1: /* BGP4 SNMP support
2: Copyright (C) 1999, 2000 Kunihiro Ishiguro
3:
4: This file is part of GNU Zebra.
5:
6: GNU Zebra is free software; you can redistribute it and/or modify it
7: under the terms of the GNU General Public License as published by the
8: Free Software Foundation; either version 2, or (at your option) any
9: later version.
10:
11: GNU Zebra is distributed in the hope that it will be useful, but
12: WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU Zebra; see the file COPYING. If not, write to the Free
18: Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
19: 02111-1307, USA. */
20:
21: #include <zebra.h>
22:
23: #ifdef HAVE_SNMP
24: #include <net-snmp/net-snmp-config.h>
25: #include <net-snmp/net-snmp-includes.h>
26:
27: #include "if.h"
28: #include "log.h"
29: #include "prefix.h"
30: #include "command.h"
31: #include "thread.h"
32: #include "smux.h"
33:
34: #include "bgpd/bgpd.h"
35: #include "bgpd/bgp_table.h"
36: #include "bgpd/bgp_aspath.h"
37: #include "bgpd/bgp_attr.h"
38: #include "bgpd/bgp_route.h"
39: #include "bgpd/bgp_fsm.h"
40: #include "bgpd/bgp_snmp.h"
41:
42: /* BGP4-MIB described in RFC1657. */
43: #define BGP4MIB 1,3,6,1,2,1,15
44:
45: /* BGP TRAP. */
46: #define BGPESTABLISHED 1
47: #define BGPBACKWARDTRANSITION 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:
116: /* Declare static local variables for convenience. */
117: SNMP_LOCAL_VARIABLES
118:
119: /* BGP-MIB instances. */
120: oid bgp_oid [] = { BGP4MIB };
121: oid bgp_trap_oid [] = { BGP4MIB, 0 };
122:
123: /* IP address 0.0.0.0. */
124: static struct in_addr bgp_empty_addr = {0};
125:
126: /* Hook functions. */
127: static u_char *bgpVersion (struct variable *, oid [], size_t *, int,
128: size_t *, WriteMethod **);
129: static u_char *bgpLocalAs (struct variable *, oid [], size_t *,
130: int, size_t *, WriteMethod **);
131: static u_char *bgpPeerTable (struct variable *, oid [], size_t *,
132: int, size_t *, WriteMethod **);
133: static u_char *bgpRcvdPathAttrTable (struct variable *, oid [], size_t *,
134: int, size_t *, WriteMethod **);
135: static u_char *bgpIdentifier (struct variable *, oid [], size_t *,
136: int, size_t *, WriteMethod **);
137: static u_char *bgp4PathAttrTable (struct variable *, oid [], size_t *,
138: int, size_t *, WriteMethod **);
139: /* static u_char *bgpTraps (); */
140:
141: struct variable bgp_variables[] =
142: {
143: /* BGP version. */
144: {BGPVERSION, OCTET_STRING, RONLY, bgpVersion,
145: 1, {1}},
146: /* BGP local AS. */
147: {BGPLOCALAS, INTEGER, RONLY, bgpLocalAs,
148: 1, {2}},
149: /* BGP peer table. */
150: {BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable,
151: 3, {3, 1, 1}},
152: {BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable,
153: 3, {3, 1, 2}},
154: {BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable,
155: 3, {3, 1, 3}},
156: {BGPPEERNEGOTIATEDVERSION, INTEGER32, RONLY, bgpPeerTable,
157: 3, {3, 1, 4}},
158: {BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable,
