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
;
41 static void zclient_lookup_sched(struct zclient
*zlookup
, int delay
);
43 /* Connect to zebra for nexthop lookup. */
44 static int zclient_lookup_connect(struct thread
*t
)
46 struct zclient
*zlookup
;
48 zlookup
= THREAD_ARG(t
);
50 if (zlookup
->sock
>= 0) {
54 if (zclient_socket_connect(zlookup
) < 0) {
56 zlog_warn("%s: failure connecting zclient socket: failures=%d",
57 __PRETTY_FUNCTION__
, zlookup
->fail
);
59 zlookup
->fail
= 0; /* reset counter on connection */
62 if (zlookup
->sock
< 0) {
63 /* Since last connect failed, retry within 10 secs */
64 zclient_lookup_sched(zlookup
, 10);
71 /* Schedule connection with delay. */
72 static void zclient_lookup_sched(struct zclient
*zlookup
, int delay
)
74 thread_add_timer(router
->master
, zclient_lookup_connect
, zlookup
, delay
,
77 zlog_notice("%s: zclient lookup connection scheduled for %d seconds",
78 __PRETTY_FUNCTION__
, delay
);
81 /* Schedule connection for now. */
82 static void zclient_lookup_sched_now(struct zclient
*zlookup
)
84 thread_add_event(router
->master
, zclient_lookup_connect
, zlookup
, 0,
87 zlog_notice("%s: zclient lookup immediate connection scheduled",
91 /* Schedule reconnection, if needed. */
92 static void zclient_lookup_reconnect(struct zclient
*zlookup
)
94 if (zlookup
->t_connect
) {
98 zclient_lookup_sched_now(zlookup
);
101 static void zclient_lookup_failed(struct zclient
*zlookup
)
103 if (zlookup
->sock
>= 0) {
104 if (close(zlookup
->sock
)) {
105 zlog_warn("%s: closing fd=%d: errno=%d %s", __func__
,
106 zlookup
->sock
, errno
, safe_strerror(errno
));
111 zclient_lookup_reconnect(zlookup
);
114 void zclient_lookup_free(void)
116 zclient_stop(zlookup
);
117 zclient_free(zlookup
);
121 void zclient_lookup_new(void)
123 zlookup
= zclient_new(router
->master
, &zclient_options_default
);
125 flog_err(EC_LIB_ZAPI_SOCKET
, "%s: zclient_new() failure",
126 __PRETTY_FUNCTION__
);
131 zlookup
->t_connect
= NULL
;
132 zlookup
->privs
= &pimd_privs
;
134 zclient_lookup_sched_now(zlookup
);
136 zlog_notice("%s: zclient lookup socket initialized",
137 __PRETTY_FUNCTION__
);
140 static int zclient_read_nexthop(struct pim_instance
*pim
,
141 struct zclient
*zlookup
,
142 struct pim_zlookup_nexthop nexthop_tab
[],
143 const int tab_size
, struct in_addr addr
)
151 uint16_t command
= 0;
152 struct in_addr raddr
;
158 if (PIM_DEBUG_PIM_NHT_DETAIL
) {
159 char addr_str
[INET_ADDRSTRLEN
];
160 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
161 zlog_debug("%s: addr=%s(%s)", __PRETTY_FUNCTION__
, addr_str
,
167 while (command
!= ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
) {
169 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
170 &version
, &vrf_id
, &command
);
172 flog_err(EC_LIB_ZAPI_MISSMATCH
,
173 "%s: zclient_read_header() failed",
174 __PRETTY_FUNCTION__
);
175 zclient_lookup_failed(zlookup
);
180 raddr
.s_addr
= stream_get_ipv4(s
);
182 if (raddr
.s_addr
!= addr
.s_addr
) {
183 char addr_str
[INET_ADDRSTRLEN
];
184 char raddr_str
[INET_ADDRSTRLEN
];
