3 * Copyright (C) 2008 Everton da Silva Marques
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; see the file COPYING; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "lib_errors.h"
33 #include "pim_iface.h"
37 #include "pim_zlookup.h"
39 static struct zclient
*zlookup
= NULL
;
40 struct thread
*zlookup_read
;
42 static void zclient_lookup_sched(struct zclient
*zlookup
, int delay
);
43 static int zclient_lookup_read_pipe(struct thread
*thread
);
45 /* Connect to zebra for nexthop lookup. */
46 static int zclient_lookup_connect(struct thread
*t
)
48 struct zclient
*zlookup
;
50 zlookup
= THREAD_ARG(t
);
52 if (zlookup
->sock
>= 0) {
56 if (zclient_socket_connect(zlookup
) < 0) {
58 zlog_warn("%s: failure connecting zclient socket: failures=%d",
59 __PRETTY_FUNCTION__
, zlookup
->fail
);
61 zlookup
->fail
= 0; /* reset counter on connection */
64 if (zlookup
->sock
< 0) {
65 /* Since last connect failed, retry within 10 secs */
66 zclient_lookup_sched(zlookup
, 10);
70 thread_add_timer(router
->master
, zclient_lookup_read_pipe
, zlookup
, 60,
75 /* Schedule connection with delay. */
76 static void zclient_lookup_sched(struct zclient
*zlookup
, int delay
)
78 thread_add_timer(router
->master
, zclient_lookup_connect
, zlookup
, delay
,
81 zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
82 __PRETTY_FUNCTION__
, delay
);
85 /* Schedule connection for now. */
86 static void zclient_lookup_sched_now(struct zclient
*zlookup
)
88 thread_add_event(router
->master
, zclient_lookup_connect
, zlookup
, 0,
91 zlog_notice("%s: zclient lookup immediate connection scheduled",
95 /* Schedule reconnection, if needed. */
96 static void zclient_lookup_reconnect(struct zclient
*zlookup
)
98 if (zlookup
->t_connect
) {
102 zclient_lookup_sched_now(zlookup
);
105 static void zclient_lookup_failed(struct zclient
*zlookup
)
107 if (zlookup
->sock
>= 0) {
108 if (close(zlookup
->sock
)) {
109 zlog_warn("%s: closing fd=%d: errno=%d %s", __func__
,
110 zlookup
->sock
, errno
, safe_strerror(errno
));
115 zclient_lookup_reconnect(zlookup
);
118 void zclient_lookup_free(void)
120 thread_cancel(zlookup_read
);
121 zclient_stop(zlookup
);
122 zclient_free(zlookup
);
126 void zclient_lookup_new(void)
128 zlookup
= zclient_new(router
->master
, &zclient_options_default
);
130 flog_err(EC_LIB_ZAPI_SOCKET
, "%s: zclient_new() failure",
131 __PRETTY_FUNCTION__
);
136 zlookup
->t_connect
= NULL
;
137 zlookup
->privs
= &pimd_privs
;
139 zclient_lookup_sched_now(zlookup
);
141 zlog_notice("%s: zclient lookup socket initialized",
142 __PRETTY_FUNCTION__
);
145 static int zclient_read_nexthop(struct pim_instance
*pim
,
146 struct zclient
*zlookup
,
147 struct pim_zlookup_nexthop nexthop_tab
[],
148 const int tab_size
, struct in_addr addr
)
156 uint16_t command
= 0;
157 struct in_addr raddr
;
163 if (PIM_DEBUG_PIM_NHT_DETAIL
) {
164 char addr_str
[INET_ADDRSTRLEN
];
165 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
166 zlog_debug("%s: addr=%s(%s)", __PRETTY_FUNCTION__
, addr_str
,
172 while (command
!= ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
) {
