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Merge pull request #10918 from opensourcerouting/fix/bgpd_crash
[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/stream.h"
28 #include "lib/memory.h"
29 #include "lib/table.h"
30 #include "lib/network.h"
31 #include "lib/log.h"
32 #include "lib/zclient.h"
33 #include "lib/privs.h"
34 #include "lib/nexthop.h"
35 #include "lib/vrf.h"
36 #include "lib/libfrr.h"
37 #include "lib/lib_errors.h"
38
39 #include "zebra/zebra_router.h"
40 #include "zebra/rib.h"
41 #include "zebra/zebra_ns.h"
42 #include "zebra/zebra_vrf.h"
43 #include "zebra/router-id.h"
44 #include "zebra/redistribute.h"
45 #include "zebra/debug.h"
46 #include "zebra/zebra_rnh.h"
47 #include "zebra/interface.h"
48 #include "zebra/zebra_ptm.h"
49 #include "zebra/rtadv.h"
50 #include "zebra/zebra_mpls.h"
51 #include "zebra/zebra_mroute.h"
52 #include "zebra/zebra_vxlan.h"
53 #include "zebra/zebra_evpn_mh.h"
54 #include "zebra/rt.h"
55 #include "zebra/zebra_pbr.h"
56 #include "zebra/table_manager.h"
57 #include "zebra/zapi_msg.h"
58 #include "zebra/zebra_errors.h"
59 #include "zebra/zebra_mlag.h"
60 #include "zebra/connected.h"
61 #include "zebra/zebra_opaque.h"
62 #include "zebra/zebra_srte.h"
63 #include "zebra/zebra_srv6.h"
64
65 DEFINE_MTYPE_STATIC(ZEBRA, RE_OPAQUE, "Route Opaque Data");
66
67 static int zapi_nhg_decode(struct stream *s, int cmd, struct zapi_nhg *api_nhg);
68
69 /* Encoding helpers -------------------------------------------------------- */
70
71 static void zserv_encode_interface(struct stream *s, struct interface *ifp)
72 {
73 /* Interface information. */
74 struct zebra_if *zif = ifp->info;
75
76 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
77 stream_putl(s, ifp->ifindex);
78 stream_putc(s, ifp->status);
79 stream_putq(s, ifp->flags);
80 stream_putc(s, ifp->ptm_enable);
81 stream_putc(s, ifp->ptm_status);
82 stream_putl(s, ifp->metric);
83 stream_putl(s, ifp->speed);
84 stream_putl(s, ifp->mtu);
85 stream_putl(s, ifp->mtu6);
86 stream_putl(s, ifp->bandwidth);
87 stream_putl(s, zif->link_ifindex);
88 stream_putl(s, ifp->ll_type);
89 stream_putl(s, ifp->hw_addr_len);
90 if (ifp->hw_addr_len)
91 stream_put(s, ifp->hw_addr, ifp->hw_addr_len);
92
93 /* Then, Traffic Engineering parameters if any */
94 if (HAS_LINK_PARAMS(ifp) && IS_LINK_PARAMS_SET(ifp->link_params)) {
95 stream_putc(s, 1);
96 zebra_interface_link_params_write(s, ifp);
97 } else
98 stream_putc(s, 0);
99
100 /* Write packet size. */
101 stream_putw_at(s, 0, stream_get_endp(s));
102 }
103
104 static void zserv_encode_vrf(struct stream *s, struct zebra_vrf *zvrf)
105 {
106 struct vrf_data data;
107 const char *netns_name = zvrf_ns_name(zvrf);
108
109 memset(&data, 0, sizeof(data));
110 data.l.table_id = zvrf->table_id;
111
112 if (netns_name)
113 strlcpy(data.l.netns_name, basename((char *)netns_name),
114 NS_NAMSIZ);
115 else
116 memset(data.l.netns_name, 0, NS_NAMSIZ);
117 /* Pass the tableid and the netns NAME */
118 stream_put(s, &data, sizeof(struct vrf_data));
119 /* Interface information. */
120 stream_put(s, zvrf_name(zvrf), VRF_NAMSIZ);
121 /* Write packet size. */
122 stream_putw_at(s, 0, stream_get_endp(s));
123 }
124
125 static int zserv_encode_nexthop(struct stream *s, struct nexthop *nexthop)
126 {
127 stream_putl(s, nexthop->vrf_id);
128 stream_putc(s, nexthop->type);
129 switch (nexthop->type) {
130 case NEXTHOP_TYPE_IPV4:
131 case NEXTHOP_TYPE_IPV4_IFINDEX:
132 stream_put_in_addr(s, &nexthop->gate.ipv4);
133 stream_putl(s, nexthop->ifindex);
134 break;
135 case NEXTHOP_TYPE_IPV6:
136 stream_put(s, &nexthop->gate.ipv6, 16);
137 break;
138 case NEXTHOP_TYPE_IPV6_IFINDEX:
139 stream_put(s, &nexthop->gate.ipv6, 16);
140 stream_putl(s, nexthop->ifindex);
141 break;
142 case NEXTHOP_TYPE_IFINDEX:
143 stream_putl(s, nexthop->ifindex);
144 break;
145 default:
146 /* do nothing */
147 break;
148 }
149 return 1;
150 }
151
152 /*
153 * Zebra error addition adds error type.
154 *
155 *
156 * 0 1
157 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
158 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
159 * | enum zebra_error_types |
160 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
161 *
162 */
163 static void zserv_encode_error(struct stream *s, enum zebra_error_types error)
164 {
165 stream_put(s, &error, sizeof(error));
166
167 /* Write packet size. */
168 stream_putw_at(s, 0, stream_get_endp(s));
169 }
170
171 /* Send handlers ----------------------------------------------------------- */
172
173 /* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
174 /*
175 * This function is called in the following situations:
176 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
177 * from the client.
178 * - at startup, when zebra figures out the available interfaces
179 * - when an interface is added (where support for
180 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
181 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
182 * received)
183 */
184 int zsend_interface_add(struct zserv *client, struct interface *ifp)
185 {
186 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
187
188 zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf->vrf_id);
189 zserv_encode_interface(s, ifp);
190
191 client->ifadd_cnt++;
192 return zserv_send_message(client, s);
193 }
194
195 /* Interface deletion from zebra daemon. */
196 int zsend_interface_delete(struct zserv *client, struct interface *ifp)
197 {
198 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
199
200 zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf->vrf_id);
201 zserv_encode_interface(s, ifp);
202
203 client->ifdel_cnt++;
204 return zserv_send_message(client, s);
205 }
206
207 int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf)
208 {
209 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
210
211 zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf));
212 zserv_encode_vrf(s, zvrf);
213
214 client->vrfadd_cnt++;
215 return zserv_send_message(client, s);
216 }
217
218 /* VRF deletion from zebra daemon. */
219 int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf)
220
221 {
222 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
223
224 zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf));
225 zserv_encode_vrf(s, zvrf);
226
227 client->vrfdel_cnt++;
228 return zserv_send_message(client, s);
229 }
230
231 int zsend_interface_link_params(struct zserv *client, struct interface *ifp)
232 {
233 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
234
235 if (!ifp->link_params) {
236 stream_free(s);
237 return 0;
238 }
239
240 zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->vrf->vrf_id);
241
242 /* Add Interface Index */
243 stream_putl(s, ifp->ifindex);
244
245 /* Then TE Link Parameters */
246 if (zebra_interface_link_params_write(s, ifp) == 0) {
247 stream_free(s);
248 return 0;
249 }
250
251 /* Write packet size. */
252 stream_putw_at(s, 0, stream_get_endp(s));
253
254 return zserv_send_message(client, s);
255 }
256
257 /* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or
258 * ZEBRA_INTERFACE_ADDRESS_DELETE to the client.
259 *
260 * A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations:
261 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
262 * from the client, after the ZEBRA_INTERFACE_ADD has been
263 * sent from zebra to the client
264 * - redistribute new address info to all clients in the following situations
265 * - at startup, when zebra figures out the available interfaces
266 * - when an interface is added (where support for
267 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
268 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
269 * received)
270 * - for the vty commands "ip address A.B.C.D/M [<label LINE>]"
271 * and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M"
272 * - when an RTM_NEWADDR message is received from the kernel,
273 *
274 * The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE:
275 *
276 * zsend_interface_address(DELETE)
277 * ^
278 * |
279 * zebra_interface_address_delete_update
280 * ^ ^ ^
281 * | | if_delete_update
282 * | |
283 * ip_address_uninstall connected_delete_ipv4
284 * [ipv6_addresss_uninstall] [connected_delete_ipv6]
285 * ^ ^
286 * | |
287 * | RTM_NEWADDR on routing/netlink socket
288 * |
289 * vty commands:
290 * "no ip address A.B.C.D/M [label LINE]"
291 * "no ip address A.B.C.D/M"
292 * ["no ipv6 address X:X::X:X/M"]
293 *
294 */
295 int zsend_interface_address(int cmd, struct zserv *client,
296 struct interface *ifp, struct connected *ifc)
297 {
298 int blen;
299 struct prefix *p;
300 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
301
302 zclient_create_header(s, cmd, ifp->vrf->vrf_id);
303 stream_putl(s, ifp->ifindex);
304
305 /* Interface address flag. */
306 stream_putc(s, ifc->flags);
307
308 /* Prefix information. */
309 p = ifc->address;
310 stream_putc(s, p->family);
311 blen = prefix_blen(p);
312 stream_put(s, &p->u.prefix, blen);
313
314 /*
315 * XXX gnu version does not send prefixlen for
316 * ZEBRA_INTERFACE_ADDRESS_DELETE
317 * but zebra_interface_address_delete_read() in the gnu version
318 * expects to find it
319 */
320 stream_putc(s, p->prefixlen);
321
322 /* Destination. */
323 p = ifc->destination;
324 if (p)
325 stream_put(s, &p->u.prefix, blen);
326 else
327 stream_put(s, NULL, blen);
328
329 /* Write packet size. */
330 stream_putw_at(s, 0, stream_get_endp(s));
331
332 client->connected_rt_add_cnt++;
333 return zserv_send_message(client, s);
334 }
335
336 static int zsend_interface_nbr_address(int cmd, struct zserv *client,
337 struct interface *ifp,
338 struct nbr_connected *ifc)
339 {
340 int blen;
341 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
342 struct prefix *p;
343
344 zclient_create_header(s, cmd, ifp->vrf->vrf_id);
345 stream_putl(s, ifp->ifindex);
346
347 /* Prefix information. */
348 p = ifc->address;
349 stream_putc(s, p->family);
350 blen = prefix_blen(p);
351 stream_put(s, &p->u.prefix, blen);
352
353 /*
354 * XXX gnu version does not send prefixlen for
355 * ZEBRA_INTERFACE_ADDRESS_DELETE
356 * but zebra_interface_address_delete_read() in the gnu version
357 * expects to find it
358 */
359 stream_putc(s, p->prefixlen);
360
361 /* Write packet size. */
362 stream_putw_at(s, 0, stream_get_endp(s));
363
364 return zserv_send_message(client, s);
365 }
366
367 /* Interface address addition. */
368 static void zebra_interface_nbr_address_add_update(struct interface *ifp,
369 struct nbr_connected *ifc)
370 {
371 struct listnode *node, *nnode;
372 struct zserv *client;
373 struct prefix *p;
374
375 if (IS_ZEBRA_DEBUG_EVENT) {
376 char buf[INET6_ADDRSTRLEN];
377
378 p = ifc->address;
379 zlog_debug(
380 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_ADD %s/%d on %s",
381 inet_ntop(p->family, &p->u.prefix, buf,
382 INET6_ADDRSTRLEN),
383 p->prefixlen, ifc->ifp->name);
384 }
385
386 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
387 /* Do not send unsolicited messages to synchronous clients. */
388 if (client->synchronous)
389 continue;
390
391 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
392 client, ifp, ifc);
393 }
394 }
395
396 /* Interface address deletion. */
397 static void zebra_interface_nbr_address_delete_update(struct interface *ifp,
398 struct nbr_connected *ifc)
399 {
400 struct listnode *node, *nnode;
401 struct zserv *client;
402 struct prefix *p;
403
404 if (IS_ZEBRA_DEBUG_EVENT) {
405 char buf[INET6_ADDRSTRLEN];
406
407 p = ifc->address;
408 zlog_debug(
409 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_DELETE %s/%d on %s",
410 inet_ntop(p->family, &p->u.prefix, buf,
411 INET6_ADDRSTRLEN),
412 p->prefixlen, ifc->ifp->name);
413 }
414
415 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
416 /* Do not send unsolicited messages to synchronous clients. */
417 if (client->synchronous)
418 continue;
419
420 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE,
421 client, ifp, ifc);
422 }
423 }
424
425 /* Send addresses on interface to client */
426 int zsend_interface_addresses(struct zserv *client, struct interface *ifp)
427 {
428 struct listnode *cnode, *cnnode;
429 struct connected *c;
430 struct nbr_connected *nc;
431
432 /* Send interface addresses. */
433 for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode, c)) {
434 if (!CHECK_FLAG(c->conf, ZEBRA_IFC_REAL))
435 continue;
436
437 if (zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD, client,
438 ifp, c)
439 < 0)
440 return -1;
441 }
442
443 /* Send interface neighbors. */
444 for (ALL_LIST_ELEMENTS(ifp->nbr_connected, cnode, cnnode, nc)) {
445 if (zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
446 client, ifp, nc)
447 < 0)
448 return -1;
449 }
450
451 return 0;
452 }
453
454 /* Notify client about interface moving from one VRF to another.
455 * Whether client is interested in old and new VRF is checked by caller.
456 */
457 int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
458 vrf_id_t vrf_id)
459 {
460 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
461
462 zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf->vrf_id);
463
464 /* Fill in the name of the interface and its new VRF (id) */
465 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
466 stream_putl(s, vrf_id);
467
468 /* Write packet size. */
469 stream_putw_at(s, 0, stream_get_endp(s));
470
471 client->if_vrfchg_cnt++;
472 return zserv_send_message(client, s);
473 }
474
475 /* Add new nbr connected IPv6 address */
476 void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address)
477 {
478 struct nbr_connected *ifc;
479 struct prefix p;
480
481 p.family = AF_INET6;
482 IPV6_ADDR_COPY(&p.u.prefix6, address);
483 p.prefixlen = IPV6_MAX_BITLEN;
484
485 ifc = listnode_head(ifp->nbr_connected);
486 if (!ifc) {
487 /* new addition */
488 ifc = nbr_connected_new();
489 ifc->address = prefix_new();
490 ifc->ifp = ifp;
491 listnode_add(ifp->nbr_connected, ifc);
492 }
493
494 prefix_copy(ifc->address, &p);
495
496 zebra_interface_nbr_address_add_update(ifp, ifc);
497
498 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 1);
499 }
500
501 void nbr_connected_delete_ipv6(struct interface *ifp, struct in6_addr *address)
502 {
503 struct nbr_connected *ifc;
504 struct prefix p;
505
506 p.family = AF_INET6;
507 IPV6_ADDR_COPY(&p.u.prefix6, address);
508 p.prefixlen = IPV6_MAX_BITLEN;
509
510 ifc = nbr_connected_check(ifp, &p);
511 if (!ifc)
512 return;
513
514 listnode_delete(ifp->nbr_connected, ifc);
515
516 zebra_interface_nbr_address_delete_update(ifp, ifc);
517
518 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 0);
519
520 nbr_connected_free(ifc);
521 }
522
523 /*
524 * The cmd passed to zsend_interface_update may be ZEBRA_INTERFACE_UP or
525 * ZEBRA_INTERFACE_DOWN.
