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Merge pull request #4635 from AnuradhaKaruppiah/evpn-pim-replay
[mirror_frr.git] / zebra / zapi_msg.c
1 /*
2 * Zebra API message creation & consumption.
3 * Portions:
4 * Copyright (C) 1997-1999 Kunihiro Ishiguro
5 * Copyright (C) 2015-2018 Cumulus Networks, Inc.
6 * et al.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; see the file COPYING; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <zebra.h>
24 #include <libgen.h>
25
26 #include "lib/prefix.h"
27 #include "lib/command.h"
28 #include "lib/if.h"
29 #include "lib/thread.h"
30 #include "lib/stream.h"
31 #include "lib/memory.h"
32 #include "lib/table.h"
33 #include "lib/network.h"
34 #include "lib/sockunion.h"
35 #include "lib/log.h"
36 #include "lib/zclient.h"
37 #include "lib/privs.h"
38 #include "lib/network.h"
39 #include "lib/buffer.h"
40 #include "lib/nexthop.h"
41 #include "lib/vrf.h"
42 #include "lib/libfrr.h"
43 #include "lib/sockopt.h"
44
45 #include "zebra/zebra_router.h"
46 #include "zebra/rib.h"
47 #include "zebra/zebra_memory.h"
48 #include "zebra/zebra_ns.h"
49 #include "zebra/zebra_vrf.h"
50 #include "zebra/router-id.h"
51 #include "zebra/redistribute.h"
52 #include "zebra/debug.h"
53 #include "zebra/zebra_rnh.h"
54 #include "zebra/rt_netlink.h"
55 #include "zebra/interface.h"
56 #include "zebra/zebra_ptm.h"
57 #include "zebra/rtadv.h"
58 #include "zebra/zebra_mpls.h"
59 #include "zebra/zebra_mroute.h"
60 #include "zebra/zebra_vxlan.h"
61 #include "zebra/rt.h"
62 #include "zebra/zebra_pbr.h"
63 #include "zebra/table_manager.h"
64 #include "zebra/zapi_msg.h"
65 #include "zebra/zebra_errors.h"
66 #include "zebra/zebra_mlag.h"
67
68 /* Encoding helpers -------------------------------------------------------- */
69
70 static void zserv_encode_interface(struct stream *s, struct interface *ifp)
71 {
72 /* Interface information. */
73 struct zebra_if *zif = ifp->info;
74
75 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
76 stream_putl(s, ifp->ifindex);
77 stream_putc(s, ifp->status);
78 stream_putq(s, ifp->flags);
79 stream_putc(s, ifp->ptm_enable);
80 stream_putc(s, ifp->ptm_status);
81 stream_putl(s, ifp->metric);
82 stream_putl(s, ifp->speed);
83 stream_putl(s, ifp->mtu);
84 stream_putl(s, ifp->mtu6);
85 stream_putl(s, ifp->bandwidth);
86 stream_putl(s, zif->link_ifindex);
87 stream_putl(s, ifp->ll_type);
88 stream_putl(s, ifp->hw_addr_len);
89 if (ifp->hw_addr_len)
90 stream_put(s, ifp->hw_addr, ifp->hw_addr_len);
91
92 /* Then, Traffic Engineering parameters if any */
93 if (HAS_LINK_PARAMS(ifp) && IS_LINK_PARAMS_SET(ifp->link_params)) {
94 stream_putc(s, 1);
95 zebra_interface_link_params_write(s, ifp);
96 } else
97 stream_putc(s, 0);
98
99 /* Write packet size. */
100 stream_putw_at(s, 0, stream_get_endp(s));
101 }
102
103 static void zserv_encode_vrf(struct stream *s, struct zebra_vrf *zvrf)
104 {
105 struct vrf_data data;
106 const char *netns_name = zvrf_ns_name(zvrf);
107
108 data.l.table_id = zvrf->table_id;
109
110 if (netns_name)
111 strlcpy(data.l.netns_name, basename((char *)netns_name),
112 NS_NAMSIZ);
113 else
114 memset(data.l.netns_name, 0, NS_NAMSIZ);
115 /* Pass the tableid and the netns NAME */
116 stream_put(s, &data, sizeof(struct vrf_data));
117 /* Interface information. */
118 stream_put(s, zvrf_name(zvrf), VRF_NAMSIZ);
119 /* Write packet size. */
120 stream_putw_at(s, 0, stream_get_endp(s));
121 }
122
123 static int zserv_encode_nexthop(struct stream *s, struct nexthop *nexthop)
124 {
125 stream_putl(s, nexthop->vrf_id);
126 stream_putc(s, nexthop->type);
127 switch (nexthop->type) {
128 case NEXTHOP_TYPE_IPV4:
129 case NEXTHOP_TYPE_IPV4_IFINDEX:
130 stream_put_in_addr(s, &nexthop->gate.ipv4);
131 stream_putl(s, nexthop->ifindex);
132 break;
133 case NEXTHOP_TYPE_IPV6:
134 stream_put(s, &nexthop->gate.ipv6, 16);
135 break;
136 case NEXTHOP_TYPE_IPV6_IFINDEX:
137 stream_put(s, &nexthop->gate.ipv6, 16);
138 stream_putl(s, nexthop->ifindex);
139 break;
140 case NEXTHOP_TYPE_IFINDEX:
141 stream_putl(s, nexthop->ifindex);
142 break;
143 default:
144 /* do nothing */
145 break;
146 }
147 return 1;
148 }
149
150 /* Send handlers ----------------------------------------------------------- */
151
152 /* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
153 /*
154 * This function is called in the following situations:
155 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
156 * from the client.
157 * - at startup, when zebra figures out the available interfaces
158 * - when an interface is added (where support for
159 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
160 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
161 * received)
162 */
163 int zsend_interface_add(struct zserv *client, struct interface *ifp)
164 {
165 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
166
167 zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf_id);
168 zserv_encode_interface(s, ifp);
169
170 client->ifadd_cnt++;
171 return zserv_send_message(client, s);
172 }
173
174 /* Interface deletion from zebra daemon. */
175 int zsend_interface_delete(struct zserv *client, struct interface *ifp)
176 {
177 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
178
179 zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf_id);
180 zserv_encode_interface(s, ifp);
181
182 client->ifdel_cnt++;
183 return zserv_send_message(client, s);
184 }
185
186 int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf)
187 {
188 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
189
190 zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf));
191 zserv_encode_vrf(s, zvrf);
192
193 client->vrfadd_cnt++;
194 return zserv_send_message(client, s);
195 }
196
197 /* VRF deletion from zebra daemon. */
198 int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf)
199
200 {
201 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
202
203 zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf));
204 zserv_encode_vrf(s, zvrf);
205
206 client->vrfdel_cnt++;
207 return zserv_send_message(client, s);
208 }
209
210 int zsend_interface_link_params(struct zserv *client, struct interface *ifp)
211 {
212 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
213
214 if (!ifp->link_params) {
215 stream_free(s);
216 return 0;
217 }
218
219 zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->vrf_id);
220
221 /* Add Interface Index */
222 stream_putl(s, ifp->ifindex);
223
224 /* Then TE Link Parameters */
225 if (zebra_interface_link_params_write(s, ifp) == 0) {
226 stream_free(s);
227 return 0;
228 }
229
230 /* Write packet size. */
231 stream_putw_at(s, 0, stream_get_endp(s));
232
233 return zserv_send_message(client, s);
234 }
235
236 /* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or
237 * ZEBRA_INTERFACE_ADDRESS_DELETE to the client.
