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zebra: flog_warn conversion
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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/rib.h"
46 #include "zebra/zebra_memory.h"
47 #include "zebra/zebra_ns.h"
48 #include "zebra/zebra_vrf.h"
49 #include "zebra/router-id.h"
50 #include "zebra/redistribute.h"
51 #include "zebra/debug.h"
52 #include "zebra/zebra_rnh.h"
53 #include "zebra/rt_netlink.h"
54 #include "zebra/interface.h"
55 #include "zebra/zebra_ptm.h"
56 #include "zebra/rtadv.h"
57 #include "zebra/zebra_mpls.h"
58 #include "zebra/zebra_mroute.h"
59 #include "zebra/label_manager.h"
60 #include "zebra/zebra_vxlan.h"
61 #include "zebra/rt.h"
62 #include "zebra/zebra_pbr.h"
63 #include "zebra/table_manager.h"
64 #include "zebra/zapi_msg.h"
65
66 /* Encoding helpers -------------------------------------------------------- */
67
68 static void zserv_encode_interface(struct stream *s, struct interface *ifp)
69 {
70 /* Interface information. */
71 stream_put(s, ifp->name, INTERFACE_NAMSIZ);
72 stream_putl(s, ifp->ifindex);
73 stream_putc(s, ifp->status);
74 stream_putq(s, ifp->flags);
75 stream_putc(s, ifp->ptm_enable);
76 stream_putc(s, ifp->ptm_status);
77 stream_putl(s, ifp->metric);
78 stream_putl(s, ifp->speed);
79 stream_putl(s, ifp->mtu);
80 stream_putl(s, ifp->mtu6);
81 stream_putl(s, ifp->bandwidth);
82 stream_putl(s, ifp->ll_type);
83 stream_putl(s, ifp->hw_addr_len);
84 if (ifp->hw_addr_len)
85 stream_put(s, ifp->hw_addr, ifp->hw_addr_len);
86
87 /* Then, Traffic Engineering parameters if any */
88 if (HAS_LINK_PARAMS(ifp) && IS_LINK_PARAMS_SET(ifp->link_params)) {
89 stream_putc(s, 1);
90 zebra_interface_link_params_write(s, ifp);
91 } else
92 stream_putc(s, 0);
93
94 /* Write packet size. */
95 stream_putw_at(s, 0, stream_get_endp(s));
96 }
97
98 static void zserv_encode_vrf(struct stream *s, struct zebra_vrf *zvrf)
99 {
100 struct vrf_data data;
101 const char *netns_name = zvrf_ns_name(zvrf);
102
103 data.l.table_id = zvrf->table_id;
104
105 if (netns_name)
106 strlcpy(data.l.netns_name, basename((char *)netns_name),
107 NS_NAMSIZ);
108 else
109 memset(data.l.netns_name, 0, NS_NAMSIZ);
110 /* Pass the tableid and the netns NAME */
111 stream_put(s, &data, sizeof(struct vrf_data));
112 /* Interface information. */
113 stream_put(s, zvrf_name(zvrf), VRF_NAMSIZ);
114 /* Write packet size. */
115 stream_putw_at(s, 0, stream_get_endp(s));
116 }
117
118 static int zserv_encode_nexthop(struct stream *s, struct nexthop *nexthop)
119 {
120 stream_putc(s, nexthop->type);
121 switch (nexthop->type) {
122 case NEXTHOP_TYPE_IPV4:
123 case NEXTHOP_TYPE_IPV4_IFINDEX:
124 stream_put_in_addr(s, &nexthop->gate.ipv4);
125 stream_putl(s, nexthop->ifindex);
126 break;
127 case NEXTHOP_TYPE_IPV6:
128 stream_put(s, &nexthop->gate.ipv6, 16);
129 break;
130 case NEXTHOP_TYPE_IPV6_IFINDEX:
131 stream_put(s, &nexthop->gate.ipv6, 16);
132 stream_putl(s, nexthop->ifindex);
133 break;
134 case NEXTHOP_TYPE_IFINDEX:
135 stream_putl(s, nexthop->ifindex);
136 break;
137 default:
138 /* do nothing */
139 break;
140 }
141 return 1;
142 }
143
144 /* Send handlers ----------------------------------------------------------- */
145
146 /* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */
147 /*
148 * This function is called in the following situations:
149 * - in response to a 3-byte ZEBRA_INTERFACE_ADD request
150 * from the client.
151 * - at startup, when zebra figures out the available interfaces
152 * - when an interface is added (where support for
153 * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
154 * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
155 * received)
156 */
157 int zsend_interface_add(struct zserv *client, struct interface *ifp)
158 {
159 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
160
161 zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf_id);
162 zserv_encode_interface(s, ifp);
163
164 client->ifadd_cnt++;
165 return zserv_send_message(client, s);
166 }
167
168 /* Interface deletion from zebra daemon. */
169 int zsend_interface_delete(struct zserv *client, struct interface *ifp)
170 {
171 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
172
173 zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf_id);
174 zserv_encode_interface(s, ifp);
175
176 client->ifdel_cnt++;
177 return zserv_send_message(client, s);
178 }
179
180 int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf)
181 {
182 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
183
184 zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf));
185 zserv_encode_vrf(s, zvrf);
186
187 client->vrfadd_cnt++;
188 return zserv_send_message(client, s);
189 }
190
191 /* VRF deletion from zebra daemon. */
192 int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf)
193
194 {
195 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
196
197 zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf));
198 zserv_encode_vrf(s, zvrf);
199
200 client->vrfdel_cnt++;
201 return zserv_send_message(client, s);
202 }
203
204 int zsend_interface_link_params(struct zserv *client, struct interface *ifp)
205 {
206 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
207
208 /* Check this client need interface information. */
209 if (!client->ifinfo) {
210 stream_free(s);
211 return 0;
212 }
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 [<secondary>|<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 secondary"
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(zebrad.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(zebrad.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 ifIndex of the interface and its new VRF (id) */
434 stream_putl(s, ifp->ifindex);
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
527 memset(&api, 0, sizeof(api));
528 api.vrf_id = re->vrf_id;
529 api.type = re->type;
530 api.instance = re->instance;
531 api.flags = re->flags;
532
533 afi = family2afi(p->family);
534 switch (afi) {
535 case AFI_IP:
536 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
537 client->redist_v4_add_cnt++;
538 else
539 client->redist_v4_del_cnt++;
540 break;
541 case AFI_IP6:
542 if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
543 client->redist_v6_add_cnt++;
544 else
545 client->redist_v6_del_cnt++;
546 break;
547 default:
548 break;
549 }
550
551 /* Prefix. */
552 api.prefix = *p;
553 if (src_p) {
554 SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX);
555 memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix));
556 }
557
558 /* Nexthops. */
559 if (re->nexthop_active_num) {
560 SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
561 api.nexthop_num = re->nexthop_active_num;
562 }
563 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) {
564 if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
565 continue;
566
567 api_nh = &api.nexthops[count];
568 api_nh->vrf_id = nexthop->vrf_id;
569 api_nh->type = nexthop->type;
570 switch (nexthop->type) {
571 case NEXTHOP_TYPE_BLACKHOLE:
572 api_nh->bh_type = nexthop->bh_type;
573 break;
574 case NEXTHOP_TYPE_IPV4:
575 api_nh->gate.ipv4 = nexthop->gate.ipv4;
576 break;
577 case NEXTHOP_TYPE_IPV4_IFINDEX:
578 api_nh->gate.ipv4 = nexthop->gate.ipv4;
579 api_nh->ifindex = nexthop->ifindex;
580 break;
581 case NEXTHOP_TYPE_IFINDEX:
582 api_nh->ifindex = nexthop->ifindex;
583 break;
584 case NEXTHOP_TYPE_IPV6:
585 api_nh->gate.ipv6 = nexthop->gate.ipv6;
586 break;
587 case NEXTHOP_TYPE_IPV6_IFINDEX:
588 api_nh->gate.ipv6 = nexthop->gate.ipv6;
589 api_nh->ifindex = nexthop->ifindex;
590 }
591 count++;
592 }
593
594 /* Attributes. */
595 SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
596 api.distance = re->distance;
597 SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
598 api.metric = re->metric;
599 if (re->tag) {
600 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
601 api.tag = re->tag;
602 }
603 SET_FLAG(api.message, ZAPI_MESSAGE_MTU);
604 api.mtu = re->mtu;
605
606 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
607
608 /* Encode route and send. */
609 if (zapi_route_encode(cmd, s, &api) < 0) {
610 stream_free(s);
611 return -1;
612 }
613
614 if (IS_ZEBRA_DEBUG_SEND) {
615 char buf_prefix[PREFIX_STRLEN];
616
617 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
618
619 zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
620 __func__, zserv_command_string(cmd),
621 zebra_route_string(client->proto),
622 zebra_route_string(api.type), api.vrf_id,
623 buf_prefix);
624 }
625 return zserv_send_message(client, s);
626 }
627
628 /*
629 * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if
630 * nexthop is not found on mrib. Returns both route metric and protocol
631 * distance.
