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718e3744 | 1 | /* BGP4 SNMP support |
896014f4 DL |
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 along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
07661cb5 | 23 | #include <net-snmp/net-snmp-config.h> |
fb62a3ce | 24 | #include <net-snmp/net-snmp-includes.h> |
718e3744 | 25 | |
26 | #include "if.h" | |
27 | #include "log.h" | |
28 | #include "prefix.h" | |
29 | #include "command.h" | |
30 | #include "thread.h" | |
31 | #include "smux.h" | |
039f3a34 | 32 | #include "filter.h" |
5986b66b DL |
33 | #include "hook.h" |
34 | #include "libfrr.h" | |
35 | #include "version.h" | |
718e3744 | 36 | |
37 | #include "bgpd/bgpd.h" | |
38 | #include "bgpd/bgp_table.h" | |
39 | #include "bgpd/bgp_aspath.h" | |
40 | #include "bgpd/bgp_attr.h" | |
41 | #include "bgpd/bgp_route.h" | |
42 | #include "bgpd/bgp_fsm.h" | |
6b0655a2 | 43 | |
718e3744 | 44 | /* BGP4-MIB described in RFC1657. */ |
45 | #define BGP4MIB 1,3,6,1,2,1,15 | |
46 | ||
020709f9 | 47 | /* BGP TRAP. */ |
48 | #define BGPESTABLISHED 1 | |
49 | #define BGPBACKWARDTRANSITION 2 | |
50 | ||
718e3744 | 51 | /* BGP MIB bgpVersion. */ |
52 | #define BGPVERSION 0 | |
53 | ||
54 | /* BGP MIB bgpLocalAs. */ | |
55 | #define BGPLOCALAS 0 | |
56 | ||
57 | /* BGP MIB bgpPeerTable. */ | |
58 | #define BGPPEERIDENTIFIER 1 | |
59 | #define BGPPEERSTATE 2 | |
60 | #define BGPPEERADMINSTATUS 3 | |
61 | #define BGPPEERNEGOTIATEDVERSION 4 | |
62 | #define BGPPEERLOCALADDR 5 | |
63 | #define BGPPEERLOCALPORT 6 | |
64 | #define BGPPEERREMOTEADDR 7 | |
65 | #define BGPPEERREMOTEPORT 8 | |
66 | #define BGPPEERREMOTEAS 9 | |
67 | #define BGPPEERINUPDATES 10 | |
68 | #define BGPPEEROUTUPDATES 11 | |
69 | #define BGPPEERINTOTALMESSAGES 12 | |
70 | #define BGPPEEROUTTOTALMESSAGES 13 | |
71 | #define BGPPEERLASTERROR 14 | |
72 | #define BGPPEERFSMESTABLISHEDTRANSITIONS 15 | |
73 | #define BGPPEERFSMESTABLISHEDTIME 16 | |
74 | #define BGPPEERCONNECTRETRYINTERVAL 17 | |
75 | #define BGPPEERHOLDTIME 18 | |
76 | #define BGPPEERKEEPALIVE 19 | |
77 | #define BGPPEERHOLDTIMECONFIGURED 20 | |
78 | #define BGPPEERKEEPALIVECONFIGURED 21 | |
bd4b893f DW |
79 | #define BGPPEERMINROUTEADVERTISEMENTINTERVAL 22 |
80 | #define BGPPEERINUPDATEELAPSEDTIME 23 | |
718e3744 | 81 | |
82 | /* BGP MIB bgpIdentifier. */ | |
83 | #define BGPIDENTIFIER 0 | |
84 | ||
85 | /* BGP MIB bgpRcvdPathAttrTable */ | |
86 | #define BGPPATHATTRPEER 1 | |
87 | #define BGPPATHATTRDESTNETWORK 2 | |
88 | #define BGPPATHATTRORIGIN 3 | |
89 | #define BGPPATHATTRASPATH 4 | |
90 | #define BGPPATHATTRNEXTHOP 5 | |
91 | #define BGPPATHATTRINTERASMETRIC 6 | |
92 | ||
93 | /* BGP MIB bgp4PathAttrTable. */ | |
94 | #define BGP4PATHATTRPEER 1 | |
95 | #define BGP4PATHATTRIPADDRPREFIXLEN 2 | |
96 | #define BGP4PATHATTRIPADDRPREFIX 3 | |
97 | #define BGP4PATHATTRORIGIN 4 | |
98 | #define BGP4PATHATTRASPATHSEGMENT 5 | |
99 | #define BGP4PATHATTRNEXTHOP 6 | |
100 | #define BGP4PATHATTRMULTIEXITDISC 7 | |
101 | #define BGP4PATHATTRLOCALPREF 8 | |