174 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
175 &version
, &vrf_id
, &command
);
177 flog_err(EC_LIB_ZAPI_MISSMATCH
,
178 "%s: zclient_read_header() failed",
179 __PRETTY_FUNCTION__
);
180 zclient_lookup_failed(zlookup
);
185 raddr
.s_addr
= stream_get_ipv4(s
);
187 if (raddr
.s_addr
!= addr
.s_addr
) {
188 char addr_str
[INET_ADDRSTRLEN
];
189 char raddr_str
[INET_ADDRSTRLEN
];
190 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
191 pim_inet4_dump("<raddr?>", raddr
, raddr_str
, sizeof(raddr_str
));
192 zlog_warn("%s: address mismatch: addr=%s(%s) raddr=%s",
193 __PRETTY_FUNCTION__
, addr_str
, pim
->vrf
->name
,
198 distance
= stream_getc(s
);
199 metric
= stream_getl(s
);
200 nexthop_num
= stream_getc(s
);
202 if (nexthop_num
< 1) {
203 if (PIM_DEBUG_PIM_NHT_DETAIL
)
204 zlog_debug("%s: socket %d bad nexthop_num=%d", __func__
,
205 zlookup
->sock
, nexthop_num
);
209 for (i
= 0; i
< nexthop_num
; ++i
) {
210 vrf_id_t nexthop_vrf_id
;
211 enum nexthop_types_t nexthop_type
;
212 struct pim_neighbor
*nbr
;
215 nexthop_vrf_id
= stream_getl(s
);
216 nexthop_type
= stream_getc(s
);
217 if (num_ifindex
>= tab_size
) {
218 char addr_str
[INET_ADDRSTRLEN
];
219 pim_inet4_dump("<addr?>", addr
, addr_str
,
222 "%s: found too many nexthop ifindexes (%d > %d) for address %s(%s)",
223 __PRETTY_FUNCTION__
, (num_ifindex
+ 1),
224 tab_size
, addr_str
, pim
->vrf
->name
);
227 nexthop_tab
[num_ifindex
].protocol_distance
= distance
;
228 nexthop_tab
[num_ifindex
].route_metric
= metric
;
229 nexthop_tab
[num_ifindex
].vrf_id
= nexthop_vrf_id
;
230 switch (nexthop_type
) {
231 case NEXTHOP_TYPE_IFINDEX
:
232 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
234 * Connected route (i.e. no nexthop), use
235 * address passed in as PIM nexthop. This will
236 * allow us to work in cases where we are
237 * trying to find a route for this box.
239 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET
;
240 nexthop_tab
[num_ifindex
].nexthop_addr
.prefixlen
=
242 nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix4
=
246 case NEXTHOP_TYPE_IPV4_IFINDEX
:
247 case NEXTHOP_TYPE_IPV4
:
248 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET
;
249 nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix4
.s_addr
=
251 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
254 case NEXTHOP_TYPE_IPV6_IFINDEX
:
255 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET6
;
256 stream_get(&nexthop_tab
[num_ifindex
]
257 .nexthop_addr
.u
.prefix6
,
258 s
, sizeof(struct in6_addr
));
259 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
262 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
264 &nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix6
,
265 sizeof(struct in6_addr
));
268 * If we are sending v6 secondary assume we receive v6
271 if (pim
->send_v6_secondary
)
272 nbr
= pim_neighbor_find_by_secondary(
274 nexthop_tab
[num_ifindex
]
279 nbr
= pim_neighbor_find_if(if_lookup_by_index(
280 nexthop_tab
[num_ifindex
].ifindex
,
283 nexthop_tab
[num_ifindex
].nexthop_addr
.family
=
285 nexthop_tab
[num_ifindex
]
286 .nexthop_addr
.u
.prefix4
=
294 char addr_str
[INET_ADDRSTRLEN
