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Merge pull request #10293 from rgirada/ospf_lsid
[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), &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
1491 STREAM_GETL(msg, ifindex);
1492 STREAM_GETC(msg, down);
1493
1494 /* set ifdown */
1495 ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), ifindex);
1496
1497 if (ifp) {
1498 zlog_info("Setting interface %s (%u): protodown %s", ifp->name,
1499 ifindex, down ? "on" : "off");
1500 zebra_if_set_protodown(ifp, down);
1501 } else {
1502 zlog_warn(
1503 "Cannot set protodown %s for interface %u; does not exist",
1504 down ? "on" : "off", ifindex);
1505 }
1506
1507
1508 stream_failure:
1509 return;
1510 }
1511
1512 bool zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1513 const unsigned int nexthop_num)
1514 {
1515 if (nexthop_num > zrouter.multipath_num) {
1516 char buff[PREFIX2STR_BUFFER];
1517
1518 if (p)
1519 prefix2str(p, buff, sizeof(buff));
1520
1521 flog_warn(
1522 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1523 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1524 caller, (p ? buff : "(NULL)"), nexthop_num,
1525 zrouter.multipath_num);
1526 return true;
1527 }
1528
1529 return false;
1530 }
1531
1532 /*
1533 * Create a new nexthop based on a zapi nexthop.
1534 */
1535 static struct nexthop *nexthop_from_zapi(const struct zapi_nexthop *api_nh,
1536 uint32_t flags, struct prefix *p,
1537 uint16_t backup_nexthop_num)
1538 {
1539 struct nexthop *nexthop = NULL;
1540 struct ipaddr vtep_ip;
1541 struct interface *ifp;
1542 int i;
1543 char nhbuf[INET6_ADDRSTRLEN] = "";
1544
1545 switch (api_nh->type) {
1546 case NEXTHOP_TYPE_IFINDEX:
1547 nexthop = nexthop_from_ifindex(api_nh->ifindex, api_nh->vrf_id);
1548 break;
1549 case NEXTHOP_TYPE_IPV4:
1550 if (IS_ZEBRA_DEBUG_RECV) {
1551 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1552 sizeof(nhbuf));
1553 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1554 nhbuf, api_nh->vrf_id);
1555 }
1556 nexthop = nexthop_from_ipv4(&api_nh->gate.ipv4, NULL,
1557 api_nh->vrf_id);
1558 break;
1559 case NEXTHOP_TYPE_IPV4_IFINDEX:
1560 if (IS_ZEBRA_DEBUG_RECV) {
1561 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1562 sizeof(nhbuf));
1563 zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d",
1564 __func__, nhbuf, api_nh->vrf_id,
1565 api_nh->ifindex);
1566 }
1567
1568 nexthop = nexthop_from_ipv4_ifindex(
1569 &api_nh->gate.ipv4, NULL, api_nh->ifindex,
1570 api_nh->vrf_id);
1571
1572 /* Special handling for IPv4 routes sourced from EVPN:
1573 * the nexthop and associated MAC need to be installed.
1574 */
1575 if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1576 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1577 vtep_ip.ipa_type = IPADDR_V4;
1578 memcpy(&(vtep_ip.ipaddr_v4), &(api_nh->gate.ipv4),
1579 sizeof(struct in_addr));
1580 zebra_rib_queue_evpn_route_add(
1581 api_nh->vrf_id, &api_nh->rmac, &vtep_ip, p);
1582 }
1583 break;
1584 case NEXTHOP_TYPE_IPV6:
1585 if (IS_ZEBRA_DEBUG_RECV) {
1586 inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf,
1587 sizeof(nhbuf));
1588 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1589 nhbuf, api_nh->vrf_id);
1590 }
1591 nexthop = nexthop_from_ipv6(&api_nh->gate.ipv6, api_nh->vrf_id);
1592 break;
1593 case NEXTHOP_TYPE_IPV6_IFINDEX:
1594 if (IS_ZEBRA_DEBUG_RECV) {
1595 inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf,
1596 sizeof(nhbuf));
1597 zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d",
1598 __func__, nhbuf, api_nh->vrf_id,
1599 api_nh->ifindex);
1600 }
1601 nexthop = nexthop_from_ipv6_ifindex(&api_nh->gate.ipv6,
1602 api_nh->ifindex,
1603 api_nh->vrf_id);
1604
1605 /* Special handling for IPv6 routes sourced from EVPN:
1606 * the nexthop and associated MAC need to be installed.
1607 */
1608 if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1609 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1610 vtep_ip.ipa_type = IPADDR_V6;
1611 memcpy(&vtep_ip.ipaddr_v6, &(api_nh->gate.ipv6),
1612 sizeof(struct in6_addr));
1613 zebra_rib_queue_evpn_route_add(
1614 api_nh->vrf_id, &api_nh->rmac, &vtep_ip, p);
1615 }
1616 break;
1617 case NEXTHOP_TYPE_BLACKHOLE:
1618 if (IS_ZEBRA_DEBUG_RECV)
1619 zlog_debug("%s: nh blackhole %d",
1620 __func__, api_nh->bh_type);
1621
1622 nexthop =
1623 nexthop_from_blackhole(api_nh->bh_type, api_nh->vrf_id);
1624 break;
1625 }
1626
1627 /* Return early if we couldn't process the zapi nexthop */
1628 if (nexthop == NULL) {
1629 goto done;
1630 }
1631
1632 /* Mark nexthop as onlink either if client has explicitly told us
1633 * to or if the nexthop is on an 'unnumbered' interface.
1634 */
1635 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK))
1636 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1637 else if (api_nh->type == NEXTHOP_TYPE_IPV4_IFINDEX) {
1638 ifp = if_lookup_by_index(api_nh->ifindex, api_nh->vrf_id);
1639 if (ifp && connected_is_unnumbered(ifp))
1640 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1641 }
1642
1643 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_WEIGHT))
1644 nexthop->weight = api_nh->weight;
1645
1646 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP)) {
1647 /* Validate count */
1648 if (api_nh->backup_num > NEXTHOP_MAX_BACKUPS) {
1649 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
1650 zlog_debug("%s: invalid backup nh count %d",
1651 __func__, api_nh->backup_num);
1652 nexthop_free(nexthop);
1653 nexthop = NULL;
1654 goto done;
1655 }
1656
1657 /* Copy backup info */
1658 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP);
1659 nexthop->backup_num = api_nh->backup_num;
1660
1661 for (i = 0; i < api_nh->backup_num; i++) {
1662 /* Validate backup index */
1663 if (api_nh->backup_idx[i] < backup_nexthop_num) {
1664 nexthop->backup_idx[i] = api_nh->backup_idx[i];
1665 } else {
1666 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
1667 zlog_debug("%s: invalid backup nh idx %d",
1668 __func__,
1669 api_nh->backup_idx[i]);
1670 nexthop_free(nexthop);
1671 nexthop = NULL;
1672 goto done;
1673 }
1674 }
1675 }
1676
1677 done:
1678 return nexthop;
1679 }
1680
1681 static bool zapi_read_nexthops(struct zserv *client, struct prefix *p,
1682 struct zapi_nexthop *nhops, uint32_t flags,
1683 uint32_t message, uint16_t nexthop_num,
1684 uint16_t backup_nh_num,
1685 struct nexthop_group **png,
1686 struct nhg_backup_info **pbnhg)
1687 {
1688 struct nexthop_group *ng = NULL;
1689 struct nhg_backup_info *bnhg = NULL;
1690 uint16_t i;
1691 struct nexthop *last_nh = NULL;
1692
1693 assert(!(png && pbnhg));
1694
1695 if (png)
1696 ng = nexthop_group_new();
1697
1698 if (pbnhg && backup_nh_num > 0) {
1699 if (IS_ZEBRA_DEBUG_RECV)
1700 zlog_debug("%s: adding %d backup nexthops", __func__,
1701 backup_nh_num);
1702
1703 bnhg = zebra_nhg_backup_alloc();
1704 }
1705
1706 /*
1707 * TBD should _all_ of the nexthop add operations use
1708 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1709 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1710 */
1711 for (i = 0; i < nexthop_num; i++) {
1712 struct nexthop *nexthop;
1713 enum lsp_types_t label_type;
1714 char nhbuf[NEXTHOP_STRLEN];
1715 char labelbuf[MPLS_LABEL_STRLEN];
1716 struct zapi_nexthop *api_nh = &nhops[i];
1717
1718 /* Convert zapi nexthop */
1719 nexthop = nexthop_from_zapi(api_nh, flags, p, backup_nh_num);
1720 if (!nexthop) {
1721 flog_warn(
1722 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1723 "%s: Nexthops Specified: %u(%u) but we failed to properly create one",
1724 __func__, nexthop_num, i);
1725 if (ng)
1726 nexthop_group_delete(&ng);
1727 if (bnhg)
1728 zebra_nhg_backup_free(&bnhg);
1729 return false;
1730 }
1731
1732 if (bnhg
1733 && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) {
1734 if (IS_ZEBRA_DEBUG_RECV) {
1735 nexthop2str(nexthop, nhbuf, sizeof(nhbuf));
1736 zlog_debug("%s: backup nh %s with BACKUP flag!",
1737 __func__, nhbuf);
1738 }
1739 UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP);
1740 nexthop->backup_num = 0;
1741 }
1742
1743 if (CHECK_FLAG(message, ZAPI_MESSAGE_SRTE)) {
1744 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_SRTE);
1745 nexthop->srte_color = api_nh->srte_color;
1746 }
1747
1748 /* MPLS labels for BGP-LU or Segment Routing */
1749 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_LABEL)
1750 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1751 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE
1752 && api_nh->label_num > 0) {
1753
1754 label_type = lsp_type_from_re_type(client->proto);
1755 nexthop_add_labels(nexthop, label_type,
1756 api_nh->label_num,
1757 &api_nh->labels[0]);
1758 }
1759
1760 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6LOCAL)
1761 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1762 if (IS_ZEBRA_DEBUG_RECV)
1763 zlog_debug("%s: adding seg6local action %s",
1764 __func__,
1765 seg6local_action2str(
1766 api_nh->seg6local_action));
1767
1768 nexthop_add_srv6_seg6local(nexthop,
1769 api_nh->seg6local_action,
1770 &api_nh->seg6local_ctx);
1771 }
1772
1773 if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6)
1774 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1775 if (IS_ZEBRA_DEBUG_RECV)
1776 zlog_debug("%s: adding seg6", __func__);
1777
1778 nexthop_add_srv6_seg6(nexthop, &api_nh->seg6_segs);
1779 }
1780
1781 if (IS_ZEBRA_DEBUG_RECV) {
1782 labelbuf[0] = '\0';
1783 nhbuf[0] = '\0';
1784
1785 nexthop2str(nexthop, nhbuf, sizeof(nhbuf));
1786
1787 if (nexthop->nh_label &&
1788 nexthop->nh_label->num_labels > 0) {
1789 mpls_label2str(nexthop->nh_label->num_labels,
1790 nexthop->nh_label->label,
1791 labelbuf, sizeof(labelbuf),
1792 false);
1793 }
1794
1795 zlog_debug("%s: nh=%s, vrf_id=%d %s",
1796 __func__, nhbuf, api_nh->vrf_id, labelbuf);
1797 }
1798
1799 if (ng) {
1800 /* Add new nexthop to temporary list. This list is
1801 * canonicalized - sorted - so that it can be hashed
1802 * later in route processing. We expect that the sender
1803 * has sent the list sorted, and the zapi client api
1804 * attempts to enforce that, so this should be
1805 * inexpensive - but it is necessary to support shared
1806 * nexthop-groups.