102 | #define BGP4PATHATTRATOMICAGGREGATE 9 | |
103 | #define BGP4PATHATTRAGGREGATORAS 10 | |
104 | #define BGP4PATHATTRAGGREGATORADDR 11 | |
105 | #define BGP4PATHATTRCALCLOCALPREF 12 | |
106 | #define BGP4PATHATTRBEST 13 | |
107 | #define BGP4PATHATTRUNKNOWN 14 | |
108 | ||
109 | /* SNMP value hack. */ | |
110 | #define INTEGER ASN_INTEGER | |
111 | #define INTEGER32 ASN_INTEGER | |
112 | #define COUNTER32 ASN_COUNTER | |
113 | #define OCTET_STRING ASN_OCTET_STR | |
114 | #define IPADDRESS ASN_IPADDRESS | |
115 | #define GAUGE32 ASN_UNSIGNED | |
6b0655a2 | 116 | |
718e3744 | 117 | /* Declare static local variables for convenience. */ |
118 | SNMP_LOCAL_VARIABLES | |
119 | ||
120 | /* BGP-MIB instances. */ | |
d62a17ae | 121 | static oid bgp_oid[] = {BGP4MIB}; |
122 | static oid bgp_trap_oid[] = {BGP4MIB, 0}; | |
718e3744 | 123 | |
124 | /* IP address 0.0.0.0. */ | |
d62a17ae | 125 | static struct in_addr bgp_empty_addr = {.s_addr = 0}; |
718e3744 | 126 | |
127 | /* Hook functions. */ | |
d62a17ae | 128 | static u_char *bgpVersion(struct variable *, oid[], size_t *, int, size_t *, |
129 | WriteMethod **); | |
130 | static u_char *bgpLocalAs(struct variable *, oid[], size_t *, int, size_t *, | |
131 | WriteMethod **); | |
132 | static u_char *bgpPeerTable(struct variable *, oid[], size_t *, int, size_t *, | |
133 | WriteMethod **); | |
134 | static u_char *bgpRcvdPathAttrTable(struct variable *, oid[], size_t *, int, | |
135 | size_t *, WriteMethod **); | |
136 | static u_char *bgpIdentifier(struct variable *, oid[], size_t *, int, size_t *, | |
137 | WriteMethod **); | |
138 | static u_char *bgp4PathAttrTable(struct variable *, oid[], size_t *, int, | |
139 | size_t *, WriteMethod **); | |
718e3744 | 140 | /* static u_char *bgpTraps (); */ |
141 | ||
d62a17ae | 142 | static struct variable bgp_variables[] = { |
143 | /* BGP version. */ | |
144 | {BGPVERSION, OCTET_STRING, RONLY, bgpVersion, 1, {1}}, | |
145 | /* BGP local AS. */ | |
146 | {BGPLOCALAS, INTEGER, RONLY, bgpLocalAs, 1, {2}}, | |
147 | /* BGP peer table. */ | |
148 | {BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 1}}, | |
149 | {BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 2}}, | |
150 | {BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable, 3, {3, 1, 3}}, | |
151 | {BGPPEERNEGOTIATEDVERSION, | |
152 | INTEGER32, | |
153 | RONLY, | |
154 | bgpPeerTable, | |
155 | 3, | |
156 | {3, 1, 4}}, | |
157 | {BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 5}}, | |
158 | {BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 6}}, | |
159 | {BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 7}}, | |
160 | {BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 8}}, | |
161 | {BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 9}}, | |
162 | {BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 10}}, | |
163 | {BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 11}}, | |
164 | {BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 12}}, | |
165 | {BGPPEEROUTTOTALMESSAGES, | |
166 | COUNTER32, | |
167 | RONLY, | |