526 *
527 * The ZEBRA_INTERFACE_UP message is sent from the zebra server to
528 * the clients in one of 2 situations:
529 * - an if_up is detected e.g., as a result of an RTM_IFINFO message
530 * - a vty command modifying the bandwidth of an interface is received.
531 * The ZEBRA_INTERFACE_DOWN message is sent when an if_down is detected.
532 */
533 int zsend_interface_update(int cmd, struct zserv *client, struct interface *ifp)
534 {
535 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
536
537 zclient_create_header(s, cmd, ifp->vrf->vrf_id);
538 zserv_encode_interface(s, ifp);
539
540 if (cmd == ZEBRA_INTERFACE_UP)
541 client->ifup_cnt++;
542 else
543 client->ifdown_cnt++;
544
545 return zserv_send_message(client, s);
546 }
547
548 int zsend_redistribute_route(int cmd, struct zserv *client,
549 const struct route_node *rn,
550 const struct route_entry *re)
551 {
552 struct zapi_route api;
553 struct zapi_nexthop *api_nh;
554 struct nexthop *nexthop;
555 const struct prefix *p, *src_p;
556 uint8_t count = 0;
557 afi_t afi;
558 size_t stream_size =
559 MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route));
560
561 srcdest_rnode_prefixes(rn, &p, &src_p);
562 memset(&api, 0, sizeof(api));
563 api.vrf_id = re->vrf_id;
564 api.type = re->type;
565 api.safi = SAFI_UNICAST;
566 api.instance = re->instance;
567 api.flags = re->flags;
568
569 afi = family2afi(p->family);
570 switch (afi) {
571 case AFI_IP:
572 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
573 client->redist_v4_add_cnt++;
574 else
575 client->redist_v4_del_cnt++;
576 break;
577 case AFI_IP6:
578 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
579 client->redist_v6_add_cnt++;
580 else
581 client->redist_v6_del_cnt++;
582 break;
583 default:
584 break;
585 }
586
587 /* Prefix. */
588 api.prefix = *p;
589 if (src_p) {
590 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
591 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
592 }
593
594 for (nexthop = re->nhe->nhg.nexthop;
595 nexthop; nexthop = nexthop->next) {
596 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
597 continue;
598
599 api_nh = &api.nexthops[count];
600 api_nh->vrf_id = nexthop->vrf_id;
601 api_nh->type = nexthop->type;
602 api_nh->weight = nexthop->weight;
603 switch (nexthop->type) {
604 case NEXTHOP_TYPE_BLACKHOLE:
605 api_nh->bh_type = nexthop->bh_type;
606 break;
607 case NEXTHOP_TYPE_IPV4:
608 case NEXTHOP_TYPE_IPV4_IFINDEX:
609 api_nh->gate.ipv4 = nexthop->gate.ipv4;
610 api_nh->ifindex = nexthop->ifindex;
611 break;
612 case NEXTHOP_TYPE_IFINDEX:
613 api_nh->ifindex = nexthop->ifindex;
614 break;
615 case NEXTHOP_TYPE_IPV6:
616 case NEXTHOP_TYPE_IPV6_IFINDEX:
617 api_nh->gate.ipv6 = nexthop->gate.ipv6;
618 api_nh->ifindex = nexthop->ifindex;
619 }
620 count++;
621 }
622
623 /* Nexthops. */
624 if (count) {
625 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
626 api.nexthop_num = count;
627 }
628
629 /* Attributes. */
630 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
631 api.distance = re->distance;
632 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
633 api.metric = re->metric;
634 if (re->tag) {
635 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
636 api.tag = re->tag;
637 }
638 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
639 api.mtu = re->mtu;
640
641 struct stream *s = stream_new(stream_size);
642
643 /* Encode route and send. */
644 if (zapi_route_encode(cmd, s, &api) < 0) {
645 stream_free(s);
646 return -1;
647 }
648
649 if (IS_ZEBRA_DEBUG_SEND)
650 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %pFX",
651 __func__, zserv_command_string(cmd),
652 zebra_route_string(client->proto),
653 zebra_route_string(api.type), api.vrf_id,
654 &api.prefix);
655 return zserv_send_message(client, s);
656 }
657
658 /*
659 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
660 * nexthop is not found on mrib. Returns both route metric and protocol
661 * distance.
662 */
663 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
664 struct in_addr addr,
665 struct route_entry *re,
666 struct zebra_vrf *zvrf)
667 {
668 struct stream *s;
669 unsigned long nump;
670 uint8_t num;
671 struct nexthop *nexthop;
672
673 /* Get output stream. */
674 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
675 stream_reset(s);
676
677 /* Fill in result. */
678 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
679 stream_put_in_addr(s, &addr);
680
681 if (re) {
682 struct nexthop_group *nhg;
683
684 stream_putc(s, re->distance);
685 stream_putl(s, re->metric);
686 num = 0;
687 /* remember position for nexthop_num */
688 nump = stream_get_endp(s);
689 /* reserve room for nexthop_num */
690 stream_putc(s, 0);
691 nhg = rib_get_fib_nhg(re);
692 for (ALL_NEXTHOPS_PTR(nhg, nexthop)) {
693 if (rnh_nexthop_valid(re, nexthop))
694 num += zserv_encode_nexthop(s, nexthop);
695 }
696
697 /* store nexthop_num */
698 stream_putc_at(s, nump, num);
699 } else {
700 stream_putc(s, 0); /* distance */
701 stream_putl(s, 0); /* metric */
702 stream_putc(s, 0); /* nexthop_num */
703 }
704
705 stream_putw_at(s, 0, stream_get_endp(s));
706
707 return zserv_send_message(client, s);
708 }
709
710 int zsend_nhg_notify(uint16_t type, uint16_t instance, uint32_t session_id,
711 uint32_t id, enum zapi_nhg_notify_owner note)
712 {
713 struct zserv *client;
714 struct stream *s;
715
716 client = zserv_find_client_session(type, instance, session_id);
717 if (!client) {
718 if (IS_ZEBRA_DEBUG_PACKET) {
719 zlog_debug("Not Notifying Owner: %u(%u) about %u(%d)",
720 type, instance, id, note);
721 }
722 return 0;
723 }
724
725 if (IS_ZEBRA_DEBUG_SEND)
726 zlog_debug("%s: type %d, id %d, note %s",
727 __func__, type, id, zapi_nhg_notify_owner2str(note));
728
729 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
730 stream_reset(s);
731
732 zclient_create_header(s, ZEBRA_NHG_NOTIFY_OWNER, VRF_DEFAULT);
733
734 stream_put(s, &note, sizeof(note));
735 stream_putl(s, id);
736
737 stream_putw_at(s, 0, stream_get_endp(s));
738
739 return zserv_send_message(client, s);
740 }
741
742 /*
743 * Common utility send route notification, called from a path using a
744 * route_entry and from a path using a dataplane context.
745 */
746 static int route_notify_internal(const struct route_node *rn, int type,
747 uint16_t instance, vrf_id_t vrf_id,
748 uint32_t table_id,
749 enum zapi_route_notify_owner note, afi_t afi,
750 safi_t safi)
751 {
752 struct zserv *client;
753 struct stream *s;
754 uint8_t blen;
755
756 client = zserv_find_client(type, instance);
757 if (!client || !client->notify_owner) {
758 if (IS_ZEBRA_DEBUG_PACKET)
759 zlog_debug(
760 "Not Notifying Owner: %s about prefix %pRN(%u) %d vrf: %u",
761 zebra_route_string(type), rn, table_id, note,
762 vrf_id);
763 return 0;
764 }
765
766 if (IS_ZEBRA_DEBUG_PACKET)
767 zlog_debug(
768 "Notifying Owner: %s about prefix %pRN(%u) %d vrf: %u",
769 zebra_route_string(type), rn, table_id, note, vrf_id);
770
771 /* We're just allocating a small-ish buffer here, since we only
772 * encode a small amount of data.
773 */
774 s = stream_new(ZEBRA_SMALL_PACKET_SIZE);
775
776 stream_reset(s);
777
778 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
779
780 stream_put(s, &note, sizeof(note));
781
782 stream_putc(s, rn->p.family);
783
784 blen = prefix_blen(&rn->p);
785 stream_putc(s, rn->p.prefixlen);
786 stream_put(s, &rn->p.u.prefix, blen);
787
788 stream_putl(s, table_id);
789
790 /* Encode AFI, SAFI in the message */
791 stream_putc(s, afi);
792 stream_putc(s, safi);
793
794 stream_putw_at(s, 0, stream_get_endp(s));
795
796 return zserv_send_message(client, s);
797 }
798
799 int zsend_route_notify_owner(const struct route_node *rn,
800 struct route_entry *re,
801 enum zapi_route_notify_owner note, afi_t afi,
802 safi_t safi)
803 {
804 return (route_notify_internal(rn, re->type, re->instance, re->vrf_id,
805 re->table, note, afi, safi));
806 }
807
808 /*
809 * Route-owner notification using info from dataplane update context.
810 */
811 int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx,
812 enum zapi_route_notify_owner note)
813 {
814 return (route_notify_internal(
815 rib_find_rn_from_ctx(ctx), dplane_ctx_get_type(ctx),
816 dplane_ctx_get_instance(ctx), dplane_ctx_get_vrf(ctx),
817 dplane_ctx_get_table(ctx), note, dplane_ctx_get_afi(ctx),
818 dplane_ctx_get_safi(ctx)));
819 }
820
821 static void zread_route_notify_request(ZAPI_HANDLER_ARGS)
822 {
823 uint8_t notify;
824
825 STREAM_GETC(msg, notify);
826 client->notify_owner = notify;
827 stream_failure:
828 return;
829 }
830
831 void zsend_rule_notify_owner(const struct zebra_dplane_ctx *ctx,
832 enum zapi_rule_notify_owner note)
833 {
834 struct listnode *node;
835 struct zserv *client;
836 struct stream *s;
837
838 if (IS_ZEBRA_DEBUG_PACKET)
839 zlog_debug("%s: Notifying %u", __func__,
840 dplane_ctx_rule_get_unique(ctx));
841
842 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
843 if (dplane_ctx_rule_get_sock(ctx) == client->sock)
844 break;
845 }
846
847 if (!client)
848 return;
849
850 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
851
852 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
853 stream_put(s, &note, sizeof(note));
854 stream_putl(s, dplane_ctx_rule_get_seq(ctx));
855 stream_putl(s, dplane_ctx_rule_get_priority(ctx));
856 stream_putl(s, dplane_ctx_rule_get_unique(ctx));
857 stream_put(s, dplane_ctx_rule_get_ifname(ctx), INTERFACE_NAMSIZ);
858
859 stream_putw_at(s, 0, stream_get_endp(s));
860
861 zserv_send_message(client, s);
862 }
863
864 void zsend_iptable_notify_owner(const struct zebra_dplane_ctx *ctx,
865 enum zapi_iptable_notify_owner note)
866 {
867 struct listnode *node;
868 struct zserv *client;
869 struct stream *s;
870 struct zebra_pbr_iptable ipt;
871 uint16_t cmd = ZEBRA_IPTABLE_NOTIFY_OWNER;
872
873 dplane_ctx_get_pbr_iptable(ctx, &ipt);
874
875 if (IS_ZEBRA_DEBUG_PACKET)
876 zlog_debug("%s: Notifying %s id %u note %u", __func__,
877 zserv_command_string(cmd), ipt.unique, note);
878
879 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
880 if (ipt.sock == client->sock)
881 break;
882 }
883
884 if (!client)
885 return;
886
887 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
888
889 zclient_create_header(s, cmd, VRF_DEFAULT);
890 stream_putw(s, note);
891 stream_putl(s, ipt.unique);
892 stream_put(s, ipt.ipset_name, ZEBRA_IPSET_NAME_SIZE);
893 stream_putw_at(s, 0, stream_get_endp(s));
894
895 zserv_send_message(client, s);
896 }
897
898 void zsend_ipset_notify_owner(const struct zebra_dplane_ctx *ctx,
899 enum zapi_ipset_notify_owner note)
900 {
901 struct listnode *node;
902 struct zserv *client;
903 struct stream *s;
904 struct zebra_pbr_ipset ipset;
905 uint16_t cmd = ZEBRA_IPSET_NOTIFY_OWNER;
906
907 dplane_ctx_get_pbr_ipset(ctx, &ipset);
908
909 if (IS_ZEBRA_DEBUG_PACKET)
910 zlog_debug("%s: Notifying %s id %u note %u", __func__,
911 zserv_command_string(cmd), ipset.unique, note);
912
913 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
914 if (ipset.sock == client->sock)
915 break;
916 }
917
918 if (!client)
919 return;
920
921 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
922
923 zclient_create_header(s, cmd, VRF_DEFAULT);
924 stream_putw(s, note);
925 stream_putl(s, ipset.unique);
926 stream_put(s, ipset.ipset_name, ZEBRA_IPSET_NAME_SIZE);
927 stream_putw_at(s, 0, stream_get_endp(s));
928
929 zserv_send_message(client, s);
930 }
931
932 void zsend_ipset_entry_notify_owner(const struct zebra_dplane_ctx *ctx,
933 enum zapi_ipset_entry_notify_owner note)
934 {
935 struct listnode *node;
936 struct zserv *client;
937 struct stream *s;
938 struct zebra_pbr_ipset_entry ipent;
939 struct zebra_pbr_ipset ipset;
940 uint16_t cmd = ZEBRA_IPSET_ENTRY_NOTIFY_OWNER;
941
942 dplane_ctx_get_pbr_ipset_entry(ctx, &ipent);
943 dplane_ctx_get_pbr_ipset(ctx, &ipset);
944
945 if (IS_ZEBRA_DEBUG_PACKET)
946 zlog_debug("%s: Notifying %s id %u note %u", __func__,
947 zserv_command_string(cmd), ipent.unique, note);
948
949 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
950 if (ipent.sock == client->sock)
951 break;
952 }
953
954 if (!client)
955 return;
956
957 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
958
959 zclient_create_header(s, cmd, VRF_DEFAULT);
960 stream_putw(s, note);
961 stream_putl(s, ipent.unique);
962 stream_put(s, ipset.ipset_name, ZEBRA_IPSET_NAME_SIZE);
963 stream_putw_at(s, 0, stream_get_endp(s));
964
965 zserv_send_message(client, s);
966 }
967
968 void zsend_nhrp_neighbor_notify(int cmd, struct interface *ifp,
969 struct ipaddr *ipaddr, int ndm_state,
970 union sockunion *link_layer_ipv4)
971 {
972 struct stream *s;
973 struct listnode *node, *nnode;
974 struct zserv *client;
975 afi_t afi;
976 union sockunion ip;
977
978 if (IS_ZEBRA_DEBUG_PACKET)
979 zlog_debug("%s: Notifying Neighbor entry (%u)", __func__, cmd);
980
981 sockunion_family(&ip) = ipaddr_family(ipaddr);
982 afi = family2afi(sockunion_family(&ip));
983 memcpy((char *)sockunion_get_addr(&ip), &ipaddr->ip.addr,
984 family2addrsize(sockunion_family(&ip)));
985
986 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
987 if (!vrf_bitmap_check(client->nhrp_neighinfo[afi],
988 ifp->vrf->vrf_id))
989 continue;
990
991 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
992 zclient_neigh_ip_encode(s, cmd, &ip, link_layer_ipv4, ifp,
993 ndm_state);
994 stream_putw_at(s, 0, stream_get_endp(s));
995 zserv_send_message(client, s);
996 }
997 }
998
999
1000 /* Router-id is updated. Send ZEBRA_ROUTER_ID_UPDATE to client. */
1001 int zsend_router_id_update(struct zserv *client, afi_t afi, struct prefix *p,
1002 vrf_id_t vrf_id)
1003 {
1004 int blen;
1005 struct stream *s;
1006
1007 /* Check this client need interface information. */
1008 if (!vrf_bitmap_check(client->ridinfo[afi], vrf_id))
1009 return 0;
1010
1011 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1012
1013 /* Message type. */
1014 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
1015
1016 /* Prefix information. */
1017 stream_putc(s, p->family);
1018 blen = prefix_blen(p);
1019 stream_put(s, &p->u.prefix, blen);
1020 stream_putc(s, p->prefixlen);
1021
1022 /* Write packet size. */
1023 stream_putw_at(s, 0, stream_get_endp(s));