1807 */
1808 nexthop_group_add_sorted(ng, nexthop);
1809 }
1810 if (bnhg) {
1811 /* Note that the order of the backup nexthops is
1812 * significant, so we don't sort this list as we do the
1813 * primary nexthops, we just append.
1814 */
1815 if (last_nh)
1816 NEXTHOP_APPEND(last_nh, nexthop);
1817 else
1818 bnhg->nhe->nhg.nexthop = nexthop;
1819
1820 last_nh = nexthop;
1821 }
1822 }
1823
1824
1825 /* succesfully read, set caller pointers now */
1826 if (png)
1827 *png = ng;
1828
1829 if (pbnhg)
1830 *pbnhg = bnhg;
1831
1832 return true;
1833 }
1834
1835 static int zapi_nhg_decode(struct stream *s, int cmd, struct zapi_nhg *api_nhg)
1836 {
1837 uint16_t i;
1838 struct zapi_nexthop *znh;
1839
1840 STREAM_GETW(s, api_nhg->proto);
1841 STREAM_GETL(s, api_nhg->id);
1842
1843 if (cmd == ZEBRA_NHG_DEL)
1844 goto done;
1845
1846 /* Nexthops */
1847 STREAM_GETW(s, api_nhg->nexthop_num);
1848
1849 if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->nexthop_num))
1850 return -1;
1851
1852 if (api_nhg->nexthop_num <= 0) {
1853 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1854 "%s: No nexthops sent", __func__);
1855 return -1;
1856 }
1857
1858 for (i = 0; i < api_nhg->nexthop_num; i++) {
1859 znh = &((api_nhg->nexthops)[i]);
1860
1861 if (zapi_nexthop_decode(s, znh, 0, 0) != 0) {
1862 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1863 "%s: Nexthop creation failed", __func__);
1864 return -1;
1865 }
1866 }
1867
1868 /* Backup Nexthops */
1869 STREAM_GETW(s, api_nhg->backup_nexthop_num);
1870
1871 if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->backup_nexthop_num))
1872 return -1;
1873
1874 for (i = 0; i < api_nhg->backup_nexthop_num; i++) {
1875 znh = &((api_nhg->backup_nexthops)[i]);
1876
1877 if (zapi_nexthop_decode(s, znh, 0, 0) != 0) {
1878 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1879 "%s: Backup Nexthop creation failed",
1880 __func__);
1881 return -1;
1882 }
1883 }
1884
1885 done:
1886 return 0;
1887
1888 stream_failure:
1889 flog_warn(
1890 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1891 "%s: Nexthop Group decode failed with some sort of stream read failure",
1892 __func__);
1893 return -1;
1894 }
1895
1896 static void zread_nhg_del(ZAPI_HANDLER_ARGS)
1897 {
1898 struct stream *s;
1899 struct zapi_nhg api_nhg = {};
1900 struct nhg_hash_entry *nhe;
1901
1902 s = msg;
1903 if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) {
1904 if (IS_ZEBRA_DEBUG_RECV)
1905 zlog_debug("%s: Unable to decode zapi_nhg sent",
1906 __func__);
1907 return;
1908 }
1909
1910 /*
1911 * Delete the received nhg id
1912 */
1913 nhe = zebra_nhg_proto_del(api_nhg.id, api_nhg.proto);
1914
1915 if (nhe) {
1916 zebra_nhg_decrement_ref(nhe);
1917 zsend_nhg_notify(api_nhg.proto, client->instance,
1918 client->session_id, api_nhg.id,
1919 ZAPI_NHG_REMOVED);
1920 } else
1921 zsend_nhg_notify(api_nhg.proto, client->instance,
1922 client->session_id, api_nhg.id,
1923 ZAPI_NHG_REMOVE_FAIL);
1924 }
1925
1926 static void zread_nhg_add(ZAPI_HANDLER_ARGS)
1927 {
1928 struct stream *s;
1929 struct zapi_nhg api_nhg = {};
1930 struct nexthop_group *nhg = NULL;
1931 struct nhg_backup_info *bnhg = NULL;
1932 struct nhg_hash_entry *nhe;
1933
1934 s = msg;
1935 if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) {
1936 if (IS_ZEBRA_DEBUG_RECV)
1937 zlog_debug("%s: Unable to decode zapi_nhg sent",
1938 __func__);
1939 return;
1940 }
1941
1942 if ((!zapi_read_nexthops(client, NULL, api_nhg.nexthops, 0, 0,
1943 api_nhg.nexthop_num,
1944 api_nhg.backup_nexthop_num, &nhg, NULL))
1945 || (!zapi_read_nexthops(client, NULL, api_nhg.backup_nexthops, 0, 0,
1946 api_nhg.backup_nexthop_num,
1947 api_nhg.backup_nexthop_num, NULL, &bnhg))) {
1948
1949 flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1950 "%s: Nexthop Group Creation failed", __func__);
1951
1952 /* Free any local allocations */
1953 nexthop_group_delete(&nhg);
1954 zebra_nhg_backup_free(&bnhg);
1955
1956 return;
1957 }
1958
1959 /* Create a temporary nhe */
1960 nhe = zebra_nhg_alloc();
1961 nhe->id = api_nhg.id;
1962 nhe->type = api_nhg.proto;
1963 nhe->zapi_instance = client->instance;
1964 nhe->zapi_session = client->session_id;
1965
1966 /* Take over the list(s) of nexthops */
1967 nhe->nhg.nexthop = nhg->nexthop;
1968 nhg->nexthop = NULL;
1969
1970 if (bnhg) {
1971 nhe->backup_info = bnhg;
1972 bnhg = NULL;
1973 }
1974
1975 /*
1976 * TODO:
1977 * Assume fully resolved for now and install.
1978 * Resolution is going to need some more work.
1979 */
1980
1981 /* Enqueue to workqueue for processing */
1982 rib_queue_nhe_add(nhe);
1983
1984 /* Free any local allocations */
1985 nexthop_group_delete(&nhg);
1986 zebra_nhg_backup_free(&bnhg);
1987
1988 }
1989
1990 static void zread_route_add(ZAPI_HANDLER_ARGS)
1991 {
1992 struct stream *s;
1993 struct zapi_route api;
1994 afi_t afi;
1995 struct prefix_ipv6 *src_p = NULL;
1996 struct route_entry *re;
1997 struct nexthop_group *ng = NULL;
1998 struct nhg_backup_info *bnhg = NULL;
1999 int ret;
2000 vrf_id_t vrf_id;
2001 struct nhg_hash_entry nhe;
2002
2003 s = msg;
2004 if (zapi_route_decode(s, &api) < 0) {
2005 if (IS_ZEBRA_DEBUG_RECV)
2006 zlog_debug("%s: Unable to decode zapi_route sent",
2007 __func__);
2008 return;
2009 }
2010
2011 vrf_id = zvrf_id(zvrf);
2012
2013 if (IS_ZEBRA_DEBUG_RECV)
2014 zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x",
2015 __func__, vrf_id, api.tableid, &api.prefix,
2016 (int)api.message, api.flags);
2017
2018 /* Allocate new route. */
2019 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
2020 re->type = api.type;
2021 re->instance = api.instance;
2022 re->flags = api.flags;
2023 re->uptime = monotime(NULL);
2024 re->vrf_id = vrf_id;
2025
2026 if (api.tableid)
2027 re->table = api.tableid;
2028 else
2029 re->table = zvrf->table_id;
2030
2031 if (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NHG)
2032 && (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)
2033 || api.nexthop_num == 0)) {
2034 flog_warn(
2035 EC_ZEBRA_RX_ROUTE_NO_NEXTHOPS,
2036 "%s: received a route without nexthops for prefix %pFX from client %s",
2037 __func__, &api.prefix,
2038 zebra_route_string(client->proto));
2039
2040 XFREE(MTYPE_RE, re);
2041 return;
2042 }
2043
2044 /* Report misuse of the backup flag */
2045 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS)
2046 && api.backup_nexthop_num == 0) {
2047 if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT)
2048 zlog_debug(
2049 "%s: client %s: BACKUP flag set but no backup nexthops, prefix %pFX",
2050 __func__, zebra_route_string(client->proto),
2051 &api.prefix);
2052 }
2053
2054 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NHG))
2055 re->nhe_id = api.nhgid;
2056
2057 if (!re->nhe_id
2058 && (!zapi_read_nexthops(client, &api.prefix, api.nexthops,
2059 api.flags, api.message, api.nexthop_num,
2060 api.backup_nexthop_num, &ng, NULL)
2061 || !zapi_read_nexthops(client, &api.prefix, api.backup_nexthops,
2062 api.flags, api.message,
2063 api.backup_nexthop_num,
2064 api.backup_nexthop_num, NULL, &bnhg))) {
2065
2066 nexthop_group_delete(&ng);
2067 zebra_nhg_backup_free(&bnhg);
2068 XFREE(MTYPE_RE, re);
2069 return;
2070 }
2071
2072 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
2073 re->distance = api.distance;
2074 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
2075 re->metric = api.metric;
2076 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
2077 re->tag = api.tag;
2078 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
2079 re->mtu = api.mtu;
2080
2081 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_OPAQUE)) {
2082 re->opaque =
2083 XMALLOC(MTYPE_RE_OPAQUE,
2084 sizeof(struct re_opaque) + api.opaque.length);
2085 re->opaque->length = api.opaque.length;
2086 memcpy(re->opaque->data, api.opaque.data, re->opaque->length);
2087 }
2088
2089 afi = family2afi(api.prefix.family);
2090 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
2091 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
2092 "%s: Received SRC Prefix but afi is not v6",
2093 __func__);
2094 nexthop_group_delete(&ng);
2095 zebra_nhg_backup_free(&bnhg);
2096 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2097 XFREE(MTYPE_RE, re);
2098 return;
2099 }
2100 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
2101 src_p = &api.src_prefix;
2102
2103 if (api.safi != SAFI_UNICAST && api.safi != SAFI_MULTICAST) {
2104 flog_warn(EC_LIB_ZAPI_MISSMATCH,
2105 "%s: Received safi: %d but we can only accept UNICAST or MULTICAST",
2106 __func__, api.safi);
2107 nexthop_group_delete(&ng);
2108 zebra_nhg_backup_free(&bnhg);
2109 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2110 XFREE(MTYPE_RE, re);
2111 return;
2112 }
2113
2114 /*
2115 * If we have an ID, this proto owns the NHG it sent along with the
2116 * route, so we just send the ID into rib code with it.