168 | bgpPeerTable, | |
169 | 3, | |
170 | {3, 1, 13}}, | |
171 | {BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable, 3, {3, 1, 14}}, | |
172 | {BGPPEERFSMESTABLISHEDTRANSITIONS, | |
173 | COUNTER32, | |
174 | RONLY, | |
175 | bgpPeerTable, | |
176 | 3, | |
177 | {3, 1, 15}}, | |
178 | {BGPPEERFSMESTABLISHEDTIME, | |
179 | GAUGE32, | |
180 | RONLY, | |
181 | bgpPeerTable, | |
182 | 3, | |
183 | {3, 1, 16}}, | |
184 | {BGPPEERCONNECTRETRYINTERVAL, | |
185 | INTEGER, | |
186 | RWRITE, | |
187 | bgpPeerTable, | |
188 | 3, | |
189 | {3, 1, 17}}, | |
190 | {BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 18}}, | |
191 | {BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 19}}, | |
192 | {BGPPEERHOLDTIMECONFIGURED, | |
193 | INTEGER, | |
194 | RWRITE, | |
195 | bgpPeerTable, | |
196 | 3, | |
197 | {3, 1, 20}}, | |
198 | {BGPPEERKEEPALIVECONFIGURED, | |
199 | INTEGER, | |
200 | RWRITE, | |
201 | bgpPeerTable, | |
202 | 3, | |
203 | {3, 1, 21}}, | |
204 | {BGPPEERMINROUTEADVERTISEMENTINTERVAL, | |
205 | INTEGER, | |
206 | RWRITE, | |
207 | bgpPeerTable, | |
208 | 3, | |
209 | {3, 1, 23}}, | |
210 | {BGPPEERINUPDATEELAPSEDTIME, | |
211 | GAUGE32, | |
212 | RONLY, | |
213 | bgpPeerTable, | |
214 | 3, | |
215 | {3, 1, 24}}, | |
216 | /* BGP identifier. */ | |
217 | {BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier, 1, {4}}, | |
218 | /* BGP received path attribute table. */ | |
219 | {BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 1}}, | |
220 | {BGPPATHATTRDESTNETWORK, | |
221 | IPADDRESS, | |
222 | RONLY, | |
223 | bgpRcvdPathAttrTable, | |
224 | 3, | |
225 | {5, 1, 2}}, | |
226 | {BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 3}}, | |
227 | {BGPPATHATTRASPATH, | |
228 | OCTET_STRING, | |
229 | RONLY, | |
230 | bgpRcvdPathAttrTable, | |
231 | 3, | |
232 | {5, 1, 4}}, | |
233 | {BGPPATHATTRNEXTHOP, | |
234 | IPADDRESS, | |
235 | RONLY, | |
236 | bgpRcvdPathAttrTable, | |
237 | 3, | |
238 | {5, 1, 5}}, | |
239 | {BGPPATHATTRINTERASMETRIC, | |
240 | INTEGER32, | |
241 | RONLY, | |
242 | bgpRcvdPathAttrTable, | |
243 | 3, | |
244 | {5, 1, 6}}, | |
245 | /* BGP-4 received path attribute table. */ | |
246 | {BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable, 3, {6, 1, 1}}, | |
247 | {BGP4PATHATTRIPADDRPREFIXLEN, | |
248 | INTEGER, | |
249 | RONLY, | |
250 | bgp4PathAttrTable, | |
251 | 3, | |
252 | {6, 1, 2}}, | |
253 | {BGP4PATHATTRIPADDRPREFIX, | |
254 | IPADDRESS, | |
255 | RONLY, | |
256 | bgp4PathAttrTable, | |
257 | 3, | |
258 | {6, 1, 3}}, | |
259 | {BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 4}}, | |
260 | {BGP4PATHATTRASPATHSEGMENT, | |
261 | OCTET_STRING, | |
262 | RONLY, | |
263 | bgp4PathAttrTable, | |
264 | 3, | |
265 | {6, 1, 5}}, | |
266 | {BGP4PATHATTRNEXTHOP, | |
267 | IPADDRESS, | |
268 | RONLY, | |
269 | bgp4PathAttrTable, | |
270 | 3, | |
271 | {6, 1, 6}}, | |
272 | {BGP4PATHATTRMULTIEXITDISC, | |
273 | INTEGER, | |
274 | RONLY, | |
275 | bgp4PathAttrTable, | |
276 | 3, | |
277 | {6, 1, 7}}, | |
278 | {BGP4PATHATTRLOCALPREF, | |