632 */
633 static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
634 struct in_addr addr,
635 struct route_entry *re,
636 struct zebra_vrf *zvrf)
637 {
638 struct stream *s;
639 unsigned long nump;
640 uint8_t num;
641 struct nexthop *nexthop;
642
643 /* Get output stream. */
644 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
645 stream_reset(s);
646
647 /* Fill in result. */
648 zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
649 stream_put_in_addr(s, &addr);
650
651 if (re) {
652 stream_putc(s, re->distance);
653 stream_putl(s, re->metric);
654 num = 0;
655 /* remember position for nexthop_num */
656 nump = stream_get_endp(s);
657 /* reserve room for nexthop_num */
658 stream_putc(s, 0);
659 /*
660 * Only non-recursive routes are elegible to resolve the
661 * nexthop we are looking up. Therefore, we will just iterate
662 * over the top chain of nexthops.
663 */
664 for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next)
665 if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
666 num += zserv_encode_nexthop(s, nexthop);
667
668 /* store nexthop_num */
669 stream_putc_at(s, nump, num);
670 } else {
671 stream_putc(s, 0); /* distance */
672 stream_putl(s, 0); /* metric */
673 stream_putc(s, 0); /* nexthop_num */
674 }
675
676 stream_putw_at(s, 0, stream_get_endp(s));
677
678 return zserv_send_message(client, s);
679 }
680
681 /*
682 * Common utility send route notification, called from a path using a
683 * route_entry and from a path using a dataplane context.
684 */
685 static int route_notify_internal(const struct prefix *p, int type,
686 uint16_t instance, vrf_id_t vrf_id,
687 uint32_t table_id,
688 enum zapi_route_notify_owner note)
689 {
690 struct zserv *client;
691 struct stream *s;
692 uint8_t blen;
693
694 client = zserv_find_client(type, instance);
695 if (!client || !client->notify_owner) {
696 if (IS_ZEBRA_DEBUG_PACKET) {
697 char buff[PREFIX_STRLEN];
698
699 zlog_debug(
700 "Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
701 type, prefix2str(p, buff, sizeof(buff)),
702 table_id, note, vrf_id);
703 }
704 return 0;
705 }
706
707 if (IS_ZEBRA_DEBUG_PACKET) {
708 char buff[PREFIX_STRLEN];
709
710 zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
711 type, prefix2str(p, buff, sizeof(buff)),
712 table_id, note, vrf_id);
713 }
714
715 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
716 stream_reset(s);
717
718 zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
719
720 stream_put(s, &note, sizeof(note));
721
722 stream_putc(s, p->family);
723
724 blen = prefix_blen(p);
725 stream_putc(s, p->prefixlen);
726 stream_put(s, &p->u.prefix, blen);
727
728 stream_putl(s, table_id);
729
730 stream_putw_at(s, 0, stream_get_endp(s));
731
732 return zserv_send_message(client, s);
733 }
734
735 int zsend_route_notify_owner(struct route_entry *re, const struct prefix *p,
736 enum zapi_route_notify_owner note)
737 {
738 return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
739 re->table, note));
740 }
741
742 void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
743 enum zapi_rule_notify_owner note)
744 {
745 struct listnode *node;
746 struct zserv *client;
747 struct stream *s;
748
749 if (IS_ZEBRA_DEBUG_PACKET)
750 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
751 rule->rule.unique);
752
753 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
754 if (rule->sock == client->sock)
755 break;
756 }
757
758 if (!client)
759 return;
760
761 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
762
763 zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, VRF_DEFAULT);
764 stream_put(s, &note, sizeof(note));
765 stream_putl(s, rule->rule.seq);
766 stream_putl(s, rule->rule.priority);
767 stream_putl(s, rule->rule.unique);
768 if (rule->ifp)
769 stream_putl(s, rule->ifp->ifindex);
770 else
771 stream_putl(s, 0);
772
773 stream_putw_at(s, 0, stream_get_endp(s));
774
775 zserv_send_message(client, s);
776 }
777
778 void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
779 enum zapi_ipset_notify_owner note)
780 {
781 struct listnode *node;
782 struct zserv *client;
783 struct stream *s;
784
785 if (IS_ZEBRA_DEBUG_PACKET)
786 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
787 ipset->unique);
788
789 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
790 if (ipset->sock == client->sock)
791 break;
792 }
793
794 if (!client)
795 return;
796
797 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
798
799 zclient_create_header(s, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
800 stream_put(s, &note, sizeof(note));
801 stream_putl(s, ipset->unique);
802 stream_put(s, ipset->ipset_name, ZEBRA_IPSET_NAME_SIZE);
803 stream_putw_at(s, 0, stream_get_endp(s));
804
805 zserv_send_message(client, s);
806 }
807
808 void zsend_ipset_entry_notify_owner(struct zebra_pbr_ipset_entry *ipset,
809 enum zapi_ipset_entry_notify_owner note)
810 {
811 struct listnode *node;
812 struct zserv *client;
813 struct stream *s;
814
815 if (IS_ZEBRA_DEBUG_PACKET)
816 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
817 ipset->unique);
818
819 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
820 if (ipset->sock == client->sock)
821 break;
822 }
823
824 if (!client)
825 return;
826
827 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
828
829 zclient_create_header(s, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
830 stream_put(s, &note, sizeof(note));
831 stream_putl(s, ipset->unique);
832 stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
833 stream_putw_at(s, 0, stream_get_endp(s));
834
835 zserv_send_message(client, s);
836 }
837
838 void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
839 enum zapi_iptable_notify_owner note)
840 {
841 struct listnode *node;
842 struct zserv *client;
843 struct stream *s;
844
845 if (IS_ZEBRA_DEBUG_PACKET)
846 zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
847 iptable->unique);
848
849 for (ALL_LIST_ELEMENTS_RO(zebrad.client_list, node, client)) {
850 if (iptable->sock == client->sock)
851 break;
852 }
853
854 if (!client)
855 return;
856
857 s = stream_new(ZEBRA_MAX_PACKET_SIZ);
858
859 zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
860 stream_put(s, &note, sizeof(note));
861 stream_putl(s, iptable->unique);
862 stream_putw_at(s, 0, stream_get_endp(s));
863
864 zserv_send_message(client, s);
865 }
866
867 /* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
868 int zsend_router_id_update(struct zserv *client, struct prefix *p,
869 vrf_id_t vrf_id)
870 {
871 int blen;
872
873 /* Check this client need interface information. */
874 if (!vrf_bitmap_check(client->ridinfo, vrf_id))
875 return 0;
876
877 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
878
879 /* Message type. */
880 zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id);
881
882 /* Prefix information. */
883 stream_putc(s, p->family);
884 blen = prefix_blen(p);
885 stream_put(s, &p->u.prefix, blen);
886 stream_putc(s, p->prefixlen);
887
888 /* Write packet size. */
889 stream_putw_at(s, 0, stream_get_endp(s));
890
891 return zserv_send_message(client, s);
892 }
893
894 /*
895 * Function used by Zebra to send a PW status update to LDP daemon
896 */
897 int zsend_pw_update(struct zserv *client, struct zebra_pw *pw)
898 {
899 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
900
901 zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id);
902 stream_write(s, pw->ifname, IF_NAMESIZE);
903 stream_putl(s, pw->ifindex);
904 stream_putl(s, pw->status);
905
906 /* Put length at the first point of the stream. */
907 stream_putw_at(s, 0, stream_get_endp(s));
908
909 return zserv_send_message(client, s);
910 }
911
912 /* Send response to a get label chunk request to client */
913 static int zsend_assign_label_chunk_response(struct zserv *client,
914 vrf_id_t vrf_id,
915 struct label_manager_chunk *lmc)
916 {
917 int ret;
918 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
919
920 zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
921
922 if (lmc) {
923 /* proto */
924 stream_putc(s, lmc->proto);
925 /* instance */
926 stream_putw(s, lmc->instance);
927 /* keep */
928 stream_putc(s, lmc->keep);
929 /* start and end labels */
930 stream_putl(s, lmc->start);
931 stream_putl(s, lmc->end);
932 }
933
934 /* Write packet size. */
935 stream_putw_at(s, 0, stream_get_endp(s));
936
937 ret = writen(client->sock, s->data, stream_get_endp(s));
938 stream_free(s);
939 return ret;
940 }
941
942 /* Send response to a label manager connect request to client */
943 static int zsend_label_manager_connect_response(struct zserv *client,
944 vrf_id_t vrf_id,
945 unsigned short result)
946 {
947 int ret;
948 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
949
950 zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id);
951
952 /* proto */
953 stream_putc(s, client->proto);
954
955 /* instance */
956 stream_putw(s, client->instance);
957
958 /* result */
959 stream_putc(s, result);
960
961 /* Write packet size. */