1024
1025 return zserv_send_message(client, s);
1026 }
1027
1028 /*
1029 * Function used by Zebra to send a PW status update to LDP daemon
1030 */
1031 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
1032 {
1033 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1034
1035 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
1036 stream_write(s, pw->ifname, IF_NAMESIZE);
1037 stream_putl(s, pw->ifindex);
1038 stream_putl(s, pw->status);
1039
1040 /* Put length at the first point of the stream. */
1041 stream_putw_at(s, 0, stream_get_endp(s));
1042
1043 return zserv_send_message(client, s);
1044 }
1045
1046 /* Send response to a get label chunk request to client */
1047 int zsend_assign_label_chunk_response(struct zserv *client, vrf_id_t vrf_id,
1048 struct label_manager_chunk *lmc)
1049 {
1050 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1051
1052 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
1053 /* proto */
1054 stream_putc(s, client->proto);
1055 /* instance */
1056 stream_putw(s, client->instance);
1057
1058 if (lmc) {
1059 /* keep */
1060 stream_putc(s, lmc->keep);
1061 /* start and end labels */
1062 stream_putl(s, lmc->start);
1063 stream_putl(s, lmc->end);
1064 }
1065
1066 /* Write packet size. */
1067 stream_putw_at(s, 0, stream_get_endp(s));
1068
1069 return zserv_send_message(client, s);
1070 }
1071
1072 /* Send response to a label manager connect request to client */
1073 int zsend_label_manager_connect_response(struct zserv *client, vrf_id_t vrf_id,
1074 unsigned short result)
1075 {
1076 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1077
1078 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
1079
1080 /* proto */
1081 stream_putc(s, client->proto);
1082
1083 /* instance */
1084 stream_putw(s, client->instance);
1085
1086 /* result */
1087 stream_putc(s, result);
1088
1089 /* Write packet size. */
1090 stream_putw_at(s, 0, stream_get_endp(s));
1091
1092 return zserv_send_message(client, s);
1093 }
1094
1095 /* Send response to a get table chunk request to client */
1096 static int zsend_assign_table_chunk_response(struct zserv *client,
1097 vrf_id_t vrf_id,
1098 struct table_manager_chunk *tmc)
1099 {
1100 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1101
1102 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
1103
1104 if (tmc) {
1105 /* start and end labels */
1106 stream_putl(s, tmc->start);
1107 stream_putl(s, tmc->end);
1108 }
1109
1110 /* Write packet size. */
1111 stream_putw_at(s, 0, stream_get_endp(s));
1112
1113 return zserv_send_message(client, s);
1114 }
1115
1116 static int zsend_table_manager_connect_response(struct zserv *client,
1117 vrf_id_t vrf_id,
1118 uint16_t result)
1119 {
1120 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1121
1122 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
1123
1124 /* result */
1125 stream_putc(s, result);
1126
1127 stream_putw_at(s, 0, stream_get_endp(s));
1128
1129 return zserv_send_message(client, s);
1130 }
1131
1132 /* SRv6 locator add notification from zebra daemon. */
1133 int zsend_zebra_srv6_locator_add(struct zserv *client, struct srv6_locator *loc)
1134 {
1135 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1136
1137 zclient_create_header(s, ZEBRA_SRV6_LOCATOR_ADD, VRF_DEFAULT);
1138 zapi_srv6_locator_encode(s, loc);
1139 stream_putw_at(s, 0, stream_get_endp(s));
1140
1141 return zserv_send_message(client, s);
1142 }
1143
1144 /* SRv6 locator delete notification from zebra daemon. */
1145 int zsend_zebra_srv6_locator_delete(struct zserv *client,
1146 struct srv6_locator *loc)
1147 {
1148 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1149
1150 zclient_create_header(s, ZEBRA_SRV6_LOCATOR_DELETE, VRF_DEFAULT);
1151 zapi_srv6_locator_encode(s, loc);
1152 stream_putw_at(s, 0, stream_get_endp(s));
1153
1154 return zserv_send_message(client, s);
1155 }
1156
1157 /* Inbound message handling ------------------------------------------------ */
1158
1159 /* Nexthop register */
1160 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1161 {
1162 struct rnh *rnh;
1163 struct stream *s;
1164 struct prefix p;
1165 unsigned short l = 0;
1166 uint8_t connected = 0;
1167 uint8_t resolve_via_default;
1168 bool exist;
1169 bool flag_changed = false;
1170 uint8_t orig_flags;
1171 safi_t safi;
1172
1173 if (IS_ZEBRA_DEBUG_NHT)
1174 zlog_debug(
1175 "rnh_register msg from client %s: hdr->length=%d vrf=%u",
1176 zebra_route_string(client->proto), hdr->length,
1177 zvrf->vrf->vrf_id);
1178
1179 s = msg;
1180
1181 if (!client->nh_reg_time)
1182 client->nh_reg_time = monotime(NULL);
1183
1184 while (l < hdr->length) {
1185 STREAM_GETC(s, connected);
1186 STREAM_GETC(s, resolve_via_default);
1187 STREAM_GETW(s, safi);
1188 STREAM_GETW(s, p.family);
1189 STREAM_GETC(s, p.prefixlen);
1190 l += 7;
1191 if (p.family == AF_INET) {
1192 client->v4_nh_watch_add_cnt++;
1193 if (p.prefixlen > IPV4_MAX_BITLEN) {
1194 zlog_debug(
1195 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1196 __func__, p.prefixlen);
1197 return;
1198 }
1199 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1200 l += IPV4_MAX_BYTELEN;
1201 } else if (p.family == AF_INET6) {
1202 client->v6_nh_watch_add_cnt++;
1203 if (p.prefixlen > IPV6_MAX_BITLEN) {
1204 zlog_debug(
1205 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1206 __func__, p.prefixlen);
1207 return;
1208 }
1209 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1210 l += IPV6_MAX_BYTELEN;
1211 } else {
1212 flog_err(
1213 EC_ZEBRA_UNKNOWN_FAMILY,
1214 "rnh_register: Received unknown family type %d",
1215 p.family);
1216 return;
1217 }
1218 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), safi, &exist);
1219 if (!rnh)
1220 return;
1221
1222 orig_flags = rnh->flags;
1223 if (connected && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1224 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1225 else if (!connected
1226 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1227 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1228
1229 if (resolve_via_default)
1230 SET_FLAG(rnh->flags, ZEBRA_NHT_RESOLVE_VIA_DEFAULT);
1231
1232 if (orig_flags != rnh->flags)
1233 flag_changed = true;
1234
1235 /* Anything not AF_INET/INET6 has been filtered out above */
1236 if (!exist || flag_changed)
1237 zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, &p,
1238 safi);
1239
1240 zebra_add_rnh_client(rnh, client, zvrf_id(zvrf));
1241 }
1242
1243 stream_failure:
1244 return;
1245 }
1246
1247 /* Nexthop register */
1248 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1249 {
1250 struct rnh *rnh;
1251 struct stream *s;
1252 struct prefix p;
1253 unsigned short l = 0;
1254 safi_t safi;
1255
1256 if (IS_ZEBRA_DEBUG_NHT)
1257 zlog_debug(
1258 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u",
1259 zebra_route_string(client->proto), hdr->length,
1260 zvrf->vrf->vrf_id);
1261
1262 s = msg;
1263
1264 while (l < hdr->length) {
1265 uint8_t ignore;
1266
1267 STREAM_GETC(s, ignore);
1268 if (ignore != 0)
1269 goto stream_failure;
1270 STREAM_GETC(s, ignore);
1271 if (ignore != 0)
1272 goto stream_failure;
1273
1274 STREAM_GETW(s, safi);
1275 STREAM_GETW(s, p.family);
1276 STREAM_GETC(s, p.prefixlen);
1277 l += 7;
1278 if (p.family == AF_INET) {
1279 client->v4_nh_watch_rem_cnt++;
1280 if (p.prefixlen > IPV4_MAX_BITLEN) {
1281 zlog_debug(
1282 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1283 __func__, p.prefixlen);
1284 return;
1285 }
1286 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1287 l += IPV4_MAX_BYTELEN;
1288 } else if (p.family == AF_INET6) {
1289 client->v6_nh_watch_rem_cnt++;
1290 if (p.prefixlen > IPV6_MAX_BITLEN) {
1291 zlog_debug(
1292 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1293 __func__, p.prefixlen);
1294 return;
1295 }
1296 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1297 l += IPV6_MAX_BYTELEN;
1298 } else {
1299 flog_err(
1300 EC_ZEBRA_UNKNOWN_FAMILY,
1301 "rnh_register: Received unknown family type %d",
1302 p.family);
1303 return;
1304 }
1305 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), safi);
1306 if (rnh) {
1307 client->nh_dereg_time = monotime(NULL);
1308 zebra_remove_rnh_client(rnh, client);
1309 }
1310 }
1311 stream_failure:
1312 return;
1313 }
1314
1315 #define ZEBRA_MIN_FEC_LENGTH 5
1316
1317 /* FEC register */
1318 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1319 {
1320 struct stream *s;
1321 unsigned short l = 0;
1322 struct prefix p;
1323 uint16_t flags;
1324 uint32_t label = MPLS_INVALID_LABEL;
1325 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1326
1327 s = msg;
1328 zvrf = vrf_info_lookup(VRF_DEFAULT);
1329 if (!zvrf)
1330 return;
1331
1332 /*
1333 * The minimum amount of data that can be sent for one fec
1334 * registration
1335 */
1336 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1337 flog_err(
1338 EC_ZEBRA_IRDP_LEN_MISMATCH,
1339 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1340 hdr->length);
1341 return;
1342 }
1343
1344 while (l < hdr->length) {
1345 STREAM_GETW(s, flags);
1346 memset(&p, 0, sizeof(p));
1347 STREAM_GETW(s, p.family);
1348 if (p.family != AF_INET && p.family != AF_INET6) {
1349 flog_err(
1350 EC_ZEBRA_UNKNOWN_FAMILY,
1351 "fec_register: Received unknown family type %d",
1352 p.family);
1353 return;
1354 }
1355 STREAM_GETC(s, p.prefixlen);
1356 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1357 || (p.family == AF_INET6
1358 && p.prefixlen > IPV6_MAX_BITLEN)) {
1359 zlog_debug(
1360 "%s: Specified prefix hdr->length: %d is to long for %d",
1361 __func__, p.prefixlen, p.family);
1362 return;
1363 }
1364 l += 5;
1365 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1366 l += PSIZE(p.prefixlen);
1367 if (flags & ZEBRA_FEC_REGISTER_LABEL) {
1368 STREAM_GETL(s, label);
1369 l += 4;
1370 } else if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1371 STREAM_GETL(s, label_index);
1372 l += 4;
1373 }
1374
1375 zebra_mpls_fec_register(zvrf, &p, label, label_index, client);
1376 }
1377
1378 stream_failure:
1379 return;
1380 }
1381
1382 /* FEC unregister */
1383 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1384 {
1385 struct stream *s;
1386 unsigned short l = 0;
1387 struct prefix p;
1388 uint16_t flags;
1389
1390 s = msg;
1391 zvrf = vrf_info_lookup(VRF_DEFAULT);
1392 if (!zvrf)
1393 return;
1394
1395 /*
1396 * The minimum amount of data that can be sent for one
1397 * fec unregistration
1398 */
1399 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1400 flog_err(
1401 EC_ZEBRA_IRDP_LEN_MISMATCH,
1402 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1403 hdr->length);
1404 return;
1405 }
1406
1407 while (l < hdr->length) {
1408 STREAM_GETW(s, flags);
1409 if (flags != 0)
1410 goto stream_failure;
1411
1412 memset(&p, 0, sizeof(p));
1413 STREAM_GETW(s, p.family);
1414 if (p.family != AF_INET && p.family != AF_INET6) {
1415 flog_err(
1416 EC_ZEBRA_UNKNOWN_FAMILY,
1417 "fec_unregister: Received unknown family type %d",
1418 p.family);
1419 return;
1420 }
1421 STREAM_GETC(s, p.prefixlen);
1422 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1423 || (p.family == AF_INET6
1424 && p.prefixlen > IPV6_MAX_BITLEN)) {
1425 zlog_debug(
1426 "%s: Received prefix hdr->length %d which is greater than %d can support",
1427 __func__, p.prefixlen, p.family);
1428 return;
1429 }
1430 l += 5;
1431 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1432 l += PSIZE(p.prefixlen);
1433 zebra_mpls_fec_unregister(zvrf, &p, client);
1434 }
1435
1436 stream_failure:
1437 return;
1438 }
1439
1440
1441 /*
1442 * Register zebra server interface information.
1443 * Send current all interface and address information.
1444 */
1445 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1446 {
1447 struct vrf *vrf;
1448 struct interface *ifp;
1449
1450 vrf_id_t vrf_id = zvrf_id(zvrf);
1451 if (vrf_id != VRF_DEFAULT && vrf_id != VRF_UNKNOWN) {
1452 FOR_ALL_INTERFACES (zvrf->vrf, ifp) {
1453 /* Skip pseudo interface. */
1454 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1455 continue;
1456
1457 zsend_interface_add(client, ifp);
1458 zsend_interface_link_params(client, ifp);
1459 zsend_interface_addresses(client, ifp);
1460 }
1461 return;
1462 }
1463
1464 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1465 FOR_ALL_INTERFACES (vrf, ifp) {
1466 /* Skip pseudo interface. */
1467 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1468 continue;
1469
1470 zsend_interface_add(client, ifp);
1471 zsend_interface_link_params(client, ifp);
1472 zsend_interface_addresses(client, ifp);
1473 }
1474 }
1475 }
1476
1477 /* Unregister zebra server interface information. */
1478 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1479 {
1480 }
1481
1482 /*
1483 * Handle message requesting interface be set up or down.
1484 */
1485 static void zread_interface_set_protodown(ZAPI_HANDLER_ARGS)
1486 {
1487 ifindex_t ifindex;
1488 struct interface *ifp;
1489 char down;
1490 enum protodown_reasons reason;
1491
1492 STREAM_GETL(msg, ifindex);
1493 STREAM_GETC(msg, down);
1494
1495 /* set ifdown */
1496 ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), ifindex);
1497
1498 if (!ifp) {
1499 zlog_warn(
1500 "Cannot set protodown %s for interface %u; does not exist",
1501 down ? "on" : "off", ifindex);
1502
1503 return;
1504 }
1505
1506 switch (client->proto) {
1507 case ZEBRA_ROUTE_VRRP:
1508 reason = ZEBRA_PROTODOWN_VRRP;
1509 break;
1510 case ZEBRA_ROUTE_SHARP:
1511 reason = ZEBRA_PROTODOWN_SHARP;
1512 break;
1513 default:
1514 reason = 0;
1515 break;
1516 }
1517
1518 zebra_if_set_protodown(ifp, down, reason);
1519
1520 stream_failure:
1521 return;
1522 }
1523
1524 bool zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1525 const unsigned int nexthop_num)
1526 {
1527 if (nexthop_num > zrouter.multipath_num) {
1528 char buff[PREFIX2STR_BUFFER];
1529
1530 if (p)
1531 prefix2str(p, buff, sizeof(buff));
1532
1533 flog_warn(
1534 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1535 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1536 caller, (p ? buff : "(NULL)"), nexthop_num,
1537 zrouter.multipath_num);
1538 return true;
1539 }
1540
1541 return false;
1542 }
1543
1544 /*
1545 * Create a new nexthop based on a zapi nexthop.