159: 3, {3, 1, 5}},
160: {BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable,
161: 3, {3, 1, 6}},
162: {BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable,
163: 3, {3, 1, 7}},
164: {BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable,
165: 3, {3, 1, 8}},
166: {BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable,
167: 3, {3, 1, 9}},
168: {BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable,
169: 3, {3, 1, 10}},
170: {BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable,
171: 3, {3, 1, 11}},
172: {BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable,
173: 3, {3, 1, 12}},
174: {BGPPEEROUTTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable,
175: 3, {3, 1, 13}},
176: {BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable,
177: 3, {3, 1, 14}},
178: {BGPPEERFSMESTABLISHEDTRANSITIONS, COUNTER32, RONLY, bgpPeerTable,
179: 3, {3, 1, 15}},
180: {BGPPEERFSMESTABLISHEDTIME, GAUGE32, RONLY, bgpPeerTable,
181: 3, {3, 1, 16}},
182: {BGPPEERCONNECTRETRYINTERVAL, INTEGER, RWRITE, bgpPeerTable,
183: 3, {3, 1, 17}},
184: {BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable,
185: 3, {3, 1, 18}},
186: {BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable,
187: 3, {3, 1, 19}},
188: {BGPPEERHOLDTIMECONFIGURED, INTEGER, RWRITE, bgpPeerTable,
189: 3, {3, 1, 20}},
190: {BGPPEERKEEPALIVECONFIGURED, INTEGER, RWRITE, bgpPeerTable,
191: 3, {3, 1, 21}},
192: {BGPPEERMINASORIGINATIONINTERVAL, INTEGER, RWRITE, bgpPeerTable,
193: 3, {3, 1, 22}},
194: {BGPPEERMINROUTEADVERTISEMENTINTERVAL, INTEGER, RWRITE, bgpPeerTable,
195: 3, {3, 1, 23}},
196: {BGPPEERINUPDATEELAPSEDTIME, GAUGE32, RONLY, bgpPeerTable,
197: 3, {3, 1, 24}},
198: /* BGP identifier. */
199: {BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier,
200: 1, {4}},
201: /* BGP received path attribute table. */
202: {BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
203: 3, {5, 1, 1}},
204: {BGPPATHATTRDESTNETWORK, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
205: 3, {5, 1, 2}},
206: {BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable,
207: 3, {5, 1, 3}},
208: {BGPPATHATTRASPATH, OCTET_STRING, RONLY, bgpRcvdPathAttrTable,
209: 3, {5, 1, 4}},
210: {BGPPATHATTRNEXTHOP, IPADDRESS, RONLY, bgpRcvdPathAttrTable,
211: 3, {5, 1, 5}},
212: {BGPPATHATTRINTERASMETRIC, INTEGER32, RONLY, bgpRcvdPathAttrTable,
213: 3, {5, 1, 6}},
214: /* BGP-4 received path attribute table. */
215: {BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable,
216: 3, {6, 1, 1}},
217: {BGP4PATHATTRIPADDRPREFIXLEN, INTEGER, RONLY, bgp4PathAttrTable,
218: 3, {6, 1, 2}},
219: {BGP4PATHATTRIPADDRPREFIX, IPADDRESS, RONLY, bgp4PathAttrTable,
220: 3, {6, 1, 3}},
221: {BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable,
222: 3, {6, 1, 4}},
223: {BGP4PATHATTRASPATHSEGMENT, OCTET_STRING, RONLY, bgp4PathAttrTable,
224: 3, {6, 1, 5}},
225: {BGP4PATHATTRNEXTHOP, IPADDRESS, RONLY, bgp4PathAttrTable,
226: 3, {6, 1, 6}},
227: {BGP4PATHATTRMULTIEXITDISC, INTEGER, RONLY, bgp4PathAttrTable,