2117 *
2118 * Havent figured out how to handle backup NHs with this yet, so lets
2119 * keep that separate.
2120 * Include backup info with the route. We use a temporary nhe here;
2121 * if this is a new/unknown nhe, a new copy will be allocated
2122 * and stored.
2123 */
2124 if (!re->nhe_id) {
2125 zebra_nhe_init(&nhe, afi, ng->nexthop);
2126 nhe.nhg.nexthop = ng->nexthop;
2127 nhe.backup_info = bnhg;
2128 }
2129 ret = rib_add_multipath_nhe(afi, api.safi, &api.prefix, src_p,
2130 re, &nhe);
2131
2132 /*
2133 * rib_add_multipath_nhe only fails in a couple spots
2134 * and in those spots we have not freed memory
2135 */
2136 if (ret == -1) {
2137 client->error_cnt++;
2138 XFREE(MTYPE_RE_OPAQUE, re->opaque);
2139 XFREE(MTYPE_RE, re);
2140 }
2141
2142 /* At this point, these allocations are not needed: 're' has been
2143 * retained or freed, and if 're' still exists, it is using
2144 * a reference to a shared group object.
2145 */
2146 nexthop_group_delete(&ng);
2147 if (bnhg)
2148 zebra_nhg_backup_free(&bnhg);
2149
2150 /* Stats */
2151 switch (api.prefix.family) {
2152 case AF_INET:
2153 if (ret == 0)
2154 client->v4_route_add_cnt++;
2155 else if (ret == 1)
2156 client->v4_route_upd8_cnt++;
2157 break;
2158 case AF_INET6:
2159 if (ret == 0)
2160 client->v6_route_add_cnt++;
2161 else if (ret == 1)
2162 client->v6_route_upd8_cnt++;
2163 break;
2164 }
2165 }
2166
2167 void zapi_re_opaque_free(struct re_opaque *opaque)
2168 {
2169 XFREE(MTYPE_RE_OPAQUE, opaque);
2170 }
2171
2172 static void zread_route_del(ZAPI_HANDLER_ARGS)
2173 {
2174 struct stream *s;
2175 struct zapi_route api;
2176 afi_t afi;
2177 struct prefix_ipv6 *src_p = NULL;
2178 uint32_t table_id;
2179
2180 s = msg;
2181 if (zapi_route_decode(s, &api) < 0)
2182 return;
2183
2184 afi = family2afi(api.prefix.family);
2185 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
2186 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
2187 "%s: Received a src prefix while afi is not v6",
2188 __func__);
2189 return;
2190 }
2191 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
2192 src_p = &api.src_prefix;
2193
2194 if (api.tableid)
2195 table_id = api.tableid;
2196 else
2197 table_id = zvrf->table_id;
2198
2199 if (IS_ZEBRA_DEBUG_RECV)
2200 zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x",
2201 __func__, zvrf_id(zvrf), table_id, &api.prefix,
2202 (int)api.message, api.flags);
2203
2204 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
2205 api.flags, &api.prefix, src_p, NULL, 0, table_id, api.metric,
2206 api.distance, false);
2207
2208 /* Stats */
2209 switch (api.prefix.family) {
2210 case AF_INET:
2211 client->v4_route_del_cnt++;
2212 break;
2213 case AF_INET6:
2214 client->v6_route_del_cnt++;
2215 break;
2216 }
2217 }
2218
2219 /* MRIB Nexthop lookup for IPv4. */
2220 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
2221 {
2222 struct in_addr addr;
2223 struct route_entry *re;
2224
2225 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
2226 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
2227 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
2228
2229 stream_failure:
2230 return;
2231 }
2232
2233 /* Register zebra server router-id information. Send current router-id */
2234 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
2235 {
2236 afi_t afi;
2237 struct prefix p;
2238 struct prefix zero;
2239
2240 STREAM_GETW(msg, afi);
2241
2242 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
2243 zlog_warn(
2244 "Invalid AFI %u while registering for router ID notifications",
2245 afi);
2246 goto stream_failure;
2247 }
2248
2249 /* Router-id information is needed. */
2250 vrf_bitmap_set(client->ridinfo[afi], zvrf_id(zvrf));
2251
2252 router_id_get(afi, &p, zvrf);
2253
2254 /*
2255 * If we have not officially setup a router-id let's not
2256 * tell the upper level protocol about it yet.
2257 */
2258 memset(&zero, 0, sizeof(zero));
2259 if ((p.family == AF_INET && p.u.prefix4.s_addr == INADDR_ANY)
2260 || (p.family == AF_INET6
2261 && memcmp(&p.u.prefix6, &zero.u.prefix6,
2262 sizeof(struct in6_addr))
2263 == 0))
2264 return;
2265
2266 zsend_router_id_update(client, afi, &p, zvrf_id(zvrf));
2267
2268 stream_failure:
2269 return;
2270 }
2271
2272 /* Unregister zebra server router-id information. */
2273 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
2274 {
2275 afi_t afi;
2276
2277 STREAM_GETW(msg, afi);
2278
2279 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
2280 zlog_warn(
2281 "Invalid AFI %u while unregistering from router ID notifications",
2282 afi);
2283 goto stream_failure;
2284 }
2285
2286 vrf_bitmap_unset(client->ridinfo[afi], zvrf_id(zvrf));
2287
2288 stream_failure:
2289 return;
2290 }
2291
2292 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
2293 {
2294 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2295
2296 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
2297 stream_putl(s, vrf_get_backend());
2298 stream_putc(s, mpls_enabled);
2299 stream_putl(s, zrouter.multipath_num);
2300 stream_putc(s, zebra_mlag_get_role());
2301
2302 stream_putw_at(s, 0, stream_get_endp(s));
2303 zserv_send_message(client, s);
2304 }
2305
2306 void zsend_capabilities_all_clients(void)
2307 {
2308 struct listnode *node, *nnode;
2309 struct zebra_vrf *zvrf;
2310 struct zserv *client;
2311
2312 zvrf = vrf_info_lookup(VRF_DEFAULT);
2313 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
2314 /* Do not send unsolicited messages to synchronous clients. */
2315 if (client->synchronous)
2316 continue;
2317
2318 zsend_capabilities(client, zvrf);
2319 }
2320 }
2321
2322 /* Tie up route-type and client->sock */
2323 static void zread_hello(ZAPI_HANDLER_ARGS)
2324 {
2325 /* type of protocol (lib/zebra.h) */
2326 uint8_t proto;
2327 unsigned short instance;
2328 uint8_t notify;
2329 uint8_t synchronous;
2330 uint32_t session_id;
2331
2332 STREAM_GETC(msg, proto);
2333 STREAM_GETW(msg, instance);
2334 STREAM_GETL(msg, session_id);
2335 STREAM_GETC(msg, notify);
2336 STREAM_GETC(msg, synchronous);
2337 if (notify)
2338 client->notify_owner = true;
2339
2340 if (synchronous)
2341 client->synchronous = true;
2342
2343 /* accept only dynamic routing protocols */
2344 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
2345 zlog_notice(
2346 "client %d says hello and bids fair to announce only %s routes vrf=%u",
2347 client->sock, zebra_route_string(proto),
2348 zvrf->vrf->vrf_id);
2349 if (instance)
2350 zlog_notice("client protocol instance %d", instance);
2351
2352 client->proto = proto;
2353 client->instance = instance;
2354 client->session_id = session_id;
2355
2356 /* Graceful restart processing for client connect */
2357 zebra_gr_client_reconnect(client);
2358 }
2359
2360 if (!client->synchronous) {
2361 zsend_capabilities(client, zvrf);
2362 zebra_vrf_update_all(client);
2363 }
2364 stream_failure:
2365 return;
2366 }
2367
2368 /* Unregister all information in a VRF. */
2369 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
2370 {
2371 int i;
2372 afi_t afi;
2373
2374 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2375 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
2376 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
2377 vrf_bitmap_unset(client->redist_default[afi], zvrf_id(zvrf));
2378 vrf_bitmap_unset(client->ridinfo[afi], zvrf_id(zvrf));
2379 vrf_bitmap_unset(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
2380 }
2381 }
2382
2383 /*
2384 * Validate incoming zapi mpls lsp / labels message
2385 */
2386 static int zapi_labels_validate(const struct zapi_labels *zl)
2387 {
2388 int ret = -1;
2389 int i, j, idx;
2390 uint32_t bits[8];
2391 uint32_t ival;
2392 const struct zapi_nexthop *znh;
2393
2394 /* Validate backup info: no duplicates for a single primary */
2395 if (zl->backup_nexthop_num == 0) {
2396 ret = 0;
2397 goto done;
2398 }
2399
2400 for (j = 0; j < zl->nexthop_num; j++) {
2401 znh = &zl->nexthops[j];
2402
2403 memset(bits, 0, sizeof(bits));
2404
2405 for (i = 0; i < znh->backup_num; i++) {
2406 idx = znh->backup_idx[i] / 32;
2407
2408 ival = 1 << znh->backup_idx[i] % 32;
2409
2410 /* Check whether value is already used */
2411 if (ival & bits[idx]) {
2412 /* Fail */
2413
2414 if (IS_ZEBRA_DEBUG_RECV)
2415 zlog_debug("%s: invalid zapi mpls message: duplicate backup nexthop index %d",
2416 __func__,
2417 znh->backup_idx[i]);
2418 goto done;
2419 }
2420
2421 /* Mark index value */
2422 bits[idx] |= ival;
2423 }
2424 }
2425
2426 ret = 0;
2427
2428 done:
2429
2430 return ret;
2431 }
2432
2433 /*
2434 * Handle request to create an MPLS LSP.