238 *
239 * A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations:
240 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
241 * from the client, after the ZEBRA_INTERFACE_ADD has been
242 * sent from zebra to the client
243 * - redistribute new address info to all clients in the following situations
244 * - at startup, when zebra figures out the available interfaces
245 * - when an interface is added (where support for
246 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
247 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
248 * received)
249 * - for the vty commands "ip address A.B.C.D/M [<label LINE>]"
250 * and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M"
251 * - when an RTM_NEWADDR message is received from the kernel,
252 *
253 * The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE:
254 *
255 * zsend_interface_address(DELETE)
256 * ^
257 * |
258 * zebra_interface_address_delete_update
259 * ^ ^ ^
260 * | | if_delete_update
261 * | |
262 * ip_address_uninstall connected_delete_ipv4
263 * [ipv6_addresss_uninstall] [connected_delete_ipv6]
264 * ^ ^
265 * | |
266 * | RTM_NEWADDR on routing/netlink socket
267 * |
268 * vty commands:
269 * "no ip address A.B.C.D/M [label LINE]"
270 * "no ip address A.B.C.D/M"
271 * ["no ipv6 address X:X::X:X/M"]
272 *
273 */
274 int zsend_interface_address(int cmd, struct zserv *client,
275 struct interface *ifp, struct connected *ifc)
276 {
277 int blen;
278 struct prefix *p;
279 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
280
281 zclient_create_header(s, cmd, ifp->vrf_id);
282 stream_putl(s, ifp->ifindex);
283
284 /* Interface address flag. */
285 stream_putc(s, ifc->flags);
286
287 /* Prefix information. */
288 p = ifc->address;
289 stream_putc(s, p->family);
290 blen = prefix_blen(p);
291 stream_put(s, &p->u.prefix, blen);
292
293 /*
294 * XXX gnu version does not send prefixlen for
295 * ZEBRA_INTERFACE_ADDRESS_DELETE
296 * but zebra_interface_address_delete_read() in the gnu version
297 * expects to find it
298 */
299 stream_putc(s, p->prefixlen);
300
301 /* Destination. */
302 p = ifc->destination;
303 if (p)
304 stream_put(s, &p->u.prefix, blen);
305 else
306 stream_put(s, NULL, blen);
307
308 /* Write packet size. */
309 stream_putw_at(s, 0, stream_get_endp(s));
310
311 client->connected_rt_add_cnt++;
312 return zserv_send_message(client, s);
313 }
314
315 static int zsend_interface_nbr_address(int cmd, struct zserv *client,
316 struct interface *ifp,
317 struct nbr_connected *ifc)
318 {
319 int blen;
320 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
321 struct prefix *p;
322
323 zclient_create_header(s, cmd, ifp->vrf_id);
324 stream_putl(s, ifp->ifindex);
325
326 /* Prefix information. */
327 p = ifc->address;
328 stream_putc(s, p->family);
329 blen = prefix_blen(p);
330 stream_put(s, &p->u.prefix, blen);
331
332 /*
333 * XXX gnu version does not send prefixlen for
334 * ZEBRA_INTERFACE_ADDRESS_DELETE
335 * but zebra_interface_address_delete_read() in the gnu version
336 * expects to find it
337 */
338 stream_putc(s, p->prefixlen);
339
340 /* Write packet size. */
341 stream_putw_at(s, 0, stream_get_endp(s));
342
343 return zserv_send_message(client, s);
344 }
345
346 /* Interface address addition. */
347 static void zebra_interface_nbr_address_add_update(struct interface *ifp,
348 struct nbr_connected *ifc)
349 {
350 struct listnode *node, *nnode;
351 struct zserv *client;
352 struct prefix *p;
353
354 if (IS_ZEBRA_DEBUG_EVENT) {
355 char buf[INET6_ADDRSTRLEN];
356
357 p = ifc->address;
358 zlog_debug(
359 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_ADD %s/%d on %s",
360 inet_ntop(p->family, &p->u.prefix, buf,
361 INET6_ADDRSTRLEN),
362 p->prefixlen, ifc->ifp->name);
363 }
364
365 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client))
366 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
367 client, ifp, ifc);
368 }
369
370 /* Interface address deletion. */
371 static void zebra_interface_nbr_address_delete_update(struct interface *ifp,
372 struct nbr_connected *ifc)
373 {
374 struct listnode *node, *nnode;
375 struct zserv *client;
376 struct prefix *p;
377
378 if (IS_ZEBRA_DEBUG_EVENT) {
379 char buf[INET6_ADDRSTRLEN];
380
381 p = ifc->address;
382 zlog_debug(
383 "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_DELETE %s/%d on %s",
384 inet_ntop(p->family, &p->u.prefix, buf,
385 INET6_ADDRSTRLEN),
386 p->prefixlen, ifc->ifp->name);
387 }
388
389 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client))
390 zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE,
391 client, ifp, ifc);
392 }
393
394 /* Send addresses on interface to client */
395 int zsend_interface_addresses(struct zserv *client, struct interface *ifp)
396 {
397 struct listnode *cnode, *cnnode;
398 struct connected *c;
399 struct nbr_connected *nc;
400
401 /* Send interface addresses. */
402 for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode, c)) {
403 if (!CHECK_FLAG(c->conf, ZEBRA_IFC_REAL))
404 continue;
405
406 if (zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD, client,
407 ifp, c)
408 < 0)
409 return -1;
410 }
411
412 /* Send interface neighbors. */
413 for (ALL_LIST_ELEMENTS(ifp->nbr_connected, cnode, cnnode, nc)) {
414 if (zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD,
415 client, ifp, nc)
416 < 0)
417 return -1;
418 }
419
420 return 0;
421 }
422
423 /* Notify client about interface moving from one VRF to another.
424 * Whether client is interested in old and new VRF is checked by caller.
425 */
426 int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
427 vrf_id_t vrf_id)
428 {
429 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
430
431 zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf_id);
432
433 /* Fill in the name of the interface and its new VRF (id) */
434 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
435 stream_putl(s, vrf_id);
436
437 /* Write packet size. */
438 stream_putw_at(s, 0, stream_get_endp(s));
439
440 client->if_vrfchg_cnt++;
441 return zserv_send_message(client, s);
442 }
443
444 /* Add new nbr connected IPv6 address */
445 void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address)
446 {
447 struct nbr_connected *ifc;
448 struct prefix p;
449
450 p.family = AF_INET6;
451 IPV6_ADDR_COPY(&p.u.prefix6, address);
452 p.prefixlen = IPV6_MAX_PREFIXLEN;
453
454 ifc = listnode_head(ifp->nbr_connected);
455 if (!ifc) {
456 /* new addition */
457 ifc = nbr_connected_new();
458 ifc->address = prefix_new();
459 ifc->ifp = ifp;
460 listnode_add(ifp->nbr_connected, ifc);
461 }
462
463 prefix_copy(ifc->address, &p);
464
465 zebra_interface_nbr_address_add_update(ifp, ifc);
466
467 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 1);
468 }
469
470 void nbr_connected_delete_ipv6(struct interface *ifp, struct in6_addr *address)
471 {
472 struct nbr_connected *ifc;
473 struct prefix p;
474
475 p.family = AF_INET6;
476 IPV6_ADDR_COPY(&p.u.prefix6, address);
477 p.prefixlen = IPV6_MAX_PREFIXLEN;
478
479 ifc = nbr_connected_check(ifp, &p);
480 if (!ifc)
481 return;
482
483 listnode_delete(ifp->nbr_connected, ifc);
484
485 zebra_interface_nbr_address_delete_update(ifp, ifc);
486
487 if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 0);
488
489 nbr_connected_free(ifc);
490 }
491
492 /*
493 * The cmd passed to zsend_interface_update may be ZEBRA_INTERFACE_UP or
494 * ZEBRA_INTERFACE_DOWN.
495 *
496 * The ZEBRA_INTERFACE_UP message is sent from the zebra server to
497 * the clients in one of 2 situations:
498 * - an if_up is detected e.g., as a result of an RTM_IFINFO message
499 * - a vty command modifying the bandwidth of an interface is received.
500 * The ZEBRA_INTERFACE_DOWN message is sent when an if_down is detected.
501 */
502 int zsend_interface_update(int cmd, struct zserv *client, struct interface *ifp)
503 {
504 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
505
506 zclient_create_header(s, cmd, ifp->vrf_id);
507 zserv_encode_interface(s, ifp);
508
509 if (cmd == ZEBRA_INTERFACE_UP)
510 client->ifup_cnt++;
511 else
512 client->ifdown_cnt++;
513
514 return zserv_send_message(client, s);
515 }
516
517 int zsend_redistribute_route(int cmd, struct zserv *client,
518 const struct prefix *p,
519 const struct prefix *src_p, struct route_entry *re)
520 {
521 struct zapi_route api;
522 struct zapi_nexthop *api_nh;
523 struct nexthop *nexthop;
524 int count = 0;
525 afi_t afi;
526 size_t stream_size =
527 MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route));
528
529 memset(&api, 0, sizeof(api));
530 api.vrf_id = re->vrf_id;
531 api.type = re->type;
532 api.safi = SAFI_UNICAST;
533 api.instance = re->instance;
534 api.flags = re->flags;
535
536 afi = family2afi(p->family);
537 switch (afi) {
538 case AFI_IP:
539 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
540 client->redist_v4_add_cnt++;
541 else
542 client->redist_v4_del_cnt++;
543 break;
544 case AFI_IP6:
545 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
546 client->redist_v6_add_cnt++;
547 else
548 client->redist_v6_del_cnt++;
549 break;
550 default:
551 break;
552 }
553
554 /* Prefix. */
555 api.prefix = *p;
556 if (src_p) {
557 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
558 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
559 }
560
561 /* Nexthops. */
562 if (re->nexthop_active_num) {
563 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
564 api.nexthop_num = re->nexthop_active_num;
565 }
566 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) {
567 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
568 continue;
569
570 api_nh = &api.nexthops[count];
571 api_nh->vrf_id = nexthop->vrf_id;
572 api_nh->type = nexthop->type;
573 switch (nexthop->type) {
574 case NEXTHOP_TYPE_BLACKHOLE:
575 api_nh->bh_type = nexthop->bh_type;
576 break;
577 case NEXTHOP_TYPE_IPV4:
578 api_nh->gate.ipv4 = nexthop->gate.ipv4;
579 break;
580 case NEXTHOP_TYPE_IPV4_IFINDEX:
581 api_nh->gate.ipv4 = nexthop->gate.ipv4;
582 api_nh->ifindex = nexthop->ifindex;
583 break;
584 case NEXTHOP_TYPE_IFINDEX:
585 api_nh->ifindex = nexthop->ifindex;
586 break;
587 case NEXTHOP_TYPE_IPV6:
588 api_nh->gate.ipv6 = nexthop->gate.ipv6;
589 break;
590 case NEXTHOP_TYPE_IPV6_IFINDEX:
591 api_nh->gate.ipv6 = nexthop->gate.ipv6;
592 api_nh->ifindex = nexthop->ifindex;
593 }
594 count++;
595 }
596
597 /* Attributes. */
598 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
599 api.distance = re->distance;
600 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
601 api.metric = re->metric;
602 if (re->tag) {
603 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
604 api.tag = re->tag;
605 }
606 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
607 api.mtu = re->mtu;
608
609 struct stream *s = stream_new(stream_size);
610
611 /* Encode route and send. */
612 if (zapi_route_encode(cmd, s, &api) < 0) {
613 stream_free(s);
614 return -1;
615 }
616
617 if (IS_ZEBRA_DEBUG_SEND) {
618 char buf_prefix[PREFIX_STRLEN];
619
620 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
621
622 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
623 __func__, zserv_command_string(cmd),
624 zebra_route_string(client->proto),
625 zebra_route_string(api.type), api.vrf_id,
626 buf_prefix);
627 }
628 return zserv_send_message(client, s);
629 }
630
631 /*
632 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
633 * nexthop is not found on mrib. Returns both route metric and protocol
634 * distance.
