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Amir Guindehi <amir@datacore.ch>
[mirror_frr.git] / bgpd / bgp_snmp.c
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718e3744 1/* BGP4 SNMP support
2 Copyright (C) 1999, 2000 Kunihiro Ishiguro
3
4This file is part of GNU Zebra.
5
6GNU Zebra is free software; you can redistribute it and/or modify it
7under the terms of the GNU General Public License as published by the
8Free Software Foundation; either version 2, or (at your option) any
9later version.
10
11GNU Zebra is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Zebra; see the file COPYING. If not, write to the Free
18Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
1902111-1307, USA. */
20
21#include <zebra.h>
22
23#ifdef HAVE_SNMP
24#include <asn1.h>
25#include <snmp.h>
26#include <snmp_impl.h>
27
28#include "if.h"
29#include "log.h"
30#include "prefix.h"
31#include "command.h"
32#include "thread.h"
33#include "smux.h"
34
35#include "bgpd/bgpd.h"
36#include "bgpd/bgp_table.h"
37#include "bgpd/bgp_aspath.h"
38#include "bgpd/bgp_attr.h"
39#include "bgpd/bgp_route.h"
40#include "bgpd/bgp_fsm.h"
41\f
42/* BGP4-MIB described in RFC1657. */
43#define BGP4MIB 1,3,6,1,2,1,15
44
45/* Zebra enterprise BGP MIB. This variable is used for register
46 OSPF MIB to SNMP agent under SMUX protocol. */
47#define BGPDMIB 1,3,6,1,4,1,3317,1,2,2
48
49/* BGP MIB bgpVersion. */
50#define BGPVERSION 0
51
52/* BGP MIB bgpLocalAs. */
53#define BGPLOCALAS 0
54
55/* BGP MIB bgpPeerTable. */
56#define BGPPEERIDENTIFIER 1
57#define BGPPEERSTATE 2
58#define BGPPEERADMINSTATUS 3
59#define BGPPEERNEGOTIATEDVERSION 4
60#define BGPPEERLOCALADDR 5
61#define BGPPEERLOCALPORT 6
62#define BGPPEERREMOTEADDR 7
63#define BGPPEERREMOTEPORT 8
64#define BGPPEERREMOTEAS 9
65#define BGPPEERINUPDATES 10
66#define BGPPEEROUTUPDATES 11
67#define BGPPEERINTOTALMESSAGES 12
68#define BGPPEEROUTTOTALMESSAGES 13
69#define BGPPEERLASTERROR 14
70#define BGPPEERFSMESTABLISHEDTRANSITIONS 15
71#define BGPPEERFSMESTABLISHEDTIME 16
72#define BGPPEERCONNECTRETRYINTERVAL 17
73#define BGPPEERHOLDTIME 18
74#define BGPPEERKEEPALIVE 19
75#define BGPPEERHOLDTIMECONFIGURED 20
76#define BGPPEERKEEPALIVECONFIGURED 21
77#define BGPPEERMINASORIGINATIONINTERVAL 22
78#define BGPPEERMINROUTEADVERTISEMENTINTERVAL 23
79#define BGPPEERINUPDATEELAPSEDTIME 24
80
81/* BGP MIB bgpIdentifier. */
82#define BGPIDENTIFIER 0
83
84/* BGP MIB bgpRcvdPathAttrTable */
85#define BGPPATHATTRPEER 1
86#define BGPPATHATTRDESTNETWORK 2
87#define BGPPATHATTRORIGIN 3
88#define BGPPATHATTRASPATH 4
89#define BGPPATHATTRNEXTHOP 5
90#define BGPPATHATTRINTERASMETRIC 6
91
92/* BGP MIB bgp4PathAttrTable. */
93#define BGP4PATHATTRPEER 1
94#define BGP4PATHATTRIPADDRPREFIXLEN 2
95#define BGP4PATHATTRIPADDRPREFIX 3
96#define BGP4PATHATTRORIGIN 4
97#define BGP4PATHATTRASPATHSEGMENT 5
98#define BGP4PATHATTRNEXTHOP 6
99#define BGP4PATHATTRMULTIEXITDISC 7
100#define BGP4PATHATTRLOCALPREF 8
101#define BGP4PATHATTRATOMICAGGREGATE 9
102#define BGP4PATHATTRAGGREGATORAS 10
