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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,
520 const struct route_entry *re)
521 {
522 struct zapi_route api;
523 struct zapi_nexthop *api_nh;
524 struct nexthop *nexthop;
525 int count = 0;
526 afi_t afi;
527 size_t stream_size =
528 MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route));
529
530 memset(&api, 0, sizeof(api));
531 api.vrf_id = re->vrf_id;
532 api.type = re->type;
533 api.safi = SAFI_UNICAST;
534 api.instance = re->instance;
535 api.flags = re->flags;
536
537 afi = family2afi(p->family);
538 switch (afi) {
539 case AFI_IP:
540 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
541 client->redist_v4_add_cnt++;
542 else
543 client->redist_v4_del_cnt++;
544 break;
545 case AFI_IP6:
546 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
547 client->redist_v6_add_cnt++;
548 else
549 client->redist_v6_del_cnt++;
550 break;
551 default:
552 break;
553 }
554
555 /* Prefix. */
556 api.prefix = *p;
557 if (src_p) {
558 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
559 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
560 }
561
562 /* Nexthops. */
563 if (re->nexthop_active_num) {
564 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
565 api.nexthop_num = re->nexthop_active_num;
566 }
567 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) {
568 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
569 continue;
570
571 api_nh = &api.nexthops[count];
572 api_nh->vrf_id = nexthop->vrf_id;
573 api_nh->type = nexthop->type;
574 switch (nexthop->type) {
575 case NEXTHOP_TYPE_BLACKHOLE:
576 api_nh->bh_type = nexthop->bh_type;
577 break;
578 case NEXTHOP_TYPE_IPV4:
579 api_nh->gate.ipv4 = nexthop->gate.ipv4;
580 break;
581 case NEXTHOP_TYPE_IPV4_IFINDEX:
582 api_nh->gate.ipv4 = nexthop->gate.ipv4;
583 api_nh->ifindex = nexthop->ifindex;
584 break;
585 case NEXTHOP_TYPE_IFINDEX:
586 api_nh->ifindex = nexthop->ifindex;
587 break;
588 case NEXTHOP_TYPE_IPV6:
589 api_nh->gate.ipv6 = nexthop->gate.ipv6;
590 break;
591 case NEXTHOP_TYPE_IPV6_IFINDEX:
592 api_nh->gate.ipv6 = nexthop->gate.ipv6;
593 api_nh->ifindex = nexthop->ifindex;
594 }
595 count++;
596 }
597
598 /* Attributes. */
599 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
600 api.distance = re->distance;
601 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
602 api.metric = re->metric;
603 if (re->tag) {
604 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
605 api.tag = re->tag;
606 }
607 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
608 api.mtu = re->mtu;
609
610 struct stream *s = stream_new(stream_size);
611
612 /* Encode route and send. */
613 if (zapi_route_encode(cmd, s, &api) < 0) {
614 stream_free(s);
615 return -1;
616 }
617
618 if (IS_ZEBRA_DEBUG_SEND) {
619 char buf_prefix[PREFIX_STRLEN];
620
621 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
622
623 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
624 __func__, zserv_command_string(cmd),
625 zebra_route_string(client->proto),
626 zebra_route_string(api.type), api.vrf_id,
627 buf_prefix);
628 }
629 return zserv_send_message(client, s);
630 }
631
632 /*
633 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
634 * nexthop is not found on mrib. Returns both route metric and protocol
635 * distance.
636 */
637 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
638 struct in_addr addr,
639 struct route_entry *re,
640 struct zebra_vrf *zvrf)
641 {
642 struct stream *s;
643 unsigned long nump;
644 uint8_t num;
645 struct nexthop *nexthop;
646
647 /* Get output stream. */
648 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
649 stream_reset(s);
650
651 /* Fill in result. */
652 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
653 stream_put_in_addr(s, &addr);
654
655 if (re) {
656 stream_putc(s, re->distance);
657 stream_putl(s, re->metric);
658 num = 0;
659 /* remember position for nexthop_num */
660 nump = stream_get_endp(s);
661 /* reserve room for nexthop_num */
662 stream_putc(s, 0);
663 /*
664 * Only non-recursive routes are elegible to resolve the
665 * nexthop we are looking up. Therefore, we will just iterate
666 * over the top chain of nexthops.
667 */
668 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next)
669 if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
670 num += zserv_encode_nexthop(s, nexthop);
671
672 /* store nexthop_num */
673 stream_putc_at(s, nump, num);
674 } else {
675 stream_putc(s, 0); /* distance */
676 stream_putl(s, 0); /* metric */
677 stream_putc(s, 0); /* nexthop_num */
678 }
679
680 stream_putw_at(s, 0, stream_get_endp(s));
681
682 return zserv_send_message(client, s);
683 }
684
685 /*
686 * Common utility send route notification, called from a path using a
687 * route_entry and from a path using a dataplane context.
