
1432 ZEBRA_FLAG_EVPN_ROUTE)) {
1433 ifindex = get_l3vni_svi_ifindex(vrf_id);
1434 } else {
1435 ifindex = api_nh->ifindex;
1436 }
1437
1438 if (IS_ZEBRA_DEBUG_RECV) {
1439 char nhbuf[INET6_ADDRSTRLEN] = {0};
1440
1441 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1442 nhbuf, INET6_ADDRSTRLEN);
1443 zlog_debug(
1444 "%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
1445 __func__, nhbuf, api_nh->vrf_id,
1446 re->vrf_id, ifindex);
1447 }
1448 nexthop = route_entry_nexthop_ipv4_ifindex_add(
1449 re, &api_nh->gate.ipv4, NULL, ifindex,
1450 api_nh->vrf_id);
1451
1452 /* if this an EVPN route entry,
1453 * program the nh as neigh
1454 */
1455 if (CHECK_FLAG(api.flags,
1456 ZEBRA_FLAG_EVPN_ROUTE)) {
1457 SET_FLAG(nexthop->flags,
1458 NEXTHOP_FLAG_EVPN_RVTEP);
1459 vtep_ip.ipa_type = IPADDR_V4;
1460 memcpy(&(vtep_ip.ipaddr_v4),
1461 &(api_nh->gate.ipv4),
1462 sizeof(struct in_addr));
1463 zebra_vxlan_evpn_vrf_route_add(
1464 vrf_id, &api_nh->rmac, &vtep_ip,
1465 &api.prefix);
1466 }
1467 break;
1468 case NEXTHOP_TYPE_IPV6:
1469 nexthop = route_entry_nexthop_ipv6_add(
1470 re, &api_nh->gate.ipv6, api_nh->vrf_id);
1471 break;
1472 case NEXTHOP_TYPE_IPV6_IFINDEX:
1473 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1474 if (CHECK_FLAG(api.flags,
1475 ZEBRA_FLAG_EVPN_ROUTE)) {
1476 ifindex = get_l3vni_svi_ifindex(vrf_id);
1477 } else {
1478 ifindex = api_nh->ifindex;
1479 }
1480
1481 nexthop = route_entry_nexthop_ipv6_ifindex_add(
1482 re, &api_nh->gate.ipv6, ifindex,
1483 api_nh->vrf_id);
1484
1485 /* if this an EVPN route entry,
1486 * program the nh as neigh
1487 */
1488 if (CHECK_FLAG(api.flags,
1489 ZEBRA_FLAG_EVPN_ROUTE)) {
1490 SET_FLAG(nexthop->flags,
1491 NEXTHOP_FLAG_EVPN_RVTEP);
1492 vtep_ip.ipa_type = IPADDR_V6;
1493 memcpy(&vtep_ip.ipaddr_v6,
1494 &(api_nh->gate.ipv6),
1495 sizeof(struct in6_addr));
1496 zebra_vxlan_evpn_vrf_route_add(
1497 vrf_id, &api_nh->rmac, &vtep_ip,
1498 &api.prefix);
1499 }
1500 break;
1501 case NEXTHOP_TYPE_BLACKHOLE:
1502 nexthop = route_entry_nexthop_blackhole_add(
1503 re, api_nh->bh_type);
1504 break;
1505 }
1506
1507 if (!nexthop) {
1508 flog_warn(
1509 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1510 "%s: Nexthops Specified: %d but we failed to properly create one",
1511 __PRETTY_FUNCTION__, api.nexthop_num);
1512 nexthops_free(re->ng.nexthop);
1513 XFREE(MTYPE_RE, re);
1514 return;
1515 }
1516 /* MPLS labels for BGP-LU or Segment Routing */
1517 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
1518 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1519 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1520 enum lsp_types_t label_type;
1521
1522 label_type =
1523 lsp_type_from_re_type(client->proto);
1524
1525 if (IS_ZEBRA_DEBUG_RECV) {
1526 zlog_debug(
1527 "%s: adding %d labels of type %d (1st=%u)",
1528 __func__, api_nh->label_num,
1529 label_type, api_nh->labels[0]);
1530 }
1531
1532 nexthop_add_labels(nexthop, label_type,
1533 api_nh->label_num,
1534 &api_nh->labels[0]);
1535 }
1536 }
1537
1538 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
1539 re->distance = api.distance;
1540 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
1541 re->metric = api.metric;
1542 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
1543 re->tag = api.tag;
1544 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
1545 re->mtu = api.mtu;
1546
1547 afi = family2afi(api.prefix.family);
1548 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1549 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1550 "%s: Received SRC Prefix but afi is not v6",
1551 __PRETTY_FUNCTION__);
1552 nexthops_free(re->ng.nexthop);
1553 XFREE(MTYPE_RE, re);
1554 return;
1555 }
1556 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1557 src_p = &api.src_prefix;
1558