103#define BGP4PATHATTRAGGREGATORADDR 11
104#define BGP4PATHATTRCALCLOCALPREF 12
105#define BGP4PATHATTRBEST 13
106#define BGP4PATHATTRUNKNOWN 14
107
108/* SNMP value hack. */
109#define INTEGER ASN_INTEGER
110#define INTEGER32 ASN_INTEGER
111#define COUNTER32 ASN_COUNTER
112#define OCTET_STRING ASN_OCTET_STR
113#define IPADDRESS ASN_IPADDRESS
114#define GAUGE32 ASN_UNSIGNED
115\f
116/* Declare static local variables for convenience. */
117SNMP_LOCAL_VARIABLES
118
119/* BGP-MIB instances. */
120oid bgp_oid [] = { BGP4MIB };
121oid bgpd_oid [] = { BGPDMIB };
122
123/* IP address 0.0.0.0. */
124static struct in_addr bgp_empty_addr = {0};
125
126/* Hook functions. */
127static u_char *bgpVersion ();
128static u_char *bgpLocalAs ();
129static u_char *bgpPeerTable ();
130static u_char *bgpRcvdPathAttrTable ();
131static u_char *bgpIdentifier ();
132static u_char *bgp4PathAttrTable ();
133/* static u_char *bgpTraps (); */
134
135struct variable bgp_variables[] =
136{
137 /* BGP version. */
138 {BGPVERSION, OCTET_STRING, RONLY, bgpVersion,
139 1, {1}},
140 /* BGP local AS. */
141 {BGPLOCALAS, INTEGER, RONLY, bgpLocalAs,
142 1, {2}},
143 /* BGP peer table. */
144 {BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable,
145 3, {3, 1, 1}},
146 {BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable,
147 3, {3, 1, 2}},
148 {BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable,
149 3, {3, 1, 3}},
150 {BGPPEERNEGOTIATEDVERSION, INTEGER32, RONLY, bgpPeerTable,
151 3, {3, 1, 4}},
152 {BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable,
153 3, {3, 1, 5}},
154 {BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable,
155 3, {3, 1, 6}},
156 {BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable,
157 3, {3, 1, 7}},
158 {BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable,
159 3, {3, 1, 8}},
160 {BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable,
161 3, {3, 1, 9}},
162 {BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable,
163 3, {3, 1, 10}},
164 {BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable,
165 3, {3, 1, 11}},
166 {BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable,
167 3, {3, 1, 12}},
168 {BGPPEEROUTTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable,
169 3, {3, 1, 13}},
170 {BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable,
171 3, {3, 1, 14}},
172 {BGPPEERFSMESTABLISHEDTRANSITIONS, COUNTER32, RONLY, bgpPeerTable,
173 3, {3, 1, 15}},
174 {BGPPEERFSMESTABLISHEDTIME, GAUGE32, RONLY, bgpPeerTable,
175 3, {3, 1, 16}},
176 {BGPPEERCONNECTRETRYINTERVAL, INTEGER, RWRITE, bgpPeerTable,
177 3, {3, 1, 17}},
178 {BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable,
179 3, {3, 1, 18}},
180 {BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable,
181 3, {3, 1, 19}},
182 {BGPPEERHOLDTIMECONFIGURED, INTEGER, RWRITE, bgpPeerTable,
183 3, {3, 1, 20}},
184 {BGPPEERKEEPALIVECONFIGURED, INTEGER, RWRITE, bgpPeerTable,
185 3, {3, 1, 21}},
186 {BGPPEERMINASORIGINATIONINTERVAL, INTEGER, RWRITE, bgpPeerTable,
187 3, {3, 1, 22}},