688 */
689 static int route_notify_internal(const struct prefix *p, int type,
690 uint16_t instance, vrf_id_t vrf_id,
691 uint32_t table_id,
692 enum zapi_route_notify_owner note)
693 {
694 struct zserv *client;
695 struct stream *s;
696 uint8_t blen;
697
698 client = zserv_find_client(type, instance);
699 if (!client || !client->notify_owner) {
700 if (IS_ZEBRA_DEBUG_PACKET) {
701 char buff[PREFIX_STRLEN];
702
703 zlog_debug(
704 "Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
705 type, prefix2str(p, buff, sizeof(buff)),
706 table_id, note, vrf_id);
707 }
708 return 0;
709 }
710
711 if (IS_ZEBRA_DEBUG_PACKET) {
712 char buff[PREFIX_STRLEN];
713
714 zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
715 type, prefix2str(p, buff, sizeof(buff)),
716 table_id, note, vrf_id);
717 }
718
719 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
720 stream_reset(s);
721
722 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
723
724 stream_put(s, &note, sizeof(note));
725
726 stream_putc(s, p->family);
727
728 blen = prefix_blen(p);
729 stream_putc(s, p->prefixlen);
730 stream_put(s, &p->u.prefix, blen);
731
732 stream_putl(s, table_id);
733
734 stream_putw_at(s, 0, stream_get_endp(s));
735
736 return zserv_send_message(client, s);
737 }
738
739 int zsend_route_notify_owner(struct route_entry *re, const struct prefix *p,
740 enum zapi_route_notify_owner note)
741 {
742 return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
743 re->table, note));
744 }
745
746 /*
747 * Route-owner notification using info from dataplane update context.
748 */
749 int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx,
750 enum zapi_route_notify_owner note)
751 {
752 return (route_notify_internal(dplane_ctx_get_dest(ctx),
753 dplane_ctx_get_type(ctx),
754 dplane_ctx_get_instance(ctx),
755 dplane_ctx_get_vrf(ctx),
756 dplane_ctx_get_table(ctx),
757 note));
758 }
759
760 void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
761 enum zapi_rule_notify_owner note)
762 {
763 struct listnode *node;
764 struct zserv *client;
765 struct stream *s;
766
767 if (IS_ZEBRA_DEBUG_PACKET)
768 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
769 rule->rule.unique);
770
771 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
772 if (rule->sock == client->sock)
773 break;
774 }
775
776 if (!client)
777 return;
778
779 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
780
781 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
782 stream_put(s, &note, sizeof(note));
783 stream_putl(s, rule->rule.seq);
784 stream_putl(s, rule->rule.priority);
785 stream_putl(s, rule->rule.unique);
786 if (rule->ifp)
787 stream_putl(s, rule->ifp->ifindex);
788 else
789 stream_putl(s, 0);
790
791 stream_putw_at(s, 0, stream_get_endp(s));
792
793 zserv_send_message(client, s);
794 }
795
796 void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
797 enum zapi_ipset_notify_owner note)
798 {
799 struct listnode *node;
800 struct zserv *client;
801 struct stream *s;
802
803 if (IS_ZEBRA_DEBUG_PACKET)
804 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
805 ipset->unique);
806
807 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
808 if (ipset->sock == client->sock)
809 break;
810 }
811
812 if (!client)
813 return;
814
815 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
816
817 zclient_create_header(s, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
818 stream_put(s, &note, sizeof(note));
819 stream_putl(s, ipset->unique);
820 stream_put(s, ipset->ipset_name, ZEBRA_IPSET_NAME_SIZE);
821 stream_putw_at(s, 0, stream_get_endp(s));
822
823 zserv_send_message(client, s);
824 }
825
826 void zsend_ipset_entry_notify_owner(struct zebra_pbr_ipset_entry *ipset,
827 enum zapi_ipset_entry_notify_owner note)
828 {
829 struct listnode *node;
830 struct zserv *client;
831 struct stream *s;
832
833 if (IS_ZEBRA_DEBUG_PACKET)
834 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
835 ipset->unique);
836
837 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
838 if (ipset->sock == client->sock)
839 break;
840 }
841
842 if (!client)
843 return;
844
845 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
846
847 zclient_create_header(s, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
848 stream_put(s, &note, sizeof(note));
849 stream_putl(s, ipset->unique);
850 stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
851 stream_putw_at(s, 0, stream_get_endp(s));
852
853 zserv_send_message(client, s);
854 }
855
856 void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
857 enum zapi_iptable_notify_owner note)
858 {
859 struct listnode *node;
860 struct zserv *client;
861 struct stream *s;
862
863 if (IS_ZEBRA_DEBUG_PACKET)
864 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
865 iptable->unique);
866
867 for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
868 if (iptable->sock == client->sock)
869 break;
870 }
871
872 if (!client)
873 return;
874
875 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
876
877 zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
878 stream_put(s, &note, sizeof(note));
879 stream_putl(s, iptable->unique);
880 stream_putw_at(s, 0, stream_get_endp(s));
881
882 zserv_send_message(client, s);
883 }
884
885 /* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
886 int zsend_router_id_update(struct zserv *client, struct prefix *p,
887 vrf_id_t vrf_id)
888 {
889 int blen;
890
891 /* Check this client need interface information. */
892 if (!vrf_bitmap_check(client->ridinfo, vrf_id))
893 return 0;
894
895 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
896
897 /* Message type. */
898 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
899
900 /* Prefix information. */
901 stream_putc(s, p->family);