185 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
186 pim_inet4_dump("<raddr?>", raddr
, raddr_str
, sizeof(raddr_str
));
187 zlog_warn("%s: address mismatch: addr=%s(%s) raddr=%s",
188 __PRETTY_FUNCTION__
, addr_str
, pim
->vrf
->name
,
193 distance
= stream_getc(s
);
194 metric
= stream_getl(s
);
195 nexthop_num
= stream_getc(s
);
197 if (nexthop_num
< 1) {
198 if (PIM_DEBUG_PIM_NHT_DETAIL
)
199 zlog_debug("%s: socket %d bad nexthop_num=%d", __func__
,
200 zlookup
->sock
, nexthop_num
);
204 for (i
= 0; i
< nexthop_num
; ++i
) {
205 vrf_id_t nexthop_vrf_id
;
206 enum nexthop_types_t nexthop_type
;
207 struct pim_neighbor
*nbr
;
210 nexthop_vrf_id
= stream_getl(s
);
211 nexthop_type
= stream_getc(s
);
212 if (num_ifindex
>= tab_size
) {
213 char addr_str
[INET_ADDRSTRLEN
];
214 pim_inet4_dump("<addr?>", addr
, addr_str
,
217 "%s: found too many nexthop ifindexes (%d > %d) for address %s(%s)",
218 __PRETTY_FUNCTION__
, (num_ifindex
+ 1),
219 tab_size
, addr_str
, pim
->vrf
->name
);
222 nexthop_tab
[num_ifindex
].protocol_distance
= distance
;
223 nexthop_tab
[num_ifindex
].route_metric
= metric
;
224 nexthop_tab
[num_ifindex
].vrf_id
= nexthop_vrf_id
;
225 switch (nexthop_type
) {
226 case NEXTHOP_TYPE_IFINDEX
:
227 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
229 * Connected route (i.e. no nexthop), use
230 * address passed in as PIM nexthop. This will
231 * allow us to work in cases where we are
232 * trying to find a route for this box.
234 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET
;
235 nexthop_tab
[num_ifindex
].nexthop_addr
.prefixlen
=
237 nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix4
=
241 case NEXTHOP_TYPE_IPV4_IFINDEX
:
242 case NEXTHOP_TYPE_IPV4
:
243 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET
;
244 nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix4
.s_addr
=
246 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
249 case NEXTHOP_TYPE_IPV6_IFINDEX
:
250 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET6
;
251 stream_get(&nexthop_tab
[num_ifindex
]
252 .nexthop_addr
.u
.prefix6
,
253 s
, sizeof(struct in6_addr
));
254 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
257 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
259 &nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix6
,
260 sizeof(struct in6_addr
));
263 * If we are sending v6 secondary assume we receive v6
266 if (pim
->send_v6_secondary
)
267 nbr
= pim_neighbor_find_by_secondary(
269 nexthop_tab
[num_ifindex
]
274 nbr
= pim_neighbor_find_if(if_lookup_by_index(
275 nexthop_tab
[num_ifindex
].ifindex
,
278 nexthop_tab
[num_ifindex
].nexthop_addr
.family
=
280 nexthop_tab
[num_ifindex
]
281 .nexthop_addr
.u
.prefix4
=
289 char addr_str
[INET_ADDRSTRLEN
];
290 pim_inet4_dump("<addr?>", addr
, addr_str
,
293 "%s: found non-ifindex nexthop type=%d for address %s(%s)",
294 __PRETTY_FUNCTION__
, nexthop_type
,
295 addr_str
, pim
->vrf
->name
);
304 static int zclient_lookup_nexthop_once(struct pim_instance
*pim
,
305 struct pim_zlookup_nexthop nexthop_tab
[],
306 const int tab_size
, struct in_addr addr
)