188 {BGPPEERMINROUTEADVERTISEMENTINTERVAL, INTEGER, RWRITE, bgpPeerTable,
189 3, {3, 1, 23}},
190 {BGPPEERINUPDATEELAPSEDTIME, GAUGE32, RONLY, bgpPeerTable,
191 3, {3, 1, 24}},
192 /* BGP identifier. */
193 {BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier,
194 1, {4}},
195 /* BGP received path attribute table. */
196 {BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
197 3, {5, 1, 1}},
198 {BGPPATHATTRDESTNETWORK, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
199 3, {5, 1, 2}},
200 {BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable,
201 3, {5, 1, 3}},
202 {BGPPATHATTRASPATH, OCTET_STRING, RONLY, bgpRcvdPathAttrTable,
203 3, {5, 1, 4}},
204 {BGPPATHATTRNEXTHOP, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
205 3, {5, 1, 5}},
206 {BGPPATHATTRINTERASMETRIC, INTEGER32, RONLY, bgpRcvdPathAttrTable,
207 3, {5, 1, 6}},
208 /* BGP-4 received path attribute table. */
209 {BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable,
210 3, {6, 1, 1}},
211 {BGP4PATHATTRIPADDRPREFIXLEN, INTEGER, RONLY, bgp4PathAttrTable,
212 3, {6, 1, 2}},
213 {BGP4PATHATTRIPADDRPREFIX, IPADDRESS, RONLY, bgp4PathAttrTable,
214 3, {6, 1, 3}},
215 {BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable,
216 3, {6, 1, 4}},
217 {BGP4PATHATTRASPATHSEGMENT, OCTET_STRING, RONLY, bgp4PathAttrTable,
218 3, {6, 1, 5}},
219 {BGP4PATHATTRNEXTHOP, IPADDRESS, RONLY, bgp4PathAttrTable,
220 3, {6, 1, 6}},
221 {BGP4PATHATTRMULTIEXITDISC, INTEGER, RONLY, bgp4PathAttrTable,
222 3, {6, 1, 7}},
223 {BGP4PATHATTRLOCALPREF, INTEGER, RONLY, bgp4PathAttrTable,
224 3, {6, 1, 8}},
225 {BGP4PATHATTRATOMICAGGREGATE, INTEGER, RONLY, bgp4PathAttrTable,
226 3, {6, 1, 9}},
227 {BGP4PATHATTRAGGREGATORAS, INTEGER, RONLY, bgp4PathAttrTable,
228 3, {6, 1, 10}},
229 {BGP4PATHATTRAGGREGATORADDR, IPADDRESS, RONLY, bgp4PathAttrTable,
230 3, {6, 1, 11}},
231 {BGP4PATHATTRCALCLOCALPREF, INTEGER, RONLY, bgp4PathAttrTable,
232 3, {6, 1, 12}},
233 {BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable,
234 3, {6, 1, 13}},
235 {BGP4PATHATTRUNKNOWN, OCTET_STRING, RONLY, bgp4PathAttrTable,
236 3, {6, 1, 14}},
237};
238\f
239static u_char *
240bgpVersion (struct variable *v, oid name[], size_t *length, int exact,
241 size_t *var_len, WriteMethod **write_method)
242{
243 static u_char version;
244
245 if (smux_header_generic(v, name, length, exact, var_len, write_method)
246 == MATCH_FAILED)
247 return NULL;
248
249 /* Retrun BGP version. Zebra bgpd only support version 4. */
250 version = (0x80 >> (BGP_VERSION_4 - 1));
251
252 /* Return octet string length 1. */
253 *var_len = 1;
254 return (u_char *)&version;
255}
256
257static u_char *
258bgpLocalAs (struct variable *v, oid name[], size_t *length,
259 int exact, size_t *var_len, WriteMethod **write_method)
260{
261 struct bgp *bgp;
262
263 if (smux_header_generic(v, name, length, exact, var_len, write_method)
264 == MATCH_FAILED)
265 return NULL;
266
267 /* Get BGP structure. */
268 bgp = bgp_get_default ();
269 if (! bgp)
270 return NULL;
271
272 return SNMP_INTEGER (bgp->as);
273}