2435 *
2436 * A single message can fully specify an LSP with multiple nexthops.
2437 *
2438 * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is
2439 * updated to use the received label(s).
2440 */
2441 static void zread_mpls_labels_add(ZAPI_HANDLER_ARGS)
2442 {
2443 struct stream *s;
2444 struct zapi_labels zl;
2445 int ret;
2446
2447 /* Get input stream. */
2448 s = msg;
2449 if (zapi_labels_decode(s, &zl) < 0) {
2450 if (IS_ZEBRA_DEBUG_RECV)
2451 zlog_debug("%s: Unable to decode zapi_labels sent",
2452 __func__);
2453 return;
2454 }
2455
2456 if (!mpls_enabled)
2457 return;
2458
2459 /* Validate; will debug on failure */
2460 if (zapi_labels_validate(&zl) < 0)
2461 return;
2462
2463 ret = mpls_zapi_labels_process(true, zvrf, &zl);
2464 if (ret < 0) {
2465 if (IS_ZEBRA_DEBUG_RECV)
2466 zlog_debug("%s: Error processing zapi request",
2467 __func__);
2468 }
2469 }
2470
2471 /*
2472 * Handle request to delete an MPLS LSP.
2473 *
2474 * An LSP is identified by its type and local label. When the received message
2475 * doesn't contain any nexthop, the whole LSP is deleted. Otherwise, only the
2476 * listed LSP nexthops (aka NHLFEs) are deleted.
2477 *
2478 * When the optional ZAPI_LABELS_FTN flag is set, the labels of the specified
2479 * FEC (route) nexthops are deleted.
2480 */
2481 static void zread_mpls_labels_delete(ZAPI_HANDLER_ARGS)
2482 {
2483 struct stream *s;
2484 struct zapi_labels zl;
2485 int ret;
2486
2487 /* Get input stream. */
2488 s = msg;
2489 if (zapi_labels_decode(s, &zl) < 0) {
2490 if (IS_ZEBRA_DEBUG_RECV)
2491 zlog_debug("%s: Unable to decode zapi_labels sent",
2492 __func__);
2493 return;
2494 }
2495
2496 if (!mpls_enabled)
2497 return;
2498
2499 if (zl.nexthop_num > 0) {
2500 ret = mpls_zapi_labels_process(false /*delete*/, zvrf, &zl);
2501 if (ret < 0) {
2502 if (IS_ZEBRA_DEBUG_RECV)
2503 zlog_debug("%s: Error processing zapi request",
2504 __func__);
2505 }
2506 } else {
2507 mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label);
2508
2509 if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
2510 mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix,
2511 zl.route.type, zl.route.instance);
2512 }
2513 }
2514
2515 /*
2516 * Handle request to add an MPLS LSP or change an existing one.
2517 *
2518 * A single message can fully specify an LSP with multiple nexthops.
2519 *
2520 * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is
2521 * updated to use the received label(s).
2522 *
2523 * NOTE: zebra will use route replace semantics (make-before-break) to update
2524 * the LSP in the forwarding plane if that's supported by the underlying
2525 * platform.
2526 */
2527 static void zread_mpls_labels_replace(ZAPI_HANDLER_ARGS)
2528 {
2529 struct stream *s;
2530 struct zapi_labels zl;
2531
2532 /* Get input stream. */
2533 s = msg;
2534 if (zapi_labels_decode(s, &zl) < 0) {
2535 if (IS_ZEBRA_DEBUG_RECV)
2536 zlog_debug("%s: Unable to decode zapi_labels sent",
2537 __func__);
2538 return;
2539 }
2540
2541 if (!mpls_enabled)
2542 return;
2543
2544 /* Validate; will debug on failure */
2545 if (zapi_labels_validate(&zl) < 0)
2546 return;
2547
2548 /* This removes everything, then re-adds from the client's
2549 * zapi message. Since the LSP will be processed later, on this
2550 * this same pthread, all of the changes will 'appear' at once.
2551 */
2552 mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label);
2553 if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
2554 mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix,
2555 zl.route.type, zl.route.instance);
2556
2557 mpls_zapi_labels_process(true, zvrf, &zl);
2558 }
2559
2560 static void zread_sr_policy_set(ZAPI_HANDLER_ARGS)
2561 {
2562 struct stream *s;
2563 struct zapi_sr_policy zp;
2564 struct zapi_srte_tunnel *zt;
2565 struct zebra_sr_policy *policy;
2566
2567 /* Get input stream. */
2568 s = msg;
2569 if (zapi_sr_policy_decode(s, &zp) < 0) {
2570 if (IS_ZEBRA_DEBUG_RECV)
2571 zlog_debug("%s: Unable to decode zapi_sr_policy sent",
2572 __func__);
2573 return;
2574 }
2575 zt = &zp.segment_list;
2576 if (zt->label_num < 1) {
2577 if (IS_ZEBRA_DEBUG_RECV)
2578 zlog_debug(
2579 "%s: SR-TE tunnel must contain at least one label",
2580 __func__);
2581 return;
2582 }
2583
2584 if (!mpls_enabled)
2585 return;
2586
2587 policy = zebra_sr_policy_find(zp.color, &zp.endpoint);
2588 if (!policy)
2589 policy = zebra_sr_policy_add(zp.color, &zp.endpoint, zp.name);
2590 /* TODO: per-VRF list of SR-TE policies. */
2591 policy->zvrf = zvrf;
2592
2593 zebra_sr_policy_validate(policy, &zp.segment_list);
2594 }
2595
2596 static void zread_sr_policy_delete(ZAPI_HANDLER_ARGS)
2597 {
2598 struct stream *s;
2599 struct zapi_sr_policy zp;
2600 struct zebra_sr_policy *policy;
2601
2602 /* Get input stream. */
2603 s = msg;
2604 if (zapi_sr_policy_decode(s, &zp) < 0) {
2605 if (IS_ZEBRA_DEBUG_RECV)
2606 zlog_debug("%s: Unable to decode zapi_sr_policy sent",
2607 __func__);
2608 return;
2609 }
2610
2611 if (!mpls_enabled)
2612 return;
2613
2614 policy = zebra_sr_policy_find(zp.color, &zp.endpoint);
2615 if (!policy) {
2616 if (IS_ZEBRA_DEBUG_RECV)
2617 zlog_debug("%s: Unable to find SR-TE policy", __func__);
2618 return;
2619 }
2620
2621 zebra_sr_policy_del(policy);
2622 }
2623
2624 int zsend_sr_policy_notify_status(uint32_t color, struct ipaddr *endpoint,
2625 char *name, int status)
2626 {
2627 struct zserv *client;
2628 struct stream *s;
2629
2630 client = zserv_find_client(ZEBRA_ROUTE_SRTE, 0);
2631 if (!client) {
2632 if (IS_ZEBRA_DEBUG_PACKET)
2633 zlog_debug(
2634 "Not notifying pathd about policy %s"
2635 " status change to %d",
2636 name, status);
2637 return 0;
2638 }
2639
2640 if (IS_ZEBRA_DEBUG_PACKET)
2641 zlog_debug(
2642 "Notifying pathd about policy %s status change"
2643 " to %d",
2644 name, status);
2645
2646 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2647 stream_reset(s);
2648
2649 zclient_create_header(s, ZEBRA_SR_POLICY_NOTIFY_STATUS, VRF_DEFAULT);
2650 stream_putl(s, color);
2651 stream_put_ipaddr(s, endpoint);
2652 stream_write(s, name, SRTE_POLICY_NAME_MAX_LENGTH);
2653 stream_putl(s, status);
2654
2655 stream_putw_at(s, 0, stream_get_endp(s));
2656
2657 return zserv_send_message(client, s);
2658 }
2659
2660 /* Send client close notify to client */
2661 int zsend_client_close_notify(struct zserv *client, struct zserv *closed_client)
2662 {
2663 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2664
2665 zclient_create_header(s, ZEBRA_CLIENT_CLOSE_NOTIFY, VRF_DEFAULT);
2666
2667 stream_putc(s, closed_client->proto);
2668 stream_putw(s, closed_client->instance);
2669 stream_putl(s, closed_client->session_id);
2670
2671 stream_putw_at(s, 0, stream_get_endp(s));
2672
2673 return zserv_send_message(client, s);
2674 }
2675
2676 int zsend_srv6_manager_get_locator_chunk_response(struct zserv *client,
2677 vrf_id_t vrf_id,
2678 struct srv6_locator *loc)
2679 {
2680 struct srv6_locator_chunk chunk = {};
2681 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
2682
2683 strlcpy(chunk.locator_name, loc->name, sizeof(chunk.locator_name));
2684 chunk.prefix = loc->prefix;
2685 chunk.block_bits_length = loc->block_bits_length;
2686 chunk.node_bits_length = loc->node_bits_length;
2687 chunk.function_bits_length = loc->function_bits_length;
2688 chunk.argument_bits_length = loc->argument_bits_length;
2689 chunk.keep = 0;
2690 chunk.proto = client->proto;
2691 chunk.instance = client->instance;
2692
2693 zclient_create_header(s, ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK, vrf_id);
2694 zapi_srv6_locator_chunk_encode(s, &chunk);
2695 stream_putw_at(s, 0, stream_get_endp(s));
2696 return zserv_send_message(client, s);
2697 }
2698
2699 /* Send response to a table manager connect request to client */
2700 static void zread_table_manager_connect(struct zserv *client,
2701 struct stream *msg, vrf_id_t vrf_id)
2702 {
2703 struct stream *s;
2704 uint8_t proto;
2705 uint16_t instance;
2706 struct vrf *vrf = vrf_lookup_by_id(vrf_id);
2707
2708 s = msg;
2709
2710 /* Get data. */
2711 STREAM_GETC(s, proto);
2712 STREAM_GETW(s, instance);
2713
2714 /* accept only dynamic routing protocols */
2715 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
2716 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
2717 "client %d has wrong protocol %s", client->sock,
2718 zebra_route_string(proto));
2719 zsend_table_manager_connect_response(client, vrf_id, 1);
2720 return;
2721 }
2722 zlog_notice("client %d with vrf %s(%u) instance %u connected as %s",
2723 client->sock, VRF_LOGNAME(vrf), vrf_id, instance,
2724 zebra_route_string(proto));
2725 client->proto = proto;
2726 client->instance = instance;
2727
2728 /*
2729 * Release previous labels of same protocol and instance.