635 */
636 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
637 struct in_addr addr,
638 struct route_entry *re,
639 struct zebra_vrf *zvrf)
640 {
641 struct stream *s;
642 unsigned long nump;
643 uint8_t num;
644 struct nexthop *nexthop;
645
646 /* Get output stream. */
647 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
648 stream_reset(s);
649
650 /* Fill in result. */
651 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
652 stream_put_in_addr(s, &addr);
653
654 if (re) {
655 stream_putc(s, re->distance);
656 stream_putl(s, re->metric);
657 num = 0;
658 /* remember position for nexthop_num */
659 nump = stream_get_endp(s);
660 /* reserve room for nexthop_num */
661 stream_putc(s, 0);
662 /*
663 * Only non-recursive routes are elegible to resolve the
664 * nexthop we are looking up. Therefore, we will just iterate
665 * over the top chain of nexthops.
666 */
667 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next)
668 if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
669 num += zserv_encode_nexthop(s, nexthop);
670
671 /* store nexthop_num */
672 stream_putc_at(s, nump, num);
673 } else {
674 stream_putc(s, 0); /* distance */
675 stream_putl(s, 0); /* metric */
676 stream_putc(s, 0); /* nexthop_num */
677 }
678
679 stream_putw_at(s, 0, stream_get_endp(s));
680
681 return zserv_send_message(client, s);
682 }
683
684 /*
685 * Common utility send route notification, called from a path using a
686 * route_entry and from a path using a dataplane context.
687 */
688 static int route_notify_internal(const struct prefix *p, int type,
689 uint16_t instance, vrf_id_t vrf_id,
690 uint32_t table_id,
691 enum zapi_route_notify_owner note)
692 {
693 struct zserv *client;
694 struct stream *s;
695 uint8_t blen;
696
697 client = zserv_find_client(type, instance);
698 if (!client || !client->notify_owner) {
699 if (IS_ZEBRA_DEBUG_PACKET) {
700 char buff[PREFIX_STRLEN];
701
702 zlog_debug(
703 "Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
704 type, prefix2str(p, buff, sizeof(buff)),
705 table_id, note, vrf_id);
706 }
707 return 0;
708 }
709
710 if (IS_ZEBRA_DEBUG_PACKET) {
711 char buff[PREFIX_STRLEN];
712
713 zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
714 type, prefix2str(p, buff, sizeof(buff)),
715 table_id, note, vrf_id);
716 }
717
718 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
719 stream_reset(s);
720
721 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
722
723 stream_put(s, &note, sizeof(note));
724
725 stream_putc(s, p->family);
726
727 blen = prefix_blen(p);
728 stream_putc(s, p->prefixlen);
729 stream_put(s, &p->u.prefix, blen);
730
731 stream_putl(s, table_id);
732
733 stream_putw_at(s, 0, stream_get_endp(s));
734
735 return zserv_send_message(client, s);
736 }
737
738 int zsend_route_notify_owner(struct route_entry *re, const struct prefix *p,
739 enum zapi_route_notify_owner note)
740 {
741 return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
742 re->table, note));
743 }
744
745 /*
746 * Route-owner notification using info from dataplane update context.
747 */
748 int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx,
749 enum zapi_route_notify_owner note)
750 {
751 return (route_notify_internal(dplane_ctx_get_dest(ctx),
752 dplane_ctx_get_type(ctx),
753 dplane_ctx_get_instance(ctx),
754 dplane_ctx_get_vrf(ctx),
755 dplane_ctx_get_table(ctx),
756 note));
757 }
758
759 void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
760 enum zapi_rule_notify_owner note)
761 {
762 struct listnode *node;
763 struct zserv *client;
764 struct stream *s;
765
766 if (IS_ZEBRA_DEBUG_PACKET)
767 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
768 rule->rule.unique);
769
770 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
771 if (rule->sock == client->sock)
772 break;
773 }
774
775 if (!client)
776 return;
777
778 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
779
780 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
781 stream_put(s, &note, sizeof(note));
782 stream_putl(s, rule->rule.seq);
783 stream_putl(s, rule->rule.priority);
784 stream_putl(s, rule->rule.unique);
785 if (rule->ifp)
786 stream_putl(s, rule->ifp->ifindex);
787 else
788 stream_putl(s, 0);
789
790 stream_putw_at(s, 0, stream_get_endp(s));
791
792 zserv_send_message(client, s);
793 }
794
795 void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
796 enum zapi_ipset_notify_owner note)
797 {
798 struct listnode *node;
799 struct zserv *client;
800 struct stream *s;
801
802 if (IS_ZEBRA_DEBUG_PACKET)
803 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
804 ipset->unique);
805
806 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
807 if (ipset->sock == client->sock)
808 break;
809 }
810
811 if (!client)
812 return;
813
814 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
815
816 zclient_create_header(s, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
817 stream_put(s, &note, sizeof(note));
818 stream_putl(s, ipset->unique);
819 stream_put(s, ipset->ipset_name, ZEBRA_IPSET_NAME_SIZE);
820 stream_putw_at(s, 0, stream_get_endp(s));
821
822 zserv_send_message(client, s);
823 }
824
825 void zsend_ipset_entry_notify_owner(struct zebra_pbr_ipset_entry *ipset,
826 enum zapi_ipset_entry_notify_owner note)
827 {
828 struct listnode *node;
829 struct zserv *client;
830 struct stream *s;
831
832 if (IS_ZEBRA_DEBUG_PACKET)
833 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
834 ipset->unique);
835
836 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
837 if (ipset->sock == client->sock)
838 break;
839 }
840
841 if (!client)
842 return;
843
844 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
845
846 zclient_create_header(s, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
847 stream_put(s, &note, sizeof(note));
848 stream_putl(s, ipset->unique);
849 stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
850 stream_putw_at(s, 0, stream_get_endp(s));
851
852 zserv_send_message(client, s);
853 }
854
855 void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
856 enum zapi_iptable_notify_owner note)
857 {
858 struct listnode *node;
859 struct zserv *client;
860 struct stream *s;
861
862 if (IS_ZEBRA_DEBUG_PACKET)
863 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
864 iptable->unique);
865
866 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
867 if (iptable->sock == client->sock)
868 break;
869 }
870
871 if (!client)
872 return;
873
874 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
875
876 zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
877 stream_put(s, &note, sizeof(note));
878 stream_putl(s, iptable->unique);
879 stream_putw_at(s, 0, stream_get_endp(s));
880
881 zserv_send_message(client, s);
882 }
883
884 /* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
885 int zsend_router_id_update(struct zserv *client, struct prefix *p,
886 vrf_id_t vrf_id)
887 {
888 int blen;
889
890 /* Check this client need interface information. */
891 if (!vrf_bitmap_check(client->ridinfo, vrf_id))
892 return 0;
893
894 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
895
896 /* Message type. */
897 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
898
899 /* Prefix information. */
900 stream_putc(s, p->family);
901 blen = prefix_blen(p);
902 stream_put(s, &p->u.prefix, blen);
903 stream_putc(s, p->prefixlen);
904
905 /* Write packet size. */
906 stream_putw_at(s, 0, stream_get_endp(s));
907
908 return zserv_send_message(client, s);
909 }
910
911 /*
912 * Function used by Zebra to send a PW status update to LDP daemon
913 */
914 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
915 {
916 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
917
918 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
919 stream_write(s, pw->ifname, IF_NAMESIZE);
920 stream_putl(s, pw->ifindex);
921 stream_putl(s, pw->status);
922
923 /* Put length at the first point of the stream. */
924 stream_putw_at(s, 0, stream_get_endp(s));
925
926 return zserv_send_message(client, s);
927 }
928
929 /* Send response to a get label chunk request to client */
930 int zsend_assign_label_chunk_response(struct zserv *client, vrf_id_t vrf_id,
931 uint8_t proto, uint16_t instance,
932 struct label_manager_chunk *lmc)
933 {
934 int ret;
935 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
936
937 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
938 /* proto */
939 stream_putc(s, proto);
940 /* instance */
941 stream_putw(s, instance);
942
943 if (lmc) {
944 /* keep */
945 stream_putc(s, lmc->keep);
946 /* start and end labels */
947 stream_putl(s, lmc->start);
948 stream_putl(s, lmc->end);
949 }
950
951 /* Write packet size. */
952 stream_putw_at(s, 0, stream_get_endp(s));
953
954 ret = writen(client->sock, s->data, stream_get_endp(s));
955 stream_free(s);
956 return ret;
957 }
958
959 /* Send response to a label manager connect request to client */
960 int zsend_label_manager_connect_response(struct zserv *client, vrf_id_t vrf_id,
961 unsigned short result)
962 {
963 int ret;
964 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
965
966 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
967
968 /* proto */
969 stream_putc(s, client->proto);
970
971 /* instance */
972 stream_putw(s, client->instance);
973
974 /* result */
975 stream_putc(s, result);
976
977 /* Write packet size. */
978 stream_putw_at(s, 0, stream_get_endp(s));