279 | INTEGER, | |
280 | RONLY, | |
281 | bgp4PathAttrTable, | |
282 | 3, | |
283 | {6, 1, 8}}, | |
284 | {BGP4PATHATTRATOMICAGGREGATE, | |
285 | INTEGER, | |
286 | RONLY, | |
287 | bgp4PathAttrTable, | |
288 | 3, | |
289 | {6, 1, 9}}, | |
290 | {BGP4PATHATTRAGGREGATORAS, | |
291 | INTEGER, | |
292 | RONLY, | |
293 | bgp4PathAttrTable, | |
294 | 3, | |
295 | {6, 1, 10}}, | |
296 | {BGP4PATHATTRAGGREGATORADDR, | |
297 | IPADDRESS, | |
298 | RONLY, | |
299 | bgp4PathAttrTable, | |
300 | 3, | |
301 | {6, 1, 11}}, | |
302 | {BGP4PATHATTRCALCLOCALPREF, | |
303 | INTEGER, | |
304 | RONLY, | |
305 | bgp4PathAttrTable, | |
306 | 3, | |
307 | {6, 1, 12}}, | |
308 | {BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 13}}, | |
309 | {BGP4PATHATTRUNKNOWN, | |
310 | OCTET_STRING, | |
311 | RONLY, | |
312 | bgp4PathAttrTable, | |
313 | 3, | |
314 | {6, 1, 14}}, | |
718e3744 | 315 | }; |
dd488a78 | 316 | |
6b0655a2 | 317 | |
d62a17ae | 318 | static u_char *bgpVersion(struct variable *v, oid name[], size_t *length, |
319 | int exact, size_t *var_len, | |
320 | WriteMethod **write_method) | |
718e3744 | 321 | { |
d62a17ae | 322 | static u_char version; |
718e3744 | 323 | |
d62a17ae | 324 | if (smux_header_generic(v, name, length, exact, var_len, write_method) |
325 | == MATCH_FAILED) | |
326 | return NULL; | |
718e3744 | 327 | |
d62a17ae | 328 | /* Retrun BGP version. Zebra bgpd only support version 4. */ |
329 | version = (0x80 >> (BGP_VERSION_4 - 1)); | |
718e3744 | 330 | |
d62a17ae | 331 | /* Return octet string length 1. */ |
332 | *var_len = 1; | |
333 | return (u_char *)&version; | |
718e3744 | 334 | } |
335 | ||
d62a17ae | 336 | static u_char *bgpLocalAs(struct variable *v, oid name[], size_t *length, |
337 | int exact, size_t *var_len, | |
338 | WriteMethod **write_method) | |
718e3744 | 339 | { |
d62a17ae | 340 | struct bgp *bgp; |
718e3744 | 341 | |
d62a17ae | 342 | if (smux_header_generic(v, name, length, exact, var_len, write_method) |
343 | == MATCH_FAILED) | |
344 | return NULL; | |
718e3744 | 345 | |
d62a17ae | 346 | /* Get BGP structure. */ |
347 | bgp = bgp_get_default(); | |
348 | if (!bgp) | |
349 | return NULL; | |
718e3744 | 350 | |
d62a17ae | 351 | return SNMP_INTEGER(bgp->as); |
718e3744 | 352 | } |
353 | ||
d62a17ae | 354 | static struct peer *peer_lookup_addr_ipv4(struct in_addr *src) |
718e3744 | 355 | { |
d62a17ae | 356 | struct bgp *bgp; |
357 | struct peer *peer; | |
358 | struct listnode *node; | |
359 | struct in_addr addr; | |
360 | int ret; | |
361 | ||
362 | bgp = bgp_get_default(); | |
363 | if (!bgp) | |
364 | return NULL; | |
365 | ||
366 | for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) { | |
367 | ret = inet_pton(AF_INET, peer->host, &addr); | |
368 | if (ret > 0) { | |
369 | if (IPV4_ADDR_SAME(&addr, src)) | |
370 | return peer; | |
371 | } | |
718e3744 | 372 | } |
d62a17ae | 373 | return NULL; |
718e3744 | 374 | } |
375 | ||
d62a17ae | 376 | static struct peer *bgp_peer_lookup_next(struct in_addr *src) |
718e3744 | 377 | { |
d62a17ae | 378 | struct bgp *bgp; |