1559 ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
1560
1561 /* Stats */
1562 switch (api.prefix.family) {
1563 case AF_INET:
1564 if (ret > 0)
1565 client->v4_route_add_cnt++;
1566 else if (ret < 0)
1567 client->v4_route_upd8_cnt++;
1568 break;
1569 case AF_INET6:
1570 if (ret > 0)
1571 client->v6_route_add_cnt++;
1572 else if (ret < 0)
1573 client->v6_route_upd8_cnt++;
1574 break;
1575 }
1576 }
1577
1578 static void zread_route_del(ZAPI_HANDLER_ARGS)
1579 {
1580 struct stream *s;
1581 struct zapi_route api;
1582 afi_t afi;
1583 struct prefix_ipv6 *src_p = NULL;
1584 uint32_t table_id;
1585
1586 s = msg;
1587 if (zapi_route_decode(s, &api) < 0)
1588 return;
1589
1590 afi = family2afi(api.prefix.family);
1591 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1592 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1593 "%s: Received a src prefix while afi is not v6",
1594 __PRETTY_FUNCTION__);
1595 return;
1596 }
1597 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1598 src_p = &api.src_prefix;
1599
1600 if (api.vrf_id == VRF_DEFAULT && api.tableid != 0)
1601 table_id = api.tableid;
1602 else
1603 table_id = zvrf->table_id;
1604
1605 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
1606 api.flags, &api.prefix, src_p, NULL, table_id, api.metric,
1607 api.distance, false);
1608
1609 /* Stats */
1610 switch (api.prefix.family) {
1611 case AF_INET:
1612 client->v4_route_del_cnt++;
1613 break;
1614 case AF_INET6:
1615 client->v6_route_del_cnt++;
1616 break;
1617 }
1618 }
1619
1620 /* MRIB Nexthop lookup for IPv4. */
1621 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
1622 {
1623 struct in_addr addr;
1624 struct route_entry *re;
1625
1626 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
1627 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
1628 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
1629
1630 stream_failure:
1631 return;
1632 }
1633
1634 /* Register zebra server router-id information. Send current router-id */
1635 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
1636 {
1637 struct prefix p;
1638
1639 /* Router-id information is needed. */
1640 vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
1641
1642 router_id_get(&p, zvrf_id(zvrf));
1643
1644 zsend_router_id_update(client, &p, zvrf_id(zvrf));
1645 }
1646
1647 /* Unregister zebra server router-id information. */
1648 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
1649 {
1650 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1651 }
1652
1653 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
1654 {
1655 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1656
1657 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
1658 stream_putc(s, mpls_enabled);
1659 stream_putl(s, multipath_num);
1660
1661 stream_putw_at(s, 0, stream_get_endp(s));
1662 zserv_send_message(client, s);
1663 }
1664
1665 /* Tie up route-type and client->sock */
1666 static void zread_hello(ZAPI_HANDLER_ARGS)
1667 {
1668 /* type of protocol (lib/zebra.h) */
1669 uint8_t proto;
1670 unsigned short instance;
1671 uint8_t notify;
1672
1673 STREAM_GETC(msg, proto);
1674 STREAM_GETW(msg, instance);
1675 STREAM_GETC(msg, notify);
1676 if (notify)
1677 client->notify_owner = true;
1678
1679 /* accept only dynamic routing protocols */
1680 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
1681 zlog_notice(
1682 "client %d says hello and bids fair to announce only %s routes vrf=%u",
1683 client->sock, zebra_route_string(proto),
1684 zvrf->vrf->vrf_id);
1685 if (instance)
1686 zlog_notice("client protocol instance %d", instance);
1687
1688 client->proto = proto;
1689 client->instance = instance;
1690 }
1691
1692 zsend_capabilities(client, zvrf);
1693 stream_failure:
1694 return;
1695 }
1696
1697 /* Unregister all information in a VRF. */
1698 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