979
980 ret = writen(client->sock, s->data, stream_get_endp(s));
981 stream_free(s);
982
983 return ret;
984 }
985
986 /* Send response to a get table chunk request to client */
987 static int zsend_assign_table_chunk_response(struct zserv *client,
988 vrf_id_t vrf_id,
989 struct table_manager_chunk *tmc)
990 {
991 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
992
993 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
994
995 if (tmc) {
996 /* start and end labels */
997 stream_putl(s, tmc->start);
998 stream_putl(s, tmc->end);
999 }
1000
1001 /* Write packet size. */
1002 stream_putw_at(s, 0, stream_get_endp(s));
1003
1004 return zserv_send_message(client, s);
1005 }
1006
1007 static int zsend_table_manager_connect_response(struct zserv *client,
1008 vrf_id_t vrf_id,
1009 uint16_t result)
1010 {
1011 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1012
1013 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
1014
1015 /* result */
1016 stream_putc(s, result);
1017
1018 stream_putw_at(s, 0, stream_get_endp(s));
1019
1020 return zserv_send_message(client, s);
1021 }
1022
1023 /* Inbound message handling ------------------------------------------------ */
1024
1025 int cmd2type[] = {
1026 [ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
1027 [ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
1028 [ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
1029 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
1030 };
1031
1032 /* Nexthop register */
1033 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1034 {
1035 struct rnh *rnh;
1036 struct stream *s;
1037 struct prefix p;
1038 unsigned short l = 0;
1039 uint8_t flags = 0;
1040 uint16_t type = cmd2type[hdr->command];
1041 bool exist;
1042 bool flag_changed = false;
1043 uint8_t orig_flags;
1044
1045 if (IS_ZEBRA_DEBUG_NHT)
1046 zlog_debug(
1047 "rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
1048 zebra_route_string(client->proto), hdr->length,
1049 (type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
1050 zvrf->vrf->vrf_id);
1051
1052 s = msg;
1053
1054 client->nh_reg_time = monotime(NULL);
1055
1056 while (l < hdr->length) {
1057 STREAM_GETC(s, flags);
1058 STREAM_GETW(s, p.family);
1059 STREAM_GETC(s, p.prefixlen);
1060 l += 4;
1061 if (p.family == AF_INET) {
1062 client->v4_nh_watch_add_cnt++;
1063 if (p.prefixlen > IPV4_MAX_BITLEN) {
1064 zlog_debug(
1065 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1066 __PRETTY_FUNCTION__, p.prefixlen);
1067 return;
1068 }
1069 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1070 l += IPV4_MAX_BYTELEN;
1071 } else if (p.family == AF_INET6) {
1072 client->v6_nh_watch_add_cnt++;
1073 if (p.prefixlen > IPV6_MAX_BITLEN) {
1074 zlog_debug(
1075 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1076 __PRETTY_FUNCTION__, p.prefixlen);
1077 return;
1078 }
1079 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1080 l += IPV6_MAX_BYTELEN;
1081 } else {
1082 flog_err(
1083 EC_ZEBRA_UNKNOWN_FAMILY,
1084 "rnh_register: Received unknown family type %d\n",
1085 p.family);
1086 return;
1087 }
1088 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
1089 if (!rnh)
1090 return;
1091
1092 orig_flags = rnh->flags;
1093 if (type == RNH_NEXTHOP_TYPE) {
1094 if (flags
1095 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1096 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1097 else if (!flags
1098 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1099 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1100 } else if (type == RNH_IMPORT_CHECK_TYPE) {
1101 if (flags
1102 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
1103 SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1104 else if (!flags
1105 && CHECK_FLAG(rnh->flags,
1106 ZEBRA_NHT_EXACT_MATCH))
1107 UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1108 }
1109
1110 if (orig_flags != rnh->flags)
1111 flag_changed = true;
1112
1113 /* Anything not AF_INET/INET6 has been filtered out above */
1114 if (!exist || flag_changed)
1115 zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, type,
1116 &p);
1117
1118 zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
1119 }
1120
1121 stream_failure:
1122 return;
1123 }
1124
1125 /* Nexthop register */
1126 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1127 {
1128 struct rnh *rnh;
1129 struct stream *s;
1130 struct prefix p;
1131 unsigned short l = 0;
1132 uint16_t type = cmd2type[hdr->command];
1133
1134 if (IS_ZEBRA_DEBUG_NHT)
1135 zlog_debug(
1136 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
1137 zebra_route_string(client->proto), hdr->length,
1138 zvrf->vrf->vrf_id);
1139
1140 s = msg;
1141
1142 while (l < hdr->length) {
1143 uint8_t flags;
1144
1145 STREAM_GETC(s, flags);
1146 if (flags != 0)
1147 goto stream_failure;
1148
1149 STREAM_GETW(s, p.family);
1150 STREAM_GETC(s, p.prefixlen);
1151 l += 4;
1152 if (p.family == AF_INET) {
1153 client->v4_nh_watch_rem_cnt++;
1154 if (p.prefixlen > IPV4_MAX_BITLEN) {
1155 zlog_debug(
1156 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1157 __PRETTY_FUNCTION__, p.prefixlen);
1158 return;
1159 }
1160 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1161 l += IPV4_MAX_BYTELEN;
1162 } else if (p.family == AF_INET6) {
1163 client->v6_nh_watch_rem_cnt++;
1164 if (p.prefixlen > IPV6_MAX_BITLEN) {
1165 zlog_debug(
1166 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1167 __PRETTY_FUNCTION__, p.prefixlen);
1168 return;
1169 }
1170 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1171 l += IPV6_MAX_BYTELEN;
1172 } else {
1173 flog_err(
1174 EC_ZEBRA_UNKNOWN_FAMILY,
1175 "rnh_register: Received unknown family type %d\n",
1176 p.family);
1177 return;
1178 }
1179 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
1180 if (rnh) {
1181 client->nh_dereg_time = monotime(NULL);
1182 zebra_remove_rnh_client(rnh, client, type);
1183 }
1184 }
1185 stream_failure:
1186 return;
1187 }
1188
1189 #define ZEBRA_MIN_FEC_LENGTH 5
1190
1191 /* FEC register */
1192 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1193 {
1194 struct stream *s;
1195 unsigned short l = 0;
1196 struct prefix p;
1197 uint16_t flags;
1198 uint32_t label = MPLS_INVALID_LABEL;
1199 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1200
1201 s = msg;
1202 zvrf = vrf_info_lookup(VRF_DEFAULT);
1203 if (!zvrf)
1204 return;
1205
1206 /*
1207 * The minimum amount of data that can be sent for one fec
1208 * registration
1209 */
1210 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1211 flog_err(
1212 EC_ZEBRA_IRDP_LEN_MISMATCH,
1213 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1214 hdr->length);
1215 return;
1216 }
1217
1218 while (l < hdr->length) {
1219 STREAM_GETW(s, flags);
1220 memset(&p, 0, sizeof(p));
1221 STREAM_GETW(s, p.family);
1222 if (p.family != AF_INET && p.family != AF_INET6) {
1223 flog_err(
1224 EC_ZEBRA_UNKNOWN_FAMILY,
1225 "fec_register: Received unknown family type %d\n",
1226 p.family);
1227 return;
1228 }
1229 STREAM_GETC(s, p.prefixlen);
1230 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1231 || (p.family == AF_INET6
1232 && p.prefixlen > IPV6_MAX_BITLEN)) {
1233 zlog_debug(
1234 "%s: Specified prefix hdr->length: %d is to long for %d",
1235 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1236 return;
1237 }
1238 l += 5;
1239 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1240 l += PSIZE(p.prefixlen);
1241 if (flags & ZEBRA_FEC_REGISTER_LABEL) {
1242 STREAM_GETL(s, label);
1243 l += 4;
1244 } else if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1245 STREAM_GETL(s, label_index);
1246 l += 4;
1247 }
1248
1249 zebra_mpls_fec_register(zvrf, &p, label, label_index, client);
1250 }
1251
1252 stream_failure:
1253 return;
1254 }
1255
1256 /* FEC unregister */
1257 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1258 {
1259 struct stream *s;
1260 unsigned short l = 0;
1261 struct prefix p;
1262 uint16_t flags;
1263
1264 s = msg;
1265 zvrf = vrf_info_lookup(VRF_DEFAULT);
1266 if (!zvrf)
1267 return;
1268
1269 /*
1270 * The minimum amount of data that can be sent for one
1271 * fec unregistration
1272 */
1273 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1274 flog_err(
1275 EC_ZEBRA_IRDP_LEN_MISMATCH,
1276 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1277 hdr->length);
1278 return;
1279 }
1280
1281 while (l < hdr->length) {
1282 STREAM_GETW(s, flags);
1283 if (flags != 0)
1284 goto stream_failure;
1285
1286 memset(&p, 0, sizeof(p));
1287 STREAM_GETW(s, p.family);
1288 if (p.family != AF_INET && p.family != AF_INET6) {
1289 flog_err(
1290 EC_ZEBRA_UNKNOWN_FAMILY,
1291 "fec_unregister: Received unknown family type %d\n",
1292 p.family);
1293 return;
1294 }
1295 STREAM_GETC(s, p.prefixlen);
1296 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1297 || (p.family == AF_INET6
1298 && p.prefixlen > IPV6_MAX_BITLEN)) {
1299 zlog_debug(
1300 "%s: Received prefix hdr->length %d which is greater than %d can support",
1301 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1302 return;
1303 }
1304 l += 5;
1305 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1306 l += PSIZE(p.prefixlen);
1307 zebra_mpls_fec_unregister(zvrf, &p, client);
1308 }
1309
1310 stream_failure:
1311 return;
1312 }
1313
1314
1315 /*
1316 * Register zebra server interface information.
1317 * Send current all interface and address information.