311 if (PIM_DEBUG_PIM_NHT_DETAIL
) {
312 char addr_str
[INET_ADDRSTRLEN
];
313 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
314 zlog_debug("%s: addr=%s(%s)", __PRETTY_FUNCTION__
, addr_str
,
319 if (zlookup
->sock
< 0) {
320 flog_err(EC_LIB_ZAPI_SOCKET
,
321 "%s: zclient lookup socket is not connected",
322 __PRETTY_FUNCTION__
);
323 zclient_lookup_failed(zlookup
);
327 if (pim
->vrf
->vrf_id
== VRF_UNKNOWN
) {
329 "%s: VRF: %s does not fully exist yet, delaying lookup",
330 __PRETTY_FUNCTION__
, pim
->vrf
->name
);
336 zclient_create_header(s
, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
, pim
->vrf_id
);
337 stream_put_in_addr(s
, &addr
);
338 stream_putw_at(s
, 0, stream_get_endp(s
));
340 ret
= writen(zlookup
->sock
, s
->data
, stream_get_endp(s
));
344 "%s: writen() failure: %d writing to zclient lookup socket",
345 __PRETTY_FUNCTION__
, errno
);
346 zclient_lookup_failed(zlookup
);
350 flog_err_sys(EC_LIB_SOCKET
,
351 "%s: connection closed on zclient lookup socket",
352 __PRETTY_FUNCTION__
);
353 zclient_lookup_failed(zlookup
);
357 return zclient_read_nexthop(pim
, zlookup
, nexthop_tab
, tab_size
, addr
);
360 int zclient_lookup_nexthop(struct pim_instance
*pim
,
361 struct pim_zlookup_nexthop nexthop_tab
[],
362 const int tab_size
, struct in_addr addr
,
366 uint32_t route_metric
= 0xFFFFFFFF;
367 uint8_t protocol_distance
= 0xFF;
369 pim
->nexthop_lookups
++;
371 for (lookup
= 0; lookup
< max_lookup
; ++lookup
) {
374 struct prefix nexthop_addr
;
376 num_ifindex
= zclient_lookup_nexthop_once(pim
, nexthop_tab
,
378 if (num_ifindex
< 1) {
379 if (PIM_DEBUG_PIM_NHT
) {
380 char addr_str
[INET_ADDRSTRLEN
];
381 pim_inet4_dump("<addr?>", addr
, addr_str
,
384 "%s: lookup=%d/%d: could not find nexthop ifindex for address %s(%s)",
385 __PRETTY_FUNCTION__
, lookup
, max_lookup
,
386 addr_str
, pim
->vrf
->name
);
392 /* this is the non-recursive lookup - save original
394 route_metric
= nexthop_tab
[0].route_metric
;
395 protocol_distance
= nexthop_tab
[0].protocol_distance
;
399 * FIXME: Non-recursive nexthop ensured only for first ifindex.
400 * However, recursive route lookup should really be fixed in
404 * So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
405 * it was being stored. This Doesn't solve all cases of
406 * recursive lookup but for the most common types it does.
408 first_ifindex
= nexthop_tab
[0].ifindex
;
409 nexthop_addr
= nexthop_tab
[0].nexthop_addr
;
410 if (first_ifindex
> 0) {
411 /* found: first ifindex is non-recursive nexthop */
414 /* Report non-recursive success after first
416 if (PIM_DEBUG_PIM_NHT
) {
417 char addr_str
[INET_ADDRSTRLEN
];
418 pim_inet4_dump("<addr?>", addr
,
422 "%s: lookup=%d/%d: found non-recursive ifindex=%d for address %s(%s) dist=%d met=%d",
423 __PRETTY_FUNCTION__
, lookup
,
424 max_lookup
, first_ifindex
,
425 addr_str
, pim
->vrf
->name
,
428 nexthop_tab
[0].route_metric
);
431 /* use last address as nexthop address */
432 nexthop_tab
[0].nexthop_addr
.u
.prefix4
= addr
;
434 /* report original route metric/distance */
435 nexthop_tab
[0].route_metric