274
275struct peer *
276peer_lookup_addr_ipv4 (struct in_addr *src)
277{
278 struct bgp *bgp;
279 struct peer *peer;
280 struct listnode *nn;
281 struct in_addr addr;
282 int ret;
283
284 bgp = bgp_get_default ();
285 if (! bgp)
286 return NULL;
287
288 LIST_LOOP (bgp->peer, peer, nn)
289 {
290 ret = inet_pton (AF_INET, peer->host, &addr);
291 if (ret > 0)
292 {
293 if (IPV4_ADDR_SAME (&addr, src))
294 return peer;
295 }
296 }
297 return NULL;
298}
299
300struct peer *
301bgp_peer_lookup_next (struct in_addr *src)
302{
303 struct bgp *bgp;
304 struct peer *peer;
305 struct listnode *nn;
306 struct in_addr *p;
307 union sockunion su;
308 int ret;
309
310 memset (&su, 0, sizeof (union sockunion));
311
312 bgp = bgp_get_default ();
313 if (! bgp)
314 return NULL;
315
316 LIST_LOOP (bgp->peer, peer, nn)
317 {
318 ret = inet_pton (AF_INET, peer->host, &su.sin.sin_addr);
319 if (ret > 0)
320 {
321 p = &su.sin.sin_addr;
322
323 if (ntohl (p->s_addr) > ntohl (src->s_addr))
324 {
325 src->s_addr = p->s_addr;
326 return peer;
327 }
328 }
329 }
330 return NULL;
331}
332
333struct peer *
334bgpPeerTable_lookup (struct variable *v, oid name[], size_t *length,
335 struct in_addr *addr, int exact)
336{
337 struct peer *peer = NULL;
338 int len;
339
340 if (exact)
341 {
342 /* Check the length. */
343 if (*length - v->namelen != sizeof (struct in_addr))
344 return NULL;
345
346 oid2in_addr (name + v->namelen, IN_ADDR_SIZE, addr);
347
348 peer = peer_lookup_addr_ipv4 (addr);
349 return peer;
350 }
351 else
352 {
353 len = *length - v->namelen;
354 if (len > 4) len = 4;
355
356 oid2in_addr (name + v->namelen, len, addr);
357
358 peer = bgp_peer_lookup_next (addr);
359
360 if (peer == NULL)
361 return NULL;
362
363 oid_copy_addr (name + v->namelen, addr, sizeof (struct in_addr));
364 *length = sizeof (struct in_addr) + v->namelen;
365
366 return peer;
367 }
368 return NULL;
369}
370
371/* BGP write methods. */
372int
373write_bgpPeerTable (int action, u_char *var_val,
374 u_char var_val_type, size_t var_val_len,
375 u_char *statP, oid *name, size_t length,
376 struct variable *v)
377{
378 struct in_addr addr;
379 struct peer *peer;
380 long intval;
381 int bigsize = SNMP_MAX_LEN;
382
383 if (var_val_type != ASN_INTEGER)
384 {
385 return SNMP_ERR_WRONGTYPE;
386 }
387 if (var_val_len != sizeof (long))
388 {
389 return SNMP_ERR_WRONGLENGTH;
390 }
391
392 if (! asn_parse_int(var_val, &bigsize, &var_val_type,
393 &intval, sizeof(long)))
394 {
395 return SNMP_ERR_WRONGENCODING;
396 }
397
398 memset (&addr, 0, sizeof (struct in_addr));
399
400 peer = bgpPeerTable_lookup (v, name, &length, &addr, 1);
401 if (! peer)
402 return SNMP_ERR_NOSUCHNAME;
403
404 printf ("val: %ld\n", intval);
405
406 switch (v->magic)
407 {
408 case BGPPEERADMINSTATUS:
409#define BGP_PeerAdmin_stop 1
410#define BGP_PeerAdmin_start 2
411 /* When the peer is established, */
412 if (intval == BGP_PeerAdmin_stop)
413 BGP_EVENT_ADD (peer, BGP_Stop);
414 else if (intval == BGP_PeerAdmin_start)
415 ; /* Do nothing. */
416 else
417 return SNMP_ERR_NOSUCHNAME;