];
295 pim_inet4_dump("<addr?>", addr
, addr_str
,
298 "%s: found non-ifindex nexthop type=%d for address %s(%s)",
299 __PRETTY_FUNCTION__
, nexthop_type
,
300 addr_str
, pim
->vrf
->name
);
309 static int zclient_lookup_nexthop_once(struct pim_instance
*pim
,
310 struct pim_zlookup_nexthop nexthop_tab
[],
311 const int tab_size
, struct in_addr addr
)
316 if (PIM_DEBUG_PIM_NHT_DETAIL
) {
317 char addr_str
[INET_ADDRSTRLEN
];
318 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
319 zlog_debug("%s: addr=%s(%s)", __PRETTY_FUNCTION__
, addr_str
,
324 if (zlookup
->sock
< 0) {
325 flog_err(EC_LIB_ZAPI_SOCKET
,
326 "%s: zclient lookup socket is not connected",
327 __PRETTY_FUNCTION__
);
328 zclient_lookup_failed(zlookup
);
332 if (pim
->vrf
->vrf_id
== VRF_UNKNOWN
) {
334 "%s: VRF: %s does not fully exist yet, delaying lookup",
335 __PRETTY_FUNCTION__
, pim
->vrf
->name
);
341 zclient_create_header(s
, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
, pim
->vrf_id
);
342 stream_put_in_addr(s
, &addr
);
343 stream_putw_at(s
, 0, stream_get_endp(s
));
345 ret
= writen(zlookup
->sock
, s
->data
, stream_get_endp(s
));
349 "%s: writen() failure: %d writing to zclient lookup socket",
350 __PRETTY_FUNCTION__
, errno
);
351 zclient_lookup_failed(zlookup
);
355 flog_err_sys(EC_LIB_SOCKET
,
356 "%s: connection closed on zclient lookup socket",
357 __PRETTY_FUNCTION__
);
358 zclient_lookup_failed(zlookup
);
362 return zclient_read_nexthop(pim
, zlookup
, nexthop_tab
, tab_size
, addr
);
365 int zclient_lookup_read_pipe(struct thread
*thread
)
367 struct zclient
*zlookup
= THREAD_ARG(thread
);
368 struct pim_instance
*pim
= pim_get_pim_instance(VRF_DEFAULT
);
369 struct pim_zlookup_nexthop nexthop_tab
[10];
370 struct in_addr l
= {.s_addr
= INADDR_ANY
};
372 zclient_lookup_nexthop_once(pim
, nexthop_tab
, 10, l
);
373 thread_add_timer(router
->master
, zclient_lookup_read_pipe
, zlookup
, 60,
379 int zclient_lookup_nexthop(struct pim_instance
*pim
,
380 struct pim_zlookup_nexthop nexthop_tab
[],
381 const int tab_size
, struct in_addr addr
,
385 uint32_t route_metric
= 0xFFFFFFFF;
386 uint8_t protocol_distance
= 0xFF;
388 pim
->nexthop_lookups
++;
390 for (lookup
= 0; lookup
< max_lookup
; ++lookup
) {
393 struct prefix nexthop_addr
;
395 num_ifindex
= zclient_lookup_nexthop_once(pim
, nexthop_tab
,
397 if (num_ifindex
< 1) {
398 if (PIM_DEBUG_PIM_NHT
) {
399 char addr_str
[INET_ADDRSTRLEN
];
400 pim_inet4_dump("<addr?>", addr
, addr_str
,
403 "%s: lookup=%d/%d: could not find nexthop ifindex for address %s(%s)",
404 __PRETTY_FUNCTION__
, lookup
, max_lookup
,
405 addr_str
, pim
->vrf
->name
);
411 /* this is the non-recursive lookup - save original
413 route_metric
= nexthop_tab
[0].route_metric
;
414 protocol_distance
= nexthop_tab
[0].protocol_distance
;
418 * FIXME: Non-recursive nexthop ensured only for first ifindex.
419 * However, recursive route lookup should really be fixed in
423 * So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
424 * it was being stored. This Doesn't solve all cases of
425 * recursive lookup but for the most common types it does.