1318 */
1319 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1320 {
1321 struct vrf *vrf;
1322 struct interface *ifp;
1323
1324 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1325 FOR_ALL_INTERFACES (vrf, ifp) {
1326 /* Skip pseudo interface. */
1327 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1328 continue;
1329
1330 zsend_interface_add(client, ifp);
1331 zsend_interface_link_params(client, ifp);
1332 zsend_interface_addresses(client, ifp);
1333 }
1334 }
1335 }
1336
1337 /* Unregister zebra server interface information. */
1338 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1339 {
1340 }
1341
1342 /*
1343 * Handle message requesting interface be set up or down.
1344 */
1345 static void zread_interface_set_protodown(ZAPI_HANDLER_ARGS)
1346 {
1347 ifindex_t ifindex;
1348 struct interface *ifp;
1349 char down;
1350
1351 STREAM_GETL(msg, ifindex);
1352 STREAM_GETC(msg, down);
1353
1354 /* set ifdown */
1355 ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), ifindex);
1356
1357 if (ifp) {
1358 zlog_info("Setting interface %s (%u): protodown %s", ifp->name,
1359 ifindex, down ? "on" : "off");
1360 zebra_if_set_protodown(ifp, down);
1361 } else {
1362 zlog_warn(
1363 "Cannot set protodown %s for interface %u; does not exist",
1364 down ? "on" : "off", ifindex);
1365 }
1366
1367
1368 stream_failure:
1369 return;
1370 }
1371
1372
1373 void zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1374 const unsigned int nexthop_num)
1375 {
1376 if (nexthop_num > zrouter.multipath_num) {
1377 char buff[PREFIX2STR_BUFFER];
1378
1379 prefix2str(p, buff, sizeof(buff));
1380 flog_warn(
1381 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1382 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1383 caller, buff, nexthop_num, zrouter.multipath_num);
1384 }
1385 }
1386
1387 static void zread_route_add(ZAPI_HANDLER_ARGS)
1388 {
1389 struct stream *s;
1390 struct zapi_route api;
1391 struct zapi_nexthop *api_nh;
1392 afi_t afi;
1393 struct prefix_ipv6 *src_p = NULL;
1394 struct route_entry *re;
1395 struct nexthop *nexthop = NULL;
1396 int i, ret;
1397 vrf_id_t vrf_id = 0;
1398 struct ipaddr vtep_ip;
1399
1400 s = msg;
1401 if (zapi_route_decode(s, &api) < 0) {
1402 if (IS_ZEBRA_DEBUG_RECV)
1403 zlog_debug("%s: Unable to decode zapi_route sent",
1404 __PRETTY_FUNCTION__);
1405 return;
1406 }
1407
1408 if (IS_ZEBRA_DEBUG_RECV) {
1409 char buf_prefix[PREFIX_STRLEN];
1410
1411 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1412 zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
1413 __func__, buf_prefix,
1414 (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
1415 : "un"),
1416 api.flags);
1417 }
1418
1419 /* Allocate new route. */
1420 vrf_id = zvrf_id(zvrf);
1421 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
1422 re->type = api.type;
1423 re->instance = api.instance;
1424 re->flags = api.flags;
1425 re->uptime = monotime(NULL);
1426 re->vrf_id = vrf_id;
1427 if (api.tableid && vrf_id == VRF_DEFAULT)
1428 re->table = api.tableid;
1429 else
1430 re->table = zvrf->table_id;
1431
1432 if (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)
1433 || api.nexthop_num == 0) {
1434 char buf_prefix[PREFIX_STRLEN];
1435
1436 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1437 flog_warn(EC_ZEBRA_RX_ROUTE_NO_NEXTHOPS,
1438 "%s: received a route without nexthops for prefix %s",
1439 __func__, buf_prefix);
1440 XFREE(MTYPE_RE, re);
1441 return;
1442 }
1443
1444 /*
1445 * TBD should _all_ of the nexthop add operations use
1446 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1447 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1448 */
1449 for (i = 0; i < api.nexthop_num; i++) {
1450 api_nh = &api.nexthops[i];
1451 ifindex_t ifindex = 0;
1452
1453 if (IS_ZEBRA_DEBUG_RECV)
1454 zlog_debug("nh type %d", api_nh->type);
1455
1456 switch (api_nh->type) {
1457 case NEXTHOP_TYPE_IFINDEX:
1458 nexthop = route_entry_nexthop_ifindex_add(
1459 re, api_nh->ifindex, api_nh->vrf_id);
1460 break;
1461 case NEXTHOP_TYPE_IPV4:
1462 if (IS_ZEBRA_DEBUG_RECV) {
1463 char nhbuf[INET6_ADDRSTRLEN] = {0};
1464
1465 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1466 INET6_ADDRSTRLEN);
1467 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1468 nhbuf, api_nh->vrf_id);
1469 }
1470 nexthop = route_entry_nexthop_ipv4_add(
1471 re, &api_nh->gate.ipv4, NULL, api_nh->vrf_id);
1472 break;
1473 case NEXTHOP_TYPE_IPV4_IFINDEX:
1474
1475 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1476 ifindex = api_nh->ifindex;
1477 if (IS_ZEBRA_DEBUG_RECV) {
1478 char nhbuf[INET6_ADDRSTRLEN] = {0};
1479
1480 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1481 INET6_ADDRSTRLEN);
1482 zlog_debug(
1483 "%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
1484 __func__, nhbuf, api_nh->vrf_id,
1485 re->vrf_id, ifindex);
1486 }
1487 nexthop = route_entry_nexthop_ipv4_ifindex_add(
1488 re, &api_nh->gate.ipv4, NULL, ifindex,
1489 api_nh->vrf_id);
1490
1491 /* Special handling for IPv4 routes sourced from EVPN:
1492 * the nexthop and associated MAC need to be installed.
1493 */
1494 if (CHECK_FLAG(api.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1495 vtep_ip.ipa_type = IPADDR_V4;
1496 memcpy(&(vtep_ip.ipaddr_v4),
1497 &(api_nh->gate.ipv4),
1498 sizeof(struct in_addr));
1499 zebra_vxlan_evpn_vrf_route_add(
1500 api_nh->vrf_id, &api_nh->rmac,
1501 &vtep_ip, &api.prefix);
1502 }
1503 break;
1504 case NEXTHOP_TYPE_IPV6:
1505 nexthop = route_entry_nexthop_ipv6_add(
1506 re, &api_nh->gate.ipv6, api_nh->vrf_id);
1507 break;
1508 case NEXTHOP_TYPE_IPV6_IFINDEX:
1509 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1510 ifindex = api_nh->ifindex;
1511 nexthop = route_entry_nexthop_ipv6_ifindex_add(
1512 re, &api_nh->gate.ipv6, ifindex,
1513 api_nh->vrf_id);
1514
1515 /* Special handling for IPv6 routes sourced from EVPN:
1516 * the nexthop and associated MAC need to be installed.
1517 */
1518 if (CHECK_FLAG(api.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1519 vtep_ip.ipa_type = IPADDR_V6;
1520 memcpy(&vtep_ip.ipaddr_v6, &(api_nh->gate.ipv6),
1521 sizeof(struct in6_addr));
1522 zebra_vxlan_evpn_vrf_route_add(
1523 api_nh->vrf_id, &api_nh->rmac,
1524 &vtep_ip, &api.prefix);
1525 }
1526 break;
1527 case NEXTHOP_TYPE_BLACKHOLE:
1528 nexthop = route_entry_nexthop_blackhole_add(
1529 re, api_nh->bh_type);
1530 break;
1531 }
1532
1533 if (!nexthop) {
1534 flog_warn(
1535 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1536 "%s: Nexthops Specified: %d but we failed to properly create one",
1537 __PRETTY_FUNCTION__, api.nexthop_num);
1538 nexthops_free(re->ng.nexthop);
1539 XFREE(MTYPE_RE, re);
1540 return;
1541 }
1542 if (api_nh->onlink)
1543 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1544
1545 /* MPLS labels for BGP-LU or Segment Routing */
1546 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
1547 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1548 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1549 enum lsp_types_t label_type;
1550
1551 label_type = lsp_type_from_re_type(client->proto);
1552
1553 if (IS_ZEBRA_DEBUG_RECV) {
1554 zlog_debug(
1555 "%s: adding %d labels of type %d (1st=%u)",
1556 __func__, api_nh->label_num, label_type,
1557 api_nh->labels[0]);
1558 }
1559
1560 nexthop_add_labels(nexthop, label_type,
1561 api_nh->label_num,
1562 &api_nh->labels[0]);
1563 }
1564 }
1565
1566 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
1567 re->distance = api.distance;
1568 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
1569 re->metric = api.metric;
1570 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
1571 re->tag = api.tag;
1572 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
1573 re->mtu = api.mtu;
1574
1575 afi = family2afi(api.prefix.family);
1576 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1577 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1578 "%s: Received SRC Prefix but afi is not v6",
1579 __PRETTY_FUNCTION__);
1580 nexthops_free(re->ng.nexthop);
1581 XFREE(MTYPE_RE, re);
1582 return;
1583 }
1584 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1585 src_p = &api.src_prefix;