902 blen = prefix_blen(p);
903 stream_put(s, &p->u.prefix, blen);
904 stream_putc(s, p->prefixlen);
905
906 /* Write packet size. */
907 stream_putw_at(s, 0, stream_get_endp(s));
908
909 return zserv_send_message(client, s);
910 }
911
912 /*
913 * Function used by Zebra to send a PW status update to LDP daemon
914 */
915 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
916 {
917 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
918
919 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
920 stream_write(s, pw->ifname, IF_NAMESIZE);
921 stream_putl(s, pw->ifindex);
922 stream_putl(s, pw->status);
923
924 /* Put length at the first point of the stream. */
925 stream_putw_at(s, 0, stream_get_endp(s));
926
927 return zserv_send_message(client, s);
928 }
929
930 /* Send response to a get label chunk request to client */
931 int zsend_assign_label_chunk_response(struct zserv *client, vrf_id_t vrf_id,
932 uint8_t proto, uint16_t instance,
933 struct label_manager_chunk *lmc)
934 {
935 int ret;
936 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
937
938 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
939 /* proto */
940 stream_putc(s, proto);
941 /* instance */
942 stream_putw(s, instance);
943
944 if (lmc) {
945 /* keep */
946 stream_putc(s, lmc->keep);
947 /* start and end labels */
948 stream_putl(s, lmc->start);
949 stream_putl(s, lmc->end);
950 }
951
952 /* Write packet size. */
953 stream_putw_at(s, 0, stream_get_endp(s));
954
955 ret = writen(client->sock, s->data, stream_get_endp(s));
956 stream_free(s);
957 return ret;
958 }
959
960 /* Send response to a label manager connect request to client */
961 int zsend_label_manager_connect_response(struct zserv *client, vrf_id_t vrf_id,
962 unsigned short result)
963 {
964 int ret;
965 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
966
967 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
968
969 /* proto */
970 stream_putc(s, client->proto);
971
972 /* instance */
973 stream_putw(s, client->instance);
974
975 /* result */
976 stream_putc(s, result);
977
978 /* Write packet size. */
979 stream_putw_at(s, 0, stream_get_endp(s));
980
981 ret = writen(client->sock, s->data, stream_get_endp(s));
982 stream_free(s);
983
984 return ret;
985 }
986
987 /* Send response to a get table chunk request to client */
988 static int zsend_assign_table_chunk_response(struct zserv *client,
989 vrf_id_t vrf_id,
990 struct table_manager_chunk *tmc)
991 {
992 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
993
994 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
995
996 if (tmc) {
997 /* start and end labels */
998 stream_putl(s, tmc->start);
999 stream_putl(s, tmc->end);
1000 }
1001
1002 /* Write packet size. */
1003 stream_putw_at(s, 0, stream_get_endp(s));
1004
1005 return zserv_send_message(client, s);
1006 }
1007
1008 static int zsend_table_manager_connect_response(struct zserv *client,
1009 vrf_id_t vrf_id,
1010 uint16_t result)
1011 {
1012 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1013
1014 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
1015
1016 /* result */
1017 stream_putc(s, result);
1018
1019 stream_putw_at(s, 0, stream_get_endp(s));
1020
1021 return zserv_send_message(client, s);
1022 }
1023
1024 /* Inbound message handling ------------------------------------------------ */
1025
1026 int cmd2type[] = {
1027 [ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
1028 [ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
1029 [ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
1030 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
1031 };
1032
1033 /* Nexthop register */
1034 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1035 {
1036 struct rnh *rnh;
1037 struct stream *s;
1038 struct prefix p;
1039 unsigned short l = 0;
1040 uint8_t flags = 0;
1041 uint16_t type = cmd2type[hdr->command];
1042 bool exist;
1043 bool flag_changed = false;
1044 uint8_t orig_flags;
1045
1046 if (IS_ZEBRA_DEBUG_NHT)
1047 zlog_debug(
1048 "rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
1049 zebra_route_string(client->proto), hdr->length,
1050 (type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
1051 zvrf->vrf->vrf_id);
1052
1053 s = msg;
1054
1055 client->nh_reg_time = monotime(NULL);
1056
1057 while (l < hdr->length) {
1058 STREAM_GETC(s, flags);
1059 STREAM_GETW(s, p.family);
1060 STREAM_GETC(s, p.prefixlen);
1061 l += 4;
1062 if (p.family == AF_INET) {
1063 client->v4_nh_watch_add_cnt++;
1064 if (p.prefixlen > IPV4_MAX_BITLEN) {
1065 zlog_debug(
1066 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1067 __PRETTY_FUNCTION__, p.prefixlen);
1068 return;
1069 }
1070 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1071 l += IPV4_MAX_BYTELEN;
1072 } else if (p.family == AF_INET6) {
1073 client->v6_nh_watch_add_cnt++;
1074 if (p.prefixlen > IPV6_MAX_BITLEN) {
1075 zlog_debug(
1076 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1077 __PRETTY_FUNCTION__, p.prefixlen);
1078 return;
1079 }
1080 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1081 l += IPV6_MAX_BYTELEN;
1082 } else {
1083 flog_err(
1084 EC_ZEBRA_UNKNOWN_FAMILY,
1085 "rnh_register: Received unknown family type %d\n",
1086 p.family);
1087 return;
1088 }
1089 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
1090 if (!rnh)
1091 return;
1092
1093 orig_flags = rnh->flags;
1094 if (type == RNH_NEXTHOP_TYPE) {
1095 if (flags
1096 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1097 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1098 else if (!flags
1099 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1100 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1101 } else if (type == RNH_IMPORT_CHECK_TYPE) {