427 first_ifindex
= nexthop_tab
[0].ifindex
;
428 nexthop_addr
= nexthop_tab
[0].nexthop_addr
;
429 if (first_ifindex
> 0) {
430 /* found: first ifindex is non-recursive nexthop */
433 /* Report non-recursive success after first
435 if (PIM_DEBUG_PIM_NHT
) {
436 char addr_str
[INET_ADDRSTRLEN
];
437 pim_inet4_dump("<addr?>", addr
,
441 "%s: lookup=%d/%d: found non-recursive ifindex=%d for address %s(%s) dist=%d met=%d",
442 __PRETTY_FUNCTION__
, lookup
,
443 max_lookup
, first_ifindex
,
444 addr_str
, pim
->vrf
->name
,
447 nexthop_tab
[0].route_metric
);
450 /* use last address as nexthop address */
451 nexthop_tab
[0].nexthop_addr
.u
.prefix4
= addr
;
453 /* report original route metric/distance */
454 nexthop_tab
[0].route_metric
= route_metric
;
455 nexthop_tab
[0].protocol_distance
=
462 if (PIM_DEBUG_PIM_NHT
) {
463 char addr_str
[INET_ADDRSTRLEN
];
464 char nexthop_str
[PREFIX_STRLEN
];
465 pim_inet4_dump("<addr?>", addr
, addr_str
,
467 pim_addr_dump("<nexthop?>", &nexthop_addr
, nexthop_str
,
468 sizeof(nexthop_str
));
470 "%s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s(%s) dist=%d met=%d",
471 __PRETTY_FUNCTION__
, lookup
, max_lookup
,
472 nexthop_str
, addr_str
, pim
->vrf
->name
,
473 nexthop_tab
[0].protocol_distance
,
474 nexthop_tab
[0].route_metric
);
477 addr
= nexthop_addr
.u
.prefix4
; /* use nexthop addr for
480 } /* for (max_lookup) */
482 if (PIM_DEBUG_PIM_NHT
) {
483 char addr_str
[INET_ADDRSTRLEN
];
484 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
486 "%s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s(%s)",
487 __PRETTY_FUNCTION__
, lookup
, max_lookup
, addr_str
,
494 void pim_zlookup_show_ip_multicast(struct vty
*vty
)
496 vty_out(vty
, "Zclient lookup socket: ");
498 vty_out(vty
, "%d failures=%d\n", zlookup
->sock
, zlookup
->fail
);
500 vty_out(vty
, "<null zclient>\n");
504 int pim_zlookup_sg_statistics(struct channel_oil
*c_oil
)
506 struct stream
*s
= zlookup
->obuf
;
507 uint16_t command
= 0;
508 unsigned long long lastused
;
512 struct interface
*ifp
=
513 pim_if_find_by_vif_index(c_oil
->pim
, c_oil
->oil
.mfcc_parent
);
515 if (PIM_DEBUG_ZEBRA
) {
516 struct prefix_sg more
;
518 more
.src
= c_oil
->oil
.mfcc_origin
;
519 more
.grp
= c_oil
->oil
.mfcc_mcastgrp
;
521 "Sending Request for New Channel Oil Information%s VIIF %d(%s)",
522 pim_str_sg_dump(&more
), c_oil
->oil
.mfcc_parent
,
523 c_oil
->pim
->vrf
->name
);
530 zclient_create_header(s
, ZEBRA_IPMR_ROUTE_STATS
, c_oil
->pim
->vrf_id
);
531 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_origin
);
532 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_mcastgrp
);
533 stream_putl(s
, ifp
->ifindex
);
534 stream_putw_at(s
, 0, stream_get_endp(s
));
536 count
= stream_get_endp(s
);
537 ret
= writen(zlookup
->sock
, s
->data
, count
);
541 "%s: writen() failure: %d writing to zclient lookup socket",
542 __PRETTY_FUNCTION__
, errno
);
548 while (command
!= ZEBRA_IPMR_ROUTE_STATS
) {
556 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
557 &version
, &vrf_id
, &command
);
559 flog_err(EC_LIB_ZAPI_MISSMATCH
,
560 "%s: zclient_read_header() failed",
561 __PRETTY_FUNCTION__
);
562 zclient_lookup_failed(zlookup
);
567 sg
.src
.s_addr
= stream_get_ipv4(s
);
568 sg
.grp
.s_addr
= stream_get_ipv4(s
);
569 if (sg
.src
.s_addr
!= c_oil
->oil
.mfcc_origin
.s_addr
570 || sg
.grp
.s_addr
!= c_oil
->oil
.mfcc_mcastgrp
.s_addr
) {
571 if (PIM_DEBUG_ZEBRA
) {
572 struct prefix_sg more
;
574 more
.src
= c_oil
->oil
.mfcc_origin
;
575 more
.grp
= c_oil
->oil
.mfcc_mcastgrp
;
577 EC_LIB_ZAPI_MISSMATCH
,
578 "%s: Received wrong %s(%s) information requested",
579 __PRETTY_FUNCTION__
, pim_str_sg_dump(&more
),
580 c_oil
->pim
->vrf
->name
);
582 zclient_lookup_failed(zlookup
);
586 stream_get(&lastused
, s
, sizeof(lastused
));
589 c_oil
->cc
.lastused
= lastused
;