2730 * This is done in case it restarted from an unexpected shutdown.
2731 */
2732 release_daemon_table_chunks(client);
2733
2734 zsend_table_manager_connect_response(client, vrf_id, 0);
2735
2736 stream_failure:
2737 return;
2738 }
2739
2740 static void zread_label_manager_connect(struct zserv *client,
2741 struct stream *msg, vrf_id_t vrf_id)
2742 {
2743 struct stream *s;
2744 /* type of protocol (lib/zebra.h) */
2745 uint8_t proto;
2746 unsigned short instance;
2747
2748 /* Get input stream. */
2749 s = msg;
2750
2751 /* Get data. */
2752 STREAM_GETC(s, proto);
2753 STREAM_GETW(s, instance);
2754
2755 /* accept only dynamic routing protocols */
2756 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
2757 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
2758 "client %d has wrong protocol %s", client->sock,
2759 zebra_route_string(proto));
2760 zsend_label_manager_connect_response(client, vrf_id, 1);
2761 return;
2762 }
2763
2764 /* recall proto and instance in this socket */
2765 client->proto = proto;
2766 client->instance = instance;
2767
2768 /* call hook for connection using wrapper */
2769 lm_client_connect_call(client, vrf_id);
2770
2771 stream_failure:
2772 return;
2773 }
2774
2775 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
2776 vrf_id_t vrf_id)
2777 {
2778 struct stream *s;
2779 uint8_t keep;
2780 uint32_t size, base;
2781 struct label_manager_chunk *lmc = NULL;
2782 uint8_t proto;
2783 unsigned short instance;
2784
2785 /* Get input stream. */
2786 s = msg;
2787
2788 /* Get data. */
2789 STREAM_GETC(s, proto);
2790 STREAM_GETW(s, instance);
2791 STREAM_GETC(s, keep);
2792 STREAM_GETL(s, size);
2793 STREAM_GETL(s, base);
2794
2795 assert(proto == client->proto && instance == client->instance);
2796
2797 /* call hook to get a chunk using wrapper */
2798 lm_get_chunk_call(&lmc, client, keep, size, base, vrf_id);
2799
2800 stream_failure:
2801 return;
2802 }
2803
2804 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
2805 {
2806 struct stream *s;
2807 uint32_t start, end;
2808 uint8_t proto;
2809 unsigned short instance;
2810
2811 /* Get input stream. */
2812 s = msg;
2813
2814 /* Get data. */
2815 STREAM_GETC(s, proto);
2816 STREAM_GETW(s, instance);
2817 STREAM_GETL(s, start);
2818 STREAM_GETL(s, end);
2819
2820 assert(proto == client->proto && instance == client->instance);
2821
2822 /* call hook to release a chunk using wrapper */
2823 lm_release_chunk_call(client, start, end);
2824
2825 stream_failure:
2826 return;
2827 }
2828
2829 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
2830 {
2831 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT
2832 || hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC)
2833 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
2834 else {
2835 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
2836 zread_get_label_chunk(client, msg, zvrf_id(zvrf));
2837 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
2838 zread_release_label_chunk(client, msg);
2839 }
2840 }
2841
2842 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
2843 struct zebra_vrf *zvrf)
2844 {
2845 struct stream *s;
2846 uint32_t size;
2847 struct table_manager_chunk *tmc;
2848
2849 /* Get input stream. */
2850 s = msg;
2851
2852 /* Get data. */
2853 STREAM_GETL(s, size);
2854
2855 tmc = assign_table_chunk(client->proto, client->instance, size, zvrf);
2856 if (!tmc)
2857 flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK,
2858 "%s: Unable to assign Table Chunk of size %u",
2859 __func__, size);
2860 else
2861 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
2862 tmc->end);
2863 /* send response back */
2864 zsend_assign_table_chunk_response(client, zvrf_id(zvrf), tmc);
2865
2866 stream_failure:
2867 return;
2868 }
2869
2870 static void zread_release_table_chunk(struct zserv *client, struct stream *msg,
2871 struct zebra_vrf *zvrf)
2872 {
2873 struct stream *s;
2874 uint32_t start, end;
2875
2876 /* Get input stream. */
2877 s = msg;
2878
2879 /* Get data. */
2880 STREAM_GETL(s, start);
2881 STREAM_GETL(s, end);
2882
2883 release_table_chunk(client->proto, client->instance, start, end, zvrf);
2884
2885 stream_failure:
2886 return;
2887 }
2888
2889 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2890 {
2891 /* to avoid sending other messages like ZEBRA_INTERFACE_UP */
2892 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2893 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2894 else {
2895 /* Sanity: don't allow 'unidentified' requests */
2896 if (!client->proto) {
2897 flog_err(
2898 EC_ZEBRA_TM_ALIENS,
2899 "Got SRv6 request from an unidentified client");
2900 return;
2901 }
2902 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2903 zread_get_table_chunk(client, msg, zvrf);
2904 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2905 zread_release_table_chunk(client, msg, zvrf);
2906 }
2907 }
2908
2909 static void zread_srv6_manager_get_locator_chunk(struct zserv *client,
2910 struct stream *msg,
2911 vrf_id_t vrf_id)
2912 {
2913 struct stream *s = msg;
2914 uint16_t len;
2915 char locator_name[SRV6_LOCNAME_SIZE] = {0};
2916
2917 /* Get data. */
2918 STREAM_GETW(s, len);
2919 STREAM_GET(locator_name, s, len);
2920
2921 /* call hook to get a chunk using wrapper */
2922 struct srv6_locator *loc = NULL;
2923 srv6_manager_get_locator_chunk_call(&loc, client, locator_name, vrf_id);
2924
2925 stream_failure:
2926 return;
2927 }
2928
2929 static void zread_srv6_manager_release_locator_chunk(struct zserv *client,
2930 struct stream *msg,
2931 vrf_id_t vrf_id)
2932 {
2933 struct stream *s = msg;
2934 uint16_t len;
2935 char locator_name[SRV6_LOCNAME_SIZE] = {0};
2936
2937 /* Get data. */
2938 STREAM_GETW(s, len);
2939 STREAM_GET(locator_name, s, len);
2940
2941 /* call hook to release a chunk using wrapper */
2942 srv6_manager_release_locator_chunk_call(client, locator_name, vrf_id);
2943
2944 stream_failure:
2945 return;
2946 }
2947
2948 static void zread_srv6_manager_request(ZAPI_HANDLER_ARGS)
2949 {
2950 switch (hdr->command) {
2951 case ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK:
2952 zread_srv6_manager_get_locator_chunk(client, msg,
2953 zvrf_id(zvrf));
2954 break;
2955 case ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK:
2956 zread_srv6_manager_release_locator_chunk(client, msg,
2957 zvrf_id(zvrf));
2958 break;
2959 default:
2960 zlog_err("%s: unknown SRv6 Manager command", __func__);
2961 break;
2962 }
2963 }
2964
2965 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2966 {
2967 struct stream *s;
2968 char ifname[IF_NAMESIZE];
2969 ifindex_t ifindex;
2970 int type;
2971 int af;
2972 union g_addr nexthop;
2973 uint32_t local_label;
2974 uint32_t remote_label;
2975 uint8_t flags;
2976 union pw_protocol_fields data;
2977 uint8_t protocol;
2978 struct zebra_pw *pw;
2979
2980 /* Get input stream. */
2981 s = msg;
2982
2983 /* Get data. */
2984 STREAM_GET(ifname, s, IF_NAMESIZE);
2985 ifname[IF_NAMESIZE - 1] = '\0';
2986 STREAM_GETL(s, ifindex);
2987 STREAM_GETL(s, type);
2988 STREAM_GETL(s, af);
2989 switch (af) {
2990 case AF_INET:
2991 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
2992 break;
2993 case AF_INET6:
2994 STREAM_GET(&nexthop.ipv6, s, 16);
2995 break;
2996 default:
2997 return;
2998 }
2999 STREAM_GETL(s, local_label);
3000 STREAM_GETL(s, remote_label);
3001 STREAM_GETC(s, flags);
3002 STREAM_GET(&data, s, sizeof(data));
3003 protocol = client->proto;
3004
3005 pw = zebra_pw_find(zvrf, ifname);
3006 switch (hdr->command) {
3007 case ZEBRA_PW_ADD:
3008 if (pw) {
3009 flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS,
3010 "%s: pseudowire %s already exists [%s]",
3011 __func__, ifname,
3012 zserv_command_string(hdr->command));
3013 return;
3014 }
3015
3016 zebra_pw_add(zvrf, ifname, protocol, client);
3017 break;
3018 case ZEBRA_PW_DELETE:
3019 if (!pw) {
3020 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
3021 "%s: pseudowire %s not found [%s]", __func__,
3022 ifname, zserv_command_string(hdr->command));
3023 return;
3024 }
3025
3026 zebra_pw_del(zvrf, pw);
3027 break;
3028 case ZEBRA_PW_SET:
3029 case ZEBRA_PW_UNSET:
3030 if (!pw) {