1586
1587 ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
1588
1589 /* Stats */
1590 switch (api.prefix.family) {
1591 case AF_INET:
1592 if (ret > 0)
1593 client->v4_route_add_cnt++;
1594 else if (ret < 0)
1595 client->v4_route_upd8_cnt++;
1596 break;
1597 case AF_INET6:
1598 if (ret > 0)
1599 client->v6_route_add_cnt++;
1600 else if (ret < 0)
1601 client->v6_route_upd8_cnt++;
1602 break;
1603 }
1604 }
1605
1606 static void zread_route_del(ZAPI_HANDLER_ARGS)
1607 {
1608 struct stream *s;
1609 struct zapi_route api;
1610 afi_t afi;
1611 struct prefix_ipv6 *src_p = NULL;
1612 uint32_t table_id;
1613
1614 s = msg;
1615 if (zapi_route_decode(s, &api) < 0)
1616 return;
1617
1618 afi = family2afi(api.prefix.family);
1619 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1620 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1621 "%s: Received a src prefix while afi is not v6",
1622 __PRETTY_FUNCTION__);
1623 return;
1624 }
1625 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1626 src_p = &api.src_prefix;
1627
1628 if (api.vrf_id == VRF_DEFAULT && api.tableid != 0)
1629 table_id = api.tableid;
1630 else
1631 table_id = zvrf->table_id;
1632
1633 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
1634 api.flags, &api.prefix, src_p, NULL, table_id, api.metric,
1635 api.distance, false);
1636
1637 /* Stats */
1638 switch (api.prefix.family) {
1639 case AF_INET:
1640 client->v4_route_del_cnt++;
1641 break;
1642 case AF_INET6:
1643 client->v6_route_del_cnt++;
1644 break;
1645 }
1646 }
1647
1648 /* MRIB Nexthop lookup for IPv4. */
1649 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
1650 {
1651 struct in_addr addr;
1652 struct route_entry *re;
1653
1654 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
1655 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
1656 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
1657
1658 stream_failure:
1659 return;
1660 }
1661
1662 /* Register zebra server router-id information. Send current router-id */
1663 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
1664 {
1665 struct prefix p;
1666
1667 /* Router-id information is needed. */
1668 vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
1669
1670 router_id_get(&p, zvrf_id(zvrf));
1671
1672 zsend_router_id_update(client, &p, zvrf_id(zvrf));
1673 }
1674
1675 /* Unregister zebra server router-id information. */
1676 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
1677 {
1678 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1679 }
1680
1681 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
1682 {
1683 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1684
1685 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
1686 stream_putl(s, vrf_get_backend());
1687 stream_putc(s, mpls_enabled);
1688 stream_putl(s, zrouter.multipath_num);
1689 stream_putc(s, zebra_mlag_get_role());
1690
1691 stream_putw_at(s, 0, stream_get_endp(s));
1692 zserv_send_message(client, s);
1693 }
1694
1695 void zsend_capabilities_all_clients(void)
1696 {
1697 struct listnode *node, *nnode;
1698 struct zebra_vrf *zvrf;
1699 struct zserv *client;
1700
1701 zvrf = vrf_info_lookup(VRF_DEFAULT);
1702 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
1703 zsend_capabilities(client, zvrf);
1704 }
1705 }
1706
1707 /* Tie up route-type and client->sock */
1708 static void zread_hello(ZAPI_HANDLER_ARGS)
1709 {
1710 /* type of protocol (lib/zebra.h) */
1711 uint8_t proto;
1712 unsigned short instance;
1713 uint8_t notify;
1714
1715 STREAM_GETC(msg, proto);
1716 STREAM_GETW(msg, instance);
1717 STREAM_GETC(msg, notify);
1718 if (notify)
1719 client->notify_owner = true;
1720
1721 /* accept only dynamic routing protocols */
1722 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
1723 zlog_notice(
1724 "client %d says hello and bids fair to announce only %s routes vrf=%u",
1725 client->sock, zebra_route_string(proto),
1726 zvrf->vrf->vrf_id);
1727 if (instance)
1728 zlog_notice("client protocol instance %d", instance);
1729
1730 client->proto = proto;
1731 client->instance = instance;
1732 }
1733
1734 zsend_capabilities(client, zvrf);
1735 zebra_vrf_update_all(client);
1736 stream_failure:
1737 return;
1738 }
1739
1740 /* Unregister all information in a VRF. */
1741 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
1742 {
1743 int i;
1744 afi_t afi;
1745
1746 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
1747 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
1748 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
1749 vrf_bitmap_unset(client->redist_default[afi], zvrf_id(zvrf));
1750 }
1751 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1752 }
1753
1754 static void zread_mpls_labels(ZAPI_HANDLER_ARGS)
1755 {
1756 struct stream *s;
1757 enum lsp_types_t type;
1758 struct prefix prefix;
1759 enum nexthop_types_t gtype;
1760 union g_addr gate;
1761 ifindex_t ifindex;
1762 mpls_label_t in_label, out_label;
1763 uint8_t distance;
1764
1765 /* Get input stream. */
1766 s = msg;
1767
1768 /* Get data. */
1769 STREAM_GETC(s, type);
1770 STREAM_GETL(s, prefix.family);
1771 switch (prefix.family) {
1772 case AF_INET:
1773 STREAM_GET(&prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1774 STREAM_GETC(s, prefix.prefixlen);
1775 if (prefix.prefixlen > IPV4_MAX_BITLEN) {
1776 zlog_debug(
1777 "%s: Specified prefix length %d is greater than a v4 address can support",
1778 __PRETTY_FUNCTION__, prefix.prefixlen);
1779 return;
1780 }
1781 STREAM_GET(&gate.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
1782 break;
1783 case AF_INET6:
1784 STREAM_GET(&prefix.u.prefix6, s, 16);
1785 STREAM_GETC(s, prefix.prefixlen);
1786 if (prefix.prefixlen > IPV6_MAX_BITLEN) {
1787 zlog_debug(
1788 "%s: Specified prefix length %d is greater than a v6 address can support",
1789 __PRETTY_FUNCTION__, prefix.prefixlen);
1790 return;
1791 }
1792 STREAM_GET(&gate.ipv6, s, 16);
1793 break;
1794 default:
1795 zlog_debug("%s: Specified AF %d is not supported for this call",
1796 __PRETTY_FUNCTION__, prefix.family);
1797 return;
1798 }
1799 STREAM_GETL(s, ifindex);
1800 STREAM_GETC(s, distance);
1801 STREAM_GETL(s, in_label);
1802 STREAM_GETL(s, out_label);
1803
1804 switch (prefix.family) {
1805 case AF_INET:
1806 if (ifindex)
1807 gtype = NEXTHOP_TYPE_IPV4_IFINDEX;
1808 else
1809 gtype = NEXTHOP_TYPE_IPV4;
1810 break;
1811 case AF_INET6:
1812 if (ifindex)
1813 gtype = NEXTHOP_TYPE_IPV6_IFINDEX;
1814 else
1815 gtype = NEXTHOP_TYPE_IPV6;
1816 break;
1817 default:
1818 return;
1819 }
1820
1821 if (!mpls_enabled)
1822 return;
1823
1824 if (hdr->command == ZEBRA_MPLS_LABELS_ADD) {
1825 mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
1826 ifindex);
1827 mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
1828 distance, out_label);
1829 } else if (hdr->command == ZEBRA_MPLS_LABELS_DELETE) {
1830 mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
1831 mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
1832 distance, out_label);
1833 }
1834 stream_failure:
1835 return;
1836 }
1837
1838 /* Send response to a table manager connect request to client */
1839 static void zread_table_manager_connect(struct zserv *client,
1840 struct stream *msg, vrf_id_t vrf_id)
1841 {
1842 struct stream *s;
1843 uint8_t proto;
1844 uint16_t instance;
1845
1846 s = msg;
1847
1848 /* Get data. */
1849 STREAM_GETC(s, proto);
1850 STREAM_GETW(s, instance);
1851
1852 /* accept only dynamic routing protocols */
1853 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1854 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1855 "client %d has wrong protocol %s", client->sock,
1856 zebra_route_string(proto));
1857 zsend_table_manager_connect_response(client, vrf_id, 1);
1858 return;
1859 }
1860 zlog_notice("client %d with vrf %u instance %u connected as %s",
1861 client->sock, vrf_id, instance, zebra_route_string(proto));
1862 client->proto = proto;
1863 client->instance = instance;
1864
1865 /*
1866 * Release previous labels of same protocol and instance.
1867 * This is done in case it restarted from an unexpected shutdown.