1546 */
1547 static struct nexthop *nexthop_from_zapi(const struct zapi_nexthop *api_nh,
1548 uint32_t flags, struct prefix *p,
1549 uint16_t backup_nexthop_num)
1550 {
1551 struct nexthop *nexthop = NULL;
1552 struct ipaddr vtep_ip;
1553 struct interface *ifp;
1554 int i;
1555 char nhbuf[INET6_ADDRSTRLEN] = "";
1556
1557 switch (api_nh->type) {
1558 case NEXTHOP_TYPE_IFINDEX:
1559 nexthop = nexthop_from_ifindex(api_nh->ifindex, api_nh->vrf_id);
1560 break;
1561 case NEXTHOP_TYPE_IPV4:
1562 if (IS_ZEBRA_DEBUG_RECV) {
1563 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1564 sizeof(nhbuf));
1565 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1566 nhbuf, api_nh->vrf_id);
1567 }
1568 nexthop = nexthop_from_ipv4(&api_nh->gate.ipv4, NULL,
1569 api_nh->vrf_id);
1570 break;
1571 case NEXTHOP_TYPE_IPV4_IFINDEX:
1572 if (IS_ZEBRA_DEBUG_RECV) {
1573 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1574 sizeof(nhbuf));
1575 zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d",
1576 __func__, nhbuf, api_nh->vrf_id,
1577 api_nh->ifindex);
1578 }
1579
1580 nexthop = nexthop_from_ipv4_ifindex(
1581 &api_nh->gate.ipv4, NULL, api_nh->ifindex,
1582 api_nh->vrf_id);
1583
1584 /* Special handling for IPv4 routes sourced from EVPN:
1585 * the nexthop and associated MAC need to be installed.
1586 */
1587 if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1588 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1589 vtep_ip.ipa_type = IPADDR_V4;
1590 memcpy(&(vtep_ip.ipaddr_v4), &(api_nh->gate.ipv4),
1591 sizeof(struct in_addr));
1592 zebra_rib_queue_evpn_route_add(
1593 api_nh->vrf_id, &api_nh->rmac, &vtep_ip, p);
1594 }
1595 break;
1596 case NEXTHOP_TYPE_IPV6:
1597 if (IS_ZEBRA_DEBUG_RECV) {
1598 inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf,
1599 sizeof(nhbuf));
1600 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1601 nhbuf, api_nh->vrf_id);
1602 }
1603 nexthop = nexthop_from_ipv6(&api_nh->gate.ipv6, api_nh->vrf_id);
1604 break;
1605 case NEXTHOP_TYPE_IPV6_IFINDEX:
1606 if (IS_ZEBRA_DEBUG_RECV) {
1607 inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf,
1608 sizeof(nhbuf));
1609 zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d",
1610 __func__, nhbuf, api_nh->vrf_id,
1611 api_nh->ifindex);
1612 }
1613 nexthop = nexthop_from_ipv6_ifindex(&api_nh->gate.ipv6,
1614 api_nh->ifindex,
1615 api_nh->vrf_id);
1616
1617 /* Special handling for IPv6 routes sourced from EVPN:
1618 * the nexthop and associated MAC need to be installed.
1619 */
1620 if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1621 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1622 vtep_ip.ipa_type = IPADDR_V6;
1623 memcpy(&vtep_ip.ipaddr_v6, &(api_nh->gate.ipv6),
1624 sizeof(struct in6_addr));
1625 zebra_rib_queue_evpn_route_add(
1626 api_nh->vrf_id, &api_nh->rmac, &vtep_ip, p);
1627 }
1628 break;
1629 case NEXTHOP_TYPE_BLACKHOLE:
1630 if (IS_ZEBRA_DEBUG_RECV)
1631 zlog_debug("%s: nh blackhole %d",
1632 __func__, api_nh->bh_type);
1633
1634 nexthop =
1635 nexthop_from_blackhole(api_nh->bh_type, api_nh->vrf_id);
1636 break;
1637 }
1638
1639 /* Return early if we couldn't process the zapi nexthop */
1640 if (nexthop == NULL) {
1641 goto done;
1642 }
1643
1644 /* Mark nexthop as onlink either if client has explicitly told us
1645 * to or if the nexthop is on an 'unnumbered' interface.
1646 */
1647 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK))
1648 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1649 else if (api_nh->type == NEXTHOP_TYPE_IPV4_IFINDEX) {
1650 ifp = if_lookup_by_index(api_nh->ifindex, api_nh->vrf_id);
1651 if (ifp && connected_is_unnumbered(ifp))
1652 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1653 }
1654
1655 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_WEIGHT))
1656 nexthop->weight = api_nh->weight;
1657
1658 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP)) {
1659 /* Validate count */
1660 if (api_nh->backup_num > NEXTHOP_MAX_BACKUPS) {
1661 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
1662 zlog_debug("%s: invalid backup nh count %d",
1663 __func__, api_nh->backup_num);
1664 nexthop_free(nexthop);
1665 nexthop = NULL;
1666 goto done;
1667 }
1668
1669 /* Copy backup info */
1670 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP);
1671 nexthop->backup_num = api_nh->backup_num;
1672
1673 for (i = 0; i < api_nh->backup_num; i++) {
1674 /* Validate backup index */
1675 if (api_nh->backup_idx[i] < backup_nexthop_num) {
1676 nexthop->backup_idx[i] = api_nh->backup_idx[i];
1677 } else {
1678 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
1679 zlog_debug("%s: invalid backup nh idx %d",
1680 __func__,
1681 api_nh->backup_idx[i]);
1682 nexthop_free(nexthop);
1683 nexthop = NULL;
1684 goto done;
1685 }
1686 }
1687 }
1688
1689 done:
1690 return nexthop;
1691 }
1692
1693 static bool zapi_read_nexthops(struct zserv *client, struct prefix *p,
1694 struct zapi_nexthop *nhops, uint32_t flags,
1695 uint32_t message, uint16_t nexthop_num,
1696 uint16_t backup_nh_num,
1697 struct nexthop_group **png,
1698 struct nhg_backup_info **pbnhg)
1699 {
1700 struct nexthop_group *ng = NULL;
1701 struct nhg_backup_info *bnhg = NULL;
1702 uint16_t i;
1703 struct nexthop *last_nh = NULL;
1704
1705 assert(!(png && pbnhg));
1706
1707 if (png)
1708 ng = nexthop_group_new();
1709
1710 if (pbnhg && backup_nh_num > 0) {
1711 if (IS_ZEBRA_DEBUG_RECV)
1712 zlog_debug("%s: adding %d backup nexthops", __func__,
1713 backup_nh_num);
1714
1715 bnhg = zebra_nhg_backup_alloc();
1716 }
1717
1718 /*
1719 * TBD should _all_ of the nexthop add operations use
1720 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1721 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1722 */
1723 for (i = 0; i < nexthop_num; i++) {
1724 struct nexthop *nexthop;
1725 enum lsp_types_t label_type;
1726 char nhbuf[NEXTHOP_STRLEN];
1727 char labelbuf[MPLS_LABEL_STRLEN];
1728 struct zapi_nexthop *api_nh = &nhops[i];
1729
1730 /* Convert zapi nexthop */
1731 nexthop = nexthop_from_zapi(api_nh, flags, p, backup_nh_num);
1732 if (!nexthop) {
1733 flog_warn(
1734 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1735 "%s: Nexthops Specified: %u(%u) but we failed to properly create one",
1736 __func__, nexthop_num, i);
1737 if (ng)
1738 nexthop_group_delete(&ng);
1739 if (bnhg)
1740 zebra_nhg_backup_free(&bnhg);
1741 return false;
1742 }
1743
1744 if (bnhg
1745 && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) {
1746 if (IS_ZEBRA_DEBUG_RECV) {
1747 nexthop2str(nexthop, nhbuf, sizeof(nhbuf));
1748 zlog_debug("%s: backup nh %s with BACKUP flag!",
1749 __func__, nhbuf);
1750 }
1751 UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP);
1752 nexthop->backup_num = 0;
1753 }
1754
1755 if (CHECK_FLAG(message, ZAPI_MESSAGE_SRTE)) {
1756 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_SRTE);
1757 nexthop->srte_color = api_nh->srte_color;
1758 }
1759
1760 /* MPLS labels for BGP-LU or Segment Routing */
1761 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_LABEL)
1762 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1763 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE
1764 && api_nh->label_num > 0) {
1765
1766 label_type = lsp_type_from_re_type(client->proto);
1767 nexthop_add_labels(nexthop, label_type,
1768 api_nh->label_num,
1769 &api_nh->labels[0]);
1770 }
1771
1772 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6LOCAL)
1773 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1774 if (IS_ZEBRA_DEBUG_RECV)
1775 zlog_debug("%s: adding seg6local action %s",
1776 __func__,
1777 seg6local_action2str(
1778 api_nh->seg6local_action));
1779
1780 nexthop_add_srv6_seg6local(nexthop,
1781 api_nh->seg6local_action,
1782 &api_nh->seg6local_ctx);
1783 }
1784
1785 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6)
1786 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1787 if (IS_ZEBRA_DEBUG_RECV)
1788 zlog_debug("%s: adding seg6", __func__);
1789
1790 nexthop_add_srv6_seg6(nexthop, &api_nh->seg6_segs);
1791 }
1792
1793 if (IS_ZEBRA_DEBUG_RECV) {
1794 labelbuf[0] = '\0';
1795 nhbuf[0] = '\0';
1796
1797 nexthop2str(nexthop, nhbuf, sizeof(nhbuf));
1798
1799 if (nexthop->nh_label &&
1800 nexthop->nh_label->num_labels > 0) {
1801 mpls_label2str(nexthop->nh_label->num_labels,
1802 nexthop->nh_label->label,
1803 labelbuf, sizeof(labelbuf),
1804 false);
1805 }
1806
1807 zlog_debug("%s: nh=%s, vrf_id=%d %s",
1808 __func__, nhbuf, api_nh->vrf_id, labelbuf);
1809 }
1810
1811 if (ng) {
1812 /* Add new nexthop to temporary list. This list is
1813 * canonicalized - sorted - so that it can be hashed
1814 * later in route processing. We expect that the sender
1815 * has sent the list sorted, and the zapi client api
1816 * attempts to enforce that, so this should be
1817 * inexpensive - but it is necessary to support shared
1818 * nexthop-groups.
1819 */
1820 nexthop_group_add_sorted(ng, nexthop);
1821 }
1822 if (bnhg) {
1823 /* Note that the order of the backup nexthops is
1824 * significant, so we don't sort this list as we do the
1825 * primary nexthops, we just append.
1826 */
1827 if (last_nh)
1828 NEXTHOP_APPEND(last_nh, nexthop);
1829 else
1830 bnhg->nhe->nhg.nexthop = nexthop;
1831
1832 last_nh = nexthop;
1833 }
1834 }
1835
1836
1837 /* succesfully read, set caller pointers now */
1838 if (png)
1839 *png = ng;
1840
1841 if (pbnhg)
1842 *pbnhg = bnhg;
1843
1844 return true;
1845 }
1846
1847 static int zapi_nhg_decode(struct stream *s, int cmd, struct zapi_nhg *api_nhg)
1848 {
1849 uint16_t i;
1850 struct zapi_nexthop *znh;
1851
1852 STREAM_GETW(s, api_nhg->proto);
1853 STREAM_GETL(s, api_nhg->id);
1854
1855 if (cmd == ZEBRA_NHG_DEL)
1856 goto done;
1857
1858 /* Nexthops */
1859 STREAM_GETW(s, api_nhg->nexthop_num);
1860
1861 if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->nexthop_num))
1862 return -1;
1863
1864 if (api_nhg->nexthop_num <= 0) {
1865 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1866 "%s: No nexthops sent", __func__);
1867 return -1;
1868 }
1869
1870 for (i = 0; i < api_nhg->nexthop_num; i++) {
1871 znh = &((api_nhg->nexthops)[i]);
1872
1873 if (zapi_nexthop_decode(s, znh, 0, 0) != 0) {
1874 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1875 "%s: Nexthop creation failed", __func__);
1876 return -1;
1877 }
1878 }
1879
1880 /* Backup Nexthops */
1881 STREAM_GETW(s, api_nhg->backup_nexthop_num);
1882
1883 if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->backup_nexthop_num))
1884 return -1;
1885
1886 for (i = 0; i < api_nhg->backup_nexthop_num; i++) {
1887 znh = &((api_nhg->backup_nexthops)[i]);
1888
1889 if (zapi_nexthop_decode(s, znh, 0, 0) != 0) {
1890 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1891 "%s: Backup Nexthop creation failed",
1892 __func__);
1893 return -1;
1894 }
1895 }
1896
1897 done:
1898 return 0;
1899
1900 stream_failure:
1901 flog_warn(
1902 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1903 "%s: Nexthop Group decode failed with some sort of stream read failure",
1904 __func__);
1905 return -1;
1906 }
1907
1908 static void zread_nhg_del(ZAPI_HANDLER_ARGS)
1909 {
1910 struct stream *s;
1911 struct zapi_nhg api_nhg = {};
1912 struct nhg_hash_entry *nhe;
1913
1914 s = msg;
1915 if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) {
1916 if (IS_ZEBRA_DEBUG_RECV)
1917 zlog_debug("%s: Unable to decode zapi_nhg sent",
1918 __func__);
1919 return;
1920 }
1921
1922 /*
1923 * Delete the received nhg id
1924 */
1925 nhe = zebra_nhg_proto_del(api_nhg.id, api_nhg.proto);
1926
1927 if (nhe) {
1928 zebra_nhg_decrement_ref(nhe);
1929 zsend_nhg_notify(api_nhg.proto, client->instance,
1930 client->session_id, api_nhg.id,
1931 ZAPI_NHG_REMOVED);
1932 } else
1933 zsend_nhg_notify(api_nhg.proto, client->instance,
1934 client->session_id, api_nhg.id,
1935 ZAPI_NHG_REMOVE_FAIL);
1936 }
1937
1938 static void zread_nhg_add(ZAPI_HANDLER_ARGS)
1939 {
1940 struct stream *s;
1941 struct zapi_nhg api_nhg = {};
1942 struct nexthop_group *nhg = NULL;
1943 struct nhg_backup_info *bnhg = NULL;
1944 struct nhg_hash_entry *nhe;
1945
1946 s = msg;
1947 if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) {
1948 if (IS_ZEBRA_DEBUG_RECV)
1949 zlog_debug("%s: Unable to decode zapi_nhg sent",
1950 __func__);
1951 return;
1952 }
1953
1954 if ((!zapi_read_nexthops(client, NULL, api_nhg.nexthops, 0, 0,
1955 api_nhg.nexthop_num,
1956 api_nhg.backup_nexthop_num, &nhg, NULL))
1957 || (!zapi_read_nexthops(client, NULL, api_nhg.backup_nexthops, 0, 0,
1958 api_nhg.backup_nexthop_num,
1959 api_nhg.backup_nexthop_num, NULL, &bnhg))) {
1960
1961 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1962 "%s: Nexthop Group Creation failed", __func__);
1963
1964 /* Free any local allocations */
1965 nexthop_group_delete(&nhg);
1966 zebra_nhg_backup_free(&bnhg);
1967
1968 return;
1969 }
1970
1971 /* Create a temporary nhe */
1972 nhe = zebra_nhg_alloc();
1973 nhe->id = api_nhg.id;
1974 nhe->type = api_nhg.proto;
1975 nhe->zapi_instance = client->instance;
1976 nhe->zapi_session = client->session_id;
1977
1978 /* Take over the list(s) of nexthops */
1979 nhe->nhg.nexthop = nhg->nexthop;
1980 nhg->nexthop = NULL;
1981
1982 if (bnhg) {
1983 nhe->backup_info = bnhg;
1984 bnhg = NULL;
1985 }
1986
1987 /*
1988 * TODO:
1989 * Assume fully resolved for now and install.