418 break;
419 case BGPPEERCONNECTRETRYINTERVAL:
420 SET_FLAG (peer->config, PEER_CONFIG_CONNECT);
421 peer->connect = intval;
422 peer->v_connect = intval;
423 break;
424 case BGPPEERHOLDTIMECONFIGURED:
425 SET_FLAG (peer->config, PEER_CONFIG_TIMER);
426 peer->holdtime = intval;
427 peer->v_holdtime = intval;
428 break;
429 case BGPPEERKEEPALIVECONFIGURED:
430 SET_FLAG (peer->config, PEER_CONFIG_TIMER);
431 peer->keepalive = intval;
432 peer->v_keepalive = intval;
433 break;
434 case BGPPEERMINASORIGINATIONINTERVAL:
435 peer->v_asorig = intval;
436 break;
437 case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
438 peer->v_routeadv = intval;
439 break;
440 }
441 return SNMP_ERR_NOERROR;
442}
443
444u_char *
445bgpPeerTable (struct variable *v, oid name[], size_t *length,
446 int exact, size_t *var_len, WriteMethod **write_method)
447{
448 static struct in_addr addr;
449 struct peer *peer;
450
451 *write_method = NULL;
452 memset (&addr, 0, sizeof (struct in_addr));
453
454 peer = bgpPeerTable_lookup (v, name, length, &addr, exact);
455 if (! peer)
456 return NULL;
457
458 switch (v->magic)
459 {
460 case BGPPEERIDENTIFIER:
461 return SNMP_IPADDRESS (peer->remote_id);
462 break;
463 case BGPPEERSTATE:
464 return SNMP_INTEGER (peer->status);
465 break;
466 case BGPPEERADMINSTATUS:
467 *write_method = write_bgpPeerTable;
468#define BGP_PeerAdmin_stop 1
469#define BGP_PeerAdmin_start 2
470 if (CHECK_FLAG (peer->flags, PEER_FLAG_SHUTDOWN))
471 return SNMP_INTEGER (BGP_PeerAdmin_stop);
472 else
473 return SNMP_INTEGER (BGP_PeerAdmin_start);
474 break;
475 case BGPPEERNEGOTIATEDVERSION:
476 return SNMP_INTEGER (peer->version);
477 break;
478 case BGPPEERLOCALADDR:
479 if (peer->su_local)
480 return SNMP_IPADDRESS (peer->su_local->sin.sin_addr);
481 else
482 return SNMP_IPADDRESS (bgp_empty_addr);
483 break;
484 case BGPPEERLOCALPORT:
485 if (peer->su_local)
486 return SNMP_INTEGER (ntohs (peer->su_local->sin.sin_port));
487 else
488 return SNMP_INTEGER (0);
489 break;
490 case BGPPEERREMOTEADDR:
491 if (peer->su_remote)
492 return SNMP_IPADDRESS (peer->su_remote->sin.sin_addr);
493 else
494 return SNMP_IPADDRESS (bgp_empty_addr);
495 break;
496 case BGPPEERREMOTEPORT:
497 if (peer->su_remote)
498 return SNMP_INTEGER (ntohs (peer->su_remote->sin.sin_port));
499 else
500 return SNMP_INTEGER (0);
501 break;
502 case BGPPEERREMOTEAS:
503 return SNMP_INTEGER (peer->as);
504 break;
505 case BGPPEERINUPDATES:
506 return SNMP_INTEGER (peer->update_in);
507 break;
508 case BGPPEEROUTUPDATES:
509 return SNMP_INTEGER (peer->update_out);
510 break;
511 case BGPPEERINTOTALMESSAGES:
512 return SNMP_INTEGER (peer->open_in + peer->update_in
513 + peer->keepalive_in + peer->notify_in
514 + peer->refresh_in + peer->dynamic_cap_in);
515 break;
516 case BGPPEEROUTTOTALMESSAGES:
517 return SNMP_INTEGER (peer->open_out + peer->update_out
518 + peer->keepalive_out + peer->notify_out
519 + peer->refresh_out, peer->dynamic_cap_out);
520 break;
521 case BGPPEERLASTERROR:
522 {
523 static u_char lasterror[2];