1102 if (flags
1103 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
1104 SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1105 else if (!flags
1106 && CHECK_FLAG(rnh->flags,
1107 ZEBRA_NHT_EXACT_MATCH))
1108 UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1109 }
1110
1111 if (orig_flags != rnh->flags)
1112 flag_changed = true;
1113
1114 /* Anything not AF_INET/INET6 has been filtered out above */
1115 if (!exist || flag_changed)
1116 zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, type,
1117 &p);
1118
1119 zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
1120 }
1121
1122 stream_failure:
1123 return;
1124 }
1125
1126 /* Nexthop register */
1127 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1128 {
1129 struct rnh *rnh;
1130 struct stream *s;
1131 struct prefix p;
1132 unsigned short l = 0;
1133 uint16_t type = cmd2type[hdr->command];
1134
1135 if (IS_ZEBRA_DEBUG_NHT)
1136 zlog_debug(
1137 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
1138 zebra_route_string(client->proto), hdr->length,
1139 zvrf->vrf->vrf_id);
1140
1141 s = msg;
1142
1143 while (l < hdr->length) {
1144 uint8_t flags;
1145
1146 STREAM_GETC(s, flags);
1147 if (flags != 0)
1148 goto stream_failure;
1149
1150 STREAM_GETW(s, p.family);
1151 STREAM_GETC(s, p.prefixlen);
1152 l += 4;
1153 if (p.family == AF_INET) {
1154 client->v4_nh_watch_rem_cnt++;
1155 if (p.prefixlen > IPV4_MAX_BITLEN) {
1156 zlog_debug(
1157 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1158 __PRETTY_FUNCTION__, p.prefixlen);
1159 return;
1160 }
1161 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1162 l += IPV4_MAX_BYTELEN;
1163 } else if (p.family == AF_INET6) {
1164 client->v6_nh_watch_rem_cnt++;
1165 if (p.prefixlen > IPV6_MAX_BITLEN) {
1166 zlog_debug(
1167 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1168 __PRETTY_FUNCTION__, p.prefixlen);
1169 return;
1170 }
1171 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1172 l += IPV6_MAX_BYTELEN;
1173 } else {
1174 flog_err(
1175 EC_ZEBRA_UNKNOWN_FAMILY,
1176 "rnh_register: Received unknown family type %d\n",
1177 p.family);
1178 return;
1179 }
1180 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
1181 if (rnh) {
1182 client->nh_dereg_time = monotime(NULL);
1183 zebra_remove_rnh_client(rnh, client, type);
1184 }
1185 }
1186 stream_failure:
1187 return;
1188 }
1189
1190 #define ZEBRA_MIN_FEC_LENGTH 5
1191
1192 /* FEC register */
1193 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1194 {
1195 struct stream *s;
1196 unsigned short l = 0;
1197 struct prefix p;
1198 uint16_t flags;
1199 uint32_t label = MPLS_INVALID_LABEL;
1200 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1201
1202 s = msg;
1203 zvrf = vrf_info_lookup(VRF_DEFAULT);
1204 if (!zvrf)
1205 return;
1206
1207 /*
1208 * The minimum amount of data that can be sent for one fec
1209 * registration
1210 */
1211 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1212 flog_err(
1213 EC_ZEBRA_IRDP_LEN_MISMATCH,
1214 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1215 hdr->length);
1216 return;
1217 }
1218
1219 while (l < hdr->length) {
1220 STREAM_GETW(s, flags);
1221 memset(&p, 0, sizeof(p));
1222 STREAM_GETW(s, p.family);
1223 if (p.family != AF_INET && p.family != AF_INET6) {
1224 flog_err(
1225 EC_ZEBRA_UNKNOWN_FAMILY,
1226 "fec_register: Received unknown family type %d\n",
1227 p.family);
1228 return;
1229 }
1230 STREAM_GETC(s, p.prefixlen);
1231 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1232 || (p.family == AF_INET6
1233 && p.prefixlen > IPV6_MAX_BITLEN)) {
1234 zlog_debug(
1235 "%s: Specified prefix hdr->length: %d is to long for %d",
1236 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1237 return;
1238 }
1239 l += 5;
1240 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1241 l += PSIZE(p.prefixlen);
1242 if (flags & ZEBRA_FEC_REGISTER_LABEL) {
1243 STREAM_GETL(s, label);
1244 l += 4;
1245 } else if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1246 STREAM_GETL(s, label_index);
1247 l += 4;
1248 }
1249
1250 zebra_mpls_fec_register(zvrf, &p, label, label_index, client);
1251 }
1252
1253 stream_failure:
1254 return;
1255 }
1256
1257 /* FEC unregister */
1258 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1259 {
1260 struct stream *s;
1261 unsigned short l = 0;
1262 struct prefix p;
1263 uint16_t flags;
1264
1265 s = msg;
1266 zvrf = vrf_info_lookup(VRF_DEFAULT);
1267 if (!zvrf)
1268 return;
1269
1270 /*
1271 * The minimum amount of data that can be sent for one
1272 * fec unregistration
1273 */
1274 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1275 flog_err(
1276 EC_ZEBRA_IRDP_LEN_MISMATCH,
1277 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1278 hdr->length);
1279 return;
1280 }
1281
1282 while (l < hdr->length) {
1283 STREAM_GETW(s, flags);
1284 if (flags != 0)
1285 goto stream_failure;
1286
1287 memset(&p, 0, sizeof(p));
1288 STREAM_GETW(s, p.family);
1289 if (p.family != AF_INET && p.family != AF_INET6) {
1290 flog_err(
1291 EC_ZEBRA_UNKNOWN_FAMILY,
1292 "fec_unregister: Received unknown family type %d\n",
1293 p.family);
1294 return;
1295 }
1296 STREAM_GETC(s, p.prefixlen);
1297 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1298 || (p.family == AF_INET6
1299 && p.prefixlen > IPV6_MAX_BITLEN)) {
1300 zlog_debug(
1301 "%s: Received prefix hdr->length %d which is greater than %d can support",
1302 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1303 return;
1304 }
1305 l += 5;
1306 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1307 l += PSIZE(p.prefixlen);
1308 zebra_mpls_fec_unregister(zvrf, &p, client);
1309 }
1310
1311 stream_failure:
1312 return;
1313 }
1314
1315
1316 /*
1317 * Register zebra server interface information.