962 stream_putw_at(s, 0, stream_get_endp(s));
963
964 ret = writen(client->sock, s->data, stream_get_endp(s));
965 stream_free(s);
966
967 return ret;
968 }
969
970 /* Send response to a get table chunk request to client */
971 static int zsend_assign_table_chunk_response(struct zserv *client,
972 vrf_id_t vrf_id,
973 struct table_manager_chunk *tmc)
974 {
975 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
976
977 zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id);
978
979 if (tmc) {
980 /* start and end labels */
981 stream_putl(s, tmc->start);
982 stream_putl(s, tmc->end);
983 }
984
985 /* Write packet size. */
986 stream_putw_at(s, 0, stream_get_endp(s));
987
988 return zserv_send_message(client, s);
989 }
990
991 static int zsend_table_manager_connect_response(struct zserv *client,
992 vrf_id_t vrf_id,
993 uint16_t result)
994 {
995 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
996
997 zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id);
998
999 /* result */
1000 stream_putc(s, result);
1001
1002 stream_putw_at(s, 0, stream_get_endp(s));
1003
1004 return zserv_send_message(client, s);
1005 }
1006
1007 /* Inbound message handling ------------------------------------------------ */
1008
1009 int cmd2type[] = {
1010 [ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
1011 [ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
1012 [ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
1013 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
1014 };
1015
1016 /* Nexthop register */
1017 static void zread_rnh_register(ZAPI_HANDLER_ARGS)
1018 {
1019 struct rnh *rnh;
1020 struct stream *s;
1021 struct prefix p;
1022 unsigned short l = 0;
1023 uint8_t flags = 0;
1024 uint16_t type = cmd2type[hdr->command];
1025 bool exist;
1026
1027 if (IS_ZEBRA_DEBUG_NHT)
1028 zlog_debug(
1029 "rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
1030 zebra_route_string(client->proto), hdr->length,
1031 (type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
1032 zvrf->vrf->vrf_id);
1033
1034 s = msg;
1035
1036 client->nh_reg_time = monotime(NULL);
1037
1038 while (l < hdr->length) {
1039 STREAM_GETC(s, flags);
1040 STREAM_GETW(s, p.family);
1041 STREAM_GETC(s, p.prefixlen);
1042 l += 4;
1043 if (p.family == AF_INET) {
1044 if (p.prefixlen > IPV4_MAX_BITLEN) {
1045 zlog_debug(
1046 "%s: Specified prefix hdr->length %d is too large for a v4 address",
1047 __PRETTY_FUNCTION__, p.prefixlen);
1048 return;
1049 }
1050 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1051 l += IPV4_MAX_BYTELEN;
1052 } else if (p.family == AF_INET6) {
1053 if (p.prefixlen > IPV6_MAX_BITLEN) {
1054 zlog_debug(
1055 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1056 __PRETTY_FUNCTION__, p.prefixlen);
1057 return;
1058 }
1059 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1060 l += IPV6_MAX_BYTELEN;
1061 } else {
1062 flog_err(
1063 ZEBRA_ERR_UNKNOWN_FAMILY,
1064 "rnh_register: Received unknown family type %d\n",
1065 p.family);
1066 return;
1067 }
1068 rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
1069 if (!rnh)
1070 return;
1071
1072 if (type == RNH_NEXTHOP_TYPE) {
1073 if (flags
1074 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1075 SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1076 else if (!flags
1077 && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
1078 UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
1079 } else if (type == RNH_IMPORT_CHECK_TYPE) {
1080 if (flags
1081 && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
1082 SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1083 else if (!flags
1084 && CHECK_FLAG(rnh->flags,
1085 ZEBRA_NHT_EXACT_MATCH))
1086 UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
1087 }
1088
1089 zebra_add_rnh_client(rnh, client, type, zvrf_id(zvrf));
1090 /* Anything not AF_INET/INET6 has been filtered out above */
1091 if (!exist)
1092 zebra_evaluate_rnh(zvrf_id(zvrf), p.family, 1, type,
1093 &p);
1094 }
1095
1096 stream_failure:
1097 return;
1098 }
1099
1100 /* Nexthop register */
1101 static void zread_rnh_unregister(ZAPI_HANDLER_ARGS)
1102 {
1103 struct rnh *rnh;
1104 struct stream *s;
1105 struct prefix p;
1106 unsigned short l = 0;
1107 uint16_t type = cmd2type[hdr->command];
1108
1109 if (IS_ZEBRA_DEBUG_NHT)
1110 zlog_debug(
1111 "rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
1112 zebra_route_string(client->proto), hdr->length,
1113 zvrf->vrf->vrf_id);
1114
1115 s = msg;
1116
1117 while (l < hdr->length) {
1118 uint8_t flags;
1119
1120 STREAM_GETC(s, flags);
1121 if (flags != 0)
1122 goto stream_failure;
1123
1124 STREAM_GETW(s, p.family);
1125 STREAM_GETC(s, p.prefixlen);
1126 l += 4;
1127 if (p.family == AF_INET) {
1128 if (p.prefixlen > IPV4_MAX_BITLEN) {
1129 zlog_debug(
1130 "%s: Specified prefix hdr->length %d is to large for a v4 address",
1131 __PRETTY_FUNCTION__, p.prefixlen);
1132 return;
1133 }
1134 STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1135 l += IPV4_MAX_BYTELEN;
1136 } else if (p.family == AF_INET6) {
1137 if (p.prefixlen > IPV6_MAX_BITLEN) {
1138 zlog_debug(
1139 "%s: Specified prefix hdr->length %d is to large for a v6 address",
1140 __PRETTY_FUNCTION__, p.prefixlen);
1141 return;
1142 }
1143 STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN);
1144 l += IPV6_MAX_BYTELEN;
1145 } else {
1146 flog_err(
1147 ZEBRA_ERR_UNKNOWN_FAMILY,
1148 "rnh_register: Received unknown family type %d\n",
1149 p.family);
1150 return;
1151 }
1152 rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
1153 if (rnh) {
1154 client->nh_dereg_time = monotime(NULL);
1155 zebra_remove_rnh_client(rnh, client, type);
1156 }
1157 }
1158 stream_failure:
1159 return;
1160 }
1161
1162 #define ZEBRA_MIN_FEC_LENGTH 5
1163
1164 /* FEC register */
1165 static void zread_fec_register(ZAPI_HANDLER_ARGS)
1166 {
1167 struct stream *s;
1168 unsigned short l = 0;
1169 struct prefix p;
1170 uint16_t flags;
1171 uint32_t label_index = MPLS_INVALID_LABEL_INDEX;
1172
1173 s = msg;
1174 zvrf = vrf_info_lookup(VRF_DEFAULT);
1175 if (!zvrf)
1176 return;
1177
1178 /*
1179 * The minimum amount of data that can be sent for one fec
1180 * registration
1181 */
1182 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1183 flog_err(
1184 ZEBRA_ERR_IRDP_LEN_MISMATCH,
1185 "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode",
1186 hdr->length);
1187 return;
1188 }
1189
1190 while (l < hdr->length) {
1191 STREAM_GETW(s, flags);
1192 memset(&p, 0, sizeof(p));
1193 STREAM_GETW(s, p.family);
1194 if (p.family != AF_INET && p.family != AF_INET6) {
1195 flog_err(
1196 ZEBRA_ERR_UNKNOWN_FAMILY,
1197 "fec_register: Received unknown family type %d\n",
1198 p.family);
1199 return;
1200 }
1201 STREAM_GETC(s, p.prefixlen);
1202 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1203 || (p.family == AF_INET6
1204 && p.prefixlen > IPV6_MAX_BITLEN)) {
1205 zlog_debug(
1206 "%s: Specified prefix hdr->length: %d is to long for %d",
1207 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1208 return;
1209 }
1210 l += 5;
1211 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1212 l += PSIZE(p.prefixlen);
1213 if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) {
1214 STREAM_GETL(s, label_index);
1215 l += 4;
1216 } else
1217 label_index = MPLS_INVALID_LABEL_INDEX;
1218 zebra_mpls_fec_register(zvrf, &p, label_index, client);
1219 }
1220
1221 stream_failure:
1222 return;
1223 }
1224
1225 /* FEC unregister */
1226 static void zread_fec_unregister(ZAPI_HANDLER_ARGS)
1227 {
1228 struct stream *s;
1229 unsigned short l = 0;
1230 struct prefix p;
1231 uint16_t flags;
1232
1233 s = msg;
1234 zvrf = vrf_info_lookup(VRF_DEFAULT);
1235 if (!zvrf)
1236 return;
1237
1238 /*
1239 * The minimum amount of data that can be sent for one
1240 * fec unregistration
1241 */
1242 if (hdr->length < ZEBRA_MIN_FEC_LENGTH) {
1243 flog_err(
1244 ZEBRA_ERR_IRDP_LEN_MISMATCH,
1245 "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode",
1246 hdr->length);
1247 return;
1248 }
1249
1250 while (l < hdr->length) {
1251 STREAM_GETW(s, flags);
1252 if (flags != 0)
1253 goto stream_failure;
1254
1255 memset(&p, 0, sizeof(p));
1256 STREAM_GETW(s, p.family);
1257 if (p.family != AF_INET && p.family != AF_INET6) {
1258 flog_err(
1259 ZEBRA_ERR_UNKNOWN_FAMILY,
1260 "fec_unregister: Received unknown family type %d\n",
1261 p.family);
1262 return;
1263 }
1264 STREAM_GETC(s, p.prefixlen);
1265 if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN)
1266 || (p.family == AF_INET6
1267 && p.prefixlen > IPV6_MAX_BITLEN)) {
1268 zlog_debug(
1269 "%s: Received prefix hdr->length %d which is greater than %d can support",
1270 __PRETTY_FUNCTION__, p.prefixlen, p.family);
1271 return;
1272 }
1273 l += 5;
1274 STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen));
1275 l += PSIZE(p.prefixlen);
1276 zebra_mpls_fec_unregister(zvrf, &p, client);
1277 }
1278
1279 stream_failure:
1280 return;
1281 }
1282
1283
1284 /*
1285 * Register zebra server interface information.