228: 3, {6, 1, 7}},
229: {BGP4PATHATTRLOCALPREF, INTEGER, RONLY, bgp4PathAttrTable,
230: 3, {6, 1, 8}},
231: {BGP4PATHATTRATOMICAGGREGATE, INTEGER, RONLY, bgp4PathAttrTable,
232: 3, {6, 1, 9}},
233: {BGP4PATHATTRAGGREGATORAS, INTEGER, RONLY, bgp4PathAttrTable,
234: 3, {6, 1, 10}},
235: {BGP4PATHATTRAGGREGATORADDR, IPADDRESS, RONLY, bgp4PathAttrTable,
236: 3, {6, 1, 11}},
237: {BGP4PATHATTRCALCLOCALPREF, INTEGER, RONLY, bgp4PathAttrTable,
238: 3, {6, 1, 12}},
239: {BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable,
240: 3, {6, 1, 13}},
241: {BGP4PATHATTRUNKNOWN, OCTET_STRING, RONLY, bgp4PathAttrTable,
242: 3, {6, 1, 14}},
243: };
244:
245:
246: static u_char *
247: bgpVersion (struct variable *v, oid name[], size_t *length, int exact,
248: size_t *var_len, WriteMethod **write_method)
249: {
250: static u_char version;
251:
252: if (smux_header_generic(v, name, length, exact, var_len, write_method)
253: == MATCH_FAILED)
254: return NULL;
255:
256: /* Retrun BGP version. Zebra bgpd only support version 4. */
257: version = (0x80 >> (BGP_VERSION_4 - 1));
258:
259: /* Return octet string length 1. */
260: *var_len = 1;
261: return (u_char *)&version;
262: }
263:
264: static u_char *
265: bgpLocalAs (struct variable *v, oid name[], size_t *length,
266: int exact, size_t *var_len, WriteMethod **write_method)
267: {
268: struct bgp *bgp;
269:
270: if (smux_header_generic(v, name, length, exact, var_len, write_method)
271: == MATCH_FAILED)
272: return NULL;
273:
274: /* Get BGP structure. */
275: bgp = bgp_get_default ();
276: if (! bgp)
277: return NULL;
278:
279: return SNMP_INTEGER (bgp->as);
280: }
281:
282: static struct peer *
283: peer_lookup_addr_ipv4 (struct in_addr *src)
284: {
285: struct bgp *bgp;
286: struct peer *peer;
287: struct listnode *node;
288: struct in_addr addr;
289: int ret;
290:
291: bgp = bgp_get_default ();
292: if (! bgp)
293: return NULL;
294:
295: for (ALL_LIST_ELEMENTS_RO (bgp->peer, node, peer))
296: {
297: ret = inet_pton (AF_INET, peer->host, &addr);
298: if (ret > 0)
299: {
300: if (IPV4_ADDR_SAME (&addr, src))
301: return peer;
302: }
303: }
304: return NULL;
305: }
306:
307: static struct peer *
308: bgp_peer_lookup_next (struct in_addr *src)
309: {
310: struct bgp *bgp;
311: struct peer *peer;
312: struct listnode *node;
313: struct in_addr *p;
314: union sockunion su;
315: int ret;
316:
317: memset (&su, 0, sizeof (union sockunion));
318:
319: bgp = bgp_get_default ();
320: if (! bgp)
321: return NULL;
322:
323: for (ALL_LIST_ELEMENTS_RO (bgp->peer, node, peer))
324: {
325: ret = inet_pton (AF_INET, peer->host, &su.sin.sin_addr);
326: if (ret > 0)
327: {
328: p = &su.sin.sin_addr;
329:
330: if (ntohl (p->s_addr) > ntohl (src->s_addr))
331: {
332: src->s_addr = p->s_addr;
333: return peer;
334: }
335: }
336: }
337: return NULL;
338: }
339:
340: static struct peer *
341: bgpPeerTable_lookup (struct variable *v, oid name[], size_t *length,
342: struct in_addr *addr, int exact)
343: {
344: struct peer *peer = NULL;