1318 * Send current all interface and address information.
1319 */
1320 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1321 {
1322 struct vrf *vrf;
1323 struct interface *ifp;
1324
1325 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1326 FOR_ALL_INTERFACES (vrf, ifp) {
1327 /* Skip pseudo interface. */
1328 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1329 continue;
1330
1331 zsend_interface_add(client, ifp);
1332 zsend_interface_link_params(client, ifp);
1333 zsend_interface_addresses(client, ifp);
1334 }
1335 }
1336 }
1337
1338 /* Unregister zebra server interface information. */
1339 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1340 {
1341 }
1342
1343 /*
1344 * Handle message requesting interface be set up or down.
1345 */
1346 static void zread_interface_set_protodown(ZAPI_HANDLER_ARGS)
1347 {
1348 ifindex_t ifindex;
1349 struct interface *ifp;
1350 char down;
1351
1352 STREAM_GETL(msg, ifindex);
1353 STREAM_GETC(msg, down);
1354
1355 /* set ifdown */
1356 ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), ifindex);
1357
1358 if (ifp) {
1359 zlog_info("Setting interface %s (%u): protodown %s", ifp->name,
1360 ifindex, down ? "on" : "off");
1361 zebra_if_set_protodown(ifp, down);
1362 } else {
1363 zlog_warn(
1364 "Cannot set protodown %s for interface %u; does not exist",
1365 down ? "on" : "off", ifindex);
1366 }
1367
1368
1369 stream_failure:
1370 return;
1371 }
1372
1373
1374 void zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1375 const unsigned int nexthop_num)
1376 {
1377 if (nexthop_num > zrouter.multipath_num) {
1378 char buff[PREFIX2STR_BUFFER];
1379
1380 prefix2str(p, buff, sizeof(buff));
1381 flog_warn(
1382 EC_ZEBRA_MORE_NH_THAN_MULTIPATH,
1383 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1384 caller, buff, nexthop_num, zrouter.multipath_num);
1385 }
1386 }
1387
1388 static void zread_route_add(ZAPI_HANDLER_ARGS)
1389 {
1390 struct stream *s;
1391 struct zapi_route api;
1392 struct zapi_nexthop *api_nh;
1393 afi_t afi;
1394 struct prefix_ipv6 *src_p = NULL;
1395 struct route_entry *re;
1396 struct nexthop *nexthop = NULL;
1397 int i, ret;
1398 vrf_id_t vrf_id = 0;
1399 struct ipaddr vtep_ip;
1400
1401 s = msg;
1402 if (zapi_route_decode(s, &api) < 0) {
1403 if (IS_ZEBRA_DEBUG_RECV)
1404 zlog_debug("%s: Unable to decode zapi_route sent",
1405 __PRETTY_FUNCTION__);
1406 return;
1407 }
1408
1409 if (IS_ZEBRA_DEBUG_RECV) {
1410 char buf_prefix[PREFIX_STRLEN];
1411
1412 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1413 zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
1414 __func__, buf_prefix,
1415 (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
1416 : "un"),
1417 api.flags);
1418 }
1419
1420 /* Allocate new route. */
1421 vrf_id = zvrf_id(zvrf);
1422 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
1423 re->type = api.type;
1424 re->instance = api.instance;
1425 re->flags = api.flags;
1426 re->uptime = monotime(NULL);
1427 re->vrf_id = vrf_id;
1428 if (api.tableid && vrf_id == VRF_DEFAULT)
1429 re->table = api.tableid;
1430 else
1431 re->table = zvrf->table_id;
1432
1433 if (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)
1434 || api.nexthop_num == 0) {
1435 flog_warn(EC_ZEBRA_RX_ROUTE_NO_NEXTHOPS,
1436 "%s: received a route without nexthops for prefix %pFX from client %s",
1437 __func__, &api.prefix,
1438 zebra_route_string(client->proto));
1439 XFREE(MTYPE_RE, re);
1440 return;
1441 }
1442
1443 /*
1444 * TBD should _all_ of the nexthop add operations use
1445 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1446 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1447 */
1448 for (i = 0; i < api.nexthop_num; i++) {
1449 api_nh = &api.nexthops[i];
1450 ifindex_t ifindex = 0;
1451
1452 if (IS_ZEBRA_DEBUG_RECV)
1453 zlog_debug("nh type %d", api_nh->type);
1454
1455 switch (api_nh->type) {
1456 case NEXTHOP_TYPE_IFINDEX:
1457 nexthop = route_entry_nexthop_ifindex_add(
1458 re, api_nh->ifindex, api_nh->vrf_id);
1459 break;
1460 case NEXTHOP_TYPE_IPV4:
1461 if (IS_ZEBRA_DEBUG_RECV) {
1462 char nhbuf[INET6_ADDRSTRLEN] = {0};
1463
1464 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1465 INET6_ADDRSTRLEN);
1466 zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
1467 nhbuf, api_nh->vrf_id);
1468 }
1469 nexthop = route_entry_nexthop_ipv4_add(
1470 re, &api_nh->gate.ipv4, NULL, api_nh->vrf_id);
1471 break;
1472 case NEXTHOP_TYPE_IPV4_IFINDEX:
1473
1474 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1475 ifindex = api_nh->ifindex;
1476 if (IS_ZEBRA_DEBUG_RECV) {
1477 char nhbuf[INET6_ADDRSTRLEN] = {0};
1478
1479 inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
1480 INET6_ADDRSTRLEN);
1481 zlog_debug(
1482 "%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
1483 __func__, nhbuf, api_nh->vrf_id,
1484 re->vrf_id, ifindex);
1485 }
1486 nexthop = route_entry_nexthop_ipv4_ifindex_add(
1487 re, &api_nh->gate.ipv4, NULL, ifindex,
1488 api_nh->vrf_id);
1489
1490 /* Special handling for IPv4 routes sourced from EVPN:
1491 * the nexthop and associated MAC need to be installed.