1868 */
1869 release_daemon_table_chunks(client);
1870
1871 zsend_table_manager_connect_response(client, vrf_id, 0);
1872
1873 stream_failure:
1874 return;
1875 }
1876
1877 static void zread_label_manager_connect(struct zserv *client,
1878 struct stream *msg, vrf_id_t vrf_id)
1879 {
1880 struct stream *s;
1881 /* type of protocol (lib/zebra.h) */
1882 uint8_t proto;
1883 unsigned short instance;
1884
1885 /* Get input stream. */
1886 s = msg;
1887
1888 /* Get data. */
1889 STREAM_GETC(s, proto);
1890 STREAM_GETW(s, instance);
1891
1892 /* accept only dynamic routing protocols */
1893 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1894 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1895 "client %d has wrong protocol %s", client->sock,
1896 zebra_route_string(proto));
1897 zsend_label_manager_connect_response(client, vrf_id, 1);
1898 return;
1899 }
1900
1901 /* recall proto and instance in this socket */
1902 client->proto = proto;
1903 client->instance = instance;
1904
1905 /* call hook for connection using wrapper */
1906 lm_client_connect_call(proto, instance, vrf_id);
1907
1908 stream_failure:
1909 return;
1910 }
1911
1912 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
1913 vrf_id_t vrf_id)
1914 {
1915 struct stream *s;
1916 uint8_t keep;
1917 uint32_t size, base;
1918 struct label_manager_chunk *lmc = NULL;
1919 uint8_t proto;
1920 unsigned short instance;
1921
1922 /* Get input stream. */
1923 s = msg;
1924
1925 /* Get data. */
1926 STREAM_GETC(s, proto);
1927 STREAM_GETW(s, instance);
1928 STREAM_GETC(s, keep);
1929 STREAM_GETL(s, size);
1930 STREAM_GETL(s, base);
1931
1932 /* call hook to get a chunk using wrapper */
1933 lm_get_chunk_call(&lmc, proto, instance, keep, size, base, vrf_id);
1934
1935 if (!lmc)
1936 flog_err(
1937 EC_ZEBRA_LM_CANNOT_ASSIGN_CHUNK,
1938 "Unable to assign Label Chunk of size %u to %s instance %u",
1939 size, zebra_route_string(proto), instance);
1940 else
1941 zlog_debug("Assigned Label Chunk %u - %u to %s instance %u",
1942 lmc->start, lmc->end,
1943 zebra_route_string(proto), instance);
1944
1945 stream_failure:
1946 return;
1947 }
1948
1949 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
1950 {
1951 struct stream *s;
1952 uint32_t start, end;
1953 uint8_t proto;
1954 unsigned short instance;
1955
1956 /* Get input stream. */
1957 s = msg;
1958
1959 /* Get data. */
1960 STREAM_GETC(s, proto);
1961 STREAM_GETW(s, instance);
1962 STREAM_GETL(s, start);
1963 STREAM_GETL(s, end);
1964
1965 /* call hook to release a chunk using wrapper */
1966 lm_release_chunk_call(proto, instance, start, end);
1967
1968 stream_failure:
1969 return;
1970 }
1971
1972 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
1973 {
1974 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT
1975 || hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC)
1976 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
1977 else {
1978 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
1979 zread_get_label_chunk(client, msg, zvrf_id(zvrf));
1980 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
1981 zread_release_label_chunk(client, msg);
1982 }
1983 }
1984
1985 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
1986 vrf_id_t vrf_id)
1987 {
1988 struct stream *s;
1989 uint32_t size;
1990 struct table_manager_chunk *tmc;
1991
1992 /* Get input stream. */
1993 s = msg;
1994
1995 /* Get data. */
1996 STREAM_GETL(s, size);
1997
1998 tmc = assign_table_chunk(client->proto, client->instance, size);
1999 if (!tmc)
2000 flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK,
2001 "%s: Unable to assign Table Chunk of size %u",
2002 __func__, size);
2003 else
2004 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
2005 tmc->end);
2006 /* send response back */
2007 zsend_assign_table_chunk_response(client, vrf_id, tmc);
2008
2009 stream_failure:
2010 return;
2011 }
2012
2013 static void zread_release_table_chunk(struct zserv *client, struct stream *msg)
2014 {
2015 struct stream *s;
2016 uint32_t start, end;
2017
2018 /* Get input stream. */
2019 s = msg;
2020
2021 /* Get data. */
2022 STREAM_GETL(s, start);
2023 STREAM_GETL(s, end);
2024
2025 release_table_chunk(client->proto, client->instance, start, end);
2026
2027 stream_failure:
2028 return;
2029 }
2030
2031 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2032 {
2033 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
2034 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2035 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2036 else {
2037 /* Sanity: don't allow 'unidentified' requests */
2038 if (!client->proto) {
2039 flog_err(
2040 EC_ZEBRA_TM_ALIENS,
2041 "Got table request from an unidentified client");
2042 return;
2043 }
2044 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2045 zread_get_table_chunk(client, msg, zvrf_id(zvrf));
2046 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2047 zread_release_table_chunk(client, msg);
2048 }
2049 }
2050
2051 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2052 {
2053 struct stream *s;
2054 char ifname[IF_NAMESIZE];
2055 ifindex_t ifindex;
2056 int type;
2057 int af;
2058 union g_addr nexthop;
2059 uint32_t local_label;
2060 uint32_t remote_label;
2061 uint8_t flags;
2062 union pw_protocol_fields data;
2063 uint8_t protocol;
2064 struct zebra_pw *pw;
2065
2066 /* Get input stream. */
2067 s = msg;
2068
2069 /* Get data. */
2070 STREAM_GET(ifname, s, IF_NAMESIZE);
2071 STREAM_GETL(s, ifindex);
2072 STREAM_GETL(s, type);
2073 STREAM_GETL(s, af);
2074 switch (af) {
2075 case AF_INET:
2076 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
2077 break;
2078 case AF_INET6:
2079 STREAM_GET(&nexthop.ipv6, s, 16);
2080 break;
2081 default:
2082 return;
2083 }
2084 STREAM_GETL(s, local_label);
2085 STREAM_GETL(s, remote_label);
2086 STREAM_GETC(s, flags);
2087 STREAM_GET(&data, s, sizeof(data));
2088 protocol = client->proto;
2089
2090 pw = zebra_pw_find(zvrf, ifname);
2091 switch (hdr->command) {
2092 case ZEBRA_PW_ADD:
2093 if (pw) {
2094 flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS,
2095 "%s: pseudowire %s already exists [%s]",
2096 __func__, ifname,
2097 zserv_command_string(hdr->command));
2098 return;
2099 }
2100
2101 zebra_pw_add(zvrf, ifname, protocol, client);
2102 break;
2103 case ZEBRA_PW_DELETE:
2104 if (!pw) {
2105 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2106 "%s: pseudowire %s not found [%s]", __func__,
2107 ifname, zserv_command_string(hdr->command));
2108 return;
2109 }
2110
2111 zebra_pw_del(zvrf, pw);
2112 break;
2113 case ZEBRA_PW_SET:
2114 case ZEBRA_PW_UNSET:
2115 if (!pw) {
2116 flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT,
2117 "%s: pseudowire %s not found [%s]", __func__,
2118 ifname, zserv_command_string(hdr->command));
2119 return;
2120 }
2121
2122 switch (hdr->command) {
2123 case ZEBRA_PW_SET:
2124 pw->enabled = 1;
2125 break;
2126 case ZEBRA_PW_UNSET:
2127 pw->enabled = 0;
2128 break;
2129 }
2130
2131 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
2132 remote_label, flags, &data);
2133 break;
2134 }
2135
2136 stream_failure:
2137 return;
2138 }
2139
2140 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
2141 {
2142 struct interface *master;
2143 struct interface *slave;
2144 struct stream *s = msg;
2145 int ifindex;
2146 vrf_id_t vrf_id;
2147
2148 STREAM_GETL(s, vrf_id);
2149 STREAM_GETL(s, ifindex);
2150 master = if_lookup_by_index(ifindex, vrf_id);
2151
2152 STREAM_GETL(s, vrf_id);
2153 STREAM_GETL(s, ifindex);
2154 slave = if_lookup_by_index(ifindex, vrf_id);
2155
2156 if (!master || !slave)
2157 return;
2158
2159 kernel_interface_set_master(master, slave);
2160
2161 stream_failure:
2162 return;
2163 }
2164
2165
2166 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
2167 {
2168 struct interface *ifp;
2169 mpls_label_t nlabel;
2170 afi_t afi;
2171 struct stream *s;
2172 struct zebra_vrf *def_zvrf;
2173 enum lsp_types_t ltype;
2174
2175 s = msg;
2176 STREAM_GETL(s, nlabel);
2177 STREAM_GETC(s, afi);
2178 if (nlabel == zvrf->label[afi]) {
2179 /*
2180 * Nothing to do here move along
2181 */
2182 return;
2183 }
2184
2185 STREAM_GETC(s, ltype);
2186
2187 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
2188 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
2189 else
2190 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
2191
2192 if (!ifp) {
2193 zlog_debug("Unable to find specified Interface for %s",
2194 zvrf->vrf->name);
2195 return;
2196 }
2197
2198 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
2199
2200 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
2201 afi_t scrubber;
2202 bool really_remove;
2203
2204 really_remove = true;
2205 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
2206 if (scrubber == afi)
2207 continue;
2208
2209 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
2210 continue;
2211
2212 if (zvrf->label[afi] == zvrf->label[scrubber]) {
2213 really_remove = false;
2214 break;
2215 }
2216 }
2217
2218 if (really_remove)
2219 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
2220 NEXTHOP_TYPE_IFINDEX, NULL,
2221 ifp->ifindex);
2222 }
2223
2224 if (nlabel != MPLS_LABEL_NONE)
2225 mpls_lsp_install(def_zvrf, ltype, nlabel,
2226 MPLS_LABEL_IMPLICIT_NULL, NEXTHOP_TYPE_IFINDEX,
2227 NULL, ifp->ifindex);
2228
2229 zvrf->label[afi] = nlabel;
2230 stream_failure:
2231 return;
2232 }
2233
2234 static inline void zread_rule(ZAPI_HANDLER_ARGS)
2235 {
2236 struct zebra_pbr_rule zpr;
2237 struct stream *s;
2238 uint32_t total, i;
2239 ifindex_t ifindex;
2240
2241 s = msg;
2242 STREAM_GETL(s, total);
2243
2244 for (i = 0; i < total; i++) {
2245 memset(&zpr, 0, sizeof(zpr));
2246
2247 zpr.sock = client->sock;
2248 zpr.rule.vrf_id = hdr->vrf_id;
2249 STREAM_GETL(s, zpr.rule.seq);
2250 STREAM_GETL(s, zpr.rule.priority);
2251 STREAM_GETL(s, zpr.rule.unique);
2252 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
2253 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
2254 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
2255 prefix_blen(&zpr.rule.filter.src_ip));
2256 STREAM_GETW(s, zpr.rule.filter.src_port);
2257 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
2258 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
