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
21 #include "zebra/rib.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(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(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(master
);
125 zlog_err("%s: zclient_new() failure", __PRETTY_FUNCTION__
);
130 zlookup
->t_connect
= NULL
;
132 zclient_lookup_sched_now(zlookup
);
134 zlog_notice("%s: zclient lookup socket initialized",
135 __PRETTY_FUNCTION__
);
138 static int zclient_read_nexthop(struct zclient
*zlookup
,
139 struct pim_zlookup_nexthop nexthop_tab
[],
140 const int tab_size
, struct in_addr addr
)
144 const uint16_t MIN_LEN
= 10; /* getipv4=4 getc=1 getl=4 getc=1 */
149 uint16_t command
= 0;
150 struct in_addr raddr
;
156 if (PIM_DEBUG_PIM_TRACE_DETAIL
) {
157 char addr_str
[INET_ADDRSTRLEN
];
158 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
159 zlog_debug("%s: addr=%s", __PRETTY_FUNCTION__
, addr_str
);
164 while (command
!= ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
) {
166 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
167 &version
, &vrf_id
, &command
);
169 zlog_err("%s %s: zclient_read_header() failed",
170 __FILE__
, __PRETTY_FUNCTION__
);
171 zclient_lookup_failed(zlookup
);
175 if (length
< MIN_LEN
) {
177 "%s %s: failure reading zclient lookup socket: len=%d < MIN_LEN=%d",
178 __FILE__
, __PRETTY_FUNCTION__
, length
, MIN_LEN
);
179 zclient_lookup_failed(zlookup
);
184 raddr
.s_addr
= stream_get_ipv4(s
);
186 if (raddr
.s_addr
!= addr
.s_addr
) {
187 char addr_str
[INET_ADDRSTRLEN
];
188 char raddr_str
[INET_ADDRSTRLEN
];
189 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
190 pim_inet4_dump("<raddr?>", raddr
, raddr_str
, sizeof(raddr_str
));
191 zlog_warn("%s: address mismatch: addr=%s raddr=%s",
192 __PRETTY_FUNCTION__
, addr_str
, raddr_str
);
196 distance
= stream_getc(s
);
197 metric
= stream_getl(s
);
198 nexthop_num
= stream_getc(s
);
200 if (nexthop_num
< 1) {
201 zlog_err("%s: socket %d bad nexthop_num=%d", __func__
,
202 zlookup
->sock
, nexthop_num
);
206 for (i
= 0; i
< nexthop_num
; ++i
) {
207 enum nexthop_types_t nexthop_type
;
208 struct pim_neighbor
*nbr
;
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 %s: found too many nexthop ifindexes (%d > %d) for address %s",
218 __FILE__
, __PRETTY_FUNCTION__
,
219 (num_ifindex
+ 1), tab_size
, addr_str
);
222 switch (nexthop_type
) {
223 case NEXTHOP_TYPE_IFINDEX
:
224 case NEXTHOP_TYPE_IPV4_IFINDEX
:
225 case NEXTHOP_TYPE_IPV4
:
226 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET
;
227 if (nexthop_type
== NEXTHOP_TYPE_IPV4_IFINDEX
228 || nexthop_type
== NEXTHOP_TYPE_IPV4
) {
229 nexthop_tab
[num_ifindex
]
230 .nexthop_addr
.u
.prefix4
.s_addr
=
233 nexthop_tab
[num_ifindex
]
234 .nexthop_addr
.u
.prefix4
.s_addr
=
237 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
238 nexthop_tab
[num_ifindex
].protocol_distance
= distance
;
239 nexthop_tab
[num_ifindex
].route_metric
= metric
;
242 case NEXTHOP_TYPE_IPV6_IFINDEX
:
243 nexthop_tab
[num_ifindex
].nexthop_addr
.family
= AF_INET6
;
244 stream_get(&nexthop_tab
[num_ifindex
]
245 .nexthop_addr