1699 {
1700 int i;
1701 afi_t afi;
1702
1703 for (afi = AFI_IP; afi < AFI_MAX; afi++)
1704 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
1705 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
1706 vrf_bitmap_unset(client->redist_default, zvrf_id(zvrf));
1707 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1708 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1709 }
1710
1711 static void zread_mpls_labels(ZAPI_HANDLER_ARGS)
1712 {
1713 struct stream *s;
1714 enum lsp_types_t type;
1715 struct prefix prefix;
1716 enum nexthop_types_t gtype;
1717 union g_addr gate;
1718 ifindex_t ifindex;
1719 mpls_label_t in_label, out_label;
1720 uint8_t distance;
1721
1722 /* Get input stream. */
1723 s = msg;
1724
1725 /* Get data. */
1726 STREAM_GETC(s, type);
1727 STREAM_GETL(s, prefix.family);
1728 switch (prefix.family) {
1729 case AF_INET:
1730 STREAM_GET(&prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1731 STREAM_GETC(s, prefix.prefixlen);
1732 if (prefix.prefixlen > IPV4_MAX_BITLEN) {
1733 zlog_debug(
1734 "%s: Specified prefix length %d is greater than a v4 address can support",
1735 __PRETTY_FUNCTION__, prefix.prefixlen);
1736 return;
1737 }
1738 STREAM_GET(&gate.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
1739 break;
1740 case AF_INET6:
1741 STREAM_GET(&prefix.u.prefix6, s, 16);
1742 STREAM_GETC(s, prefix.prefixlen);
1743 if (prefix.prefixlen > IPV6_MAX_BITLEN) {
1744 zlog_debug(
1745 "%s: Specified prefix length %d is greater than a v6 address can support",
1746 __PRETTY_FUNCTION__, prefix.prefixlen);
1747 return;
1748 }
1749 STREAM_GET(&gate.ipv6, s, 16);
1750 break;
1751 default:
1752 zlog_debug("%s: Specified AF %d is not supported for this call",
1753 __PRETTY_FUNCTION__, prefix.family);
1754 return;
1755 }
1756 STREAM_GETL(s, ifindex);
1757 STREAM_GETC(s, distance);
1758 STREAM_GETL(s, in_label);
1759 STREAM_GETL(s, out_label);
1760
1761 switch (prefix.family) {
1762 case AF_INET:
1763 if (ifindex)
1764 gtype = NEXTHOP_TYPE_IPV4_IFINDEX;
1765 else
1766 gtype = NEXTHOP_TYPE_IPV4;
1767 break;
1768 case AF_INET6:
1769 if (ifindex)
1770 gtype = NEXTHOP_TYPE_IPV6_IFINDEX;
1771 else
1772 gtype = NEXTHOP_TYPE_IPV6;
1773 break;
1774 default:
1775 return;
1776 }
1777
1778 if (!mpls_enabled)
1779 return;
1780
1781 if (hdr->command == ZEBRA_MPLS_LABELS_ADD) {
1782 mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
1783 ifindex);
1784 mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
1785 distance, out_label);
1786 } else if (hdr->command == ZEBRA_MPLS_LABELS_DELETE) {
1787 mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
1788 mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
1789 distance, out_label);
1790 }
1791 stream_failure:
1792 return;
1793 }
1794
1795 /* Send response to a table manager connect request to client */
1796 static void zread_table_manager_connect(struct zserv *client,
1797 struct stream *msg, vrf_id_t vrf_id)
1798 {
1799 struct stream *s;
1800 uint8_t proto;
1801 uint16_t instance;
1802
1803 s = msg;
1804
1805 /* Get data. */
1806 STREAM_GETC(s, proto);
1807 STREAM_GETW(s, instance);
1808
1809 /* accept only dynamic routing protocols */
1810 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1811 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1812 "client %d has wrong protocol %s", client->sock,
1813 zebra_route_string(proto));
1814 zsend_table_manager_connect_response(client, vrf_id, 1);
1815 return;
1816 }
1817 zlog_notice("client %d with vrf %u instance %u connected as %s",
1818 client->sock, vrf_id, instance, zebra_route_string(proto));
1819 client->proto = proto;
1820 client->instance = instance;
1821
1822 /*
1823 * Release previous labels of same protocol and instance.
1824 * This is done in case it restarted from an unexpected shutdown.