379 | struct peer *peer; | |
380 | struct listnode *node; | |
381 | struct in_addr *p; | |
382 | union sockunion su; | |
383 | int ret; | |
384 | ||
385 | sockunion_init(&su); | |
386 | ||
387 | bgp = bgp_get_default(); | |
388 | if (!bgp) | |
389 | return NULL; | |
390 | ||
391 | for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) { | |
392 | ret = inet_pton(AF_INET, peer->host, &su.sin.sin_addr); | |
393 | if (ret > 0) { | |
394 | p = &su.sin.sin_addr; | |
395 | ||
396 | if (ntohl(p->s_addr) > ntohl(src->s_addr)) { | |
397 | src->s_addr = p->s_addr; | |
398 | return peer; | |
399 | } | |
400 | } | |
718e3744 | 401 | } |
d62a17ae | 402 | return NULL; |
718e3744 | 403 | } |
404 | ||
9a8382f1 DL |
405 | /* 1.3.6.1.2.1.15.3.1.x = 10 */ |
406 | #define PEERTAB_NAMELEN 10 | |
407 | ||
d62a17ae | 408 | static struct peer *bgpPeerTable_lookup(struct variable *v, oid name[], |
409 | size_t *length, struct in_addr *addr, | |
410 | int exact) | |
718e3744 | 411 | { |
d62a17ae | 412 | struct peer *peer = NULL; |
413 | size_t namelen = v ? v->namelen : PEERTAB_NAMELEN; | |
414 | int len; | |
718e3744 | 415 | |
d62a17ae | 416 | if (exact) { |
417 | /* Check the length. */ | |
418 | if (*length - namelen != sizeof(struct in_addr)) | |
419 | return NULL; | |
420 | ||
421 | oid2in_addr(name + namelen, IN_ADDR_SIZE, addr); | |
422 | ||
423 | peer = peer_lookup_addr_ipv4(addr); | |
424 | return peer; | |
425 | } else { | |
426 | len = *length - namelen; | |
427 | if (len > 4) | |
428 | len = 4; | |
718e3744 | 429 | |
d62a17ae | 430 | oid2in_addr(name + namelen, len, addr); |
718e3744 | 431 | |
d62a17ae | 432 | peer = bgp_peer_lookup_next(addr); |
433 | ||
434 | if (peer == NULL) | |
435 | return NULL; | |
436 | ||
437 | oid_copy_addr(name + namelen, addr, sizeof(struct in_addr)); | |
438 | *length = sizeof(struct in_addr) + namelen; | |
439 | ||
440 | return peer; | |
441 | } | |
442 | return NULL; | |
718e3744 | 443 | } |
444 | ||
445 | /* BGP write methods. */ | |
d62a17ae | 446 | static int write_bgpPeerTable(int action, u_char *var_val, u_char var_val_type, |
447 | size_t var_val_len, u_char *statP, oid *name, | |
448 | size_t length) | |
718e3744 | 449 | { |
d62a17ae | 450 | struct in_addr addr; |
451 | struct peer *peer; | |
452 | long intval; | |
9a8382f1 | 453 | |
d62a17ae | 454 | if (var_val_type != ASN_INTEGER) { |
455 | return SNMP_ERR_WRONGTYPE; | |
456 | } | |
457 | if (var_val_len != sizeof(long)) { | |
458 | return SNMP_ERR_WRONGLENGTH; | |
459 | } | |
718e3744 | 460 | |
d62a17ae | 461 | intval = *(long *)var_val; |
718e3744 | 462 | |
d62a17ae | 463 | memset(&addr, 0, sizeof(struct in_addr)); |
718e3744 | 464 | |
d62a17ae | 465 | peer = bgpPeerTable_lookup(NULL, name, &length, &addr, 1); |
466 | if (!peer) | |
467 | return SNMP_ERR_NOSUCHNAME; | |
718e3744 | 468 | |
d62a17ae | 469 | if (action != SNMP_MSG_INTERNAL_SET_COMMIT) |
470 | return SNMP_ERR_NOERROR; | |
9a8382f1 | 471 | |
d62a17ae | 472 | zlog_info("%s: SNMP write .%ld = %ld", peer->host, |
473 | (long)name[PEERTAB_NAMELEN - 1], intval); | |