1990 * Resolution is going to need some more work.
1991 */
1992
1993 /* Enqueue to workqueue for processing */
1994 rib_queue_nhe_add(nhe);
1995
1996 /* Free any local allocations */
1997 nexthop_group_delete(&nhg);
1998 zebra_nhg_backup_free(&bnhg);
1999
2000 }
2001
2002 static void zread_route_add(ZAPI_HANDLER_ARGS)
2003 {
2004 struct stream *s;
2005 struct zapi_route api;
2006 afi_t afi;
2007 struct prefix_ipv6 *src_p = NULL;
2008 struct route_entry *re;
2009 struct nexthop_group *ng = NULL;
2010 struct nhg_backup_info *bnhg = NULL;
2011 int ret;
2012 vrf_id_t vrf_id;
2013 struct nhg_hash_entry nhe;
2014
2015 s = msg;
2016 if (zapi_route_decode(s, &api) < 0) {
2017 if (IS_ZEBRA_DEBUG_RECV)
2018 zlog_debug("%s: Unable to decode zapi_route sent",
2019 __func__);
2020 return;
2021 }
2022
2023 vrf_id = zvrf_id(zvrf);
2024
2025 if (IS_ZEBRA_DEBUG_RECV)
2026 zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x",
2027 __func__, vrf_id, api.tableid, &api.prefix,
2028 (int)api.message, api.flags);
2029
2030 /* Allocate new route. */
2031 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
2032 re->type = api.type;
2033 re->instance = api.instance;
2034 re->flags = api.flags;
2035 re->uptime = monotime(NULL);
2036 re->vrf_id = vrf_id;
2037
2038 if (api.tableid)
2039 re->table = api.tableid;
2040 else
2041 re->table = zvrf->table_id;
2042
2043 if (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NHG)
2044 && (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)
2045 || api.nexthop_num == 0)) {
2046 flog_warn(
2047 EC_ZEBRA_RX_ROUTE_NO_NEXTHOPS,
2048 "%s: received a route without nexthops for prefix %pFX from client %s",
2049 __func__, &api.prefix,
2050 zebra_route_string(client->proto));
2051
2052 XFREE(MTYPE_RE, re);
2053 return;
2054 }
2055
2056 /* Report misuse of the backup flag */
2057 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS)
2058 && api.backup_nexthop_num == 0) {
2059 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
2060 zlog_debug(
2061 "%s: client %s: BACKUP flag set but no backup nexthops, prefix %pFX",
2062 __func__, zebra_route_string(client->proto),
2063 &api.prefix);
2064 }
2065
2066 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NHG))
2067 re->nhe_id = api.nhgid;
2068
2069 if (!re->nhe_id
2070 && (!zapi_read_nexthops(client, &api.prefix, api.nexthops,
2071 api.flags, api.message, api.nexthop_num,
2072 api.backup_nexthop_num, &ng, NULL)
2073 || !zapi_read_nexthops(client, &api.prefix, api.backup_nexthops,
2074 api.flags, api.message,
2075 api.backup_nexthop_num,
2076 api.backup_nexthop_num, NULL, &bnhg))) {
2077
2078 nexthop_group_delete(&ng);
2079 zebra_nhg_backup_free(&bnhg);
2080 XFREE(MTYPE_RE, re);
2081 return;
2082 }
2083
2084 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
2085 re->distance = api.distance;
2086 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
2087 re->metric = api.metric;
2088 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
2089 re->tag = api.tag;
2090 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
2091 re->mtu = api.mtu;
2092
2093 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_OPAQUE)) {
2094 re->opaque =
2095 XMALLOC(MTYPE_RE_OPAQUE,
2096 sizeof(struct re_opaque) + api.opaque.length);
2097 re->opaque->length = api.opaque.length;
2098 memcpy(re->opaque->data, api.opaque.data, re->opaque->length);
2099 }
2100
2101 afi = family2afi(api.prefix.family);
2102 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
2103 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
2104 "%s: Received SRC Prefix but afi is not v6",
2105 __func__);
2106 nexthop_group_delete(&ng);
2107 zebra_nhg_backup_free(&bnhg);
2108 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2109 XFREE(MTYPE_RE, re);
2110 return;
2111 }
2112 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
2113 src_p = &api.src_prefix;
2114
2115 if (api.safi != SAFI_UNICAST && api.safi != SAFI_MULTICAST) {
2116 flog_warn(EC_LIB_ZAPI_MISSMATCH,
2117 "%s: Received safi: %d but we can only accept UNICAST or MULTICAST",
2118 __func__, api.safi);
2119 nexthop_group_delete(&ng);
2120 zebra_nhg_backup_free(&bnhg);
2121 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2122 XFREE(MTYPE_RE, re);
2123 return;
2124 }
2125
2126 /*
2127 * If we have an ID, this proto owns the NHG it sent along with the
2128 * route, so we just send the ID into rib code with it.
2129 *
2130 * Havent figured out how to handle backup NHs with this yet, so lets
2131 * keep that separate.
2132 * Include backup info with the route. We use a temporary nhe here;
2133 * if this is a new/unknown nhe, a new copy will be allocated
2134 * and stored.
2135 */
2136 if (!re->nhe_id) {
2137 zebra_nhe_init(&nhe, afi, ng->nexthop);
2138 nhe.nhg.nexthop = ng->nexthop;
2139 nhe.backup_info = bnhg;
2140 }
2141 ret = rib_add_multipath_nhe(afi, api.safi, &api.prefix, src_p,
2142 re, &nhe, false);
2143
2144 /*
2145 * rib_add_multipath_nhe only fails in a couple spots
2146 * and in those spots we have not freed memory
2147 */
2148 if (ret == -1) {
2149 client->error_cnt++;
2150 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2151 XFREE(MTYPE_RE, re);
2152 }
2153
2154 /* At this point, these allocations are not needed: 're' has been
2155 * retained or freed, and if 're' still exists, it is using
2156 * a reference to a shared group object.
2157 */
2158 nexthop_group_delete(&ng);
2159 if (bnhg)
2160 zebra_nhg_backup_free(&bnhg);
2161
2162 /* Stats */
2163 switch (api.prefix.family) {
2164 case AF_INET:
2165 if (ret == 0)
2166 client->v4_route_add_cnt++;
2167 else if (ret == 1)
2168 client->v4_route_upd8_cnt++;
2169 break;
2170 case AF_INET6:
2171 if (ret == 0)
2172 client->v6_route_add_cnt++;
2173 else if (ret == 1)
2174 client->v6_route_upd8_cnt++;
2175 break;
2176 }
2177 }
2178
2179 void zapi_re_opaque_free(struct re_opaque *opaque)
2180 {
2181 XFREE(MTYPE_RE_OPAQUE, opaque);
2182 }
2183
2184 static void zread_route_del(ZAPI_HANDLER_ARGS)
2185 {
2186 struct stream *s;
2187 struct zapi_route api;
2188 afi_t afi;
2189 struct prefix_ipv6 *src_p = NULL;
2190 uint32_t table_id;
2191
2192 s = msg;
2193 if (zapi_route_decode(s, &api) < 0)
2194 return;
2195
2196 afi = family2afi(api.prefix.family);
2197 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
2198 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
2199 "%s: Received a src prefix while afi is not v6",
2200 __func__);
2201 return;
2202 }
2203 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
2204 src_p = &api.src_prefix;
2205
2206 if (api.tableid)
2207 table_id = api.tableid;
2208 else
2209 table_id = zvrf->table_id;
2210
2211 if (IS_ZEBRA_DEBUG_RECV)
2212 zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x",
2213 __func__, zvrf_id(zvrf), table_id, &api.prefix,
2214 (int)api.message, api.flags);
2215
2216 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
2217 api.flags, &api.prefix, src_p, NULL, 0, table_id, api.metric,
2218 api.distance, false);
2219
2220 /* Stats */
2221 switch (api.prefix.family) {
2222 case AF_INET:
2223 client->v4_route_del_cnt++;
2224 break;
2225 case AF_INET6:
2226 client->v6_route_del_cnt++;
2227 break;
2228 }
2229 }
2230
2231 /* MRIB Nexthop lookup for IPv4. */
2232 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
2233 {
2234 struct in_addr addr;
2235 struct route_entry *re;
2236
2237 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
2238 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
2239 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
2240
2241 stream_failure:
2242 return;
2243 }
2244
2245 /* Register zebra server router-id information. Send current router-id */
2246 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
2247 {
2248 afi_t afi;
2249 struct prefix p;
2250 struct prefix zero;
2251
2252 STREAM_GETW(msg, afi);
2253
2254 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
2255 zlog_warn(
2256 "Invalid AFI %u while registering for router ID notifications",
2257 afi);
2258 goto stream_failure;
2259 }
2260
2261 /* Router-id information is needed. */
2262 vrf_bitmap_set(client->ridinfo[afi], zvrf_id(zvrf));
2263
2264 router_id_get(afi, &p, zvrf);
2265
2266 /*
2267 * If we have not officially setup a router-id let's not
2268 * tell the upper level protocol about it yet.
2269 */
2270 memset(&zero, 0, sizeof(zero));
2271 if ((p.family == AF_INET && p.u.prefix4.s_addr == INADDR_ANY)
2272 || (p.family == AF_INET6
2273 && memcmp(&p.u.prefix6, &zero.u.prefix6,
2274 sizeof(struct in6_addr))
2275 == 0))
2276 return;
2277
2278 zsend_router_id_update(client, afi, &p, zvrf_id(zvrf));
2279
2280 stream_failure:
2281 return;
2282 }
2283
2284 /* Unregister zebra server router-id information. */
2285 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
2286 {
2287 afi_t afi;
2288
2289 STREAM_GETW(msg, afi);
2290
2291 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
2292 zlog_warn(
2293 "Invalid AFI %u while unregistering from router ID notifications",
2294 afi);
2295 goto stream_failure;
2296 }
2297
2298 vrf_bitmap_unset(client->ridinfo[afi], zvrf_id(zvrf));
2299
2300 stream_failure:
2301 return;
2302 }
2303
2304 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
2305 {
2306 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2307
2308 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
2309 stream_putl(s, vrf_get_backend());
2310 stream_putc(s, mpls_enabled);
2311 stream_putl(s, zrouter.multipath_num);
2312 stream_putc(s, zebra_mlag_get_role());
2313
2314 stream_putw_at(s, 0, stream_get_endp(s));
2315 zserv_send_message(client, s);
2316 }
2317
2318 void zsend_capabilities_all_clients(void)
2319 {
2320 struct listnode *node, *nnode;
2321 struct zebra_vrf *zvrf;
2322 struct zserv *client;
2323
2324 zvrf = vrf_info_lookup(VRF_DEFAULT);
2325 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
2326 /* Do not send unsolicited messages to synchronous clients. */
2327 if (client->synchronous)
2328 continue;
2329
2330 zsend_capabilities(client, zvrf);
2331 }
2332 }
2333
2334 /* Tie up route-type and client->sock */
2335 static void zread_hello(ZAPI_HANDLER_ARGS)
2336 {
2337 /* type of protocol (lib/zebra.h) */
2338 uint8_t proto;
2339 unsigned short instance;
2340 uint8_t notify;
2341 uint8_t synchronous;
2342 uint32_t session_id;
2343
2344 STREAM_GETC(msg, proto);
2345 STREAM_GETW(msg, instance);
2346 STREAM_GETL(msg, session_id);
2347 STREAM_GETC(msg, notify);
2348 STREAM_GETC(msg, synchronous);
2349 if (notify)
2350 client->notify_owner = true;
2351
2352 if (synchronous)
2353 client->synchronous = true;
2354
2355 /* accept only dynamic routing protocols */
2356 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
2357 zlog_notice(
2358 "client %d says hello and bids fair to announce only %s routes vrf=%u",
2359 client->sock, zebra_route_string(proto),
2360 zvrf->vrf->vrf_id);
2361 if (instance)
2362 zlog_notice("client protocol instance %d", instance);
2363
2364 client->proto = proto;
2365 client->instance = instance;
2366 client->session_id = session_id;
2367
2368 /* Graceful restart processing for client connect */
2369 zebra_gr_client_reconnect(client);
2370 }
2371
2372 if (!client->synchronous) {
2373 zsend_capabilities(client, zvrf);
2374 zebra_vrf_update_all(client);
2375 }
2376 stream_failure:
2377 return;
2378 }
2379
2380 /* Unregister all information in a VRF. */
2381 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
2382 {
2383 int i;
2384 afi_t afi;
2385
2386 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2387 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
2388 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
2389 vrf_bitmap_unset(client->redist_default[afi], zvrf_id(zvrf));
2390 vrf_bitmap_unset(client->ridinfo[afi], zvrf_id(zvrf));
2391 vrf_bitmap_unset(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
2392 }
2393 }
2394
2395 /*
2396 * Validate incoming zapi mpls lsp / labels message
2397 */
2398 static int zapi_labels_validate(const struct zapi_labels *zl)
2399 {
2400 int ret = -1;
2401 int i, j, idx;
2402 uint32_t bits[8];
2403 uint32_t ival;
2404 const struct zapi_nexthop *znh;
2405
2406 /* Validate backup info: no duplicates for a single primary */
2407 if (zl->backup_nexthop_num == 0) {
2408 ret = 0;
2409 goto done;
2410 }
2411
2412 for (j = 0; j < zl->nexthop_num; j++) {
2413 znh = &zl->nexthops[j];
2414
2415 memset(bits, 0, sizeof(bits));
2416
2417 for (i = 0; i < znh->backup_num; i++) {
2418 idx = znh->backup_idx[i] / 32;
2419
2420 ival = 1 << znh->backup_idx[i] % 32;
2421
2422 /* Check whether value is already used */
2423 if (ival & bits[idx]) {
2424 /* Fail */
2425
2426 if (IS_ZEBRA_DEBUG_RECV)
2427 zlog_debug("%s: invalid zapi mpls message: duplicate backup nexthop index %d",
2428 __func__,
2429 znh->backup_idx[i]);
2430 goto done;
2431 }
2432
2433 /* Mark index value */
2434 bits[idx] |= ival;
2435 }
2436 }
2437
2438 ret = 0;
2439
2440 done:
2441
2442 return ret;
2443 }
2444
2445 /*
2446 * Handle request to create an MPLS LSP.
2447 *
2448 * A single message can fully specify an LSP with multiple nexthops.
2449 *
2450 * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is
2451 * updated to use the received label(s).
2452 */
2453 static void zread_mpls_labels_add(ZAPI_HANDLER_ARGS)
2454 {
2455 struct stream *s;
2456 struct zapi_labels zl;
2457 int ret;
2458
2459 /* Get input stream. */
2460 s = msg;
2461 if (zapi_labels_decode(s, &zl) < 0) {
2462 if (IS_ZEBRA_DEBUG_RECV)
2463 zlog_debug("%s: Unable to decode zapi_labels sent",
2464 __func__);
2465 return;
2466 }
2467
2468 if (!mpls_enabled)
2469 return;
2470
2471 /* Validate; will debug on failure */
2472 if (zapi_labels_validate(&zl) < 0)
2473 return;
2474
2475 ret = mpls_zapi_labels_process(true, zvrf, &zl);
2476 if (ret < 0) {
2477 if (IS_ZEBRA_DEBUG_RECV)
2478 zlog_debug("%s: Error processing zapi request",
2479 __func__);
2480 }
2481 }
2482
2483 /*
2484 * Handle request to delete an MPLS LSP.