3031 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
3032 "%s: pseudowire %s not found [%s]", __func__,
3033 ifname, zserv_command_string(hdr->command));
3034 return;
3035 }
3036
3037 switch (hdr->command) {
3038 case ZEBRA_PW_SET:
3039 pw->enabled = 1;
3040 break;
3041 case ZEBRA_PW_UNSET:
3042 pw->enabled = 0;
3043 break;
3044 }
3045
3046 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
3047 remote_label, flags, &data);
3048 break;
3049 }
3050
3051 stream_failure:
3052 return;
3053 }
3054
3055 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
3056 {
3057 struct interface *master;
3058 struct interface *slave;
3059 struct stream *s = msg;
3060 int ifindex;
3061 vrf_id_t vrf_id;
3062
3063 STREAM_GETL(s, vrf_id);
3064 STREAM_GETL(s, ifindex);
3065 master = if_lookup_by_index(ifindex, vrf_id);
3066
3067 STREAM_GETL(s, vrf_id);
3068 STREAM_GETL(s, ifindex);
3069 slave = if_lookup_by_index(ifindex, vrf_id);
3070
3071 if (!master || !slave)
3072 return;
3073
3074 kernel_interface_set_master(master, slave);
3075
3076 stream_failure:
3077 return;
3078 }
3079
3080
3081 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
3082 {
3083 struct interface *ifp;
3084 mpls_label_t nlabel;
3085 afi_t afi;
3086 struct stream *s;
3087 struct zebra_vrf *def_zvrf;
3088 enum lsp_types_t ltype;
3089
3090 s = msg;
3091 STREAM_GETL(s, nlabel);
3092 STREAM_GETC(s, afi);
3093
3094 if (!(IS_VALID_AFI(afi))) {
3095 zlog_warn("Invalid AFI for VRF label: %u", afi);
3096 return;
3097 }
3098
3099 if (nlabel == zvrf->label[afi]) {
3100 /*
3101 * Nothing to do here move along
3102 */
3103 return;
3104 }
3105
3106 STREAM_GETC(s, ltype);
3107
3108 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
3109 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
3110 else
3111 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
3112
3113 if (!ifp) {
3114 zlog_debug("Unable to find specified Interface for %s",
3115 zvrf->vrf->name);
3116 return;
3117 }
3118
3119 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
3120
3121 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
3122 afi_t scrubber;
3123 bool really_remove;
3124
3125 really_remove = true;
3126 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
3127 if (scrubber == afi)
3128 continue;
3129
3130 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
3131 continue;
3132
3133 if (zvrf->label[afi] == zvrf->label[scrubber]) {
3134 really_remove = false;
3135 break;
3136 }
3137 }
3138
3139 if (really_remove)
3140 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
3141 NEXTHOP_TYPE_IFINDEX, NULL,
3142 ifp->ifindex, false /*backup*/);
3143 }
3144
3145 if (nlabel != MPLS_LABEL_NONE) {
3146 mpls_label_t out_label = MPLS_LABEL_IMPLICIT_NULL;
3147 mpls_lsp_install(def_zvrf, ltype, nlabel, 1, &out_label,
3148 NEXTHOP_TYPE_IFINDEX, NULL, ifp->ifindex);
3149 }
3150
3151 zvrf->label[afi] = nlabel;
3152 zvrf->label_proto[afi] = client->proto;
3153
3154 stream_failure:
3155 return;
3156 }
3157
3158 static inline void zread_rule(ZAPI_HANDLER_ARGS)
3159 {
3160 struct zebra_pbr_rule zpr;
3161 struct stream *s;
3162 uint32_t total, i;
3163 char ifname[INTERFACE_NAMSIZ + 1] = {};
3164
3165 s = msg;
3166 STREAM_GETL(s, total);
3167
3168 for (i = 0; i < total; i++) {
3169 memset(&zpr, 0, sizeof(zpr));
3170
3171 zpr.sock = client->sock;
3172 zpr.rule.vrf_id = hdr->vrf_id;
3173 STREAM_GETL(s, zpr.rule.seq);
3174 STREAM_GETL(s, zpr.rule.priority);
3175 STREAM_GETL(s, zpr.rule.unique);
3176 STREAM_GETC(s, zpr.rule.filter.ip_proto);
3177 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
3178 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
3179 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
3180 prefix_blen(&zpr.rule.filter.src_ip));
3181 STREAM_GETW(s, zpr.rule.filter.src_port);
3182 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
3183 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
3184 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
3185 prefix_blen(&zpr.rule.filter.dst_ip));
3186 STREAM_GETW(s, zpr.rule.filter.dst_port);
3187 STREAM_GETC(s, zpr.rule.filter.dsfield);
3188 STREAM_GETL(s, zpr.rule.filter.fwmark);
3189
3190 STREAM_GETL(s, zpr.rule.action.queue_id);
3191 STREAM_GETW(s, zpr.rule.action.vlan_id);
3192 STREAM_GETW(s, zpr.rule.action.vlan_flags);
3193 STREAM_GETW(s, zpr.rule.action.pcp);
3194
3195 STREAM_GETL(s, zpr.rule.action.table);
3196 STREAM_GET(ifname, s, INTERFACE_NAMSIZ);
3197
3198 strlcpy(zpr.ifname, ifname, sizeof(zpr.ifname));
3199 strlcpy(zpr.rule.ifname, ifname, sizeof(zpr.rule.ifname));
3200
3201 if (!is_default_prefix(&zpr.rule.filter.src_ip))
3202 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
3203
3204 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
3205 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
3206
3207 if (zpr.rule.filter.src_port)
3208 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
3209
3210 if (zpr.rule.filter.dst_port)
3211 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
3212
3213 if (zpr.rule.filter.dsfield)
3214 zpr.rule.filter.filter_bm |= PBR_FILTER_DSFIELD;
3215
3216 if (zpr.rule.filter.ip_proto)
3217 zpr.rule.filter.filter_bm |= PBR_FILTER_IP_PROTOCOL;
3218
3219 if (zpr.rule.filter.fwmark)
3220 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
3221
3222 if (!(zpr.rule.filter.src_ip.family == AF_INET
3223 || zpr.rule.filter.src_ip.family == AF_INET6)) {
3224 zlog_warn(
3225 "Unsupported PBR source IP family: %s (%hhu)",
3226 family2str(zpr.rule.filter.src_ip.family),
3227 zpr.rule.filter.src_ip.family);
3228 return;
3229 }
3230 if (!(zpr.rule.filter.dst_ip.family == AF_INET
3231 || zpr.rule.filter.dst_ip.family == AF_INET6)) {
3232 zlog_warn(
3233 "Unsupported PBR destination IP family: %s (%hhu)",
3234 family2str(zpr.rule.filter.dst_ip.family),
3235 zpr.rule.filter.dst_ip.family);
3236 return;
3237 }
3238
3239
3240 zpr.vrf_id = zvrf->vrf->vrf_id;
3241 if (hdr->command == ZEBRA_RULE_ADD)
3242 zebra_pbr_add_rule(&zpr);
3243 else
3244 zebra_pbr_del_rule(&zpr);
3245 }
3246
3247 stream_failure:
3248 return;
3249 }
3250
3251 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
3252 {
3253 struct zebra_pbr_ipset zpi;
3254 struct stream *s;
3255 uint32_t total, i;
3256
3257 s = msg;
3258 STREAM_GETL(s, total);
3259
3260 for (i = 0; i < total; i++) {
3261 memset(&zpi, 0, sizeof(zpi));
3262
3263 zpi.sock = client->sock;
3264 zpi.vrf_id = zvrf->vrf->vrf_id;
3265 STREAM_GETL(s, zpi.unique);
3266 STREAM_GETL(s, zpi.type);
3267 STREAM_GETC(s, zpi.family);
3268 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3269
3270 if (hdr->command == ZEBRA_IPSET_CREATE)
3271 zebra_pbr_create_ipset(&zpi);
3272 else
3273 zebra_pbr_destroy_ipset(&zpi);
3274 }
3275
3276 stream_failure:
3277 return;
3278 }
3279
3280 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
3281 {
3282 struct zebra_pbr_ipset_entry zpi;
3283 struct zebra_pbr_ipset ipset;
3284 struct stream *s;
3285 uint32_t total, i;
3286
3287 s = msg;
3288 STREAM_GETL(s, total);
3289
3290 for (i = 0; i < total; i++) {
3291 memset(&zpi, 0, sizeof(zpi));
3292 memset(&ipset, 0, sizeof(ipset));
3293
3294 zpi.sock = client->sock;
3295 STREAM_GETL(s, zpi.unique);
3296 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3297 ipset.ipset_name[ZEBRA_IPSET_NAME_SIZE - 1] = '\0';
3298 STREAM_GETC(s, zpi.src.family);
3299 STREAM_GETC(s, zpi.src.prefixlen);
3300 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
3301 STREAM_GETC(s, zpi.dst.family);
3302 STREAM_GETC(s, zpi.dst.prefixlen);
3303 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
3304
3305 STREAM_GETW(s, zpi.src_port_min);
3306 STREAM_GETW(s, zpi.src_port_max);
3307 STREAM_GETW(s, zpi.dst_port_min);
3308 STREAM_GETW(s, zpi.dst_port_max);
3309 STREAM_GETC(s, zpi.proto);
3310 if (!is_default_prefix(&zpi.src))
3311 zpi.filter_bm |= PBR_FILTER_SRC_IP;
3312
3313 if (!is_default_prefix(&zpi.dst))
3314 zpi.filter_bm |= PBR_FILTER_DST_IP;
3315 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
3316 zpi.filter_bm |= PBR_FILTER_DST_PORT;
3317 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
3318 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
3319 if (zpi.dst_port_max != 0)