345: int len;
346:
347: if (exact)
348: {
349: /* Check the length. */
350: if (*length - v->namelen != sizeof (struct in_addr))
351: return NULL;
352:
353: oid2in_addr (name + v->namelen, IN_ADDR_SIZE, addr);
354:
355: peer = peer_lookup_addr_ipv4 (addr);
356: return peer;
357: }
358: else
359: {
360: len = *length - v->namelen;
361: if (len > 4) len = 4;
362:
363: oid2in_addr (name + v->namelen, len, addr);
364:
365: peer = bgp_peer_lookup_next (addr);
366:
367: if (peer == NULL)
368: return NULL;
369:
370: oid_copy_addr (name + v->namelen, addr, sizeof (struct in_addr));
371: *length = sizeof (struct in_addr) + v->namelen;
372:
373: return peer;
374: }
375: return NULL;
376: }
377:
378: /* BGP write methods. */
379: static int
380: write_bgpPeerTable (int action, u_char *var_val,
381: u_char var_val_type, size_t var_val_len,
382: u_char *statP, oid *name, size_t length,
383: struct variable *v)
384: {
385: struct in_addr addr;
386: struct peer *peer;
387: long intval;
388: size_t bigsize = SNMP_MAX_LEN;
389:
390: if (var_val_type != ASN_INTEGER)
391: {
392: return SNMP_ERR_WRONGTYPE;
393: }
394: if (var_val_len != sizeof (long))
395: {
396: return SNMP_ERR_WRONGLENGTH;
397: }
398:
399: if (! asn_parse_int(var_val, &bigsize, &var_val_type,
400: &intval, sizeof(long)))
401: {
402: return SNMP_ERR_WRONGENCODING;
403: }
404:
405: memset (&addr, 0, sizeof (struct in_addr));
406:
407: peer = bgpPeerTable_lookup (v, name, &length, &addr, 1);
408: if (! peer)
409: return SNMP_ERR_NOSUCHNAME;
410:
411: printf ("val: %ld\n", intval);
412:
413: switch (v->magic)
414: {
415: case BGPPEERADMINSTATUS:
416: #define BGP_PeerAdmin_stop 1
417: #define BGP_PeerAdmin_start 2
418: /* When the peer is established, */
419: if (intval == BGP_PeerAdmin_stop)
420: BGP_EVENT_ADD (peer, BGP_Stop);
421: else if (intval == BGP_PeerAdmin_start)
422: ; /* Do nothing. */
423: else
424: return SNMP_ERR_NOSUCHNAME;
425: break;
426: case BGPPEERCONNECTRETRYINTERVAL:
427: SET_FLAG (peer->config, PEER_CONFIG_CONNECT);
428: peer->connect = intval;
429: peer->v_connect = intval;
430: break;
431: case BGPPEERHOLDTIMECONFIGURED:
432: SET_FLAG (peer->config, PEER_CONFIG_TIMER);
433: peer->holdtime = intval;
434: peer->v_holdtime = intval;
435: break;
436: case BGPPEERKEEPALIVECONFIGURED:
437: SET_FLAG (peer->config, PEER_CONFIG_TIMER);
438: peer->keepalive = intval;
439: peer->v_keepalive = intval;
440: break;
441: case BGPPEERMINASORIGINATIONINTERVAL:
442: peer->v_asorig = intval;
443: break;
444: case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
445: peer->v_routeadv = intval;
446: break;
447: }
448: return SNMP_ERR_NOERROR;
449: }
450:
451: static u_char *
452: bgpPeerTable (struct variable *v, oid name[], size_t *length,
453: int exact, size_t *var_len, WriteMethod **write_method)
454: {
455: static struct in_addr addr;
456: struct peer *peer;
457:
458: if (smux_header_table(v, name, length, exact, var_len, write_method)
459: == MATCH_FAILED)
460: return NULL;