718e3744 | 474 | |
d62a17ae | 475 | switch (name[PEERTAB_NAMELEN - 1]) { |
476 | case BGPPEERADMINSTATUS: | |
718e3744 | 477 | #define BGP_PeerAdmin_stop 1 |
478 | #define BGP_PeerAdmin_start 2 | |
d62a17ae | 479 | /* When the peer is established, */ |
480 | if (intval == BGP_PeerAdmin_stop) | |
481 | BGP_EVENT_ADD(peer, BGP_Stop); | |
482 | else if (intval == BGP_PeerAdmin_start) | |
483 | ; /* Do nothing. */ | |
484 | else | |
485 | return SNMP_ERR_NOSUCHNAME; | |
486 | break; | |
487 | case BGPPEERCONNECTRETRYINTERVAL: | |
488 | SET_FLAG(peer->config, PEER_CONFIG_CONNECT); | |
489 | peer->connect = intval; | |
490 | peer->v_connect = intval; | |
491 | break; | |
492 | case BGPPEERHOLDTIMECONFIGURED: | |
493 | SET_FLAG(peer->config, PEER_CONFIG_TIMER); | |
494 | peer->holdtime = intval; | |
495 | peer->v_holdtime = intval; | |
496 | break; | |
497 | case BGPPEERKEEPALIVECONFIGURED: | |
498 | SET_FLAG(peer->config, PEER_CONFIG_TIMER); | |
499 | peer->keepalive = intval; | |
500 | peer->v_keepalive = intval; | |
501 | break; | |
502 | case BGPPEERMINROUTEADVERTISEMENTINTERVAL: | |
503 | peer->v_routeadv = intval; | |
504 | break; | |
505 | } | |
506 | return SNMP_ERR_NOERROR; | |
718e3744 | 507 | } |
508 | ||
d62a17ae | 509 | static u_char *bgpPeerTable(struct variable *v, oid name[], size_t *length, |
510 | int exact, size_t *var_len, | |
511 | WriteMethod **write_method) | |
718e3744 | 512 | { |
d62a17ae | 513 | static struct in_addr addr; |
514 | struct peer *peer; | |
0112e9e0 | 515 | uint32_t ui, uo; |
d62a17ae | 516 | |
517 | if (smux_header_table(v, name, length, exact, var_len, write_method) | |
518 | == MATCH_FAILED) | |
519 | return NULL; | |
520 | memset(&addr, 0, sizeof(struct in_addr)); | |
521 | ||
522 | peer = bgpPeerTable_lookup(v, name, length, &addr, exact); | |
523 | if (!peer) | |
524 | return NULL; | |
525 | ||
526 | switch (v->magic) { | |
527 | case BGPPEERIDENTIFIER: | |
528 | return SNMP_IPADDRESS(peer->remote_id); | |
529 | break; | |
530 | case BGPPEERSTATE: | |
531 | return SNMP_INTEGER(peer->status); | |
532 | break; | |
533 | case BGPPEERADMINSTATUS: | |
534 | *write_method = write_bgpPeerTable; | |
718e3744 | 535 | #define BGP_PeerAdmin_stop 1 |
536 | #define BGP_PeerAdmin_start 2 | |
d62a17ae | 537 | if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)) |
538 | return SNMP_INTEGER(BGP_PeerAdmin_stop); | |
539 | else | |
540 | return SNMP_INTEGER(BGP_PeerAdmin_start); | |
541 | break; | |
542 | case BGPPEERNEGOTIATEDVERSION: | |
543 | return SNMP_INTEGER(BGP_VERSION_4); | |
544 | break; | |
545 | case BGPPEERLOCALADDR: | |
546 | if (peer->su_local) | |
547 | return SNMP_IPADDRESS(peer->su_local->sin.sin_addr); | |
548 | else | |
549 | return SNMP_IPADDRESS(bgp_empty_addr); | |
550 | break; | |
551 | case BGPPEERLOCALPORT: | |
552 | if (peer->su_local) | |
553 | return SNMP_INTEGER( | |
554 | ntohs(peer->su_local->sin.sin_port)); | |
555 | else | |
556 | return SNMP_INTEGER(0); | |
557 | break; | |
558 | case BGPPEERREMOTEADDR: | |
559 | if (peer->su_remote) | |