524 lasterror[0] = peer->notify.code;
525 lasterror[1] = peer->notify.subcode;
526 *var_len = 2;
527 return (u_char *)&lasterror;
528 }
529 break;
530 case BGPPEERFSMESTABLISHEDTRANSITIONS:
531 return SNMP_INTEGER (peer->established);
532 break;
533 case BGPPEERFSMESTABLISHEDTIME:
534 if (peer->uptime == 0)
535 return SNMP_INTEGER (0);
536 else
537 return SNMP_INTEGER (time (NULL) - peer->uptime);
538 break;
539 case BGPPEERCONNECTRETRYINTERVAL:
540 *write_method = write_bgpPeerTable;
541 return SNMP_INTEGER (peer->v_connect);
542 break;
543 case BGPPEERHOLDTIME:
544 return SNMP_INTEGER (peer->v_holdtime);
545 break;
546 case BGPPEERKEEPALIVE:
547 return SNMP_INTEGER (peer->v_keepalive);
548 break;
549 case BGPPEERHOLDTIMECONFIGURED:
550 *write_method = write_bgpPeerTable;
551 if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER))
552 return SNMP_INTEGER (peer->holdtime);
553 else
554 return SNMP_INTEGER (peer->v_holdtime);
555 break;
556 case BGPPEERKEEPALIVECONFIGURED:
557 *write_method = write_bgpPeerTable;
558 if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER))
559 return SNMP_INTEGER (peer->keepalive);
560 else
561 return SNMP_INTEGER (peer->v_keepalive);
562 break;
563 case BGPPEERMINASORIGINATIONINTERVAL:
564 *write_method = write_bgpPeerTable;
565 return SNMP_INTEGER (peer->v_asorig);
566 break;
567 case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
568 *write_method = write_bgpPeerTable;
569 return SNMP_INTEGER (peer->v_routeadv);
570 break;
571 case BGPPEERINUPDATEELAPSEDTIME:
572 if (peer->update_time == 0)
573 return SNMP_INTEGER (0);
574 else
575 return SNMP_INTEGER (time (NULL) - peer->update_time);
576 break;
577 default:
578 return NULL;
579 break;
580 }
581 return NULL;
582}
583
584u_char *
585bgpIdentifier (struct variable *v, oid name[], size_t *length,
586 int exact, size_t *var_len, WriteMethod **write_method)
587{
588 struct bgp *bgp;
589
590 if (smux_header_generic(v, name, length, exact, var_len, write_method)
591 == MATCH_FAILED)
592 return NULL;
593
594 bgp = bgp_get_default ();
595 if (!bgp)
596 return NULL;
597
598 return SNMP_IPADDRESS (bgp->router_id);
599}
600
601u_char *
602bgpRcvdPathAttrTable (struct variable *v, oid name[], size_t *length,
603 int exact, size_t *var_len, WriteMethod **write_method)
604{
605 /* Received Path Attribute Table. This table contains, one entry
606 per path to a network, path attributes received from all peers
607 running BGP version 3 or less. This table is obsolete, having
608 been replaced in functionality with the bgp4PathAttrTable. */
609 return NULL;
610}
611
612struct bgp_info *
613bgp4PathAttrLookup (struct variable *v, oid name[], size_t *length,
614 struct bgp *bgp, struct prefix_ipv4 *addr, int exact)
615{
616 oid *offset;
617 int offsetlen;
618 struct bgp_info *binfo;
619 struct bgp_info *min;
620 struct bgp_node *rn;
621 union sockunion su;
622 int len;
623 struct in_addr paddr;
624
625#define BGP_PATHATTR_ENTRY_OFFSET \
626 (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE)
627