461: memset (&addr, 0, sizeof (struct in_addr));
462:
463: peer = bgpPeerTable_lookup (v, name, length, &addr, exact);
464: if (! peer)
465: return NULL;
466:
467: switch (v->magic)
468: {
469: case BGPPEERIDENTIFIER:
470: return SNMP_IPADDRESS (peer->remote_id);
471: break;
472: case BGPPEERSTATE:
473: return SNMP_INTEGER (peer->status);
474: break;
475: case BGPPEERADMINSTATUS:
476: *write_method = write_bgpPeerTable;
477: #define BGP_PeerAdmin_stop 1
478: #define BGP_PeerAdmin_start 2
479: if (CHECK_FLAG (peer->flags, PEER_FLAG_SHUTDOWN))
480: return SNMP_INTEGER (BGP_PeerAdmin_stop);
481: else
482: return SNMP_INTEGER (BGP_PeerAdmin_start);
483: break;
484: case BGPPEERNEGOTIATEDVERSION:
485: return SNMP_INTEGER (BGP_VERSION_4);
486: break;
487: case BGPPEERLOCALADDR:
488: if (peer->su_local)
489: return SNMP_IPADDRESS (peer->su_local->sin.sin_addr);
490: else
491: return SNMP_IPADDRESS (bgp_empty_addr);
492: break;
493: case BGPPEERLOCALPORT:
494: if (peer->su_local)
495: return SNMP_INTEGER (ntohs (peer->su_local->sin.sin_port));
496: else
497: return SNMP_INTEGER (0);
498: break;
499: case BGPPEERREMOTEADDR:
500: if (peer->su_remote)
501: return SNMP_IPADDRESS (peer->su_remote->sin.sin_addr);
502: else
503: return SNMP_IPADDRESS (bgp_empty_addr);
504: break;
505: case BGPPEERREMOTEPORT:
506: if (peer->su_remote)
507: return SNMP_INTEGER (ntohs (peer->su_remote->sin.sin_port));
508: else
509: return SNMP_INTEGER (0);
510: break;
511: case BGPPEERREMOTEAS:
512: return SNMP_INTEGER (peer->as);
513: break;
514: case BGPPEERINUPDATES:
515: return SNMP_INTEGER (peer->update_in);
516: break;
517: case BGPPEEROUTUPDATES:
518: return SNMP_INTEGER (peer->update_out);
519: break;
520: case BGPPEERINTOTALMESSAGES:
521: return SNMP_INTEGER (peer->open_in + peer->update_in
522: + peer->keepalive_in + peer->notify_in
523: + peer->refresh_in + peer->dynamic_cap_in);
524: break;
525: case BGPPEEROUTTOTALMESSAGES:
526: return SNMP_INTEGER (peer->open_out + peer->update_out
527: + peer->keepalive_out + peer->notify_out
528: + peer->refresh_out + peer->dynamic_cap_out);
529: break;
530: case BGPPEERLASTERROR:
531: {
532: static u_char lasterror[2];
533: lasterror[0] = peer->notify.code;
534: lasterror[1] = peer->notify.subcode;
535: *var_len = 2;
536: return (u_char *)&lasterror;
537: }
538: break;
539: case BGPPEERFSMESTABLISHEDTRANSITIONS:
540: return SNMP_INTEGER (peer->established);
541: break;
542: case BGPPEERFSMESTABLISHEDTIME:
543: if (peer->uptime == 0)
544: return SNMP_INTEGER (0);
545: else
546: return SNMP_INTEGER (bgp_clock () - peer->uptime);
547: break;
548: case BGPPEERCONNECTRETRYINTERVAL:
549: *write_method = write_bgpPeerTable;
550: return SNMP_INTEGER (peer->v_connect);
551: break;
552: case BGPPEERHOLDTIME:
553: return SNMP_INTEGER (peer->v_holdtime);
554: break;
555: case BGPPEERKEEPALIVE:
556: return SNMP_INTEGER (peer->v_keepalive);
557: break;
558: case BGPPEERHOLDTIMECONFIGURED:
559: *write_method = write_bgpPeerTable;
560: if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER))