= route_metric
;
436 nexthop_tab
[0].protocol_distance
=
443 if (PIM_DEBUG_PIM_NHT
) {
444 char addr_str
[INET_ADDRSTRLEN
];
445 char nexthop_str
[PREFIX_STRLEN
];
446 pim_inet4_dump("<addr?>", addr
, addr_str
,
448 pim_addr_dump("<nexthop?>", &nexthop_addr
, nexthop_str
,
449 sizeof(nexthop_str
));
451 "%s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s(%s) dist=%d met=%d",
452 __PRETTY_FUNCTION__
, lookup
, max_lookup
,
453 nexthop_str
, addr_str
, pim
->vrf
->name
,
454 nexthop_tab
[0].protocol_distance
,
455 nexthop_tab
[0].route_metric
);
458 addr
= nexthop_addr
.u
.prefix4
; /* use nexthop addr for
461 } /* for (max_lookup) */
463 if (PIM_DEBUG_PIM_NHT
) {
464 char addr_str
[INET_ADDRSTRLEN
];
465 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
467 "%s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s(%s)",
468 __PRETTY_FUNCTION__
, lookup
, max_lookup
, addr_str
,
475 void pim_zlookup_show_ip_multicast(struct vty
*vty
)
477 vty_out(vty
, "Zclient lookup socket: ");
479 vty_out(vty
, "%d failures=%d\n", zlookup
->sock
, zlookup
->fail
);
481 vty_out(vty
, "<null zclient>\n");
485 int pim_zlookup_sg_statistics(struct channel_oil
*c_oil
)
487 struct stream
*s
= zlookup
->obuf
;
488 uint16_t command
= 0;
489 unsigned long long lastused
;
493 struct interface
*ifp
=
494 pim_if_find_by_vif_index(c_oil
->pim
, c_oil
->oil
.mfcc_parent
);
496 if (PIM_DEBUG_ZEBRA
) {
497 struct prefix_sg more
;
499 more
.src
= c_oil
->oil
.mfcc_origin
;
500 more
.grp
= c_oil
->oil
.mfcc_mcastgrp
;
502 "Sending Request for New Channel Oil Information(%s) VIIF %d(%s)",
503 pim_str_sg_dump(&more
), c_oil
->oil
.mfcc_parent
,
504 c_oil
->pim
->vrf
->name
);
511 zclient_create_header(s
, ZEBRA_IPMR_ROUTE_STATS
, c_oil
->pim
->vrf_id
);
512 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_origin
);
513 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_mcastgrp
);
514 stream_putl(s
, ifp
->ifindex
);
515 stream_putw_at(s
, 0, stream_get_endp(s
));
517 count
= stream_get_endp(s
);
518 ret
= writen(zlookup
->sock
, s
->data
, count
);
522 "%s: writen() failure: %d writing to zclient lookup socket",
523 __PRETTY_FUNCTION__
, errno
);
529 while (command
!= ZEBRA_IPMR_ROUTE_STATS
) {
537 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
538 &version
, &vrf_id
, &command
);
540 flog_err(EC_LIB_ZAPI_MISSMATCH
,
541 "%s: zclient_read_header() failed",
542 __PRETTY_FUNCTION__
);
543 zclient_lookup_failed(zlookup
);
548 sg
.src
.s_addr
= stream_get_ipv4(s
);
549 sg
.grp
.s_addr
= stream_get_ipv4(s
);
550 if (sg
.src
.s_addr
!= c_oil
->oil
.mfcc_origin
.s_addr
551 || sg
.grp
.s_addr
!= c_oil
->oil
.mfcc_mcastgrp
.s_addr
) {
552 if (PIM_DEBUG_ZEBRA
) {
553 struct prefix_sg more
;
555 more
.src
= c_oil
->oil
.mfcc_origin
;
556 more
.grp
= c_oil
->oil
.mfcc_mcastgrp
;
558 EC_LIB_ZAPI_MISSMATCH
,
559 "%s: Received wrong %s(%s) information requested",
560 __PRETTY_FUNCTION__
, pim_str_sg_dump(&more
),
561 c_oil
->pim
->vrf
->name
);
563 zclient_lookup_failed(zlookup
);
567 stream_get(&lastused
, s
, sizeof(lastused
));
570 c_oil
->cc
.lastused
= lastused
;