3320 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
3321 if (zpi.src_port_max != 0)
3322 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
3323 if (zpi.proto != 0)
3324 zpi.filter_bm |= PBR_FILTER_PROTO;
3325
3326 if (!(zpi.dst.family == AF_INET
3327 || zpi.dst.family == AF_INET6)) {
3328 zlog_warn(
3329 "Unsupported PBR destination IP family: %s (%hhu)",
3330 family2str(zpi.dst.family), zpi.dst.family);
3331 goto stream_failure;
3332 }
3333 if (!(zpi.src.family == AF_INET
3334 || zpi.src.family == AF_INET6)) {
3335 zlog_warn(
3336 "Unsupported PBR source IP family: %s (%hhu)",
3337 family2str(zpi.src.family), zpi.src.family);
3338 goto stream_failure;
3339 }
3340
3341 /* calculate backpointer */
3342 zpi.backpointer =
3343 zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
3344
3345 if (!zpi.backpointer) {
3346 zlog_warn("ipset name specified: %s does not exist",
3347 ipset.ipset_name);
3348 goto stream_failure;
3349 }
3350
3351 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
3352 zebra_pbr_add_ipset_entry(&zpi);
3353 else
3354 zebra_pbr_del_ipset_entry(&zpi);
3355 }
3356
3357 stream_failure:
3358 return;
3359 }
3360
3361
3362 static inline void zebra_neigh_register(ZAPI_HANDLER_ARGS)
3363 {
3364 afi_t afi;
3365
3366 STREAM_GETW(msg, afi);
3367 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
3368 zlog_warn(
3369 "Invalid AFI %u while registering for neighbors notifications",
3370 afi);
3371 goto stream_failure;
3372 }
3373 vrf_bitmap_set(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
3374 stream_failure:
3375 return;
3376 }
3377
3378 static inline void zebra_neigh_unregister(ZAPI_HANDLER_ARGS)
3379 {
3380 afi_t afi;
3381
3382 STREAM_GETW(msg, afi);
3383 if (afi <= AFI_UNSPEC || afi >= AFI_MAX) {
3384 zlog_warn(
3385 "Invalid AFI %u while unregistering from neighbor notifications",
3386 afi);
3387 goto stream_failure;
3388 }
3389 vrf_bitmap_unset(client->nhrp_neighinfo[afi], zvrf_id(zvrf));
3390 stream_failure:
3391 return;
3392 }
3393
3394 static inline void zebra_gre_get(ZAPI_HANDLER_ARGS)
3395 {
3396 struct stream *s;
3397 ifindex_t idx;
3398 struct interface *ifp;
3399 struct zebra_if *zebra_if = NULL;
3400 struct zebra_l2info_gre *gre_info;
3401 struct interface *ifp_link = NULL;
3402 vrf_id_t vrf_id_link = VRF_UNKNOWN;
3403 vrf_id_t vrf_id = zvrf->vrf->vrf_id;
3404
3405 s = msg;
3406 STREAM_GETL(s, idx);
3407 ifp = if_lookup_by_index(idx, vrf_id);
3408
3409 if (ifp)
3410 zebra_if = ifp->info;
3411
3412 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
3413
3414 zclient_create_header(s, ZEBRA_GRE_UPDATE, vrf_id);
3415
3416 if (ifp && IS_ZEBRA_IF_GRE(ifp) && zebra_if) {
3417 gre_info = &zebra_if->l2info.gre;
3418
3419 stream_putl(s, idx);
3420 stream_putl(s, gre_info->ikey);
3421 stream_putl(s, gre_info->ikey);
3422 stream_putl(s, gre_info->ifindex_link);
3423
3424 ifp_link = if_lookup_by_index_per_ns(
3425 zebra_ns_lookup(gre_info->link_nsid),
3426 gre_info->ifindex_link);
3427 if (ifp_link)
3428 vrf_id_link = ifp_link->vrf->vrf_id;
3429 stream_putl(s, vrf_id_link);
3430 stream_putl(s, gre_info->vtep_ip.s_addr);
3431 stream_putl(s, gre_info->vtep_ip_remote.s_addr);
3432 } else {
3433 stream_putl(s, idx);
3434 stream_putl(s, 0);
3435 stream_putl(s, 0);
3436 stream_putl(s, IFINDEX_INTERNAL);
3437 stream_putl(s, VRF_UNKNOWN);
3438 stream_putl(s, 0);
3439 stream_putl(s, 0);
3440 }
3441 /* Write packet size. */
3442 stream_putw_at(s, 0, stream_get_endp(s));
3443 zserv_send_message(client, s);
3444
3445 return;
3446 stream_failure:
3447 return;
3448 }
3449
3450 static inline void zebra_configure_arp(ZAPI_HANDLER_ARGS)
3451 {
3452 struct stream *s;
3453 uint8_t fam;
3454 ifindex_t idx;
3455 struct interface *ifp;
3456
3457 s = msg;
3458 STREAM_GETC(s, fam);
3459 if (fam != AF_INET && fam != AF_INET6)
3460 return;
3461 STREAM_GETL(s, idx);
3462 ifp = if_lookup_by_index_per_ns(zvrf->zns, idx);
3463 if (!ifp)
3464 return;
3465 dplane_neigh_table_update(ifp, fam, 1, 0, 0);
3466 stream_failure:
3467 return;
3468 }
3469
3470 static inline void zebra_neigh_ip_add(ZAPI_HANDLER_ARGS)
3471 {
3472 struct stream *s;
3473 struct zapi_neigh_ip api = {};
3474 int ret;
3475 const struct interface *ifp;
3476
3477 s = msg;
3478 ret = zclient_neigh_ip_decode(s, &api);
3479 if (ret < 0)
3480 return;
3481 ifp = if_lookup_by_index(api.index, zvrf_id(zvrf));
3482 if (!ifp)
3483 return;
3484 dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_INSTALL, ifp, &api.ip_out,
3485 &api.ip_in, api.ndm_state, client->proto);
3486 }
3487
3488
3489 static inline void zebra_neigh_ip_del(ZAPI_HANDLER_ARGS)
3490 {
3491 struct stream *s;
3492 struct zapi_neigh_ip api = {};
3493 int ret;
3494 struct interface *ifp;
3495
3496 s = msg;
3497 ret = zclient_neigh_ip_decode(s, &api);
3498 if (ret < 0)
3499 return;
3500 ifp = if_lookup_by_index(api.index, zvrf_id(zvrf));
3501 if (!ifp)
3502 return;
3503 dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_DELETE, ifp, &api.ip_out,
3504 &api.ip_in, api.ndm_state, client->proto);
3505 }
3506
3507
3508 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
3509 {
3510 struct zebra_pbr_iptable *zpi =
3511 XCALLOC(MTYPE_TMP, sizeof(struct zebra_pbr_iptable));
3512 struct stream *s;
3513
3514 s = msg;
3515
3516 zpi->interface_name_list = list_new();
3517 zpi->sock = client->sock;
3518 zpi->vrf_id = zvrf->vrf->vrf_id;
3519 STREAM_GETL(s, zpi->unique);
3520 STREAM_GETL(s, zpi->type);
3521 STREAM_GETL(s, zpi->filter_bm);
3522 STREAM_GETL(s, zpi->action);
3523 STREAM_GETL(s, zpi->fwmark);
3524 STREAM_GET(&zpi->ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
3525 STREAM_GETC(s, zpi->family);
3526 STREAM_GETW(s, zpi->pkt_len_min);
3527 STREAM_GETW(s, zpi->pkt_len_max);
3528 STREAM_GETW(s, zpi->tcp_flags);
3529 STREAM_GETW(s, zpi->tcp_mask_flags);
3530 STREAM_GETC(s, zpi->dscp_value);
3531 STREAM_GETC(s, zpi->fragment);
3532 STREAM_GETC(s, zpi->protocol);
3533 STREAM_GETW(s, zpi->flow_label);
3534 STREAM_GETL(s, zpi->nb_interface);
3535 zebra_pbr_iptable_update_interfacelist(s, zpi);
3536
3537 if (hdr->command == ZEBRA_IPTABLE_ADD)
3538 zebra_pbr_add_iptable(zpi);
3539 else
3540 zebra_pbr_del_iptable(zpi);
3541
3542 stream_failure:
3543 zebra_pbr_iptable_free(zpi);
3544 zpi = NULL;
3545 return;
3546 }
3547
3548 static inline void zread_neigh_discover(ZAPI_HANDLER_ARGS)
3549 {
3550 struct stream *s;
3551 ifindex_t ifindex;
3552 struct interface *ifp;
3553 struct prefix p;
3554 struct ipaddr ip;
3555
3556 s = msg;
3557
3558 STREAM_GETL(s, ifindex);
3559
3560 ifp = if_lookup_by_index_per_ns(zvrf->zns, ifindex);
3561 if (!ifp) {
3562 zlog_debug("Failed to lookup ifindex: %u", ifindex);
3563 return;
3564 }
3565
3566 STREAM_GETC(s, p.family);
3567 STREAM_GETC(s, p.prefixlen);
3568 STREAM_GET(&p.u.prefix, s, prefix_blen(&p));
3569
3570 if (p.family == AF_INET)
3571 SET_IPADDR_V4(&ip);
3572 else
3573 SET_IPADDR_V6(&ip);
3574
3575 memcpy(&ip.ip.addr, &p.u.prefix, prefix_blen(&p));
3576
3577 dplane_neigh_discover(ifp, &ip);
3578
3579 stream_failure:
3580 return;
3581 }
3582
3583 static inline void zebra_gre_source_set(ZAPI_HANDLER_ARGS)
3584 {
3585 struct stream *s;
3586 ifindex_t idx, link_idx;
3587 vrf_id_t link_vrf_id;
3588 struct interface *ifp;
3589 struct interface *ifp_link;
3590 vrf_id_t vrf_id = zvrf->vrf->vrf_id;
3591 struct zebra_if *zif, *gre_zif;
3592 struct zebra_l2info_gre *gre_info;
3593 unsigned int mtu;
3594
3595 s = msg;
3596 STREAM_GETL(s, idx);
3597 ifp = if_lookup_by_index(idx, vrf_id);
3598 STREAM_GETL(s, link_idx);
3599 STREAM_GETL(s, link_vrf_id);
3600 STREAM_GETL(s, mtu);
3601
3602 ifp_link = if_lookup_by_index(link_idx, link_vrf_id);
3603 if (!ifp_link || !ifp) {
3604 zlog_warn("GRE (index %u, VRF %u) or GRE link interface (index %u, VRF %u) not found, when setting GRE params",
3605 idx, vrf_id, link_idx, link_vrf_id);
3606 return;
3607 }
3608
3609 if (!IS_ZEBRA_IF_GRE(ifp))
3610 return;
3611
3612 gre_zif = (struct zebra_if *)ifp->info;
3613 zif = (struct zebra_if *)ifp_link->info;
3614 if (!zif || !gre_zif)
3615 return;
3616
3617 gre_info = &zif->l2info.gre;
3618 if (!gre_info)
3619 return;
3620
3621 if (!mtu)