1825 */
1826 release_daemon_table_chunks(client);
1827
1828 zsend_table_manager_connect_response(client, vrf_id, 0);
1829
1830 stream_failure:
1831 return;
1832 }
1833
1834 static void zread_label_manager_connect(struct zserv *client,
1835 struct stream *msg, vrf_id_t vrf_id)
1836 {
1837 struct stream *s;
1838 /* type of protocol (lib/zebra.h) */
1839 uint8_t proto;
1840 unsigned short instance;
1841
1842 /* Get input stream. */
1843 s = msg;
1844
1845 /* Get data. */
1846 STREAM_GETC(s, proto);
1847 STREAM_GETW(s, instance);
1848
1849 /* accept only dynamic routing protocols */
1850 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1851 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1852 "client %d has wrong protocol %s", client->sock,
1853 zebra_route_string(proto));
1854 if (client->is_synchronous)
1855 zsend_label_manager_connect_response(client, vrf_id, 1);
1856 return;
1857 }
1858 zlog_notice("client %d with vrf %u instance %u connected as %s",
1859 client->sock, vrf_id, instance, zebra_route_string(proto));
1860 client->proto = proto;
1861 client->instance = instance;
1862
1863 /*
1864 * Release previous labels of same protocol and instance.
1865 * This is done in case it restarted from an unexpected shutdown.
1866 */
1867 release_daemon_label_chunks(client);
1868
1869 zlog_debug(
1870 " Label Manager client connected: sock %d, proto %s, vrf %u instance %u",
1871 client->sock, zebra_route_string(proto), vrf_id, instance);
1872 /* send response back */
1873 if (client->is_synchronous)
1874 zsend_label_manager_connect_response(client, vrf_id, 0);
1875
1876 stream_failure:
1877 return;
1878 }
1879
1880 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
1881 vrf_id_t vrf_id)
1882 {
1883 struct stream *s;
1884 uint8_t keep;
1885 uint32_t size;
1886 struct label_manager_chunk *lmc;
1887 uint8_t proto;
1888 unsigned short instance;
1889
1890 /* Get input stream. */
1891 s = msg;
1892
1893 /* Get data. */
1894 STREAM_GETC(s, proto);
1895 STREAM_GETW(s, instance);
1896 STREAM_GETC(s, keep);
1897 STREAM_GETL(s, size);
1898
1899 lmc = assign_label_chunk(proto, instance, keep, size);
1900 if (!lmc)
1901 flog_err(
1902 EC_ZEBRA_LM_CANNOT_ASSIGN_CHUNK,
1903 "Unable to assign Label Chunk of size %u to %s instance %u",
1904 size, zebra_route_string(proto), instance);
1905 else
1906 zlog_debug("Assigned Label Chunk %u - %u to %s instance %u",
1907 lmc->start, lmc->end,
1908 zebra_route_string(proto), instance);
1909 /* send response back */
1910 zsend_assign_label_chunk_response(client, vrf_id, lmc);
1911
1912 stream_failure:
1913 return;
1914 }
1915
1916 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
1917 {
1918 struct stream *s;
1919 uint32_t start, end;
1920 uint8_t proto;
1921 unsigned short instance;
1922
1923 /* Get input stream. */
1924 s = msg;
1925
1926 /* Get data. */
1927 STREAM_GETC(s, proto);
1928 STREAM_GETW(s, instance);
1929 STREAM_GETL(s, start);
1930 STREAM_GETL(s, end);
1931
1932 release_label_chunk(proto, instance, start, end);
1933
1934 stream_failure:
1935 return;
1936 }
1937 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
1938 {
1939 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
1940 client->is_synchronous = hdr->command ==
1941 ZEBRA_LABEL_MANAGER_CONNECT;
1942
1943 /* external label manager */
1944 if (lm_is_external)
1945 zread_relay_label_manager_request(hdr->command, client, msg,
1946 zvrf_id(zvrf));
1947 /* this is a label manager */
1948 else {
1949 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT ||
1950 hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC)
1951 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
1952 else {
1953 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
1954 zread_get_label_chunk(client, msg,
1955 zvrf_id(zvrf));
1956 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
1957 zread_release_label_chunk(client, msg);
1958 }
1959 }
1960 }
1961
1962 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
1963 vrf_id_t vrf_id)
1964 {
1965 struct stream *s;
1966 uint32_t size;
1967 struct table_manager_chunk *tmc;
1968
1969 /* Get input stream. */
1970 s = msg;
1971
1972 /* Get data. */