561: return SNMP_INTEGER (peer->holdtime);
562: else
563: return SNMP_INTEGER (peer->v_holdtime);
564: break;
565: case BGPPEERKEEPALIVECONFIGURED:
566: *write_method = write_bgpPeerTable;
567: if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER))
568: return SNMP_INTEGER (peer->keepalive);
569: else
570: return SNMP_INTEGER (peer->v_keepalive);
571: break;
572: case BGPPEERMINASORIGINATIONINTERVAL:
573: *write_method = write_bgpPeerTable;
574: return SNMP_INTEGER (peer->v_asorig);
575: break;
576: case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
577: *write_method = write_bgpPeerTable;
578: return SNMP_INTEGER (peer->v_routeadv);
579: break;
580: case BGPPEERINUPDATEELAPSEDTIME:
581: if (peer->update_time == 0)
582: return SNMP_INTEGER (0);
583: else
584: return SNMP_INTEGER (bgp_clock () - peer->update_time);
585: break;
586: default:
587: return NULL;
588: break;
589: }
590: return NULL;
591: }
592:
593: static u_char *
594: bgpIdentifier (struct variable *v, oid name[], size_t *length,
595: int exact, size_t *var_len, WriteMethod **write_method)
596: {
597: struct bgp *bgp;
598:
599: if (smux_header_generic(v, name, length, exact, var_len, write_method)
600: == MATCH_FAILED)
601: return NULL;
602:
603: bgp = bgp_get_default ();
604: if (!bgp)
605: return NULL;
606:
607: return SNMP_IPADDRESS (bgp->router_id);
608: }
609:
610: static u_char *
611: bgpRcvdPathAttrTable (struct variable *v, oid name[], size_t *length,
612: int exact, size_t *var_len, WriteMethod **write_method)
613: {
614: /* Received Path Attribute Table. This table contains, one entry
615: per path to a network, path attributes received from all peers
616: running BGP version 3 or less. This table is obsolete, having
617: been replaced in functionality with the bgp4PathAttrTable. */
618: return NULL;
619: }
620:
621: static struct bgp_info *
622: bgp4PathAttrLookup (struct variable *v, oid name[], size_t *length,
623: struct bgp *bgp, struct prefix_ipv4 *addr, int exact)
624: {
625: oid *offset;
626: int offsetlen;
627: struct bgp_info *binfo;
628: struct bgp_info *min;
629: struct bgp_node *rn;
630: union sockunion su;
631: unsigned int len;
632: struct in_addr paddr;
633:
634: #define BGP_PATHATTR_ENTRY_OFFSET \
635: (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE)
636:
637: if (exact)
638: {
639: if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET)
640: return NULL;
641:
642: /* Set OID offset for prefix. */
643: offset = name + v->namelen;
644: oid2in_addr (offset, IN_ADDR_SIZE, &addr->prefix);
645: offset += IN_ADDR_SIZE;
646:
647: /* Prefix length. */
648: addr->prefixlen = *offset;
649: offset++;
650:
651: /* Peer address. */
652: su.sin.sin_family = AF_INET;
653: oid2in_addr (offset, IN_ADDR_SIZE, &su.sin.sin_addr);
654:
655: /* Lookup node. */
656: rn = bgp_node_lookup (bgp->rib[AFI_IP][SAFI_UNICAST],
657: (struct prefix *) addr);
658: if (rn)
659: {
660: bgp_unlock_node (rn);
661:
662: for (binfo = rn->info; binfo; binfo = binfo->next)