1492 */
1493 if (CHECK_FLAG(api.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1494 vtep_ip.ipa_type = IPADDR_V4;
1495 memcpy(&(vtep_ip.ipaddr_v4),
1496 &(api_nh->gate.ipv4),
1497 sizeof(struct in_addr));
1498 zebra_vxlan_evpn_vrf_route_add(
1499 api_nh->vrf_id, &api_nh->rmac,
1500 &vtep_ip, &api.prefix);
1501 }
1502 break;
1503 case NEXTHOP_TYPE_IPV6:
1504 nexthop = route_entry_nexthop_ipv6_add(
1505 re, &api_nh->gate.ipv6, api_nh->vrf_id);
1506 break;
1507 case NEXTHOP_TYPE_IPV6_IFINDEX:
1508 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1509 ifindex = api_nh->ifindex;
1510 nexthop = route_entry_nexthop_ipv6_ifindex_add(
1511 re, &api_nh->gate.ipv6, ifindex,
1512 api_nh->vrf_id);
1513
1514 /* Special handling for IPv6 routes sourced from EVPN:
1515 * the nexthop and associated MAC need to be installed.
1516 */
1517 if (CHECK_FLAG(api.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
1518 vtep_ip.ipa_type = IPADDR_V6;
1519 memcpy(&vtep_ip.ipaddr_v6, &(api_nh->gate.ipv6),
1520 sizeof(struct in6_addr));
1521 zebra_vxlan_evpn_vrf_route_add(
1522 api_nh->vrf_id, &api_nh->rmac,
1523 &vtep_ip, &api.prefix);
1524 }
1525 break;
1526 case NEXTHOP_TYPE_BLACKHOLE:
1527 nexthop = route_entry_nexthop_blackhole_add(
1528 re, api_nh->bh_type);
1529 break;
1530 }
1531
1532 if (!nexthop) {
1533 flog_warn(
1534 EC_ZEBRA_NEXTHOP_CREATION_FAILED,
1535 "%s: Nexthops Specified: %d but we failed to properly create one",
1536 __PRETTY_FUNCTION__, api.nexthop_num);
1537 nexthops_free(re->ng.nexthop);
1538 XFREE(MTYPE_RE, re);
1539 return;
1540 }
1541 if (api_nh->onlink)
1542 SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
1543
1544 /* MPLS labels for BGP-LU or Segment Routing */
1545 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
1546 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1547 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1548 enum lsp_types_t label_type;
1549
1550 label_type = lsp_type_from_re_type(client->proto);
1551
1552 if (IS_ZEBRA_DEBUG_RECV) {
1553 zlog_debug(
1554 "%s: adding %d labels of type %d (1st=%u)",
1555 __func__, api_nh->label_num, label_type,
1556 api_nh->labels[0]);
1557 }
1558
1559 nexthop_add_labels(nexthop, label_type,
1560 api_nh->label_num,
1561 &api_nh->labels[0]);
1562 }
1563 }
1564
1565 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
1566 re->distance = api.distance;
1567 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
1568 re->metric = api.metric;
1569 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
1570 re->tag = api.tag;
1571 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
1572 re->mtu = api.mtu;
1573
1574 afi = family2afi(api.prefix.family);
1575 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1576 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1577 "%s: Received SRC Prefix but afi is not v6",
1578 __PRETTY_FUNCTION__);
1579 nexthops_free(re->ng.nexthop);
1580 XFREE(MTYPE_RE, re);
1581 return;
1582 }
1583 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1584 src_p = &api.src_prefix;
1585
1586 ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
1587
1588 /* Stats */
1589 switch (api.prefix.family) {
1590 case AF_INET:
1591 if (ret > 0)
1592 client->v4_route_add_cnt++;
1593 else if (ret < 0)
1594 client->v4_route_upd8_cnt++;
1595 break;
1596 case AF_INET6:
1597 if (ret > 0)
1598 client->v6_route_add_cnt++;
1599 else if (ret < 0)
1600 client->v6_route_upd8_cnt++;
1601 break;
1602 }
1603 }
1604
1605 static void zread_route_del(ZAPI_HANDLER_ARGS)
1606 {
1607 struct stream *s;
1608 struct zapi_route api;
1609 afi_t afi;
1610 struct prefix_ipv6 *src_p = NULL;
1611 uint32_t table_id;
1612
1613 s = msg;
1614 if (zapi_route_decode(s, &api) < 0)
1615 return;
1616
1617 afi = family2afi(api.prefix.family);
1618 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1619 flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI,
1620 "%s: Received a src prefix while afi is not v6",
1621 __PRETTY_FUNCTION__);
1622 return;
1623 }
1624 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1625 src_p = &api.src_prefix;
1626
1627 if (api.vrf_id == VRF_DEFAULT && api.tableid != 0)
1628 table_id = api.tableid;
1629 else
1630 table_id = zvrf->table_id;
1631
1632 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
1633 api.flags, &api.prefix, src_p, NULL, table_id, api.metric,
1634 api.distance, false);
1635
1636 /* Stats */