.u
.prefix6
,
246 s
, sizeof(struct in6_addr
));
247 nexthop_tab
[num_ifindex
].ifindex
= stream_getl(s
);
250 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
252 &nexthop_tab
[num_ifindex
].nexthop_addr
.u
.prefix6
,
253 sizeof(struct in6_addr
));
256 * If we are sending v6 secondary assume we receive v6
259 if (pimg
->send_v6_secondary
)
260 nbr
= pim_neighbor_find_by_secondary(
262 nexthop_tab
[num_ifindex
]
267 nbr
= pim_neighbor_find_if(if_lookup_by_index(
268 nexthop_tab
[num_ifindex
].ifindex
,
271 nexthop_tab
[num_ifindex
].nexthop_addr
.family
=
273 nexthop_tab
[num_ifindex
]
274 .nexthop_addr
.u
.prefix4
=
282 char addr_str
[INET_ADDRSTRLEN
];
283 pim_inet4_dump("<addr?>", addr
, addr_str
,
286 "%s %s: found non-ifindex nexthop type=%d for address %s",
287 __FILE__
, __PRETTY_FUNCTION__
,
288 nexthop_type
, addr_str
);
297 static int zclient_lookup_nexthop_once(struct pim_zlookup_nexthop nexthop_tab
[],
298 const int tab_size
, struct in_addr addr
)
303 if (PIM_DEBUG_PIM_TRACE_DETAIL
) {
304 char addr_str
[INET_ADDRSTRLEN
];
305 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
306 zlog_debug("%s: addr=%s", __PRETTY_FUNCTION__
, addr_str
);
310 if (zlookup
->sock
< 0) {
311 zlog_err("%s %s: zclient lookup socket is not connected",
312 __FILE__
, __PRETTY_FUNCTION__
);
313 zclient_lookup_failed(zlookup
);
319 zclient_create_header(s
, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB
, VRF_DEFAULT
);
320 stream_put_in_addr(s
, &addr
);
321 stream_putw_at(s
, 0, stream_get_endp(s
));
323 ret
= writen(zlookup
->sock
, s
->data
, stream_get_endp(s
));
326 "%s %s: writen() failure: %d writing to zclient lookup socket",
327 __FILE__
, __PRETTY_FUNCTION__
, errno
);
328 zclient_lookup_failed(zlookup
);
332 zlog_err("%s %s: connection closed on zclient lookup socket",
333 __FILE__
, __PRETTY_FUNCTION__
);
334 zclient_lookup_failed(zlookup
);
338 return zclient_read_nexthop(zlookup
, nexthop_tab
, tab_size
, addr
);
341 int zclient_lookup_nexthop(struct pim_zlookup_nexthop nexthop_tab
[],
342 const int tab_size
, struct in_addr addr
,
346 uint32_t route_metric
= 0xFFFFFFFF;
347 uint8_t protocol_distance
= 0xFF;
349 qpim_nexthop_lookups
++;
351 for (lookup
= 0; lookup
< max_lookup
; ++lookup
) {
354 struct prefix nexthop_addr
;
356 num_ifindex
= zclient_lookup_nexthop_once(nexthop_tab
, tab_size
,
358 if (num_ifindex
< 1) {
359 if (PIM_DEBUG_ZEBRA
) {
360 char addr_str
[INET_ADDRSTRLEN
];
361 pim_inet4_dump("<addr?>", addr
, addr_str
,
364 "%s %s: lookup=%d/%d: could not find nexthop ifindex for address %s",
365 __FILE__
, __PRETTY_FUNCTION__
, lookup
,
366 max_lookup
, addr_str
);
372 /* this is the non-recursive lookup - save original
374 route_metric
= nexthop_tab
[0].route_metric
;
375 protocol_distance
= nexthop_tab
[0].protocol_distance
;
379 * FIXME: Non-recursive nexthop ensured only for first ifindex.
380 * However, recursive route lookup should really be fixed in
384 * So Zebra for NEXTHOP_TYPE_IPV4 returns the ifindex now since
385 * it was being stored. This Doesn't solve all cases of
386 * recursive lookup but for the most common types it does.