1286 * Send current all interface and address information.
1287 */
1288 static void zread_interface_add(ZAPI_HANDLER_ARGS)
1289 {
1290 struct vrf *vrf;
1291 struct interface *ifp;
1292
1293 /* Interface information is needed. */
1294 vrf_bitmap_set(client->ifinfo, zvrf_id(zvrf));
1295
1296 RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
1297 FOR_ALL_INTERFACES (vrf, ifp) {
1298 /* Skip pseudo interface. */
1299 if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE))
1300 continue;
1301
1302 zsend_interface_add(client, ifp);
1303 zsend_interface_addresses(client, ifp);
1304 }
1305 }
1306 }
1307
1308 /* Unregister zebra server interface information. */
1309 static void zread_interface_delete(ZAPI_HANDLER_ARGS)
1310 {
1311 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1312 }
1313
1314 void zserv_nexthop_num_warn(const char *caller, const struct prefix *p,
1315 const unsigned int nexthop_num)
1316 {
1317 if (nexthop_num > multipath_num) {
1318 char buff[PREFIX2STR_BUFFER];
1319
1320 prefix2str(p, buff, sizeof(buff));
1321 flog_warn(
1322 ZEBRA_ERR_MORE_NH_THAN_MULTIPATH,
1323 "%s: Prefix %s has %d nexthops, but we can only use the first %d",
1324 caller, buff, nexthop_num, multipath_num);
1325 }
1326 }
1327
1328 static void zread_route_add(ZAPI_HANDLER_ARGS)
1329 {
1330 struct stream *s;
1331 struct zapi_route api;
1332 struct zapi_nexthop *api_nh;
1333 afi_t afi;
1334 struct prefix_ipv6 *src_p = NULL;
1335 struct route_entry *re;
1336 struct nexthop *nexthop = NULL;
1337 int i, ret;
1338 vrf_id_t vrf_id = 0;
1339 struct ipaddr vtep_ip;
1340
1341 s = msg;
1342 if (zapi_route_decode(s, &api) < 0) {
1343 if (IS_ZEBRA_DEBUG_RECV)
1344 zlog_debug("%s: Unable to decode zapi_route sent",
1345 __PRETTY_FUNCTION__);
1346 return;
1347 }
1348
1349 if (IS_ZEBRA_DEBUG_RECV) {
1350 char buf_prefix[PREFIX_STRLEN];
1351
1352 prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
1353 zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
1354 __func__, buf_prefix,
1355 (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
1356 : "un"),
1357 api.flags);
1358 }
1359
1360 /* Allocate new route. */
1361 vrf_id = zvrf_id(zvrf);
1362 re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
1363 re->type = api.type;
1364 re->instance = api.instance;
1365 re->flags = api.flags;
1366 re->uptime = time(NULL);
1367 re->vrf_id = vrf_id;
1368 if (api.tableid && vrf_id == VRF_DEFAULT)
1369 re->table = api.tableid;
1370 else
1371 re->table = zvrf->table_id;
1372
1373 /*
1374 * TBD should _all_ of the nexthop add operations use
1375 * api_nh->vrf_id instead of re->vrf_id ? I only changed
1376 * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6.
1377 */
1378 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP))
1379 for (i = 0; i < api.nexthop_num; i++) {
1380 api_nh = &api.nexthops[i];
1381 ifindex_t ifindex = 0;
1382
1383 if (IS_ZEBRA_DEBUG_RECV)
1384 zlog_debug("nh type %d", api_nh->type);
1385
1386 switch (api_nh->type) {
1387 case NEXTHOP_TYPE_IFINDEX:
1388 nexthop = route_entry_nexthop_ifindex_add(
1389 re, api_nh->ifindex, api_nh->vrf_id);
1390 break;
1391 case NEXTHOP_TYPE_IPV4:
1392 if (IS_ZEBRA_DEBUG_RECV) {
1393 char nhbuf[INET6_ADDRSTRLEN] = {0};
1394
1395 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1396 nhbuf, INET6_ADDRSTRLEN);
1397 zlog_debug("%s: nh=%s, vrf_id=%d",
1398 __func__, nhbuf,
1399 api_nh->vrf_id);
1400 }
1401 nexthop = route_entry_nexthop_ipv4_add(
1402 re, &api_nh->gate.ipv4, NULL,
1403 api_nh->vrf_id);
1404 break;
1405 case NEXTHOP_TYPE_IPV4_IFINDEX:
1406
1407 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1408 if (CHECK_FLAG(api.flags,
1409 ZEBRA_FLAG_EVPN_ROUTE)) {
1410 ifindex = get_l3vni_svi_ifindex(vrf_id);
1411 } else {
1412 ifindex = api_nh->ifindex;
1413 }
1414
1415 if (IS_ZEBRA_DEBUG_RECV) {
1416 char nhbuf[INET6_ADDRSTRLEN] = {0};
1417
1418 inet_ntop(AF_INET, &api_nh->gate.ipv4,
1419 nhbuf, INET6_ADDRSTRLEN);
1420 zlog_debug(
1421 "%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
1422 __func__, nhbuf, api_nh->vrf_id,
1423 re->vrf_id, ifindex);
1424 }
1425 nexthop = route_entry_nexthop_ipv4_ifindex_add(
1426 re, &api_nh->gate.ipv4, NULL, ifindex,
1427 api_nh->vrf_id);
1428
1429 /* if this an EVPN route entry,
1430 * program the nh as neigh
1431 */
1432 if (CHECK_FLAG(api.flags,
1433 ZEBRA_FLAG_EVPN_ROUTE)) {
1434 SET_FLAG(nexthop->flags,
1435 NEXTHOP_FLAG_EVPN_RVTEP);
1436 vtep_ip.ipa_type = IPADDR_V4;
1437 memcpy(&(vtep_ip.ipaddr_v4),
1438 &(api_nh->gate.ipv4),
1439 sizeof(struct in_addr));
1440 zebra_vxlan_evpn_vrf_route_add(
1441 vrf_id, &api_nh->rmac, &vtep_ip,
1442 &api.prefix);
1443 }
1444 break;
1445 case NEXTHOP_TYPE_IPV6:
1446 nexthop = route_entry_nexthop_ipv6_add(
1447 re, &api_nh->gate.ipv6, api_nh->vrf_id);
1448 break;
1449 case NEXTHOP_TYPE_IPV6_IFINDEX:
1450 memset(&vtep_ip, 0, sizeof(struct ipaddr));
1451 if (CHECK_FLAG(api.flags,
1452 ZEBRA_FLAG_EVPN_ROUTE)) {
1453 ifindex = get_l3vni_svi_ifindex(vrf_id);
1454 } else {
1455 ifindex = api_nh->ifindex;
1456 }
1457
1458 nexthop = route_entry_nexthop_ipv6_ifindex_add(
1459 re, &api_nh->gate.ipv6, ifindex,
1460 api_nh->vrf_id);
1461
1462 /* if this an EVPN route entry,
1463 * program the nh as neigh
1464 */
1465 if (CHECK_FLAG(api.flags,
1466 ZEBRA_FLAG_EVPN_ROUTE)) {
1467 SET_FLAG(nexthop->flags,
1468 NEXTHOP_FLAG_EVPN_RVTEP);
1469 vtep_ip.ipa_type = IPADDR_V6;
1470 memcpy(&vtep_ip.ipaddr_v6,
1471 &(api_nh->gate.ipv6),
1472 sizeof(struct in6_addr));
1473 zebra_vxlan_evpn_vrf_route_add(
1474 vrf_id, &api_nh->rmac, &vtep_ip,
1475 &api.prefix);
1476 }
1477 break;
1478 case NEXTHOP_TYPE_BLACKHOLE:
1479 nexthop = route_entry_nexthop_blackhole_add(
1480 re, api_nh->bh_type);
1481 break;
1482 }
1483
1484 if (!nexthop) {
1485 flog_warn(
1486 ZEBRA_ERR_NEXTHOP_CREATION_FAILED,
1487 "%s: Nexthops Specified: %d but we failed to properly create one",
1488 __PRETTY_FUNCTION__, api.nexthop_num);
1489 nexthops_free(re->ng.nexthop);
1490 XFREE(MTYPE_RE, re);
1491 return;
1492 }
1493 /* MPLS labels for BGP-LU or Segment Routing */
1494 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
1495 && api_nh->type != NEXTHOP_TYPE_IFINDEX
1496 && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
1497 enum lsp_types_t label_type;
1498
1499 label_type =
1500 lsp_type_from_re_type(client->proto);
1501
1502 if (IS_ZEBRA_DEBUG_RECV) {
1503 zlog_debug(
1504 "%s: adding %d labels of type %d (1st=%u)",
1505 __func__, api_nh->label_num,
1506 label_type, api_nh->labels[0]);
1507 }
1508
1509 nexthop_add_labels(nexthop, label_type,
1510 api_nh->label_num,
1511 &api_nh->labels[0]);
1512 }
1513 }
1514
1515 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
1516 re->distance = api.distance;
1517 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
1518 re->metric = api.metric;
1519 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
1520 re->tag = api.tag;
1521 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
1522 re->mtu = api.mtu;
1523
1524 afi = family2afi(api.prefix.family);
1525 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1526 flog_warn(ZEBRA_ERR_RX_SRCDEST_WRONG_AFI,
1527 "%s: Received SRC Prefix but afi is not v6",
1528 __PRETTY_FUNCTION__);
1529 nexthops_free(re->ng.nexthop);
1530 XFREE(MTYPE_RE, re);
1531 return;
1532 }
1533 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1534 src_p = &api.src_prefix;
1535
1536 ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
1537
1538 /* Stats */
1539 switch (api.prefix.family) {
1540 case AF_INET:
1541 if (ret > 0)
1542 client->v4_route_add_cnt++;
1543 else if (ret < 0)
1544 client->v4_route_upd8_cnt++;
1545 break;
1546 case AF_INET6:
1547 if (ret > 0)
1548 client->v6_route_add_cnt++;
1549 else if (ret < 0)
1550 client->v6_route_upd8_cnt++;
1551 break;
1552 }
1553 }
1554
1555 static void zread_route_del(ZAPI_HANDLER_ARGS)
1556 {
1557 struct stream *s;
1558 struct zapi_route api;
1559 afi_t afi;
1560 struct prefix_ipv6 *src_p = NULL;
1561 uint32_t table_id;
1562
1563 s = msg;
1564 if (zapi_route_decode(s, &api) < 0)
1565 return;
1566
1567 afi = family2afi(api.prefix.family);
1568 if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) {
1569 flog_warn(ZEBRA_ERR_RX_SRCDEST_WRONG_AFI,
1570 "%s: Received a src prefix while afi is not v6",
1571 __PRETTY_FUNCTION__);
1572 return;
1573 }
1574 if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
1575 src_p = &api.src_prefix;
1576
1577 if (api.vrf_id == VRF_DEFAULT && api.tableid != 0)
1578 table_id = api.tableid;
1579 else
1580 table_id = zvrf->table_id;
1581
1582 rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
1583 api.flags, &api.prefix, src_p, NULL, table_id, api.metric,
1584 api.distance, false);
1585
1586 /* Stats */
1587 switch (api.prefix.family) {
1588 case AF_INET:
1589 client->v4_route_del_cnt++;
1590 break;
1591 case AF_INET6:
1592 client->v6_route_del_cnt++;
1593 break;
1594 }
1595 }
1596
1597 /* MRIB Nexthop lookup for IPv4. */
1598 static void zread_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
1599 {
1600 struct in_addr addr;
1601 struct route_entry *re;
1602
1603 STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
1604 re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
1605 zsend_ipv4_nexthop_lookup_mrib(client, addr, re, zvrf);
1606
1607 stream_failure:
1608 return;
1609 }
1610
1611 /* Register zebra server router-id information. Send current router-id */
1612 static void zread_router_id_add(ZAPI_HANDLER_ARGS)
1613 {
1614 struct prefix p;
1615
1616 /* Router-id information is needed. */
1617 vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
1618
1619 router_id_get(&p, zvrf_id(zvrf));
1620
1621 zsend_router_id_update(client, &p, zvrf_id(zvrf));
1622 }
1623
1624 /* Unregister zebra server router-id information. */
1625 static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
1626 {
1627 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1628 }
1629
1630 static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf)
1631 {
1632 struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
1633
1634 zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id);
1635 stream_putc(s, mpls_enabled);
1636 stream_putl(s, multipath_num);
1637
1638 stream_putw_at(s, 0, stream_get_endp(s));
1639 zserv_send_message(client, s);
1640 }
1641
1642 /* Tie up route-type and client->sock */
1643 static void zread_hello(ZAPI_HANDLER_ARGS)
1644 {
1645 /* type of protocol (lib/zebra.h) */
1646 uint8_t proto;
1647 unsigned short instance;
1648 uint8_t notify;
1649
1650 STREAM_GETC(msg, proto);
1651 STREAM_GETW(msg, instance);
1652 STREAM_GETC(msg, notify);
1653 if (notify)
1654 client->notify_owner = true;
1655
1656 /* accept only dynamic routing protocols */
1657 if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) {
1658 zlog_notice(
1659 "client %d says hello and bids fair to announce only %s routes vrf=%u",
1660 client->sock, zebra_route_string(proto),
1661 zvrf->vrf->vrf_id);
1662 if (instance)
1663 zlog_notice("client protocol instance %d", instance);
1664
1665 client->proto = proto;
1666 client->instance = instance;
1667 }
1668
1669 zsend_capabilities(client, zvrf);
1670 stream_failure:
1671 return;
1672 }
1673
1674 /* Unregister all information in a VRF. */
1675 static void zread_vrf_unregister(ZAPI_HANDLER_ARGS)
1676 {
1677 int i;
1678 afi_t afi;
1679
1680 for (afi = AFI_IP; afi < AFI_MAX; afi++)
1681 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
1682 vrf_bitmap_unset(client->redist[afi][i], zvrf_id(zvrf));
1683 vrf_bitmap_unset(client->redist_default, zvrf_id(zvrf));
1684 vrf_bitmap_unset(client->ifinfo, zvrf_id(zvrf));
1685 vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
1686 }
1687
1688 static void zread_mpls_labels(ZAPI_HANDLER_ARGS)
1689 {
1690 struct stream *s;
1691 enum lsp_types_t type;
1692 struct prefix prefix;
1693 enum nexthop_types_t gtype;
1694 union g_addr gate;
1695 ifindex_t ifindex;
1696 mpls_label_t in_label, out_label;
1697 uint8_t distance;
1698
1699 /* Get input stream. */
1700 s = msg;
1701
1702 /* Get data. */
1703 STREAM_GETC(s, type);
1704 STREAM_GETL(s, prefix.family);
1705 switch (prefix.family) {
1706 case AF_INET:
1707 STREAM_GET(&prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
1708 STREAM_GETC(s, prefix.prefixlen);
1709 if (prefix.prefixlen > IPV4_MAX_BITLEN) {
1710 zlog_debug(
1711 "%s: Specified prefix length %d is greater than a v4 address can support",
1712 __PRETTY_FUNCTION__, prefix.prefixlen);
1713 return;
1714 }
1715 STREAM_GET(&gate.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
1716 break;
1717 case AF_INET6:
1718 STREAM_GET(&prefix.u.prefix6, s, 16);
1719 STREAM_GETC(s, prefix.prefixlen);
1720 if (prefix.prefixlen > IPV6_MAX_BITLEN) {
1721 zlog_debug(
1722 "%s: Specified prefix length %d is greater than a v6 address can support",
1723 __PRETTY_FUNCTION__, prefix.prefixlen);
1724 return;
1725 }
1726 STREAM_GET(&gate.ipv6, s, 16);
1727 break;
1728 default:
1729 zlog_debug("%s: Specified AF %d is not supported for this call",
1730 __PRETTY_FUNCTION__, prefix.family);
1731 return;
1732 }
1733 STREAM_GETL(s, ifindex);
1734 STREAM_GETC(s, distance);
1735 STREAM_GETL(s, in_label);
1736 STREAM_GETL(s, out_label);
1737
1738 switch (prefix.family) {
1739 case AF_INET:
1740 if (ifindex)
1741 gtype = NEXTHOP_TYPE_IPV4_IFINDEX;
1742 else
1743 gtype = NEXTHOP_TYPE_IPV4;
1744 break;
1745 case AF_INET6:
1746 if (ifindex)
1747 gtype = NEXTHOP_TYPE_IPV6_IFINDEX;
1748 else
1749 gtype = NEXTHOP_TYPE_IPV6;
1750 break;
1751 default:
1752 return;
1753 }
1754
1755 if (!mpls_enabled)
1756 return;
1757
1758 if (hdr->command == ZEBRA_MPLS_LABELS_ADD) {
1759 mpls_lsp_install(zvrf, type, in_label, out_label, gtype, &gate,
1760 ifindex);
1761 mpls_ftn_update(1, zvrf, type, &prefix, gtype, &gate, ifindex,
1762 distance, out_label);
1763 } else if (hdr->command == ZEBRA_MPLS_LABELS_DELETE) {
1764 mpls_lsp_uninstall(zvrf, type, in_label, gtype, &gate, ifindex);
1765 mpls_ftn_update(0, zvrf, type, &prefix, gtype, &gate, ifindex,
1766 distance, out_label);
1767 }
1768 stream_failure:
1769 return;
1770 }
1771
1772 /* Send response to a table manager connect request to client */
1773 static void zread_table_manager_connect(struct zserv *client,
1774 struct stream *msg, vrf_id_t vrf_id)
1775 {
1776 struct stream *s;
1777 uint8_t proto;
1778 uint16_t instance;
1779
1780 s = msg;
1781
1782 /* Get data. */
1783 STREAM_GETC(s, proto);
1784 STREAM_GETW(s, instance);
1785
1786 /* accept only dynamic routing protocols */
1787 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1788 flog_err(ZEBRA_ERR_TM_WRONG_PROTO,
1789 "client %d has wrong protocol %s", client->sock,
1790 zebra_route_string(proto));
1791 zsend_table_manager_connect_response(client, vrf_id, 1);
1792 return;
1793 }
1794 zlog_notice("client %d with vrf %u instance %u connected as %s",
1795 client->sock, vrf_id, instance, zebra_route_string(proto));
1796 client->proto = proto;
1797 client->instance = instance;
1798
1799 /*
1800 * Release previous labels of same protocol and instance.