1973 STREAM_GETL(s, size);
1974
1975 tmc = assign_table_chunk(client->proto, client->instance, size);
1976 if (!tmc)
1977 flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK,
1978 "%s: Unable to assign Table Chunk of size %u",
1979 __func__, size);
1980 else
1981 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
1982 tmc->end);
1983 /* send response back */
1984 zsend_assign_table_chunk_response(client, vrf_id, tmc);
1985
1986 stream_failure:
1987 return;
1988 }
1989
1990 static void zread_release_table_chunk(struct zserv *client, struct stream *msg)
1991 {
1992 struct stream *s;
1993 uint32_t start, end;
1994
1995 /* Get input stream. */
1996 s = msg;
1997
1998 /* Get data. */
1999 STREAM_GETL(s, start);
2000 STREAM_GETL(s, end);
2001
2002 release_table_chunk(client->proto, client->instance, start, end);
2003
2004 stream_failure:
2005 return;
2006 }
2007
2008 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2009 {
2010 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
2011 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2012 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2013 else {
2014 /* Sanity: don't allow 'unidentified' requests */
2015 if (!client->proto) {
2016 flog_err(
2017 EC_ZEBRA_TM_ALIENS,
2018 "Got table request from an unidentified client");
2019 return;
2020 }
2021 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2022 zread_get_table_chunk(client, msg, zvrf_id(zvrf));
2023 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2024 zread_release_table_chunk(client, msg);
2025 }
2026 }
2027
2028 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2029 {
2030 struct stream *s;
2031 char ifname[IF_NAMESIZE];
2032 ifindex_t ifindex;
2033 int type;
2034 int af;
2035 union g_addr nexthop;
2036 uint32_t local_label;
2037 uint32_t remote_label;
2038 uint8_t flags;
2039 union pw_protocol_fields data;
2040 uint8_t protocol;
2041 struct zebra_pw *pw;
2042
2043 /* Get input stream. */
2044 s = msg;
2045
2046 /* Get data. */
2047 STREAM_GET(ifname, s, IF_NAMESIZE);
2048 STREAM_GETL(s, ifindex);
2049 STREAM_GETL(s, type);
2050 STREAM_GETL(s, af);
2051 switch (af) {
2052 case AF_INET:
2053 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
2054 break;
2055 case AF_INET6:
2056 STREAM_GET(&nexthop.ipv6, s, 16);
2057 break;
2058 default:
2059 return;
2060 }
2061 STREAM_GETL(s, local_label);
2062 STREAM_GETL(s, remote_label);
2063 STREAM_GETC(s, flags);
2064 STREAM_GET(&data, s, sizeof(data));
2065 protocol = client->proto;
2066
2067 pw = zebra_pw_find(zvrf, ifname);
2068 switch (hdr->command) {
2069 case ZEBRA_PW_ADD:
2070 if (pw) {
2071 flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS,
2072 "%s: pseudowire %s already exists [%s]",
2073 __func__, ifname,
2074 zserv_command_string(hdr->command));
2075 return;
2076 }
2077
2078 zebra_pw_add(zvrf, ifname, protocol, client);
2079 break;
2080 case ZEBRA_PW_DELETE:
2081 if (!pw) {
2082 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2083 "%s: pseudowire %s not found [%s]", __func__,
2084 ifname, zserv_command_string(hdr->command));
2085 return;
2086 }
2087
2088 zebra_pw_del(zvrf, pw);
2089 break;
2090 case ZEBRA_PW_SET:
2091 case ZEBRA_PW_UNSET:
2092 if (!pw) {
2093 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2094 "%s: pseudowire %s not found [%s]", __func__,
2095 ifname, zserv_command_string(hdr->command));
2096 return;
2097 }
2098
2099 switch (hdr->command) {
2100 case ZEBRA_PW_SET:
2101 pw->enabled = 1;
2102 break;
2103 case ZEBRA_PW_UNSET:
2104 pw->enabled = 0;
2105 break;
2106 }
2107
2108 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
2109 remote_label, flags, &data);
2110 break;
2111 }
2112
2113 stream_failure:
2114 return;
2115 }
2116
2117 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
2118 {
2119 struct interface *master;
2120 struct interface *slave;
2121 struct stream *s = msg;
2122 int ifindex;
2123 vrf_id_t vrf_id;
2124
2125 STREAM_GETL(s, vrf_id);
2126 STREAM_GETL(s, ifindex);
2127 master = if_lookup_by_index(ifindex, vrf_id);
2128
2129 STREAM_GETL(s, vrf_id);
2130 STREAM_GETL(s, ifindex);
2131 slave = if_lookup_by_index(ifindex, vrf_id);
2132
2133 if (!master || !slave)