628 if (exact)
629 {
630 if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET)
631 return NULL;
632
633 /* Set OID offset for prefix. */
634 offset = name + v->namelen;
635 oid2in_addr (offset, IN_ADDR_SIZE, &addr->prefix);
636 offset += IN_ADDR_SIZE;
637
638 /* Prefix length. */
639 addr->prefixlen = *offset;
640 offset++;
641
642 /* Peer address. */
643 su.sin.sin_family = AF_INET;
644 oid2in_addr (offset, IN_ADDR_SIZE, &su.sin.sin_addr);
645
646 /* Lookup node. */
647 rn = bgp_node_lookup (bgp->rib[AFI_IP][SAFI_UNICAST],
648 (struct prefix *) addr);
649 if (rn)
650 {
651 bgp_unlock_node (rn);
652
653 for (binfo = rn->info; binfo; binfo = binfo->next)
654 if (sockunion_same (&binfo->peer->su, &su))
655 return binfo;
656 }
657 }
658 else
659 {
660 offset = name + v->namelen;
661 offsetlen = *length - v->namelen;
662 len = offsetlen;
663
664 if (offsetlen == 0)
665 rn = bgp_table_top (bgp->rib[AFI_IP][SAFI_UNICAST]);
666 else
667 {
668 if (len > IN_ADDR_SIZE)
669 len = IN_ADDR_SIZE;
670
671 oid2in_addr (offset, len, &addr->prefix);
672
673 offset += IN_ADDR_SIZE;
674 offsetlen -= IN_ADDR_SIZE;
675
676 if (offsetlen > 0)
677 addr->prefixlen = *offset;
678 else
679 addr->prefixlen = len * 8;
680
681 rn = bgp_node_get (bgp->rib[AFI_IP][SAFI_UNICAST],
682 (struct prefix *) addr);
683
684 offset++;
685 offsetlen--;
686 }
687
688 if (offsetlen > 0)
689 {
690 len = offsetlen;
691 if (len > IN_ADDR_SIZE)
692 len = IN_ADDR_SIZE;
693
694 oid2in_addr (offset, len, &paddr);
695 }
696 else
697 paddr.s_addr = 0;
698
699 if (! rn)
700 return NULL;
701
702 do
703 {
704 min = NULL;
705
706 for (binfo = rn->info; binfo; binfo = binfo->next)
707 {
708 if (binfo->peer->su.sin.sin_family == AF_INET
709 && ntohl (paddr.s_addr)
710 < ntohl (binfo->peer->su.sin.sin_addr.s_addr))
711 {
712 if (min)
713 {
714 if (ntohl (binfo->peer->su.sin.sin_addr.s_addr)
715 < ntohl (min->peer->su.sin.sin_addr.s_addr))
716 min = binfo;
717 }
718 else
719 min = binfo;
720 }
721 }
722
723 if (min)
724 {
725 *length = v->namelen + BGP_PATHATTR_ENTRY_OFFSET;
726
727 offset = name + v->namelen;
728 oid_copy_addr (offset, &rn->p.u.prefix4, IN_ADDR_SIZE);
729 offset += IN_ADDR_SIZE;
730 *offset = rn->p.prefixlen;
731 offset++;
732 oid_copy_addr (offset, &min->peer->su.sin.sin_addr,
733 IN_ADDR_SIZE);
734 addr->prefix = rn->p.u.prefix4;
735 addr->prefixlen = rn->p.prefixlen;
736
737 bgp_unlock_node (rn);
738
739 return min;
740 }
741
742 paddr.s_addr = 0;
743 }
744 while ((rn = bgp_route_next (rn)) != NULL);
745 }
746 return NULL;
747}
748
749u_char *
750bgp4PathAttrTable (struct variable *v, oid name[], size_t *length,
751 int exact, size_t *var_len, WriteMethod **write_method)
752{
753 struct bgp *bgp;
754 struct bgp_info *binfo;
755 struct prefix_ipv4 addr;
756
757 bgp = bgp_get_default ();
758 if (! bgp)
759 return NULL;
760
761 memset (&addr, 0, sizeof (struct prefix_ipv4));
762
763 binfo = bgp4PathAttrLookup (v, name, length, bgp, &addr, exact);
764 if (! binfo)
765 return NULL;
766
767 switch (v->magic)
768 {
769 case BGP4PATHATTRPEER: /* 1 */