2485 *
2486 * An LSP is identified by its type and local label. When the received message
2487 * doesn't contain any nexthop, the whole LSP is deleted. Otherwise, only the
2488 * listed LSP nexthops (aka NHLFEs) are deleted.
2489 *
2490 * When the optional ZAPI_LABELS_FTN flag is set, the labels of the specified
2491 * FEC (route) nexthops are deleted.
2492 */
2493 static void zread_mpls_labels_delete(ZAPI_HANDLER_ARGS)
2494 {
2495 struct stream *s;
2496 struct zapi_labels zl;
2497 int ret;
2498
2499 /* Get input stream. */
2500 s = msg;
2501 if (zapi_labels_decode(s, &zl) < 0) {
2502 if (IS_ZEBRA_DEBUG_RECV)
2503 zlog_debug("%s: Unable to decode zapi_labels sent",
2504 __func__);
2505 return;
2506 }
2507
2508 if (!mpls_enabled)
2509 return;
2510
2511 if (zl.nexthop_num > 0) {
2512 ret = mpls_zapi_labels_process(false /*delete*/, zvrf, &zl);
2513 if (ret < 0) {
2514 if (IS_ZEBRA_DEBUG_RECV)
2515 zlog_debug("%s: Error processing zapi request",
2516 __func__);
2517 }
2518 } else {
2519 mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label);
2520
2521 if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
2522 mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix,
2523 zl.route.type, zl.route.instance);
2524 }
2525 }
2526
2527 /*
2528 * Handle request to add an MPLS LSP or change an existing one.
2529 *
2530 * A single message can fully specify an LSP with multiple nexthops.
2531 *
2532 * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is
2533 * updated to use the received label(s).
2534 *
2535 * NOTE: zebra will use route replace semantics (make-before-break) to update
2536 * the LSP in the forwarding plane if that's supported by the underlying
2537 * platform.
2538 */
2539 static void zread_mpls_labels_replace(ZAPI_HANDLER_ARGS)
2540 {
2541 struct stream *s;
2542 struct zapi_labels zl;
2543
2544 /* Get input stream. */
2545 s = msg;
2546 if (zapi_labels_decode(s, &zl) < 0) {
2547 if (IS_ZEBRA_DEBUG_RECV)
2548 zlog_debug("%s: Unable to decode zapi_labels sent",
2549 __func__);
2550 return;
2551 }
2552
2553 if (!mpls_enabled)
2554 return;
2555
2556 /* Validate; will debug on failure */
2557 if (zapi_labels_validate(&zl) < 0)
2558 return;
2559
2560 /* This removes everything, then re-adds from the client's
2561 * zapi message. Since the LSP will be processed later, on this
2562 * this same pthread, all of the changes will 'appear' at once.
2563 */
2564 mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label);
2565 if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
2566 mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix,
2567 zl.route.type, zl.route.instance);
2568
2569 mpls_zapi_labels_process(true, zvrf, &zl);
2570 }
2571
2572 static void zread_sr_policy_set(ZAPI_HANDLER_ARGS)
2573 {
2574 struct stream *s;
2575 struct zapi_sr_policy zp;
2576 struct zapi_srte_tunnel *zt;
2577 struct zebra_sr_policy *policy;
2578
2579 /* Get input stream. */
2580 s = msg;
2581 if (zapi_sr_policy_decode(s, &zp) < 0) {
2582 if (IS_ZEBRA_DEBUG_RECV)
2583 zlog_debug("%s: Unable to decode zapi_sr_policy sent",
2584 __func__);
2585 return;
2586 }
2587 zt = &zp.segment_list;
2588 if (zt->label_num < 1) {
2589 if (IS_ZEBRA_DEBUG_RECV)
2590 zlog_debug(
2591 "%s: SR-TE tunnel must contain at least one label",
2592 __func__);
2593 return;
2594 }
2595
2596 if (!mpls_enabled)
2597 return;
2598
2599 policy = zebra_sr_policy_find(zp.color, &zp.endpoint);
2600 if (!policy)
2601 policy = zebra_sr_policy_add(zp.color, &zp.endpoint, zp.name);
2602 /* TODO: per-VRF list of SR-TE policies. */
2603 policy->zvrf = zvrf;
2604
2605 zebra_sr_policy_validate(policy, &zp.segment_list);
2606 }
2607
2608 static void zread_sr_policy_delete(ZAPI_HANDLER_ARGS)
2609 {
2610 struct stream *s;
2611 struct zapi_sr_policy zp;
2612 struct zebra_sr_policy *policy;
2613
2614 /* Get input stream. */
2615 s = msg;
2616 if (zapi_sr_policy_decode(s, &zp) < 0) {
2617 if (IS_ZEBRA_DEBUG_RECV)
2618 zlog_debug("%s: Unable to decode zapi_sr_policy sent",
2619 __func__);
2620 return;
2621 }
2622
2623 if (!mpls_enabled)
2624 return;
2625
2626 policy = zebra_sr_policy_find(zp.color, &zp.endpoint);
2627 if (!policy) {
2628 if (IS_ZEBRA_DEBUG_RECV)
2629 zlog_debug("%s: Unable to find SR-TE policy", __func__);
2630 return;
2631 }
2632
2633 zebra_sr_policy_del(policy);
2634 }
2635
2636 int zsend_sr_policy_notify_status(uint32_t color, struct ipaddr *endpoint,
2637 char *name, int status)
2638 {
2639 struct zserv *client;
2640 struct stream *s;
2641
2642 client = zserv_find_client(ZEBRA_ROUTE_SRTE, 0);
2643 if (!client) {
2644 if (IS_ZEBRA_DEBUG_PACKET)
2645 zlog_debug(
2646 "Not notifying pathd about policy %s"
2647 " status change to %d",
2648 name, status);
2649 return 0;
2650 }
2651
2652 if (IS_ZEBRA_DEBUG_PACKET)
2653 zlog_debug(
2654 "Notifying pathd about policy %s status change"
2655 " to %d",
2656 name, status);
2657
2658 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2659 stream_reset(s);
2660
2661 zclient_create_header(s, ZEBRA_SR_POLICY_NOTIFY_STATUS, VRF_DEFAULT);
2662 stream_putl(s, color);
2663 stream_put_ipaddr(s, endpoint);
2664 stream_write(s, name, SRTE_POLICY_NAME_MAX_LENGTH);
2665 stream_putl(s, status);
2666
2667 stream_putw_at(s, 0, stream_get_endp(s));
2668
2669 return zserv_send_message(client, s);
2670 }
2671
2672 /* Send client close notify to client */
2673 int zsend_client_close_notify(struct zserv *client, struct zserv *closed_client)
2674 {
2675 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2676
2677 zclient_create_header(s, ZEBRA_CLIENT_CLOSE_NOTIFY, VRF_DEFAULT);
2678
2679 stream_putc(s, closed_client->proto);
2680 stream_putw(s, closed_client->instance);
2681 stream_putl(s, closed_client->session_id);
2682
2683 stream_putw_at(s, 0, stream_get_endp(s));
2684
2685 return zserv_send_message(client, s);
2686 }
2687
2688 int zsend_srv6_manager_get_locator_chunk_response(struct zserv *client,
2689 vrf_id_t vrf_id,
2690 struct srv6_locator *loc)
2691 {
2692 struct srv6_locator_chunk chunk = {};
2693 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2694
2695 strlcpy(chunk.locator_name, loc->name, sizeof(chunk.locator_name));
2696 chunk.prefix = loc->prefix;
2697 chunk.block_bits_length = loc->block_bits_length;
2698 chunk.node_bits_length = loc->node_bits_length;
2699 chunk.function_bits_length = loc->function_bits_length;
2700 chunk.argument_bits_length = loc->argument_bits_length;
2701 chunk.keep = 0;
2702 chunk.proto = client->proto;
2703 chunk.instance = client->instance;
2704
2705 zclient_create_header(s, ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK, vrf_id);
2706 zapi_srv6_locator_chunk_encode(s, &chunk);
2707 stream_putw_at(s, 0, stream_get_endp(s));
2708 return zserv_send_message(client, s);
2709 }
2710
2711 /* Send response to a table manager connect request to client */
2712 static void zread_table_manager_connect(struct zserv *client,
2713 struct stream *msg, vrf_id_t vrf_id)
2714 {
2715 struct stream *s;
2716 uint8_t proto;
2717 uint16_t instance;
2718 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
2719
2720 s = msg;
2721
2722 /* Get data. */
2723 STREAM_GETC(s, proto);
2724 STREAM_GETW(s, instance);
2725
2726 /* accept only dynamic routing protocols */
2727 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
2728 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
2729 "client %d has wrong protocol %s", client->sock,
2730 zebra_route_string(proto));
2731 zsend_table_manager_connect_response(client, vrf_id, 1);
2732 return;
2733 }
2734 zlog_notice("client %d with vrf %s(%u) instance %u connected as %s",
2735 client->sock, VRF_LOGNAME(vrf), vrf_id, instance,
2736 zebra_route_string(proto));
2737 client->proto = proto;
2738 client->instance = instance;
2739
2740 /*
2741 * Release previous labels of same protocol and instance.
2742 * This is done in case it restarted from an unexpected shutdown.
2743 */
2744 release_daemon_table_chunks(client);
2745
2746 zsend_table_manager_connect_response(client, vrf_id, 0);
2747
2748 stream_failure:
2749 return;
2750 }
2751
2752 static void zread_label_manager_connect(struct zserv *client,
2753 struct stream *msg, vrf_id_t vrf_id)
2754 {
2755 struct stream *s;
2756 /* type of protocol (lib/zebra.h) */
2757 uint8_t proto;
2758 unsigned short instance;
2759
2760 /* Get input stream. */
2761 s = msg;
2762
2763 /* Get data. */
2764 STREAM_GETC(s, proto);
2765 STREAM_GETW(s, instance);
2766
2767 /* accept only dynamic routing protocols */
2768 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
2769 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
2770 "client %d has wrong protocol %s", client->sock,
2771 zebra_route_string(proto));
2772 zsend_label_manager_connect_response(client, vrf_id, 1);
2773 return;
2774 }
2775
2776 /* recall proto and instance in this socket */
2777 client->proto = proto;
2778 client->instance = instance;
2779
2780 /* call hook for connection using wrapper */
2781 lm_client_connect_call(client, vrf_id);
2782
2783 stream_failure:
2784 return;
2785 }
2786
2787 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
2788 vrf_id_t vrf_id)
2789 {
2790 struct stream *s;
2791 uint8_t keep;
2792 uint32_t size, base;
2793 struct label_manager_chunk *lmc = NULL;
2794 uint8_t proto;
2795 unsigned short instance;
2796
2797 /* Get input stream. */
2798 s = msg;
2799
2800 /* Get data. */
2801 STREAM_GETC(s, proto);
2802 STREAM_GETW(s, instance);
2803 STREAM_GETC(s, keep);
2804 STREAM_GETL(s, size);
2805 STREAM_GETL(s, base);
2806
2807 assert(proto == client->proto && instance == client->instance);
2808
2809 /* call hook to get a chunk using wrapper */
2810 lm_get_chunk_call(&lmc, client, keep, size, base, vrf_id);
2811
2812 stream_failure:
2813 return;
2814 }
2815
2816 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
2817 {
2818 struct stream *s;
2819 uint32_t start, end;
2820 uint8_t proto;
2821 unsigned short instance;
2822
2823 /* Get input stream. */
2824 s = msg;
2825
2826 /* Get data. */
2827 STREAM_GETC(s, proto);
2828 STREAM_GETW(s, instance);
2829 STREAM_GETL(s, start);
2830 STREAM_GETL(s, end);
2831
2832 assert(proto == client->proto && instance == client->instance);
2833
2834 /* call hook to release a chunk using wrapper */
2835 lm_release_chunk_call(client, start, end);
2836
2837 stream_failure:
2838 return;
2839 }
2840
2841 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
2842 {
2843 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT
2844 || hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC)
2845 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
2846 else {
2847 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
2848 zread_get_label_chunk(client, msg, zvrf_id(zvrf));
2849 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
2850 zread_release_label_chunk(client, msg);
2851 }
2852 }
2853
2854 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
2855 struct zebra_vrf *zvrf)
2856 {
2857 struct stream *s;
2858 uint32_t size;
2859 struct table_manager_chunk *tmc;
2860
2861 /* Get input stream. */
2862 s = msg;
2863
2864 /* Get data. */
2865 STREAM_GETL(s, size);
2866
2867 tmc = assign_table_chunk(client->proto, client->instance, size, zvrf);
2868 if (!tmc)
2869 flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK,
2870 "%s: Unable to assign Table Chunk of size %u",
2871 __func__, size);
2872 else
2873 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
2874 tmc->end);
2875 /* send response back */
2876 zsend_assign_table_chunk_response(client, zvrf_id(zvrf), tmc);
2877
2878 stream_failure:
2879 return;
2880 }
2881
2882 static void zread_release_table_chunk(struct zserv *client, struct stream *msg,
2883 struct zebra_vrf *zvrf)
2884 {
2885 struct stream *s;
2886 uint32_t start, end;
2887
2888 /* Get input stream. */
2889 s = msg;
2890
2891 /* Get data. */
2892 STREAM_GETL(s, start);
2893 STREAM_GETL(s, end);
2894
2895 release_table_chunk(client->proto, client->instance, start, end, zvrf);
2896
2897 stream_failure:
2898 return;
2899 }
2900
2901 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2902 {
2903 /* to avoid sending other messages like ZEBRA_INTERFACE_UP */
2904 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2905 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2906 else {
2907 /* Sanity: don't allow 'unidentified' requests */
2908 if (!client->proto) {
2909 flog_err(
2910 EC_ZEBRA_TM_ALIENS,
2911 "Got SRv6 request from an unidentified client");
2912 return;
2913 }
2914 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2915 zread_get_table_chunk(client, msg, zvrf);
2916 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2917 zread_release_table_chunk(client, msg, zvrf);
2918 }
2919 }
2920
2921 static void zread_srv6_manager_get_locator_chunk(struct zserv *client,
2922 struct stream *msg,
2923 vrf_id_t vrf_id)
2924 {
2925 struct stream *s = msg;
2926 uint16_t len;
2927 char locator_name[SRV6_LOCNAME_SIZE] = {0};
2928
2929 /* Get data. */
2930 STREAM_GETW(s, len);
2931 STREAM_GET(locator_name, s, len);
2932
2933 /* call hook to get a chunk using wrapper */
2934 struct srv6_locator *loc = NULL;
2935 srv6_manager_get_locator_chunk_call(&loc, client, locator_name, vrf_id);
2936
2937 stream_failure:
2938 return;
2939 }
2940
2941 static void zread_srv6_manager_release_locator_chunk(struct zserv *client,
2942 struct stream *msg,
2943 vrf_id_t vrf_id)
2944 {
2945 struct stream *s = msg;
2946 uint16_t len;
2947 char locator_name[SRV6_LOCNAME_SIZE] = {0};
2948