1637 switch (api.prefix.family) {
1638 case AF_INET:
1639 client->v4_route_del_cnt++;
1640 break;
1641 case AF_INET6:
1642 client->v6_route_del_cnt++;
1643 break;
1644 }
1645 }
1646
1647 /* MRIB Nexthop lookup for IPv4. */
1648 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
1649 {
1650 struct in_addr addr;
1651 struct route_entry *re;
1652
1653 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
1654 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
1655 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
1656
1657 stream_failure:
1658 return;
1659 }
1660
1661 /* Register zebra server router-id information. Send current router-id */
1662 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
1663 {
1664 struct prefix p;
1665
1666 /* Router-id information is needed. */
1667 vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
1668
1669 router_id_get(&p, zvrf_id(zvrf));
1670
1671 zsend_router_id_update(client, &p, zvrf_id(zvrf));
1672 }
1673
1674 /* Unregister zebra server router-id information. */
1675 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
1676 {
1677 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1678 }
1679
1680 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
1681 {
1682 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1683
1684 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
1685 stream_putl(s, vrf_get_backend());
1686 stream_putc(s, mpls_enabled);
1687 stream_putl(s, zrouter.multipath_num);
1688 stream_putc(s, zebra_mlag_get_role());
1689
1690 stream_putw_at(s, 0, stream_get_endp(s));
1691 zserv_send_message(client, s);
1692 }
1693
1694 void zsend_capabilities_all_clients(void)
1695 {
1696 struct listnode *node, *nnode;
1697 struct zebra_vrf *zvrf;
1698 struct zserv *client;
1699
1700 zvrf = vrf_info_lookup(VRF_DEFAULT);
1701 for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
1702 zsend_capabilities(client, zvrf);
1703 }
1704 }
1705
1706 /* Tie up route-type and client->sock */
1707 static void zread_hello(ZAPI_HANDLER_ARGS)
1708 {
1709 /* type of protocol (lib/zebra.h) */
1710 uint8_t proto;
1711 unsigned short instance;
1712 uint8_t notify;
1713
1714 STREAM_GETC(msg, proto);
1715 STREAM_GETW(msg, instance);
1716 STREAM_GETC(msg, notify);
1717 if (notify)
1718 client->notify_owner = true;
1719
1720 /* accept only dynamic routing protocols */
1721 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
1722 zlog_notice(
1723 "client %d says hello and bids fair to announce only %s routes vrf=%u",
1724 client->sock, zebra_route_string(proto),
1725 zvrf->vrf->vrf_id);
1726 if (instance)
1727 zlog_notice("client protocol instance %d", instance);
1728
1729 client->proto = proto;
1730 client->instance = instance;
1731 }
1732
1733 zsend_capabilities(client, zvrf);
1734 zebra_vrf_update_all(client);
1735 stream_failure:
1736 return;
1737 }
1738
1739 /* Unregister all information in a VRF. */
1740 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
1741 {
1742 int i;
1743 afi_t afi;
1744
1745 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
1746 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
1747 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
1748 vrf_bitmap_unset(client->redist_default[afi], zvrf_id(zvrf));
1749 }
1750 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1751 }
1752
1753 static void zread_mpls_labels(ZAPI_HANDLER_ARGS)
1754 {
1755 struct stream *s;
1756 enum lsp_types_t type;
1757 struct prefix prefix;
1758 enum nexthop_types_t gtype;
1759 union g_addr gate;
1760 ifindex_t ifindex;
1761 mpls_label_t in_label, out_label;
1762 uint8_t distance;
1763
1764 /* Get input stream. */
1765 s = msg;
1766
1767 /* Get data. */
1768 STREAM_GETC(s, type);
1769 STREAM_GETL(s, prefix.family);
1770 switch (prefix.family) {
1771 case AF_INET:
1772 STREAM_GET(&prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1773 STREAM_GETC(s, prefix.prefixlen);
1774 if (prefix.prefixlen > IPV4_MAX_BITLEN) {
1775 zlog_debug(
1776 "%s: Specified prefix length %d is greater than a v4 address can support",
1777 __PRETTY_FUNCTION__, prefix.prefixlen);
1778 return;
1779 }
1780 STREAM_GET(&gate.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
1781 break;
1782 case AF_INET6:
1783 STREAM_GET(&prefix.u.prefix6, s, 16);
1784 STREAM_GETC(s, prefix.prefixlen);
1785 if (prefix.prefixlen > IPV6_MAX_BITLEN) {
1786 zlog_debug(
1787 "%s: Specified prefix length %d is greater than a v6 address can support",