770 return SNMP_IPADDRESS (binfo->peer->su.sin.sin_addr);
771 break;
772 case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */
773 return SNMP_INTEGER (addr.prefixlen);
774 break;
775 case BGP4PATHATTRIPADDRPREFIX: /* 3 */
776 return SNMP_IPADDRESS (addr.prefix);
777 break;
778 case BGP4PATHATTRORIGIN: /* 4 */
779 return SNMP_INTEGER (binfo->attr->origin);
780 break;
781 case BGP4PATHATTRASPATHSEGMENT: /* 5 */
782 *var_len = binfo->attr->aspath->length;
783 return (u_char *) binfo->attr->aspath->data;
784 break;
785 case BGP4PATHATTRNEXTHOP: /* 6 */
786 return SNMP_IPADDRESS (binfo->attr->nexthop);
787 break;
788 case BGP4PATHATTRMULTIEXITDISC: /* 7 */
789 return SNMP_INTEGER (binfo->attr->med);
790 break;
791 case BGP4PATHATTRLOCALPREF: /* 8 */
792 return SNMP_INTEGER (binfo->attr->local_pref);
793 break;
794 case BGP4PATHATTRATOMICAGGREGATE: /* 9 */
795 return SNMP_INTEGER (1);
796 break;
797 case BGP4PATHATTRAGGREGATORAS: /* 10 */
798 return SNMP_INTEGER (binfo->attr->aggregator_as);
799 break;
800 case BGP4PATHATTRAGGREGATORADDR: /* 11 */
801 return SNMP_IPADDRESS (binfo->attr->aggregator_addr);
802 break;
803 case BGP4PATHATTRCALCLOCALPREF: /* 12 */
804 return SNMP_INTEGER (-1);
805 break;
806 case BGP4PATHATTRBEST: /* 13 */
807#define BGP4_PathAttrBest_false 1
808#define BGP4_PathAttrBest_true 2
809 if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
810 return SNMP_INTEGER (BGP4_PathAttrBest_true);
811 else
812 return SNMP_INTEGER (BGP4_PathAttrBest_false);
813 break;
814 case BGP4PATHATTRUNKNOWN: /* 14 */
815 *var_len = 0;
816 return NULL;
817 break;
818 }
819 return NULL;
820}
821\f
822/* BGP Traps. */
823struct trap_object bgpTrapList[] =
824{
825 {bgpPeerTable, 3, {3, 1, BGPPEERREMOTEADDR}},
826 {bgpPeerTable, 3, {3, 1, BGPPEERLASTERROR}},
827 {bgpPeerTable, 3, {3, 1, BGPPEERSTATE}}
828};
829
830void
831bgpTrapEstablished (struct peer *peer)
832{
833 int ret;
834 struct in_addr addr;
835 oid index[sizeof (oid) * IN_ADDR_SIZE];
836
837 ret = inet_aton (peer->host, &addr);
838 if (ret == 0)
839 return;
840
841 oid_copy_addr (index, &addr, IN_ADDR_SIZE);
842
843 smux_trap (bgp_oid, sizeof bgp_oid / sizeof (oid),
844 index, IN_ADDR_SIZE,
845 bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object),
846 bm->start_time - time (NULL));
847}
848
849void
850bgpTrapBackwardTransition (struct peer *peer)
851{
852 int ret;
853 struct in_addr addr;
854 oid index[sizeof (oid) * IN_ADDR_SIZE];
855
856 ret = inet_aton (peer->host, &addr);
857 if (ret == 0)
858 return;
859
860 oid_copy_addr (index, &addr, IN_ADDR_SIZE);
861
862 smux_trap (bgp_oid, sizeof bgp_oid / sizeof (oid),
863 index, IN_ADDR_SIZE,
864 bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object),
865 bm->start_time - time (NULL));
866}
867
868void
869bgp_snmp_init ()
870{
871 smux_init (bgpd_oid, sizeof bgpd_oid / sizeof (oid));
872 REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid);
873 smux_start ();
874}
875#endif /* HAVE_SNMP */
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