663: if (sockunion_same (&binfo->peer->su, &su))
664: return binfo;
665: }
666: }
667: else
668: {
669: offset = name + v->namelen;
670: offsetlen = *length - v->namelen;
671: len = offsetlen;
672:
673: if (offsetlen == 0)
674: rn = bgp_table_top (bgp->rib[AFI_IP][SAFI_UNICAST]);
675: else
676: {
677: if (len > IN_ADDR_SIZE)
678: len = IN_ADDR_SIZE;
679:
680: oid2in_addr (offset, len, &addr->prefix);
681:
682: offset += IN_ADDR_SIZE;
683: offsetlen -= IN_ADDR_SIZE;
684:
685: if (offsetlen > 0)
686: addr->prefixlen = *offset;
687: else
688: addr->prefixlen = len * 8;
689:
690: rn = bgp_node_get (bgp->rib[AFI_IP][SAFI_UNICAST],
691: (struct prefix *) addr);
692:
693: offset++;
694: offsetlen--;
695: }
696:
697: if (offsetlen > 0)
698: {
699: len = offsetlen;
700: if (len > IN_ADDR_SIZE)
701: len = IN_ADDR_SIZE;
702:
703: oid2in_addr (offset, len, &paddr);
704: }
705: else
706: paddr.s_addr = 0;
707:
708: if (! rn)
709: return NULL;
710:
711: do
712: {
713: min = NULL;
714:
715: for (binfo = rn->info; binfo; binfo = binfo->next)
716: {
717: if (binfo->peer->su.sin.sin_family == AF_INET
718: && ntohl (paddr.s_addr)
719: < ntohl (binfo->peer->su.sin.sin_addr.s_addr))
720: {
721: if (min)
722: {
723: if (ntohl (binfo->peer->su.sin.sin_addr.s_addr)
724: < ntohl (min->peer->su.sin.sin_addr.s_addr))
725: min = binfo;
726: }
727: else
728: min = binfo;
729: }
730: }
731:
732: if (min)
733: {
734: *length = v->namelen + BGP_PATHATTR_ENTRY_OFFSET;
735:
736: offset = name + v->namelen;
737: oid_copy_addr (offset, &rn->p.u.prefix4, IN_ADDR_SIZE);
738: offset += IN_ADDR_SIZE;
739: *offset = rn->p.prefixlen;
740: offset++;
741: oid_copy_addr (offset, &min->peer->su.sin.sin_addr,
742: IN_ADDR_SIZE);
743: addr->prefix = rn->p.u.prefix4;
744: addr->prefixlen = rn->p.prefixlen;
745:
746: bgp_unlock_node (rn);
747:
748: return min;
749: }
750:
751: paddr.s_addr = 0;
752: }
753: while ((rn = bgp_route_next (rn)) != NULL);
754: }
755: return NULL;
756: }
757:
758: static u_char *
759: bgp4PathAttrTable (struct variable *v, oid name[], size_t *length,
760: int exact, size_t *var_len, WriteMethod **write_method)
761: {
762: struct bgp *bgp;
763: struct bgp_info *binfo;
764: struct prefix_ipv4 addr;
765:
766: bgp = bgp_get_default ();
767: if (! bgp)
768: return NULL;
769:
770: if (smux_header_table(v, name, length, exact, var_len, write_method)
771: == MATCH_FAILED)
772: return NULL;
773: memset (&addr, 0, sizeof (struct prefix_ipv4));
774:
775: binfo = bgp4PathAttrLookup (v, name, length, bgp, &addr, exact);
776: if (! binfo)
777: return NULL;
778:
779: switch (v->magic)
780: {
781: case BGP4PATHATTRPEER: /* 1 */
782: return SNMP_IPADDRESS (binfo->peer->su.sin.sin_addr);
783: break;
784: case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */
785: return SNMP_INTEGER (addr.prefixlen);
786: break;
787: case BGP4PATHATTRIPADDRPREFIX: /* 3 */
788: return SNMP_IPADDRESS (addr.prefix);
789: break;
790: case BGP4PATHATTRORIGIN: /* 4 */
791: return SNMP_INTEGER (binfo->attr->origin);