2134 return;
2135
2136 kernel_interface_set_master(master, slave);
2137
2138 stream_failure:
2139 return;
2140 }
2141
2142
2143 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
2144 {
2145 struct interface *ifp;
2146 mpls_label_t nlabel;
2147 afi_t afi;
2148 struct stream *s;
2149 struct zebra_vrf *def_zvrf;
2150 enum lsp_types_t ltype;
2151
2152 s = msg;
2153 STREAM_GETL(s, nlabel);
2154 STREAM_GETC(s, afi);
2155 if (nlabel == zvrf->label[afi]) {
2156 /*
2157 * Nothing to do here move along
2158 */
2159 return;
2160 }
2161
2162 STREAM_GETC(s, ltype);
2163
2164 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
2165 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
2166 else
2167 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
2168
2169 if (!ifp) {
2170 zlog_debug("Unable to find specified Interface for %s",
2171 zvrf->vrf->name);
2172 return;
2173 }
2174
2175 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
2176
2177 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
2178 afi_t scrubber;
2179 bool really_remove;
2180
2181 really_remove = true;
2182 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
2183 if (scrubber == afi)
2184 continue;
2185
2186 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
2187 continue;
2188
2189 if (zvrf->label[afi] == zvrf->label[scrubber]) {
2190 really_remove = false;
2191 break;
2192 }
2193 }
2194
2195 if (really_remove)
2196 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
2197 NEXTHOP_TYPE_IFINDEX, NULL,
2198 ifp->ifindex);
2199 }
2200
2201 if (nlabel != MPLS_LABEL_NONE)
2202 mpls_lsp_install(def_zvrf, ltype, nlabel,
2203 MPLS_LABEL_IMPLICIT_NULL, NEXTHOP_TYPE_IFINDEX,
2204 NULL, ifp->ifindex);
2205
2206 zvrf->label[afi] = nlabel;
2207 stream_failure:
2208 return;
2209 }
2210
2211 static inline void zread_rule(ZAPI_HANDLER_ARGS)
2212 {
2213 struct zebra_pbr_rule zpr;
2214 struct stream *s;
2215 uint32_t total, i;
2216 ifindex_t ifindex;
2217
2218 s = msg;
2219 STREAM_GETL(s, total);
2220
2221 for (i = 0; i < total; i++) {
2222 memset(&zpr, 0, sizeof(zpr));
2223
2224 zpr.sock = client->sock;
2225 zpr.rule.vrf_id = hdr->vrf_id;
2226 STREAM_GETL(s, zpr.rule.seq);
2227 STREAM_GETL(s, zpr.rule.priority);
2228 STREAM_GETL(s, zpr.rule.unique);
2229 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
2230 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
2231 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
2232 prefix_blen(&zpr.rule.filter.src_ip));
2233 STREAM_GETW(s, zpr.rule.filter.src_port);
2234 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
2235 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
2236 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
2237 prefix_blen(&zpr.rule.filter.dst_ip));
2238 STREAM_GETW(s, zpr.rule.filter.dst_port);
2239 STREAM_GETL(s, zpr.rule.filter.fwmark);
2240 STREAM_GETL(s, zpr.rule.action.table);
2241 STREAM_GETL(s, ifindex);
2242
2243 if (ifindex) {
2244 zpr.ifp = if_lookup_by_index_per_ns(
2245 zvrf->zns,
2246 ifindex);
2247 if (!zpr.ifp) {
2248 zlog_debug("Failed to lookup ifindex: %u",
2249 ifindex);
2250 return;
2251 }
2252 }
2253
2254 if (!is_default_prefix(&zpr.rule.filter.src_ip))
2255 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
2256
2257 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
2258 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
2259
2260 if (zpr.rule.filter.src_port)
2261 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
2262
2263 if (zpr.rule.filter.dst_port)
2264 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
2265
2266 if (zpr.rule.filter.fwmark)
2267 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
2268
2269 zpr.vrf_id = zvrf->vrf->vrf_id;
2270 if (hdr->command == ZEBRA_RULE_ADD)
2271 zebra_pbr_add_rule(&zpr);
2272 else
2273 zebra_pbr_del_rule(&zpr);
2274 }
2275
2276 stream_failure:
2277 return;
2278 }
2279
2280 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
2281 {
2282 struct zebra_pbr_ipset zpi;
2283 struct stream *s;
2284 uint32_t total, i;
2285
2286 s = msg;
2287 STREAM_GETL(s, total);
2288
2289 for (i = 0; i < total; i++) {
2290 memset(&zpi, 0, sizeof(zpi));
2291