2259 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
2260 prefix_blen(&zpr.rule.filter.dst_ip));
2261 STREAM_GETW(s, zpr.rule.filter.dst_port);
2262 STREAM_GETL(s, zpr.rule.filter.fwmark);
2263 STREAM_GETL(s, zpr.rule.action.table);
2264 STREAM_GETL(s, ifindex);
2265
2266 if (ifindex) {
2267 zpr.ifp = if_lookup_by_index_per_ns(
2268 zvrf->zns,
2269 ifindex);
2270 if (!zpr.ifp) {
2271 zlog_debug("Failed to lookup ifindex: %u",
2272 ifindex);
2273 return;
2274 }
2275 }
2276
2277 if (!is_default_prefix(&zpr.rule.filter.src_ip))
2278 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
2279
2280 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
2281 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
2282
2283 if (zpr.rule.filter.src_port)
2284 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
2285
2286 if (zpr.rule.filter.dst_port)
2287 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
2288
2289 if (zpr.rule.filter.fwmark)
2290 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
2291
2292 zpr.vrf_id = zvrf->vrf->vrf_id;
2293 if (hdr->command == ZEBRA_RULE_ADD)
2294 zebra_pbr_add_rule(&zpr);
2295 else
2296 zebra_pbr_del_rule(&zpr);
2297 }
2298
2299 stream_failure:
2300 return;
2301 }
2302
2303 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
2304 {
2305 struct zebra_pbr_ipset zpi;
2306 struct stream *s;
2307 uint32_t total, i;
2308
2309 s = msg;
2310 STREAM_GETL(s, total);
2311
2312 for (i = 0; i < total; i++) {
2313 memset(&zpi, 0, sizeof(zpi));
2314
2315 zpi.sock = client->sock;
2316 zpi.vrf_id = zvrf->vrf->vrf_id;
2317 STREAM_GETL(s, zpi.unique);
2318 STREAM_GETL(s, zpi.type);
2319 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2320
2321 if (hdr->command == ZEBRA_IPSET_CREATE)
2322 zebra_pbr_create_ipset(&zpi);
2323 else
2324 zebra_pbr_destroy_ipset(&zpi);
2325 }
2326
2327 stream_failure:
2328 return;
2329 }
2330
2331 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
2332 {
2333 struct zebra_pbr_ipset_entry zpi;
2334 struct zebra_pbr_ipset ipset;
2335 struct stream *s;
2336 uint32_t total, i;
2337
2338 s = msg;
2339 STREAM_GETL(s, total);
2340
2341 for (i = 0; i < total; i++) {
2342 memset(&zpi, 0, sizeof(zpi));
2343 memset(&ipset, 0, sizeof(ipset));
2344
2345 zpi.sock = client->sock;
2346 STREAM_GETL(s, zpi.unique);
2347 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2348 STREAM_GETC(s, zpi.src.family);
2349 STREAM_GETC(s, zpi.src.prefixlen);
2350 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
2351 STREAM_GETC(s, zpi.dst.family);
2352 STREAM_GETC(s, zpi.dst.prefixlen);
2353 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
2354
2355 STREAM_GETW(s, zpi.src_port_min);
2356 STREAM_GETW(s, zpi.src_port_max);
2357 STREAM_GETW(s, zpi.dst_port_min);
2358 STREAM_GETW(s, zpi.dst_port_max);
2359 STREAM_GETC(s, zpi.proto);
2360 if (!is_default_prefix(&zpi.src))
2361 zpi.filter_bm |= PBR_FILTER_SRC_IP;
2362
2363 if (!is_default_prefix(&zpi.dst))
2364 zpi.filter_bm |= PBR_FILTER_DST_IP;
2365 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2366 zpi.filter_bm |= PBR_FILTER_DST_PORT;
2367 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2368 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
2369 if (zpi.dst_port_max != 0)
2370 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
2371 if (zpi.src_port_max != 0)
2372 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
2373 if (zpi.proto != 0)
2374 zpi.filter_bm |= PBR_FILTER_PROTO;
2375
2376 /* calculate backpointer */
2377 zpi.backpointer =
2378 zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
2379 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
2380 zebra_pbr_add_ipset_entry(&zpi);
2381 else
2382 zebra_pbr_del_ipset_entry(&zpi);
2383 }
2384
2385 stream_failure:
2386 return;
2387 }
2388
2389 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
2390 {
2391 struct zebra_pbr_iptable zpi;
2392 struct stream *s;
2393
2394 s = msg;
2395
2396 memset(&zpi, 0, sizeof(zpi));
2397
2398 zpi.interface_name_list = list_new();
2399 zpi.sock = client->sock;
2400 zpi.vrf_id = zvrf->vrf->vrf_id;
2401 STREAM_GETL(s, zpi.unique);
2402 STREAM_GETL(s, zpi.type);
2403 STREAM_GETL(s, zpi.filter_bm);
2404 STREAM_GETL(s, zpi.action);
2405 STREAM_GETL(s, zpi.fwmark);
2406 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2407 STREAM_GETW(s, zpi.pkt_len_min);
2408 STREAM_GETW(s, zpi.pkt_len_max);
2409 STREAM_GETW(s, zpi.tcp_flags);
2410 STREAM_GETW(s, zpi.tcp_mask_flags);
2411 STREAM_GETC(s, zpi.dscp_value);
2412 STREAM_GETC(s, zpi.fragment);
2413 STREAM_GETC(s, zpi.protocol);
2414 STREAM_GETL(s, zpi.nb_interface);
2415 zebra_pbr_iptable_update_interfacelist(s, &zpi);
2416
2417 if (hdr->command == ZEBRA_IPTABLE_ADD)
2418 zebra_pbr_add_iptable(&zpi);
2419 else
2420 zebra_pbr_del_iptable(&zpi);
2421 stream_failure:
2422 return;
2423 }
2424
2425 void (*zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
2426 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
2427 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
2428 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
2429 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
2430 [ZEBRA_INTERFACE_SET_PROTODOWN] = zread_interface_set_protodown,
2431 [ZEBRA_ROUTE_ADD] = zread_route_add,
2432 [ZEBRA_ROUTE_DELETE] = zread_route_del,
2433 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
2434 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
2435 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
2436 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
2437 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
2438 [ZEBRA_HELLO] = zread_hello,
2439 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
2440 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
2441 [ZEBRA_IMPORT_ROUTE_REGISTER] = zread_rnh_register,
2442 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = zread_rnh_unregister,
2443 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
2444 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
2445 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
2446 #if HAVE_BFDD > 0
2447 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
2448 #endif /* HAVE_BFDD */
2449 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
2450 [ZEBRA_VRF_LABEL] = zread_vrf_label,
2451 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
2452 #if defined(HAVE_RTADV)
2453 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
2454 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
2455 #else
2456 [ZEBRA_INTERFACE_ENABLE_RADV] = NULL,
2457 [ZEBRA_INTERFACE_DISABLE_RADV] = NULL,
2458 #endif
2459 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels,
2460 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels,
2461 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
2462 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
2463 [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request,
2464 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
2465 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
2466 [ZEBRA_FEC_REGISTER] = zread_fec_register,
2467 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
2468 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
2469 [ZEBRA_ADVERTISE_SVI_MACIP] = zebra_vxlan_advertise_svi_macip,
2470 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
2471 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
2472 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add,
2473 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del,
2474 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
2475 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
2476 [ZEBRA_DUPLICATE_ADDR_DETECTION] = zebra_vxlan_dup_addr_detection,
2477 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
2478 [ZEBRA_PW_ADD] = zread_pseudowire,
2479 [ZEBRA_PW_DELETE] = zread_pseudowire,
2480 [ZEBRA_PW_SET] = zread_pseudowire,
2481 [ZEBRA_PW_UNSET] = zread_pseudowire,
2482 [ZEBRA_RULE_ADD] = zread_rule,
2483 [ZEBRA_RULE_DELETE] = zread_rule,
2484 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
2485 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
2486 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
2487 [ZEBRA_IPSET_CREATE] = zread_ipset,
2488 [ZEBRA_IPSET_DESTROY] = zread_ipset,
2489 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
2490 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
2491 [ZEBRA_IPTABLE_ADD] = zread_iptable,
2492 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
2493 [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control,
2494 [ZEBRA_VXLAN_SG_REPLAY] = zebra_vxlan_sg_replay,
2495 };
2496
2497 #if defined(HANDLE_ZAPI_FUZZING)
2498 extern struct zebra_privs_t zserv_privs;
2499
2500 static void zserv_write_incoming(struct stream *orig, uint16_t command)
2501 {
2502 char fname[MAXPATHLEN];
2503 struct stream *copy;
2504 int fd = -1;
2505
2506 copy = stream_dup(orig);
2507 stream_set_getp(copy, 0);
2508
2509 snprintf(fname, MAXPATHLEN, "%s/%u", frr_vtydir, command);
2510
2511 frr_elevate_privs(&zserv_privs) {
2512 fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
2513 }
2514 stream_flush(copy, fd);
2515 close(fd);
2516 stream_free(copy);
2517 }
2518 #endif
2519
2520 void zserv_handle_commands(struct zserv *client, struct stream *msg)
2521 {
2522 struct zmsghdr hdr;
2523 struct zebra_vrf *zvrf;
2524
2525 zapi_parse_header(msg, &hdr);
2526
2527 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
2528 zserv_log_message(NULL, msg, &hdr);
2529
2530 #if defined(HANDLE_ZAPI_FUZZING)
2531 zserv_write_incoming(msg, hdr.command);
2532 #endif
2533
2534 hdr.length -= ZEBRA_HEADER_SIZE;
2535
2536 /* lookup vrf */
2537 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
2538 if (!zvrf) {
2539 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
2540 zlog_debug("ZAPI message specifies unknown VRF: %d",
2541 hdr.vrf_id);
2542 return;
2543 }
2544
2545 if (hdr.command >= array_size(zserv_handlers)
2546 || zserv_handlers[hdr.command] == NULL)
2547 zlog_info("Zebra received unknown command %d", hdr.command);
2548 else
2549 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
2550 }
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