388 first_ifindex
= nexthop_tab
[0].ifindex
;
389 nexthop_addr
= nexthop_tab
[0].nexthop_addr
;
390 if (first_ifindex
> 0) {
391 /* found: first ifindex is non-recursive nexthop */
394 /* Report non-recursive success after first
396 if (PIM_DEBUG_ZEBRA
) {
397 char addr_str
[INET_ADDRSTRLEN
];
398 pim_inet4_dump("<addr?>", addr
,
402 "%s %s: lookup=%d/%d: found non-recursive ifindex=%d for address %s dist=%d met=%d",
403 __FILE__
, __PRETTY_FUNCTION__
,
405 first_ifindex
, addr_str
,
408 nexthop_tab
[0].route_metric
);
411 /* use last address as nexthop address */
412 nexthop_tab
[0].nexthop_addr
.u
.prefix4
= addr
;
414 /* report original route metric/distance */
415 nexthop_tab
[0].route_metric
= route_metric
;
416 nexthop_tab
[0].protocol_distance
=
423 if (PIM_DEBUG_ZEBRA
) {
424 char addr_str
[INET_ADDRSTRLEN
];
425 char nexthop_str
[PREFIX_STRLEN
];
426 pim_inet4_dump("<addr?>", addr
, addr_str
,
428 pim_addr_dump("<nexthop?>", &nexthop_addr
, nexthop_str
,
429 sizeof(nexthop_str
));
431 "%s %s: lookup=%d/%d: zebra returned recursive nexthop %s for address %s dist=%d met=%d",
432 __FILE__
, __PRETTY_FUNCTION__
, lookup
,
433 max_lookup
, nexthop_str
, addr_str
,
434 nexthop_tab
[0].protocol_distance
,
435 nexthop_tab
[0].route_metric
);
438 addr
= nexthop_addr
.u
.prefix4
; /* use nexthop addr for
441 } /* for (max_lookup) */
443 if (PIM_DEBUG_ZEBRA
) {
444 char addr_str
[INET_ADDRSTRLEN
];
445 pim_inet4_dump("<addr?>", addr
, addr_str
, sizeof(addr_str
));
447 "%s %s: lookup=%d/%d: failure searching recursive nexthop ifindex for address %s",
448 __FILE__
, __PRETTY_FUNCTION__
, lookup
, max_lookup
,
455 void pim_zlookup_show_ip_multicast(struct vty
*vty
)
457 vty_out(vty
, "Zclient lookup socket: ");
459 vty_out(vty
, "%d failures=%d\n", zlookup
->sock
, zlookup
->fail
);
461 vty_out(vty
, "<null zclient>\n");
465 int pim_zlookup_sg_statistics(struct channel_oil
*c_oil
)
467 struct stream
*s
= zlookup
->obuf
;
468 uint16_t command
= 0;
469 unsigned long long lastused
;
473 struct interface
*ifp
=
474 pim_if_find_by_vif_index(c_oil
->oil
.mfcc_parent
);
476 if (PIM_DEBUG_ZEBRA
) {
477 struct prefix_sg more
;
479 more
.src
= c_oil
->oil
.mfcc_origin
;
480 more
.grp
= c_oil
->oil
.mfcc_mcastgrp
;
482 "Sending Request for New Channel Oil Information(%s) VIIF %d",
483 pim_str_sg_dump(&more
), c_oil
->oil
.mfcc_parent
);
490 zclient_create_header(s
, ZEBRA_IPMR_ROUTE_STATS
, VRF_DEFAULT
);
491 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_origin
);
492 stream_put_in_addr(s
, &c_oil
->oil
.mfcc_mcastgrp
);
493 stream_putl(s
, ifp
->ifindex
);
494 stream_putw_at(s
, 0, stream_get_endp(s
));
496 count
= stream_get_endp(s
);
497 ret
= writen(zlookup
->sock
, s
->data
, count
);
500 "%s %s: writen() failure: %d writing to zclient lookup socket",
501 __FILE__
, __PRETTY_FUNCTION__
, errno
);
507 while (command
!= ZEBRA_IPMR_ROUTE_STATS
) {
515 err
= zclient_read_header(s
, zlookup
->sock
, &length
, &marker
,
516 &version
, &vrf_id
, &command
);
518 zlog_err("%s %s: zclient_read_header() failed",
519 __FILE__
, __PRETTY_FUNCTION__
);
520 zclient_lookup_failed(zlookup
);
525 sg
.src
.s_addr
= stream_get_ipv4(s
);
526 sg
.grp
.s_addr
= stream_get_ipv4(s
);
527 if (sg
.src
.s_addr
!= c_oil
->oil
.mfcc_origin
.s_addr
528 || sg
.grp
.s_addr
!= c_oil
->oil
.mfcc_mcastgrp
.s_addr
) {
529 zlog_err("%s: Received wrong %s information",
530 __PRETTY_FUNCTION__
, pim_str_sg_dump(&sg
));
531 zclient_lookup_failed(zlookup
);
535 stream_get(&lastused
, s
, sizeof(lastused
));
536 ret
= stream_getl(s
);
539 zlog_debug("Received %lld for %s success: %d", lastused
,
540 pim_str_sg_dump(&sg
), ret
);
542 c_oil
->cc
.lastused
= lastused
;