3622 mtu = ifp->mtu;
3623
3624 /* if gre link already set or mtu did not change, do not set it */
3625 if (gre_zif->link && gre_zif->link == ifp_link && mtu == ifp->mtu)
3626 return;
3627
3628 dplane_gre_set(ifp, ifp_link, mtu, gre_info);
3629
3630 stream_failure:
3631 return;
3632 }
3633
3634 static void zsend_error_msg(struct zserv *client, enum zebra_error_types error,
3635 struct zmsghdr *bad_hdr)
3636 {
3637
3638 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
3639
3640 zclient_create_header(s, ZEBRA_ERROR, bad_hdr->vrf_id);
3641
3642 zserv_encode_error(s, error);
3643
3644 client->error_cnt++;
3645 zserv_send_message(client, s);
3646 }
3647
3648 static void zserv_error_no_vrf(ZAPI_HANDLER_ARGS)
3649 {
3650 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
3651 zlog_debug("ZAPI message specifies unknown VRF: %d",
3652 hdr->vrf_id);
3653
3654 zsend_error_msg(client, ZEBRA_NO_VRF, hdr);
3655 }
3656
3657 static void zserv_error_invalid_msg_type(ZAPI_HANDLER_ARGS)
3658 {
3659 zlog_info("Zebra received unknown command %d", hdr->command);
3660
3661 zsend_error_msg(client, ZEBRA_INVALID_MSG_TYPE, hdr);
3662 }
3663
3664 void (*const zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
3665 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
3666 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
3667 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
3668 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
3669 [ZEBRA_INTERFACE_SET_PROTODOWN] = zread_interface_set_protodown,
3670 [ZEBRA_ROUTE_ADD] = zread_route_add,
3671 [ZEBRA_ROUTE_DELETE] = zread_route_del,
3672 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
3673 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
3674 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
3675 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
3676 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
3677 [ZEBRA_HELLO] = zread_hello,
3678 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
3679 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
3680 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
3681 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
3682 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
3683 #if HAVE_BFDD > 0
3684 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
3685 #endif /* HAVE_BFDD */
3686 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
3687 [ZEBRA_VRF_LABEL] = zread_vrf_label,
3688 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
3689 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
3690 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
3691 [ZEBRA_SR_POLICY_SET] = zread_sr_policy_set,
3692 [ZEBRA_SR_POLICY_DELETE] = zread_sr_policy_delete,
3693 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels_add,
3694 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels_delete,
3695 [ZEBRA_MPLS_LABELS_REPLACE] = zread_mpls_labels_replace,
3696 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
3697 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
3698 [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request,
3699 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
3700 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
3701 [ZEBRA_FEC_REGISTER] = zread_fec_register,
3702 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
3703 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
3704 [ZEBRA_ADVERTISE_SVI_MACIP] = zebra_vxlan_advertise_svi_macip,
3705 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
3706 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
3707 [ZEBRA_REMOTE_ES_VTEP_ADD] = zebra_evpn_proc_remote_es,
3708 [ZEBRA_REMOTE_ES_VTEP_DEL] = zebra_evpn_proc_remote_es,
3709 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add_zapi,
3710 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del_zapi,
3711 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
3712 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
3713 [ZEBRA_DUPLICATE_ADDR_DETECTION] = zebra_vxlan_dup_addr_detection,
3714 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
3715 [ZEBRA_PW_ADD] = zread_pseudowire,
3716 [ZEBRA_PW_DELETE] = zread_pseudowire,
3717 [ZEBRA_PW_SET] = zread_pseudowire,
3718 [ZEBRA_PW_UNSET] = zread_pseudowire,
3719 [ZEBRA_RULE_ADD] = zread_rule,
3720 [ZEBRA_RULE_DELETE] = zread_rule,
3721 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
3722 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
3723 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
3724 [ZEBRA_IPSET_CREATE] = zread_ipset,
3725 [ZEBRA_IPSET_DESTROY] = zread_ipset,
3726 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
3727 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
3728 [ZEBRA_IPTABLE_ADD] = zread_iptable,
3729 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
3730 [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control,
3731 [ZEBRA_VXLAN_SG_REPLAY] = zebra_vxlan_sg_replay,
3732 [ZEBRA_MLAG_CLIENT_REGISTER] = zebra_mlag_client_register,
3733 [ZEBRA_MLAG_CLIENT_UNREGISTER] = zebra_mlag_client_unregister,
3734 [ZEBRA_MLAG_FORWARD_MSG] = zebra_mlag_forward_client_msg,
3735 [ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK] = zread_srv6_manager_request,
3736 [ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK] = zread_srv6_manager_request,
3737 [ZEBRA_CLIENT_CAPABILITIES] = zread_client_capabilities,
3738 [ZEBRA_NEIGH_DISCOVER] = zread_neigh_discover,
3739 [ZEBRA_NHG_ADD] = zread_nhg_add,
3740 [ZEBRA_NHG_DEL] = zread_nhg_del,
3741 [ZEBRA_ROUTE_NOTIFY_REQUEST] = zread_route_notify_request,
3742 [ZEBRA_EVPN_REMOTE_NH_ADD] = zebra_evpn_proc_remote_nh,
3743 [ZEBRA_EVPN_REMOTE_NH_DEL] = zebra_evpn_proc_remote_nh,
3744 [ZEBRA_NEIGH_IP_ADD] = zebra_neigh_ip_add,
3745 [ZEBRA_NEIGH_IP_DEL] = zebra_neigh_ip_del,
3746 [ZEBRA_NHRP_NEIGH_REGISTER] = zebra_neigh_register,
3747 [ZEBRA_NHRP_NEIGH_UNREGISTER] = zebra_neigh_unregister,
3748 [ZEBRA_CONFIGURE_ARP] = zebra_configure_arp,
3749 [ZEBRA_GRE_GET] = zebra_gre_get,
3750 [ZEBRA_GRE_SOURCE_SET] = zebra_gre_source_set,
3751 };
3752
3753 /*
3754 * Process a batch of zapi messages.
3755 */
3756 void zserv_handle_commands(struct zserv *client, struct stream_fifo *fifo)
3757 {
3758 struct zmsghdr hdr;
3759 struct zebra_vrf *zvrf;
3760 struct stream *msg;
3761 struct stream_fifo temp_fifo;
3762
3763 stream_fifo_init(&temp_fifo);
3764
3765 while (stream_fifo_head(fifo)) {
3766 msg = stream_fifo_pop(fifo);
3767
3768 if (STREAM_READABLE(msg) > ZEBRA_MAX_PACKET_SIZ) {
3769 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
3770 zlog_debug(
3771 "ZAPI message is %zu bytes long but the maximum packet size is %u; dropping",
3772 STREAM_READABLE(msg),
3773 ZEBRA_MAX_PACKET_SIZ);
3774 goto continue_loop;
3775 }
3776
3777 zapi_parse_header(msg, &hdr);
3778
3779 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV
3780 && IS_ZEBRA_DEBUG_DETAIL)
3781 zserv_log_message(NULL, msg, &hdr);
3782
3783 hdr.length -= ZEBRA_HEADER_SIZE;
3784
3785 /* Before checking for a handler function, check for
3786 * special messages that are handled in another module;
3787 * we'll treat these as opaque.
3788 */
3789 if (zebra_opaque_handles_msgid(hdr.command)) {
3790 /* Reset message buffer */
3791 stream_set_getp(msg, 0);
3792
3793 stream_fifo_push(&temp_fifo, msg);
3794
3795 /* Continue without freeing the message */
3796 msg = NULL;
3797 goto continue_loop;
3798 }
3799
3800 /* lookup vrf */
3801 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
3802 if (!zvrf) {
3803 zserv_error_no_vrf(client, &hdr, msg, zvrf);
3804 goto continue_loop;
3805 }
3806
3807 if (hdr.command >= array_size(zserv_handlers)
3808 || zserv_handlers[hdr.command] == NULL) {
3809 zserv_error_invalid_msg_type(client, &hdr, msg, zvrf);
3810 goto continue_loop;
3811 }
3812
3813 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
3814
3815 continue_loop:
3816 stream_free(msg);
3817 }
3818
3819 /* Dispatch any special messages from the temp fifo */
3820 if (stream_fifo_head(&temp_fifo) != NULL)
3821 zebra_opaque_enqueue_batch(&temp_fifo);
3822
3823 stream_fifo_deinit(&temp_fifo);
3824 }
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