2292 zpi.sock = client->sock;
2293 zpi.vrf_id = zvrf->vrf->vrf_id;
2294 STREAM_GETL(s, zpi.unique);
2295 STREAM_GETL(s, zpi.type);
2296 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2297
2298 if (hdr->command == ZEBRA_IPSET_CREATE)
2299 zebra_pbr_create_ipset(&zpi);
2300 else
2301 zebra_pbr_destroy_ipset(&zpi);
2302 }
2303
2304 stream_failure:
2305 return;
2306 }
2307
2308 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
2309 {
2310 struct zebra_pbr_ipset_entry zpi;
2311 struct zebra_pbr_ipset ipset;
2312 struct stream *s;
2313 uint32_t total, i;
2314
2315 s = msg;
2316 STREAM_GETL(s, total);
2317
2318 for (i = 0; i < total; i++) {
2319 memset(&zpi, 0, sizeof(zpi));
2320 memset(&ipset, 0, sizeof(ipset));
2321
2322 zpi.sock = client->sock;
2323 STREAM_GETL(s, zpi.unique);
2324 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2325 STREAM_GETC(s, zpi.src.family);
2326 STREAM_GETC(s, zpi.src.prefixlen);
2327 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
2328 STREAM_GETC(s, zpi.dst.family);
2329 STREAM_GETC(s, zpi.dst.prefixlen);
2330 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
2331
2332 STREAM_GETW(s, zpi.src_port_min);
2333 STREAM_GETW(s, zpi.src_port_max);
2334 STREAM_GETW(s, zpi.dst_port_min);
2335 STREAM_GETW(s, zpi.dst_port_max);
2336 STREAM_GETC(s, zpi.proto);
2337 if (!is_default_prefix(&zpi.src))
2338 zpi.filter_bm |= PBR_FILTER_SRC_IP;
2339
2340 if (!is_default_prefix(&zpi.dst))
2341 zpi.filter_bm |= PBR_FILTER_DST_IP;
2342 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2343 zpi.filter_bm |= PBR_FILTER_DST_PORT;
2344 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2345 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
2346 if (zpi.dst_port_max != 0)
2347 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
2348 if (zpi.src_port_max != 0)
2349 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
2350 if (zpi.proto != 0)
2351 zpi.filter_bm |= PBR_FILTER_PROTO;
2352
2353 /* calculate backpointer */
2354 zpi.backpointer =
2355 zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
2356 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
2357 zebra_pbr_add_ipset_entry(&zpi);
2358 else
2359 zebra_pbr_del_ipset_entry(&zpi);
2360 }
2361
2362 stream_failure:
2363 return;
2364 }
2365
2366 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
2367 {
2368 struct zebra_pbr_iptable zpi;
2369 struct stream *s;
2370
2371 s = msg;
2372
2373 memset(&zpi, 0, sizeof(zpi));
2374
2375 zpi.interface_name_list = list_new();
2376 zpi.sock = client->sock;
2377 zpi.vrf_id = zvrf->vrf->vrf_id;
2378 STREAM_GETL(s, zpi.unique);
2379 STREAM_GETL(s, zpi.type);
2380 STREAM_GETL(s, zpi.filter_bm);
2381 STREAM_GETL(s, zpi.action);
2382 STREAM_GETL(s, zpi.fwmark);
2383 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2384 STREAM_GETW(s, zpi.pkt_len_min);
2385 STREAM_GETW(s, zpi.pkt_len_max);
2386 STREAM_GETW(s, zpi.tcp_flags);
2387 STREAM_GETW(s, zpi.tcp_mask_flags);
2388 STREAM_GETC(s, zpi.dscp_value);
2389 STREAM_GETC(s, zpi.fragment);
2390 STREAM_GETL(s, zpi.nb_interface);
2391 zebra_pbr_iptable_update_interfacelist(s, &zpi);
2392
2393 if (hdr->command == ZEBRA_IPTABLE_ADD)
2394 zebra_pbr_add_iptable(&zpi);
2395 else
2396 zebra_pbr_del_iptable(&zpi);
2397 stream_failure:
2398 return;
2399 }
2400
2401 void (*zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
2402 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
2403 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
2404 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
2405 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
2406 [ZEBRA_ROUTE_ADD] = zread_route_add,
2407 [ZEBRA_ROUTE_DELETE] = zread_route_del,
2408 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
2409 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
2410 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
2411 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
2412 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
2413 [ZEBRA_HELLO] = zread_hello,
2414 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
2415 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
2416 [ZEBRA_IMPORT_ROUTE_REGISTER] = zread_rnh_register,