2949 /* Get data. */
2950 STREAM_GETW(s, len);
2951 STREAM_GET(locator_name, s, len);
2952
2953 /* call hook to release a chunk using wrapper */
2954 srv6_manager_release_locator_chunk_call(client, locator_name, vrf_id);
2955
2956 stream_failure:
2957 return;
2958 }
2959
2960 static void zread_srv6_manager_request(ZAPI_HANDLER_ARGS)
2961 {
2962 switch (hdr->command) {
2963 case ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK:
2964 zread_srv6_manager_get_locator_chunk(client, msg,
2965 zvrf_id(zvrf));
2966 break;
2967 case ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK:
2968 zread_srv6_manager_release_locator_chunk(client, msg,
2969 zvrf_id(zvrf));
2970 break;
2971 default:
2972 zlog_err("%s: unknown SRv6 Manager command", __func__);
2973 break;
2974 }
2975 }
2976
2977 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2978 {
2979 struct stream *s;
2980 char ifname[IF_NAMESIZE];
2981 ifindex_t ifindex;
2982 int type;
2983 int af;
2984 union g_addr nexthop;
2985 uint32_t local_label;
2986 uint32_t remote_label;
2987 uint8_t flags;
2988 union pw_protocol_fields data;
2989 uint8_t protocol;
2990 struct zebra_pw *pw;
2991
2992 /* Get input stream. */
2993 s = msg;
2994
2995 /* Get data. */
2996 STREAM_GET(ifname, s, IF_NAMESIZE);
2997 ifname[IF_NAMESIZE - 1] = '\0';
2998 STREAM_GETL(s, ifindex);
2999 STREAM_GETL(s, type);
3000 STREAM_GETL(s, af);
3001 switch (af) {
3002 case AF_INET:
3003 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
3004 break;
3005 case AF_INET6:
3006 STREAM_GET(&nexthop.ipv6, s, 16);
3007 break;
3008 default:
3009 return;
3010 }
3011 STREAM_GETL(s, local_label);
3012 STREAM_GETL(s, remote_label);
3013 STREAM_GETC(s, flags);
3014 STREAM_GET(&data, s, sizeof(data));
3015 protocol = client->proto;
3016
3017 pw = zebra_pw_find(zvrf, ifname);
3018 switch (hdr->command) {
3019 case ZEBRA_PW_ADD:
3020 if (pw) {
3021 flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS,
3022 "%s: pseudowire %s already exists [%s]",
3023 __func__, ifname,
3024 zserv_command_string(hdr->command));
3025 return;
3026 }
3027
3028 zebra_pw_add(zvrf, ifname, protocol, client);
3029 break;
3030 case ZEBRA_PW_DELETE:
3031 if (!pw) {
3032 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
3033 "%s: pseudowire %s not found [%s]", __func__,
3034 ifname, zserv_command_string(hdr->command));
3035 return;
3036 }
3037
3038 zebra_pw_del(zvrf, pw);
3039 break;
3040 case ZEBRA_PW_SET:
3041 case ZEBRA_PW_UNSET:
3042 if (!pw) {
3043 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
3044 "%s: pseudowire %s not found [%s]", __func__,
3045 ifname, zserv_command_string(hdr->command));
3046 return;
3047 }
3048
3049 switch (hdr->command) {
3050 case ZEBRA_PW_SET:
3051 pw->enabled = 1;
3052 break;
3053 case ZEBRA_PW_UNSET:
3054 pw->enabled = 0;
3055 break;
3056 }
3057
3058 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
3059 remote_label, flags, &data);
3060 break;
3061 }
3062
3063 stream_failure:
3064 return;
3065 }
3066
3067 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
3068 {
3069 struct interface *master;
3070 struct interface *slave;
3071 struct stream *s = msg;
3072 int ifindex;
3073 vrf_id_t vrf_id;
3074
3075 STREAM_GETL(s, vrf_id);
3076 STREAM_GETL(s, ifindex);
3077 master = if_lookup_by_index(ifindex, vrf_id);
3078
3079 STREAM_GETL(s, vrf_id);
3080 STREAM_GETL(s, ifindex);
3081 slave = if_lookup_by_index(ifindex, vrf_id);
3082
3083 if (!master || !slave)
3084 return;
3085
3086 kernel_interface_set_master(master, slave);
3087
3088 stream_failure:
3089 return;
3090 }
3091
3092
3093 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
3094 {
3095 struct interface *ifp;
3096 mpls_label_t nlabel;
3097 afi_t afi;
3098 struct stream *s;
3099 struct zebra_vrf *def_zvrf;
3100 enum lsp_types_t ltype;
3101
3102 s = msg;
3103 STREAM_GETL(s, nlabel);
3104 STREAM_GETC(s, afi);
3105
3106 if (!(IS_VALID_AFI(afi))) {
3107 zlog_warn("Invalid AFI for VRF label: %u", afi);
3108 return;
3109 }
3110
3111 if (nlabel == zvrf->label[afi]) {
3112 /*
3113 * Nothing to do here move along
3114 */
3115 return;
3116 }
3117
3118 STREAM_GETC(s, ltype);
3119
3120 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
3121 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
3122 else
3123 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
3124
3125 if (!ifp) {
3126 zlog_debug("Unable to find specified Interface for %s",
3127 zvrf->vrf->name);
3128 return;
3129 }
3130
3131 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
3132
3133 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
3134 afi_t scrubber;
3135 bool really_remove;
3136
3137 really_remove = true;
3138 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
3139 if (scrubber == afi)
3140 continue;
3141
3142 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
3143 continue;
3144
3145 if (zvrf->label[afi] == zvrf->label[scrubber]) {
3146 really_remove = false;
3147 break;
3148 }
3149 }
3150
3151 if (really_remove)
3152 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
3153 NEXTHOP_TYPE_IFINDEX, NULL,
3154 ifp->ifindex, false /*backup*/);
3155 }
3156
3157 if (nlabel != MPLS_LABEL_NONE) {
3158 mpls_label_t out_label = MPLS_LABEL_IMPLICIT_NULL;
3159 mpls_lsp_install(def_zvrf, ltype, nlabel, 1, &out_label,
3160 NEXTHOP_TYPE_IFINDEX, NULL, ifp->ifindex);
3161 }
3162
3163 zvrf->label[afi] = nlabel;
3164 zvrf->label_proto[afi] = client->proto;
3165
3166 stream_failure:
3167 return;
3168 }
3169
3170 static inline void zread_rule(ZAPI_HANDLER_ARGS)
3171 {
3172 struct zebra_pbr_rule zpr;
3173 struct stream *s;
3174 uint32_t total, i;
3175 char ifname[INTERFACE_NAMSIZ + 1] = {};
3176
3177 s = msg;
3178 STREAM_GETL(s, total);
3179
3180 for (i = 0; i < total; i++) {
3181 memset(&zpr, 0, sizeof(zpr));
3182
3183 zpr.sock = client->sock;
3184 zpr.rule.vrf_id = hdr->vrf_id;
3185 STREAM_GETL(s, zpr.rule.seq);
3186 STREAM_GETL(s, zpr.rule.priority);
3187 STREAM_GETL(s, zpr.rule.unique);
3188 STREAM_GETC(s, zpr.rule.filter.ip_proto);
3189 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
3190 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
3191 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
3192 prefix_blen(&zpr.rule.filter.src_ip));
3193 STREAM_GETW(s, zpr.rule.filter.src_port);
3194 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
3195 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
3196 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
3197 prefix_blen(&zpr.rule.filter.dst_ip));
3198 STREAM_GETW(s, zpr.rule.filter.dst_port);
3199 STREAM_GETC(s, zpr.rule.filter.dsfield);
3200 STREAM_GETL(s, zpr.rule.filter.fwmark);
3201
3202 STREAM_GETL(s, zpr.rule.action.queue_id);
3203 STREAM_GETW(s, zpr.rule.action.vlan_id);
3204 STREAM_GETW(s, zpr.rule.action.vlan_flags);
3205 STREAM_GETW(s, zpr.rule.action.pcp);
3206
3207 STREAM_GETL(s, zpr.rule.action.table);
3208 STREAM_GET(ifname, s, INTERFACE_NAMSIZ);
3209
3210 strlcpy(zpr.ifname, ifname, sizeof(zpr.ifname));
3211 strlcpy(zpr.rule.ifname, ifname, sizeof(zpr.rule.ifname));
3212
3213 if (!is_default_prefix(&zpr.rule.filter.src_ip))
3214 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
3215
3216 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
3217 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
3218
3219 if (zpr.rule.filter.src_port)
3220 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
3221
3222 if (zpr.rule.filter.dst_port)
3223 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
3224
3225 if (zpr.rule.filter.dsfield)
3226 zpr.rule.filter.filter_bm |= PBR_FILTER_DSFIELD;
3227
3228 if (zpr.rule.filter.ip_proto)
3229 zpr.rule.filter.filter_bm |= PBR_FILTER_IP_PROTOCOL;
3230
3231 if (zpr.rule.filter.fwmark)
3232 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
3233
3234 if (!(zpr.rule.filter.src_ip.family == AF_INET
3235 || zpr.rule.filter.src_ip.family == AF_INET6)) {
3236 zlog_warn(
3237 "Unsupported PBR source IP family: %s (%hhu)",
3238 family2str(zpr.rule.filter.src_ip.family),
3239 zpr.rule.filter.src_ip.family);
3240 return;
3241 }
3242 if (!(zpr.rule.filter.dst_ip.family == AF_INET
3243 || zpr.rule.filter.dst_ip.family == AF_INET6)) {
3244 zlog_warn(
3245 "Unsupported PBR destination IP family: %s (%hhu)",
3246 family2str(zpr.rule.filter.dst_ip.family),
3247 zpr.rule.filter.dst_ip.family);
3248 return;
3249 }
3250
3251
3252 zpr.vrf_id = zvrf->vrf->vrf_id;
3253 if (hdr->command == ZEBRA_RULE_ADD)
3254 zebra_pbr_add_rule(&zpr);
3255 else
3256 zebra_pbr_del_rule(&zpr);
3257 }
3258
3259 stream_failure:
3260 return;
3261 }
3262
3263 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
3264 {
3265 struct zebra_pbr_ipset zpi;
3266 struct stream *s;
3267 uint32_t total, i;
3268
3269 s = msg;
3270 STREAM_GETL(s, total);
3271
3272 for (i = 0; i < total; i++) {
3273 memset(&zpi, 0, sizeof(zpi));
3274
3275 zpi.sock = client->sock;
3276 zpi.vrf_id = zvrf->vrf->vrf_id;
3277 STREAM_GETL(s, zpi.unique);
3278 STREAM_GETL(s, zpi.type);
3279 STREAM_GETC(s, zpi.family);
3280 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3281
3282 if (hdr->command == ZEBRA_IPSET_CREATE)
3283 zebra_pbr_create_ipset(&zpi);
3284 else
3285 zebra_pbr_destroy_ipset(&zpi);
3286 }
3287
3288 stream_failure:
3289 return;
3290 }
3291
3292 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
3293 {
3294 struct zebra_pbr_ipset_entry zpi;
3295 struct zebra_pbr_ipset ipset;
3296 struct stream *s;
3297 uint32_t total, i;
3298
3299 s = msg;
3300 STREAM_GETL(s, total);
3301
3302 for (i = 0; i < total; i++) {
3303 memset(&zpi, 0, sizeof(zpi));
3304 memset(&ipset, 0, sizeof(ipset));
3305
3306 zpi.sock = client->sock;
3307 STREAM_GETL(s, zpi.unique);
3308 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3309 ipset.ipset_name[ZEBRA_IPSET_NAME_SIZE - 1] = '\0';
3310 STREAM_GETC(s, zpi.src.family);
3311 STREAM_GETC(s, zpi.src.prefixlen);
3312 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
3313 STREAM_GETC(s, zpi.dst.family);
3314 STREAM_GETC(s, zpi.dst.prefixlen);
3315 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
3316
3317 STREAM_GETW(s, zpi.src_port_min);
3318 STREAM_GETW(s, zpi.src_port_max);
3319 STREAM_GETW(s, zpi.dst_port_min);
3320 STREAM_GETW(s, zpi.dst_port_max);
3321 STREAM_GETC(s, zpi.proto);
3322 if (!is_default_prefix(&zpi.src))
3323 zpi.filter_bm |= PBR_FILTER_SRC_IP;
3324
3325 if (!is_default_prefix(&zpi.dst))
3326 zpi.filter_bm |= PBR_FILTER_DST_IP;
3327 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
3328 zpi.filter_bm |= PBR_FILTER_DST_PORT;
3329 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
3330 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
3331 if (zpi.dst_port_max != 0)
3332 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
3333 if (zpi.src_port_max != 0)
3334 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
3335 if (zpi.proto != 0)
3336 zpi.filter_bm |= PBR_FILTER_PROTO;
3337
3338 if (!(zpi.dst.family == AF_INET
3339 || zpi.dst.family == AF_INET6)) {
3340 zlog_warn(
3341 "Unsupported PBR destination IP family: %s (%hhu)",
3342 family2str(zpi.dst.family), zpi.dst.family);
3343 goto stream_failure;
3344 }
3345 if (!(zpi.src.family == AF_INET
3346 || zpi.src.family == AF_INET6)) {
3347 zlog_warn(
3348 "Unsupported PBR source IP family: %s (%hhu)",
3349 family2str(zpi.src.family), zpi.src.family);
3350 goto stream_failure;
3351 }
3352
3353 /* calculate backpointer */
3354 zpi.backpointer =
3355 zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
3356
3357 if (!zpi.backpointer) {
3358 zlog_warn("ipset name specified: %s does not exist",
3359 ipset.ipset_name);
3360 goto stream_failure;
3361 }
3362
3363 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
3364 zebra_pbr_add_ipset_entry(&zpi);
3365 else
3366 zebra_pbr_del_ipset_entry(&zpi);
3367 }
3368
3369 stream_failure:
3370 return;
3371 }
3372
3373
3374 static inline void zebra_neigh_register(ZAPI_HANDLER_ARGS)
3375 {
3376 afi_t afi;
3377
3378 STREAM_GETW(msg, afi);
3379 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
3380 zlog_warn(
3381 "Invalid AFI %u while registering for neighbors notifications",
3382 afi);
3383 goto stream_failure;
3384 }
3385 vrf_bitmap_set(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
3386 stream_failure:
3387 return;
3388 }
3389
3390 static inline void zebra_neigh_unregister(ZAPI_HANDLER_ARGS)
3391 {
3392 afi_t afi;
3393
3394 STREAM_GETW(msg, afi);
3395 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
3396 zlog_warn(
3397 "Invalid AFI %u while unregistering from neighbor notifications",
3398 afi);
3399 goto stream_failure;
3400 }
3401 vrf_bitmap_unset(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
3402 stream_failure:
3403 return;
3404 }
3405
3406 static inline void zebra_gre_get(ZAPI_HANDLER_ARGS)
3407 {
3408 struct stream *s;
3409 ifindex_t idx;
3410 struct interface *ifp;
3411 struct zebra_if *zebra_if = NULL;
3412 struct zebra_l2info_gre *gre_info;
3413 struct interface *ifp_link = NULL;
3414 vrf_id_t vrf_id_link = VRF_UNKNOWN;
3415 vrf_id_t vrf_id = zvrf->vrf->vrf_id;
3416
3417 s = msg;
3418 STREAM_GETL(s, idx);
3419 ifp = if_lookup_by_index(idx, vrf_id);
3420
3421 if (ifp)
3422 zebra_if = ifp->info;
3423
3424 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
3425
3426 zclient_create_header(s, ZEBRA_GRE_UPDATE, vrf_id);
3427
3428 if (ifp && IS_ZEBRA_IF_GRE(ifp) && zebra_if) {
3429 gre_info = &zebra_if->l2info.gre;
3430
3431 stream_putl(s, idx);
3432 stream_putl(s, gre_info->ikey);
3433 stream_putl(s, gre_info->ikey);