1801 * This is done in case it restarted from an unexpected shutdown.
1802 */
1803 release_daemon_table_chunks(client);
1804
1805 zsend_table_manager_connect_response(client, vrf_id, 0);
1806
1807 stream_failure:
1808 return;
1809 }
1810
1811 static void zread_label_manager_connect(struct zserv *client,
1812 struct stream *msg, vrf_id_t vrf_id)
1813 {
1814 struct stream *s;
1815 /* type of protocol (lib/zebra.h) */
1816 uint8_t proto;
1817 unsigned short instance;
1818
1819 /* Get input stream. */
1820 s = msg;
1821
1822 /* Get data. */
1823 STREAM_GETC(s, proto);
1824 STREAM_GETW(s, instance);
1825
1826 /* accept only dynamic routing protocols */
1827 if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) {
1828 flog_err(ZEBRA_ERR_TM_WRONG_PROTO,
1829 "client %d has wrong protocol %s", client->sock,
1830 zebra_route_string(proto));
1831 zsend_label_manager_connect_response(client, vrf_id, 1);
1832 return;
1833 }
1834 zlog_notice("client %d with vrf %u instance %u connected as %s",
1835 client->sock, vrf_id, instance, zebra_route_string(proto));
1836 client->proto = proto;
1837 client->instance = instance;
1838
1839 /*
1840 * Release previous labels of same protocol and instance.
1841 * This is done in case it restarted from an unexpected shutdown.
1842 */
1843 release_daemon_label_chunks(client);
1844
1845 zlog_debug(
1846 " Label Manager client connected: sock %d, proto %s, vrf %u instance %u",
1847 client->sock, zebra_route_string(proto), vrf_id, instance);
1848 /* send response back */
1849 zsend_label_manager_connect_response(client, vrf_id, 0);
1850
1851 stream_failure:
1852 return;
1853 }
1854 static int msg_client_id_mismatch(const char *op, struct zserv *client,
1855 uint8_t proto, unsigned int instance)
1856 {
1857 if (proto != client->proto) {
1858 flog_err(ZEBRA_ERR_PROTO_OR_INSTANCE_MISMATCH,
1859 "%s: msg vs client proto mismatch, client=%u msg=%u",
1860 op, client->proto, proto);
1861 /* TODO: fail when BGP sets proto and instance */
1862 /* return 1; */
1863 }
1864
1865 if (instance != client->instance) {
1866 flog_err(
1867 ZEBRA_ERR_PROTO_OR_INSTANCE_MISMATCH,
1868 "%s: msg vs client instance mismatch, client=%u msg=%u",
1869 op, client->instance, instance);
1870 /* TODO: fail when BGP sets proto and instance */
1871 /* return 1; */
1872 }
1873
1874 return 0;
1875 }
1876
1877 static void zread_get_label_chunk(struct zserv *client, struct stream *msg,
1878 vrf_id_t vrf_id)
1879 {
1880 struct stream *s;
1881 uint8_t keep;
1882 uint32_t size;
1883 struct label_manager_chunk *lmc;
1884 uint8_t proto;
1885 unsigned short instance;
1886
1887 /* Get input stream. */
1888 s = msg;
1889
1890 /* Get data. */
1891 STREAM_GETC(s, proto);
1892 STREAM_GETW(s, instance);
1893 STREAM_GETC(s, keep);
1894 STREAM_GETL(s, size);
1895
1896 /* detect client vs message (proto,instance) mismatch */
1897 if (msg_client_id_mismatch("Get-label-chunk", client, proto, instance))
1898 return;
1899
1900 lmc = assign_label_chunk(client->proto, client->instance, keep, size);
1901 if (!lmc)
1902 flog_err(
1903 ZEBRA_ERR_LM_CANNOT_ASSIGN_CHUNK,
1904 "Unable to assign Label Chunk of size %u to %s instance %u",
1905 size, zebra_route_string(client->proto),
1906 client->instance);
1907 else
1908 zlog_debug("Assigned Label Chunk %u - %u to %s instance %u",
1909 lmc->start, lmc->end,
1910 zebra_route_string(client->proto), client->instance);
1911 /* send response back */
1912 zsend_assign_label_chunk_response(client, vrf_id, lmc);
1913
1914 stream_failure:
1915 return;
1916 }
1917
1918 static void zread_release_label_chunk(struct zserv *client, struct stream *msg)
1919 {
1920 struct stream *s;
1921 uint32_t start, end;
1922 uint8_t proto;
1923 unsigned short instance;
1924
1925 /* Get input stream. */
1926 s = msg;
1927
1928 /* Get data. */
1929 STREAM_GETC(s, proto);
1930 STREAM_GETW(s, instance);
1931 STREAM_GETL(s, start);
1932 STREAM_GETL(s, end);
1933
1934 /* detect client vs message (proto,instance) mismatch */
1935 if (msg_client_id_mismatch("Release-label-chunk", client, proto,
1936 instance))
1937 return;
1938
1939 release_label_chunk(client->proto, client->instance, start, end);
1940
1941 stream_failure:
1942 return;
1943 }
1944 static void zread_label_manager_request(ZAPI_HANDLER_ARGS)
1945 {
1946 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
1947 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT)
1948 client->is_synchronous = 1;
1949
1950 /* external label manager */
1951 if (lm_is_external)
1952 zread_relay_label_manager_request(hdr->command, client, msg,
1953 zvrf_id(zvrf));
1954 /* this is a label manager */
1955 else {
1956 if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT)
1957 zread_label_manager_connect(client, msg, zvrf_id(zvrf));
1958 else {
1959 /* Sanity: don't allow 'unidentified' requests */
1960 if (!client->proto) {
1961 flog_err(
1962 ZEBRA_ERR_LM_ALIENS,
1963 "Got label request from an unidentified client");
1964 return;
1965 }
1966 if (hdr->command == ZEBRA_GET_LABEL_CHUNK)
1967 zread_get_label_chunk(client, msg,
1968 zvrf_id(zvrf));
1969 else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK)
1970 zread_release_label_chunk(client, msg);
1971 }
1972 }
1973 }
1974
1975 static void zread_get_table_chunk(struct zserv *client, struct stream *msg,
1976 vrf_id_t vrf_id)
1977 {
1978 struct stream *s;
1979 uint32_t size;
1980 struct table_manager_chunk *tmc;
1981
1982 /* Get input stream. */
1983 s = msg;
1984
1985 /* Get data. */
1986 STREAM_GETL(s, size);
1987
1988 tmc = assign_table_chunk(client->proto, client->instance, size);
1989 if (!tmc)
1990 flog_err(ZEBRA_ERR_TM_CANNOT_ASSIGN_CHUNK,
1991 "%s: Unable to assign Table Chunk of size %u",
1992 __func__, size);
1993 else
1994 zlog_debug("Assigned Table Chunk %u - %u", tmc->start,
1995 tmc->end);
1996 /* send response back */
1997 zsend_assign_table_chunk_response(client, vrf_id, tmc);
1998
1999 stream_failure:
2000 return;
2001 }
2002
2003 static void zread_release_table_chunk(struct zserv *client, struct stream *msg)
2004 {
2005 struct stream *s;
2006 uint32_t start, end;
2007
2008 /* Get input stream. */
2009 s = msg;
2010
2011 /* Get data. */
2012 STREAM_GETL(s, start);
2013 STREAM_GETL(s, end);
2014
2015 release_table_chunk(client->proto, client->instance, start, end);
2016
2017 stream_failure:
2018 return;
2019 }
2020
2021 static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
2022 {
2023 /* to avoid sending other messages like ZERBA_INTERFACE_UP */
2024 if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT)
2025 zread_table_manager_connect(client, msg, zvrf_id(zvrf));
2026 else {
2027 /* Sanity: don't allow 'unidentified' requests */
2028 if (!client->proto) {
2029 flog_err(
2030 ZEBRA_ERR_TM_ALIENS,
2031 "Got table request from an unidentified client");
2032 return;
2033 }
2034 if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
2035 zread_get_table_chunk(client, msg, zvrf_id(zvrf));
2036 else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
2037 zread_release_table_chunk(client, msg);
2038 }
2039 }
2040
2041 static void zread_pseudowire(ZAPI_HANDLER_ARGS)
2042 {
2043 struct stream *s;
2044 char ifname[IF_NAMESIZE];
2045 ifindex_t ifindex;
2046 int type;
2047 int af;
2048 union g_addr nexthop;
2049 uint32_t local_label;
2050 uint32_t remote_label;
2051 uint8_t flags;
2052 union pw_protocol_fields data;