2417 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = zread_rnh_unregister,
2418 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
2419 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
2420 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
2421 #if HAVE_BFDD > 0
2422 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
2423 #endif /* HAVE_BFDD */
2424 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
2425 [ZEBRA_VRF_LABEL] = zread_vrf_label,
2426 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
2427 #if defined(HAVE_RTADV)
2428 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
2429 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
2430 #else
2431 [ZEBRA_INTERFACE_ENABLE_RADV] = NULL,
2432 [ZEBRA_INTERFACE_DISABLE_RADV] = NULL,
2433 #endif
2434 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels,
2435 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels,
2436 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
2437 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
2438 [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request,
2439 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
2440 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
2441 [ZEBRA_FEC_REGISTER] = zread_fec_register,
2442 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
2443 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
2444 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
2445 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
2446 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add,
2447 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del,
2448 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
2449 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
2450 [ZEBRA_DUPLICATE_ADDR_DETECTION] = zebra_vxlan_dup_addr_detection,
2451 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
2452 [ZEBRA_PW_ADD] = zread_pseudowire,
2453 [ZEBRA_PW_DELETE] = zread_pseudowire,
2454 [ZEBRA_PW_SET] = zread_pseudowire,
2455 [ZEBRA_PW_UNSET] = zread_pseudowire,
2456 [ZEBRA_RULE_ADD] = zread_rule,
2457 [ZEBRA_RULE_DELETE] = zread_rule,
2458 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
2459 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
2460 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
2461 [ZEBRA_IPSET_CREATE] = zread_ipset,
2462 [ZEBRA_IPSET_DESTROY] = zread_ipset,
2463 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
2464 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
2465 [ZEBRA_IPTABLE_ADD] = zread_iptable,
2466 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
2467 [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control,
2468 };
2469
2470 #if defined(HANDLE_ZAPI_FUZZING)
2471 extern struct zebra_privs_t zserv_privs;
2472
2473 static void zserv_write_incoming(struct stream *orig, uint16_t command)
2474 {
2475 char fname[MAXPATHLEN];
2476 struct stream *copy;
2477 int fd = -1;
2478
2479 copy = stream_dup(orig);
2480 stream_set_getp(copy, 0);
2481
2482 snprintf(fname, MAXPATHLEN, "%s/%u", DAEMON_VTY_DIR, command);
2483
2484 frr_elevate_privs(&zserv_privs) {
2485 fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
2486 }
2487 stream_flush(copy, fd);
2488 close(fd);
2489 stream_free(copy);
2490 }
2491 #endif
2492
2493 void zserv_handle_commands(struct zserv *client, struct stream *msg)
2494 {
2495 struct zmsghdr hdr;
2496 struct zebra_vrf *zvrf;
2497
2498 zapi_parse_header(msg, &hdr);
2499
2500 #if defined(HANDLE_ZAPI_FUZZING)
2501 zserv_write_incoming(msg, hdr.command);
2502 #endif
2503
2504 hdr.length -= ZEBRA_HEADER_SIZE;
2505
2506 /* lookup vrf */
2507 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
2508 if (!zvrf) {
2509 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
2510 zlog_debug("ZAPI message specifies unknown VRF: %d",
2511 hdr.vrf_id);
2512 return;
2513 }
2514
2515 if (hdr.command >= array_size(zserv_handlers)
2516 || zserv_handlers[hdr.command] == NULL)
2517 zlog_info("Zebra received unknown command %d", hdr.command);
2518 else
2519 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
2520 }
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