792: break;
793: case BGP4PATHATTRASPATHSEGMENT: /* 5 */
794: return aspath_snmp_pathseg (binfo->attr->aspath, var_len);
795: break;
796: case BGP4PATHATTRNEXTHOP: /* 6 */
797: return SNMP_IPADDRESS (binfo->attr->nexthop);
798: break;
799: case BGP4PATHATTRMULTIEXITDISC: /* 7 */
800: return SNMP_INTEGER (binfo->attr->med);
801: break;
802: case BGP4PATHATTRLOCALPREF: /* 8 */
803: return SNMP_INTEGER (binfo->attr->local_pref);
804: break;
805: case BGP4PATHATTRATOMICAGGREGATE: /* 9 */
806: return SNMP_INTEGER (1);
807: break;
808: case BGP4PATHATTRAGGREGATORAS: /* 10 */
809: if (binfo->attr->extra)
810: return SNMP_INTEGER (binfo->attr->extra->aggregator_as);
811: else
812: return SNMP_INTEGER (0);
813: break;
814: case BGP4PATHATTRAGGREGATORADDR: /* 11 */
815: if (binfo->attr->extra)
816: return SNMP_IPADDRESS (binfo->attr->extra->aggregator_addr);
817: else
818: return SNMP_INTEGER (0);
819: break;
820: case BGP4PATHATTRCALCLOCALPREF: /* 12 */
821: return SNMP_INTEGER (-1);
822: break;
823: case BGP4PATHATTRBEST: /* 13 */
824: #define BGP4_PathAttrBest_false 1
825: #define BGP4_PathAttrBest_true 2
826: if (CHECK_FLAG (binfo->flags, BGP_INFO_SELECTED))
827: return SNMP_INTEGER (BGP4_PathAttrBest_true);
828: else
829: return SNMP_INTEGER (BGP4_PathAttrBest_false);
830: break;
831: case BGP4PATHATTRUNKNOWN: /* 14 */
832: *var_len = 0;
833: return NULL;
834: break;
835: }
836: return NULL;
837: }
838:
839: /* BGP Traps. */
840: struct trap_object bgpTrapList[] =
841: {
842: {3, {3, 1, BGPPEERLASTERROR}},
843: {3, {3, 1, BGPPEERSTATE}}
844: };
845:
846: void
847: bgpTrapEstablished (struct peer *peer)
848: {
849: int ret;
850: struct in_addr addr;
851: oid index[sizeof (oid) * IN_ADDR_SIZE];
852:
853: ret = inet_aton (peer->host, &addr);
854: if (ret == 0)
855: return;
856:
857: oid_copy_addr (index, &addr, IN_ADDR_SIZE);
858:
859: smux_trap (bgp_variables, sizeof bgp_variables / sizeof (struct variable),
860: bgp_trap_oid, sizeof bgp_trap_oid / sizeof (oid),
861: bgp_oid, sizeof bgp_oid / sizeof (oid),
862: index, IN_ADDR_SIZE,
863: bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object),
864: BGPESTABLISHED);
865: }
866:
867: void
868: bgpTrapBackwardTransition (struct peer *peer)
869: {
870: int ret;
871: struct in_addr addr;
872: oid index[sizeof (oid) * IN_ADDR_SIZE];
873:
874: ret = inet_aton (peer->host, &addr);
875: if (ret == 0)
876: return;
877:
878: oid_copy_addr (index, &addr, IN_ADDR_SIZE);
879:
880: smux_trap (bgp_variables, sizeof bgp_variables / sizeof (struct variable),
881: bgp_trap_oid, sizeof bgp_trap_oid / sizeof (oid),
882: bgp_oid, sizeof bgp_oid / sizeof (oid),
883: index, IN_ADDR_SIZE,
884: bgpTrapList, sizeof bgpTrapList / sizeof (struct trap_object),
885: BGPBACKWARDTRANSITION);
886: }
887:
888: void
889: bgp_snmp_init (void)
890: {
891: smux_init (bm->master);
892: REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid);
893: }
894: #endif /* HAVE_SNMP */
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