1788 __PRETTY_FUNCTION__, prefix.prefixlen);
1789 return;
1790 }
1791 STREAM_GET(&gate.ipv6, s, 16);
1792 break;
1793 default:
1794 zlog_debug("%s: Specified AF %d is not supported for this call",
1795 __PRETTY_FUNCTION__, prefix.family);
1796 return;
1797 }
1798 STREAM_GETL(s, ifindex);
1799 STREAM_GETC(s, distance);
1800 STREAM_GETL(s, in_label);
1801 STREAM_GETL(s, out_label);
1802
1803 switch (prefix.family) {
1804 case AF_INET:
1805 if (ifindex)
1806 gtype = NEXTHOP_TYPE_IPV4_IFINDEX;
1807 else
1808 gtype = NEXTHOP_TYPE_IPV4;
1809 break;
1810 case AF_INET6:
1811 if (ifindex)
1812 gtype = NEXTHOP_TYPE_IPV6_IFINDEX;
1813 else
1814 gtype = NEXTHOP_TYPE_IPV6;
1815 break;
1816 default:
1817 return;
1818 }
1819
1820 if (!mpls_enabled)
1821 return;
1822
1823 if (hdr->command == ZEBRA_MPLS_LABELS_ADD) {
1824 mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
1825 ifindex);
1826 mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
1827 distance, out_label);
1828 } else if (hdr->command == ZEBRA_MPLS_LABELS_DELETE) {
1829 mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
1830 mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
1831 distance, out_label);
1832 }
1833 stream_failure:
1834 return;
1835 }
1836
1837 /* Send response to a table manager connect request to client */
1838 static void zread_table_manager_connect(struct zserv *client,
1839 struct stream *msg, vrf_id_t vrf_id)
1840 {
1841 struct stream *s;
1842 uint8_t proto;
1843 uint16_t instance;
1844
1845 s = msg;
1846
1847 /* Get data. */
1848 STREAM_GETC(s, proto);
1849 STREAM_GETW(s, instance);
1850
1851 /* accept only dynamic routing protocols */
1852 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1853 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1854 "client %d has wrong protocol %s", client->sock,
1855 zebra_route_string(proto));
1856 zsend_table_manager_connect_response(client, vrf_id, 1);
1857 return;
1858 }
1859 zlog_notice("client %d with vrf %u instance %u connected as %s",
1860 client->sock, vrf_id, instance, zebra_route_string(proto));
1861 client->proto = proto;
1862 client->instance = instance;
1863
1864 /*
1865 * Release previous labels of same protocol and instance.
1866 * This is done in case it restarted from an unexpected shutdown.
1867 */
1868 release_daemon_table_chunks(client);
1869
1870 zsend_table_manager_connect_response(client, vrf_id, 0);
1871
1872 stream_failure:
1873 return;
1874 }
1875
1876 static void zread_label_manager_connect(struct zserv *client,
1877 struct stream *msg, vrf_id_t vrf_id)
1878 {
1879 struct stream *s;
1880 /* type of protocol (lib/zebra.h) */
1881 uint8_t proto;
1882 unsigned short instance;
1883
1884 /* Get input stream. */
1885 s = msg;
1886
1887 /* Get data. */
1888 STREAM_GETC(s, proto);
1889 STREAM_GETW(s, instance);
1890
1891 /* accept only dynamic routing protocols */
1892 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1893 flog_err(EC_ZEBRA_TM_WRONG_PROTO,
1894 "client %d has wrong protocol %s", client->sock,
1895 zebra_route_string(proto));
1896 zsend_label_manager_connect_response(client, vrf_id, 1);
1897 return;
1898 }
1899
1900 /* recall proto and instance in this socket */
1901 client->proto = proto;
1902 client->instance = instance;
1903
1904 /* call hook for connection using wrapper */
1905 lm_client_connect_call(proto, instance, vrf_id);
1906
1907 stream_failure:
1908 return;
1909 }
1910
1911 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
1912 vrf_id_t vrf_id)
1913 {
1914 struct stream *s;
1915 uint8_t keep;
1916 uint32_t size, base;
1917 struct label_manager_chunk *lmc = NULL;
1918 uint8_t proto;
1919 unsigned short instance;
1920
1921 /* Get input stream. */
1922 s = msg;
1923
1924 /* Get data. */
1925 STREAM_GETC(s, proto);
1926 STREAM_GETW(s, instance);
1927 STREAM_GETC(s, keep);
1928 STREAM_GETL(s, size);
1929 STREAM_GETL(s, base);
1930
1931 /* call hook to get a chunk using wrapper */
1932 lm_get_chunk_call(&lmc, proto, instance, keep, size, base, vrf_id);
1933
1934 if (!lmc)
1935 flog_err(
1936 EC_ZEBRA_LM_CANNOT_ASSIGN_CHUNK,
1937 "Unable to assign Label Chunk of size %u to %s instance %u",
1938 size, zebra_route_string(proto), instance);
1939 else
1940 if (IS_ZEBRA_DEBUG_PACKET)
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_with_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 }
FRRouting mirror