2053 uint8_t protocol;
2054 struct zebra_pw *pw;
2055
2056 /* Get input stream. */
2057 s = msg;
2058
2059 /* Get data. */
2060 STREAM_GET(ifname, s, IF_NAMESIZE);
2061 STREAM_GETL(s, ifindex);
2062 STREAM_GETL(s, type);
2063 STREAM_GETL(s, af);
2064 switch (af) {
2065 case AF_INET:
2066 STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN);
2067 break;
2068 case AF_INET6:
2069 STREAM_GET(&nexthop.ipv6, s, 16);
2070 break;
2071 default:
2072 return;
2073 }
2074 STREAM_GETL(s, local_label);
2075 STREAM_GETL(s, remote_label);
2076 STREAM_GETC(s, flags);
2077 STREAM_GET(&data, s, sizeof(data));
2078 protocol = client->proto;
2079
2080 pw = zebra_pw_find(zvrf, ifname);
2081 switch (hdr->command) {
2082 case ZEBRA_PW_ADD:
2083 if (pw) {
2084 flog_warn(ZEBRA_ERR_PSEUDOWIRE_EXISTS,
2085 "%s: pseudowire %s already exists [%s]",
2086 __func__, ifname,
2087 zserv_command_string(hdr->command));
2088 return;
2089 }
2090
2091 zebra_pw_add(zvrf, ifname, protocol, client);
2092 break;
2093 case ZEBRA_PW_DELETE:
2094 if (!pw) {
2095 flog_warn(ZEBRA_ERR_PSEUDOWIRE_NONEXISTENT,
2096 "%s: pseudowire %s not found [%s]", __func__,
2097 ifname, zserv_command_string(hdr->command));
2098 return;
2099 }
2100
2101 zebra_pw_del(zvrf, pw);
2102 break;
2103 case ZEBRA_PW_SET:
2104 case ZEBRA_PW_UNSET:
2105 if (!pw) {
2106 flog_warn(ZEBRA_ERR_PSEUDOWIRE_NONEXISTENT,
2107 "%s: pseudowire %s not found [%s]", __func__,
2108 ifname, zserv_command_string(hdr->command));
2109 return;
2110 }
2111
2112 switch (hdr->command) {
2113 case ZEBRA_PW_SET:
2114 pw->enabled = 1;
2115 break;
2116 case ZEBRA_PW_UNSET:
2117 pw->enabled = 0;
2118 break;
2119 }
2120
2121 zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label,
2122 remote_label, flags, &data);
2123 break;
2124 }
2125
2126 stream_failure:
2127 return;
2128 }
2129
2130 static void zread_interface_set_master(ZAPI_HANDLER_ARGS)
2131 {
2132 struct interface *master;
2133 struct interface *slave;
2134 struct stream *s = msg;
2135 int ifindex;
2136 vrf_id_t vrf_id;
2137
2138 STREAM_GETL(s, vrf_id);
2139 STREAM_GETL(s, ifindex);
2140 master = if_lookup_by_index(ifindex, vrf_id);
2141
2142 STREAM_GETL(s, vrf_id);
2143 STREAM_GETL(s, ifindex);
2144 slave = if_lookup_by_index(ifindex, vrf_id);
2145
2146 if (!master || !slave)
2147 return;
2148
2149 kernel_interface_set_master(master, slave);
2150
2151 stream_failure:
2152 return;
2153 }
2154
2155
2156 static void zread_vrf_label(ZAPI_HANDLER_ARGS)
2157 {
2158 struct interface *ifp;
2159 mpls_label_t nlabel;
2160 afi_t afi;
2161 struct stream *s;
2162 struct zebra_vrf *def_zvrf;
2163 enum lsp_types_t ltype;
2164
2165 s = msg;
2166 STREAM_GETL(s, nlabel);
2167 STREAM_GETC(s, afi);
2168 if (nlabel == zvrf->label[afi]) {
2169 /*
2170 * Nothing to do here move along
2171 */
2172 return;
2173 }
2174
2175 STREAM_GETC(s, ltype);
2176
2177 if (zvrf->vrf->vrf_id != VRF_DEFAULT)
2178 ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id);
2179 else
2180 ifp = if_lookup_by_name("lo", VRF_DEFAULT);
2181
2182 if (!ifp) {
2183 zlog_debug("Unable to find specified Interface for %s",
2184 zvrf->vrf->name);
2185 return;
2186 }
2187
2188 def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT);
2189
2190 if (zvrf->label[afi] != MPLS_LABEL_NONE) {
2191 afi_t scrubber;
2192 bool really_remove;
2193
2194 really_remove = true;
2195 for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) {
2196 if (scrubber == afi)
2197 continue;
2198
2199 if (zvrf->label[scrubber] == MPLS_LABEL_NONE)
2200 continue;
2201
2202 if (zvrf->label[afi] == zvrf->label[scrubber]) {
2203 really_remove = false;
2204 break;
2205 }
2206 }
2207
2208 if (really_remove)
2209 mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi],
2210 NEXTHOP_TYPE_IFINDEX, NULL,
2211 ifp->ifindex);
2212 }
2213
2214 if (nlabel != MPLS_LABEL_NONE)
2215 mpls_lsp_install(def_zvrf, ltype, nlabel,
2216 MPLS_LABEL_IMPLICIT_NULL, NEXTHOP_TYPE_IFINDEX,
2217 NULL, ifp->ifindex);
2218
2219 zvrf->label[afi] = nlabel;
2220 stream_failure:
2221 return;
2222 }
2223
2224 static inline void zread_rule(ZAPI_HANDLER_ARGS)
2225 {
2226 struct zebra_pbr_rule zpr;
2227 struct stream *s;
2228 uint32_t total, i;
2229 ifindex_t ifindex;
2230
2231 s = msg;
2232 STREAM_GETL(s, total);
2233
2234 for (i = 0; i < total; i++) {
2235 memset(&zpr, 0, sizeof(zpr));
2236
2237 zpr.sock = client->sock;
2238 zpr.rule.vrf_id = hdr->vrf_id;
2239 STREAM_GETL(s, zpr.rule.seq);
2240 STREAM_GETL(s, zpr.rule.priority);
2241 STREAM_GETL(s, zpr.rule.unique);
2242 STREAM_GETC(s, zpr.rule.filter.src_ip.family);
2243 STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
2244 STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
2245 prefix_blen(&zpr.rule.filter.src_ip));
2246 STREAM_GETW(s, zpr.rule.filter.src_port);
2247 STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
2248 STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
2249 STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
2250 prefix_blen(&zpr.rule.filter.dst_ip));
2251 STREAM_GETW(s, zpr.rule.filter.dst_port);
2252 STREAM_GETL(s, zpr.rule.filter.fwmark);
2253 STREAM_GETL(s, zpr.rule.action.table);
2254 STREAM_GETL(s, ifindex);
2255
2256 if (ifindex) {
2257 zpr.ifp = if_lookup_by_index_per_ns(
2258 zvrf->zns,
2259 ifindex);
2260 if (!zpr.ifp) {
2261 zlog_debug("Failed to lookup ifindex: %u",
2262 ifindex);
2263 return;
2264 }
2265 }
2266
2267 if (!is_default_prefix(&zpr.rule.filter.src_ip))
2268 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
2269
2270 if (!is_default_prefix(&zpr.rule.filter.dst_ip))
2271 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
2272
2273 if (zpr.rule.filter.src_port)
2274 zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
2275
2276 if (zpr.rule.filter.dst_port)
2277 zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
2278
2279 if (zpr.rule.filter.fwmark)
2280 zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
2281
2282 if (hdr->command == ZEBRA_RULE_ADD)
2283 zebra_pbr_add_rule(zvrf->zns, &zpr);
2284 else
2285 zebra_pbr_del_rule(zvrf->zns, &zpr);
2286 }
2287
2288 stream_failure:
2289 return;
2290 }
2291
2292 static inline void zread_ipset(ZAPI_HANDLER_ARGS)
2293 {
2294 struct zebra_pbr_ipset zpi;
2295 struct stream *s;
2296 uint32_t total, i;
2297
2298 s = msg;
2299 STREAM_GETL(s, total);
2300
2301 for (i = 0; i < total; i++) {
2302 memset(&zpi, 0, sizeof(zpi));
2303
2304 zpi.sock = client->sock;
2305 zpi.vrf_id = zvrf->vrf->vrf_id;
2306 STREAM_GETL(s, zpi.unique);
2307 STREAM_GETL(s, zpi.type);
2308 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2309
2310 if (hdr->command == ZEBRA_IPSET_CREATE)
2311 zebra_pbr_create_ipset(zvrf->zns, &zpi);
2312 else
2313 zebra_pbr_destroy_ipset(zvrf->zns, &zpi);
2314 }
2315
2316 stream_failure:
2317 return;
2318 }
2319
2320 static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS)
2321 {
2322 struct zebra_pbr_ipset_entry zpi;
2323 struct zebra_pbr_ipset ipset;
2324 struct stream *s;
2325 uint32_t total, i;
2326
2327 s = msg;
2328 STREAM_GETL(s, total);
2329
2330 for (i = 0; i < total; i++) {
2331 memset(&zpi, 0, sizeof(zpi));
2332 memset(&ipset, 0, sizeof(ipset));
2333
2334 zpi.sock = client->sock;
2335 STREAM_GETL(s, zpi.unique);
2336 STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2337 STREAM_GETC(s, zpi.src.family);
2338 STREAM_GETC(s, zpi.src.prefixlen);