3434 stream_putl(s, gre_info->ifindex_link);
3435
3436 ifp_link = if_lookup_by_index_per_ns(
3437 zebra_ns_lookup(gre_info->link_nsid),
3438 gre_info->ifindex_link);
3439 if (ifp_link)
3440 vrf_id_link = ifp_link->vrf->vrf_id;
3441 stream_putl(s, vrf_id_link);
3442 stream_putl(s, gre_info->vtep_ip.s_addr);
3443 stream_putl(s, gre_info->vtep_ip_remote.s_addr);
3444 } else {
3445 stream_putl(s, idx);
3446 stream_putl(s, 0);
3447 stream_putl(s, 0);
3448 stream_putl(s, IFINDEX_INTERNAL);
3449 stream_putl(s, VRF_UNKNOWN);
3450 stream_putl(s, 0);
3451 stream_putl(s, 0);
3452 }
3453 /* Write packet size. */
3454 stream_putw_at(s, 0, stream_get_endp(s));
3455 zserv_send_message(client, s);
3456
3457 return;
3458 stream_failure:
3459 return;
3460 }
3461
3462 static inline void zebra_configure_arp(ZAPI_HANDLER_ARGS)
3463 {
3464 struct stream *s;
3465 uint8_t fam;
3466 ifindex_t idx;
3467 struct interface *ifp;
3468
3469 s = msg;
3470 STREAM_GETC(s, fam);
3471 if (fam != AF_INET && fam != AF_INET6)
3472 return;
3473 STREAM_GETL(s, idx);
3474 ifp = if_lookup_by_index_per_ns(zvrf->zns, idx);
3475 if (!ifp)
3476 return;
3477 dplane_neigh_table_update(ifp, fam, 1, 0, 0);
3478 stream_failure:
3479 return;
3480 }
3481
3482 static inline void zebra_neigh_ip_add(ZAPI_HANDLER_ARGS)
3483 {
3484 struct stream *s;
3485 struct zapi_neigh_ip api = {};
3486 int ret;
3487 const struct interface *ifp;
3488
3489 s = msg;
3490 ret = zclient_neigh_ip_decode(s, &api);
3491 if (ret < 0)
3492 return;
3493 ifp = if_lookup_by_index(api.index, zvrf_id(zvrf));
3494 if (!ifp)
3495 return;
3496 dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_INSTALL, ifp, &api.ip_out,
3497 &api.ip_in, api.ndm_state, client->proto);
3498 }
3499
3500
3501 static inline void zebra_neigh_ip_del(ZAPI_HANDLER_ARGS)
3502 {
3503 struct stream *s;
3504 struct zapi_neigh_ip api = {};
3505 int ret;
3506 struct interface *ifp;
3507
3508 s = msg;
3509 ret = zclient_neigh_ip_decode(s, &api);
3510 if (ret < 0)
3511 return;
3512 ifp = if_lookup_by_index(api.index, zvrf_id(zvrf));
3513 if (!ifp)
3514 return;
3515 dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_DELETE, ifp, &api.ip_out,
3516 &api.ip_in, api.ndm_state, client->proto);
3517 }
3518
3519
3520 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
3521 {
3522 struct zebra_pbr_iptable *zpi =
3523 XCALLOC(MTYPE_TMP, sizeof(struct zebra_pbr_iptable));
3524 struct stream *s;
3525
3526 s = msg;
3527
3528 zpi->interface_name_list = list_new();
3529 zpi->sock = client->sock;
3530 zpi->vrf_id = zvrf->vrf->vrf_id;
3531 STREAM_GETL(s, zpi->unique);
3532 STREAM_GETL(s, zpi->type);
3533 STREAM_GETL(s, zpi->filter_bm);
3534 STREAM_GETL(s, zpi->action);
3535 STREAM_GETL(s, zpi->fwmark);
3536 STREAM_GET(&zpi->ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3537 STREAM_GETC(s, zpi->family);
3538 STREAM_GETW(s, zpi->pkt_len_min);
3539 STREAM_GETW(s, zpi->pkt_len_max);
3540 STREAM_GETW(s, zpi->tcp_flags);
3541 STREAM_GETW(s, zpi->tcp_mask_flags);
3542 STREAM_GETC(s, zpi->dscp_value);
3543 STREAM_GETC(s, zpi->fragment);
3544 STREAM_GETC(s, zpi->protocol);
3545 STREAM_GETW(s, zpi->flow_label);
3546 STREAM_GETL(s, zpi->nb_interface);
3547 zebra_pbr_iptable_update_interfacelist(s, zpi);
3548
3549 if (hdr->command == ZEBRA_IPTABLE_ADD)
3550 zebra_pbr_add_iptable(zpi);
3551 else
3552 zebra_pbr_del_iptable(zpi);
3553
3554 stream_failure:
3555 zebra_pbr_iptable_free(zpi);
3556 zpi = NULL;
3557 return;
3558 }
3559
3560 static inline void zread_neigh_discover(ZAPI_HANDLER_ARGS)
3561 {
3562 struct stream *s;
3563 ifindex_t ifindex;
3564 struct interface *ifp;
3565 struct prefix p;
3566 struct ipaddr ip;
3567
3568 s = msg;
3569
3570 STREAM_GETL(s, ifindex);
3571
3572 ifp = if_lookup_by_index_per_ns(zvrf->zns, ifindex);
3573 if (!ifp) {
3574 zlog_debug("Failed to lookup ifindex: %u", ifindex);
3575 return;
3576 }
3577
3578 STREAM_GETC(s, p.family);
3579 STREAM_GETC(s, p.prefixlen);
3580 STREAM_GET(&p.u.prefix, s, prefix_blen(&p));
3581
3582 if (p.family == AF_INET)
3583 SET_IPADDR_V4(&ip);
3584 else
3585 SET_IPADDR_V6(&ip);
3586
3587 memcpy(&ip.ip.addr, &p.u.prefix, prefix_blen(&p));
3588
3589 dplane_neigh_discover(ifp, &ip);
3590
3591 stream_failure:
3592 return;
3593 }
3594
3595 static inline void zebra_gre_source_set(ZAPI_HANDLER_ARGS)
3596 {
3597 struct stream *s;
3598 ifindex_t idx, link_idx;
3599 vrf_id_t link_vrf_id;
3600 struct interface *ifp;
3601 struct interface *ifp_link;
3602 vrf_id_t vrf_id = zvrf->vrf->vrf_id;
3603 struct zebra_if *zif, *gre_zif;
3604 struct zebra_l2info_gre *gre_info;
3605 unsigned int mtu;
3606
3607 s = msg;
3608 STREAM_GETL(s, idx);
3609 ifp = if_lookup_by_index(idx, vrf_id);
3610 STREAM_GETL(s, link_idx);
3611 STREAM_GETL(s, link_vrf_id);
3612 STREAM_GETL(s, mtu);
3613
3614 ifp_link = if_lookup_by_index(link_idx, link_vrf_id);
3615 if (!ifp_link || !ifp) {
3616 zlog_warn("GRE (index %u, VRF %u) or GRE link interface (index %u, VRF %u) not found, when setting GRE params",
3617 idx, vrf_id, link_idx, link_vrf_id);
3618 return;
3619 }
3620
3621 if (!IS_ZEBRA_IF_GRE(ifp))
3622 return;
3623
3624 gre_zif = (struct zebra_if *)ifp->info;
3625 zif = (struct zebra_if *)ifp_link->info;
3626 if (!zif || !gre_zif)
3627 return;
3628
3629 gre_info = &zif->l2info.gre;
3630 if (!gre_info)
3631 return;
3632
3633 if (!mtu)
3634 mtu = ifp->mtu;
3635
3636 /* if gre link already set or mtu did not change, do not set it */
3637 if (gre_zif->link && gre_zif->link == ifp_link && mtu == ifp->mtu)
3638 return;
3639
3640 dplane_gre_set(ifp, ifp_link, mtu, gre_info);
3641
3642 stream_failure:
3643 return;
3644 }
3645
3646 static void zsend_error_msg(struct zserv *client, enum zebra_error_types error,
3647 struct zmsghdr *bad_hdr)
3648 {
3649
3650 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
3651
3652 zclient_create_header(s, ZEBRA_ERROR, bad_hdr->vrf_id);
3653
3654 zserv_encode_error(s, error);
3655
3656 client->error_cnt++;
3657 zserv_send_message(client, s);
3658 }
3659
3660 static void zserv_error_no_vrf(ZAPI_HANDLER_ARGS)
3661 {
3662 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
3663 zlog_debug("ZAPI message specifies unknown VRF: %d",
3664 hdr->vrf_id);
3665
3666 zsend_error_msg(client, ZEBRA_NO_VRF, hdr);
3667 }
3668
3669 static void zserv_error_invalid_msg_type(ZAPI_HANDLER_ARGS)
3670 {
3671 zlog_info("Zebra received unknown command %d", hdr->command);
3672
3673 zsend_error_msg(client, ZEBRA_INVALID_MSG_TYPE, hdr);
3674 }
3675
3676 void (*const zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
3677 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
3678 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
3679 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
3680 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
3681 [ZEBRA_INTERFACE_SET_PROTODOWN] = zread_interface_set_protodown,
3682 [ZEBRA_ROUTE_ADD] = zread_route_add,
3683 [ZEBRA_ROUTE_DELETE] = zread_route_del,
3684 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
3685 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
3686 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
3687 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
3688 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
3689 [ZEBRA_HELLO] = zread_hello,
3690 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
3691 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
3692 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
3693 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
3694 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
3695 #if HAVE_BFDD > 0
3696 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
3697 #endif /* HAVE_BFDD */
3698 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
3699 [ZEBRA_VRF_LABEL] = zread_vrf_label,
3700 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
3701 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
3702 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
3703 [ZEBRA_SR_POLICY_SET] = zread_sr_policy_set,
3704 [ZEBRA_SR_POLICY_DELETE] = zread_sr_policy_delete,
3705 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels_add,
3706 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels_delete,
3707 [ZEBRA_MPLS_LABELS_REPLACE] = zread_mpls_labels_replace,
3708 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
3709 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
3710 [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request,
3711 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
3712 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
3713 [ZEBRA_FEC_REGISTER] = zread_fec_register,
3714 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
3715 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
3716 [ZEBRA_ADVERTISE_SVI_MACIP] = zebra_vxlan_advertise_svi_macip,
3717 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
3718 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
3719 [ZEBRA_REMOTE_ES_VTEP_ADD] = zebra_evpn_proc_remote_es,
3720 [ZEBRA_REMOTE_ES_VTEP_DEL] = zebra_evpn_proc_remote_es,
3721 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add_zapi,
3722 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del_zapi,
3723 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
3724 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
3725 [ZEBRA_DUPLICATE_ADDR_DETECTION] = zebra_vxlan_dup_addr_detection,
3726 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
3727 [ZEBRA_PW_ADD] = zread_pseudowire,
3728 [ZEBRA_PW_DELETE] = zread_pseudowire,
3729 [ZEBRA_PW_SET] = zread_pseudowire,
3730 [ZEBRA_PW_UNSET] = zread_pseudowire,
3731 [ZEBRA_RULE_ADD] = zread_rule,
3732 [ZEBRA_RULE_DELETE] = zread_rule,
3733 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
3734 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
3735 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
3736 [ZEBRA_IPSET_CREATE] = zread_ipset,
3737 [ZEBRA_IPSET_DESTROY] = zread_ipset,
3738 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
3739 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
3740 [ZEBRA_IPTABLE_ADD] = zread_iptable,
3741 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
3742 [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control,
3743 [ZEBRA_VXLAN_SG_REPLAY] = zebra_vxlan_sg_replay,
3744 [ZEBRA_MLAG_CLIENT_REGISTER] = zebra_mlag_client_register,
3745 [ZEBRA_MLAG_CLIENT_UNREGISTER] = zebra_mlag_client_unregister,
3746 [ZEBRA_MLAG_FORWARD_MSG] = zebra_mlag_forward_client_msg,
3747 [ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK] = zread_srv6_manager_request,
3748 [ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK] = zread_srv6_manager_request,
3749 [ZEBRA_CLIENT_CAPABILITIES] = zread_client_capabilities,
3750 [ZEBRA_NEIGH_DISCOVER] = zread_neigh_discover,
3751 [ZEBRA_NHG_ADD] = zread_nhg_add,
3752 [ZEBRA_NHG_DEL] = zread_nhg_del,
3753 [ZEBRA_ROUTE_NOTIFY_REQUEST] = zread_route_notify_request,
3754 [ZEBRA_EVPN_REMOTE_NH_ADD] = zebra_evpn_proc_remote_nh,
3755 [ZEBRA_EVPN_REMOTE_NH_DEL] = zebra_evpn_proc_remote_nh,
3756 [ZEBRA_NEIGH_IP_ADD] = zebra_neigh_ip_add,
3757 [ZEBRA_NEIGH_IP_DEL] = zebra_neigh_ip_del,
3758 [ZEBRA_NHRP_NEIGH_REGISTER] = zebra_neigh_register,
3759 [ZEBRA_NHRP_NEIGH_UNREGISTER] = zebra_neigh_unregister,
3760 [ZEBRA_CONFIGURE_ARP] = zebra_configure_arp,
3761 [ZEBRA_GRE_GET] = zebra_gre_get,
3762 [ZEBRA_GRE_SOURCE_SET] = zebra_gre_source_set,
3763 };
3764
3765 /*
3766 * Process a batch of zapi messages.
3767 */
3768 void zserv_handle_commands(struct zserv *client, struct stream_fifo *fifo)
3769 {
3770 struct zmsghdr hdr;
3771 struct zebra_vrf *zvrf;
3772 struct stream *msg;
3773 struct stream_fifo temp_fifo;
3774
3775 stream_fifo_init(&temp_fifo);
3776
3777 while (stream_fifo_head(fifo)) {
3778 msg = stream_fifo_pop(fifo);
3779
3780 if (STREAM_READABLE(msg) > ZEBRA_MAX_PACKET_SIZ) {
3781 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
3782 zlog_debug(
3783 "ZAPI message is %zu bytes long but the maximum packet size is %u; dropping",
3784 STREAM_READABLE(msg),
3785 ZEBRA_MAX_PACKET_SIZ);
3786 goto continue_loop;
3787 }
3788
3789 zapi_parse_header(msg, &hdr);
3790
3791 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV
3792 && IS_ZEBRA_DEBUG_DETAIL)
3793 zserv_log_message(NULL, msg, &hdr);
3794
3795 hdr.length -= ZEBRA_HEADER_SIZE;
3796
3797 /* Before checking for a handler function, check for
3798 * special messages that are handled in another module;
3799 * we'll treat these as opaque.
3800 */
3801 if (zebra_opaque_handles_msgid(hdr.command)) {
3802 /* Reset message buffer */
3803 stream_set_getp(msg, 0);
3804
3805 stream_fifo_push(&temp_fifo, msg);
3806
3807 /* Continue without freeing the message */
3808 msg = NULL;
3809 goto continue_loop;
3810 }
3811
3812 /* lookup vrf */
3813 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
3814 if (!zvrf) {
3815 zserv_error_no_vrf(client, &hdr, msg, zvrf);
3816 goto continue_loop;
3817 }
3818
3819 if (hdr.command >= array_size(zserv_handlers)
3820 || zserv_handlers[hdr.command] == NULL) {
3821 zserv_error_invalid_msg_type(client, &hdr, msg, zvrf);
3822 goto continue_loop;
3823 }
3824
3825 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
3826
3827 continue_loop:
3828 stream_free(msg);
3829 }
3830
3831 /* Dispatch any special messages from the temp fifo */
3832 if (stream_fifo_head(&temp_fifo) != NULL)
3833 zebra_opaque_enqueue_batch(&temp_fifo);
3834
3835 stream_fifo_deinit(&temp_fifo);
3836 }
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