2339 STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src));
2340 STREAM_GETC(s, zpi.dst.family);
2341 STREAM_GETC(s, zpi.dst.prefixlen);
2342 STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst));
2343
2344 STREAM_GETW(s, zpi.src_port_min);
2345 STREAM_GETW(s, zpi.src_port_max);
2346 STREAM_GETW(s, zpi.dst_port_min);
2347 STREAM_GETW(s, zpi.dst_port_max);
2348 STREAM_GETC(s, zpi.proto);
2349 if (!is_default_prefix(&zpi.src))
2350 zpi.filter_bm |= PBR_FILTER_SRC_IP;
2351
2352 if (!is_default_prefix(&zpi.dst))
2353 zpi.filter_bm |= PBR_FILTER_DST_IP;
2354 if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2355 zpi.filter_bm |= PBR_FILTER_DST_PORT;
2356 if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP)
2357 zpi.filter_bm |= PBR_FILTER_SRC_PORT;
2358 if (zpi.dst_port_max != 0)
2359 zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE;
2360 if (zpi.src_port_max != 0)
2361 zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE;
2362 if (zpi.proto != 0)
2363 zpi.filter_bm |= PBR_FILTER_PROTO;
2364
2365 /* calculate backpointer */
2366 zpi.backpointer = zebra_pbr_lookup_ipset_pername(
2367 zvrf->zns, ipset.ipset_name);
2368 if (hdr->command == ZEBRA_IPSET_ENTRY_ADD)
2369 zebra_pbr_add_ipset_entry(zvrf->zns, &zpi);
2370 else
2371 zebra_pbr_del_ipset_entry(zvrf->zns, &zpi);
2372 }
2373
2374 stream_failure:
2375 return;
2376 }
2377
2378 static inline void zread_iptable(ZAPI_HANDLER_ARGS)
2379 {
2380 struct zebra_pbr_iptable zpi;
2381 struct stream *s;
2382
2383 s = msg;
2384
2385 memset(&zpi, 0, sizeof(zpi));
2386
2387 zpi.interface_name_list = list_new();
2388 zpi.sock = client->sock;
2389 zpi.vrf_id = zvrf->vrf->vrf_id;
2390 STREAM_GETL(s, zpi.unique);
2391 STREAM_GETL(s, zpi.type);
2392 STREAM_GETL(s, zpi.filter_bm);
2393 STREAM_GETL(s, zpi.action);
2394 STREAM_GETL(s, zpi.fwmark);
2395 STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
2396 STREAM_GETW(s, zpi.pkt_len_min);
2397 STREAM_GETW(s, zpi.pkt_len_max);
2398 STREAM_GETW(s, zpi.tcp_flags);
2399 STREAM_GETW(s, zpi.tcp_mask_flags);
2400 STREAM_GETC(s, zpi.dscp_value);
2401 STREAM_GETC(s, zpi.fragment);
2402 STREAM_GETL(s, zpi.nb_interface);
2403 zebra_pbr_iptable_update_interfacelist(s, &zpi);
2404
2405 if (hdr->command == ZEBRA_IPTABLE_ADD)
2406 zebra_pbr_add_iptable(zvrf->zns, &zpi);
2407 else
2408 zebra_pbr_del_iptable(zvrf->zns, &zpi);
2409 stream_failure:
2410 return;
2411 }
2412
2413 void (*zserv_handlers[])(ZAPI_HANDLER_ARGS) = {
2414 [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add,
2415 [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete,
2416 [ZEBRA_INTERFACE_ADD] = zread_interface_add,
2417 [ZEBRA_INTERFACE_DELETE] = zread_interface_delete,
2418 [ZEBRA_ROUTE_ADD] = zread_route_add,
2419 [ZEBRA_ROUTE_DELETE] = zread_route_del,
2420 [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add,
2421 [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete,
2422 [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add,
2423 [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete,
2424 [ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
2425 [ZEBRA_HELLO] = zread_hello,
2426 [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
2427 [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
2428 [ZEBRA_IMPORT_ROUTE_REGISTER] = zread_rnh_register,
2429 [ZEBRA_IMPORT_ROUTE_UNREGISTER] = zread_rnh_unregister,
2430 [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register,
2431 [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register,
2432 [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister,
2433 #if HAVE_BFDD > 0
2434 [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay,
2435 #endif /* HAVE_BFDD */
2436 [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister,
2437 [ZEBRA_VRF_LABEL] = zread_vrf_label,
2438 [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register,
2439 #if defined(HAVE_RTADV)
2440 [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
2441 [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
2442 #else
2443 [ZEBRA_INTERFACE_ENABLE_RADV] = NULL,
2444 [ZEBRA_INTERFACE_DISABLE_RADV] = NULL,
2445 #endif
2446 [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels,
2447 [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels,
2448 [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats,
2449 [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request,
2450 [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request,
2451 [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request,
2452 [ZEBRA_FEC_REGISTER] = zread_fec_register,
2453 [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister,
2454 [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip,
2455 [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet,
2456 [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni,
2457 [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add,
2458 [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del,
2459 [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add,
2460 [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del,
2461 [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master,
2462 [ZEBRA_PW_ADD] = zread_pseudowire,
2463 [ZEBRA_PW_DELETE] = zread_pseudowire,
2464 [ZEBRA_PW_SET] = zread_pseudowire,
2465 [ZEBRA_PW_UNSET] = zread_pseudowire,
2466 [ZEBRA_RULE_ADD] = zread_rule,
2467 [ZEBRA_RULE_DELETE] = zread_rule,
2468 [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request,
2469 [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request,
2470 [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request,
2471 [ZEBRA_IPSET_CREATE] = zread_ipset,
2472 [ZEBRA_IPSET_DESTROY] = zread_ipset,
2473 [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry,
2474 [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry,
2475 [ZEBRA_IPTABLE_ADD] = zread_iptable,
2476 [ZEBRA_IPTABLE_DELETE] = zread_iptable,
2477 };
2478
2479 #if defined(HANDLE_ZAPI_FUZZING)
2480 extern struct zebra_privs_t zserv_privs;
2481
2482 static void zserv_write_incoming(struct stream *orig, uint16_t command)
2483 {
2484 char fname[MAXPATHLEN];
2485 struct stream *copy;
2486 int fd = -1;
2487
2488 copy = stream_dup(orig);
2489 stream_set_getp(copy, 0);
2490
2491 snprintf(fname, MAXPATHLEN, "%s/%u", DAEMON_VTY_DIR, command);
2492
2493 frr_elevate_privs(&zserv_privs) {
2494 fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
2495 }
2496 stream_flush(copy, fd);
2497 close(fd);
2498 stream_free(copy);
2499 }
2500 #endif
2501
2502 void zserv_handle_commands(struct zserv *client, struct stream *msg)
2503 {
2504 struct zmsghdr hdr;
2505 struct zebra_vrf *zvrf;
2506
2507 zapi_parse_header(msg, &hdr);
2508
2509 #if defined(HANDLE_ZAPI_FUZZING)
2510 zserv_write_incoming(msg, hdr.command);
2511 #endif
2512
2513 hdr.length -= ZEBRA_HEADER_SIZE;
2514
2515 /* lookup vrf */
2516 zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
2517 if (!zvrf) {
2518 if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
2519 zlog_debug("ZAPI message specifies unknown VRF: %d",
2520 hdr.vrf_id);
2521 return;
2522 }
2523
2524 if (hdr.command >= array_size(zserv_handlers)
2525 || zserv_handlers[hdr.command] == NULL)
2526 zlog_info("Zebra received unknown command %d", hdr.command);
2527 else
2528 zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
2529 }
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