560 | return SNMP_IPADDRESS(peer->su_remote->sin.sin_addr); | |
561 | else | |
562 | return SNMP_IPADDRESS(bgp_empty_addr); | |
563 | break; | |
564 | case BGPPEERREMOTEPORT: | |
565 | if (peer->su_remote) | |
566 | return SNMP_INTEGER( | |
567 | ntohs(peer->su_remote->sin.sin_port)); | |
568 | else | |
569 | return SNMP_INTEGER(0); | |
570 | break; | |
571 | case BGPPEERREMOTEAS: | |
572 | return SNMP_INTEGER(peer->as); | |
573 | break; | |
574 | case BGPPEERINUPDATES: | |
0112e9e0 QY |
575 | ui = atomic_load_explicit(&peer->update_in, |
576 | memory_order_relaxed); | |
577 | return SNMP_INTEGER(ui); | |
d62a17ae | 578 | break; |
579 | case BGPPEEROUTUPDATES: | |
0112e9e0 QY |
580 | uo = atomic_load_explicit(&peer->update_out, |
581 | memory_order_relaxed); | |
582 | return SNMP_INTEGER(uo); | |
d62a17ae | 583 | break; |
584 | case BGPPEERINTOTALMESSAGES: | |
0112e9e0 | 585 | return SNMP_INTEGER(PEER_TOTAL_RX(peer)); |
d62a17ae | 586 | break; |
587 | case BGPPEEROUTTOTALMESSAGES: | |
0112e9e0 | 588 | return SNMP_INTEGER(PEER_TOTAL_TX(peer)); |
d62a17ae | 589 | break; |
590 | case BGPPEERLASTERROR: { | |
591 | static u_char lasterror[2]; | |
592 | lasterror[0] = peer->notify.code; | |
593 | lasterror[1] = peer->notify.subcode; | |
594 | *var_len = 2; | |
595 | return (u_char *)&lasterror; | |
596 | } break; | |
597 | case BGPPEERFSMESTABLISHEDTRANSITIONS: | |
598 | return SNMP_INTEGER(peer->established); | |
599 | break; | |
600 | case BGPPEERFSMESTABLISHEDTIME: | |
601 | if (peer->uptime == 0) | |
602 | return SNMP_INTEGER(0); | |
603 | else | |
604 | return SNMP_INTEGER(bgp_clock() - peer->uptime); | |
605 | break; | |
606 | case BGPPEERCONNECTRETRYINTERVAL: | |
607 | *write_method = write_bgpPeerTable; | |
608 | return SNMP_INTEGER(peer->v_connect); | |
609 | break; | |
610 | case BGPPEERHOLDTIME: | |
611 | return SNMP_INTEGER(peer->v_holdtime); | |
612 | break; | |
613 | case BGPPEERKEEPALIVE: | |
614 | return SNMP_INTEGER(peer->v_keepalive); | |
615 | break; | |
616 | case BGPPEERHOLDTIMECONFIGURED: | |
617 | *write_method = write_bgpPeerTable; | |
d25e4efc | 618 | if (PEER_OR_GROUP_TIMER_SET(peer)) |
d62a17ae | 619 | return SNMP_INTEGER(peer->holdtime); |
620 | else | |
621 | return SNMP_INTEGER(peer->v_holdtime); | |
622 | break; | |
623 | case BGPPEERKEEPALIVECONFIGURED: | |
624 | *write_method = write_bgpPeerTable; | |
d25e4efc | 625 | if (PEER_OR_GROUP_TIMER_SET(peer)) |
d62a17ae | 626 | return SNMP_INTEGER(peer->keepalive); |
627 | else | |
628 | return SNMP_INTEGER(peer->v_keepalive); | |
629 | break; | |
630 | case BGPPEERMINROUTEADVERTISEMENTINTERVAL: | |
631 | *write_method = write_bgpPeerTable; | |
632 | return SNMP_INTEGER(peer->v_routeadv); | |
633 | break; | |
634 | case BGPPEERINUPDATEELAPSEDTIME: | |
635 | if (peer->update_time == 0) | |
636 | return SNMP_INTEGER(0); | |
637 | else | |
638 | return SNMP_INTEGER(bgp_clock() - peer->update_time); | |
639 | break; | |
640 | default: | |
641 | return NULL; | |
642 | break; | |
643 | } | |
644 | return NULL; | |
718e3744 | 645 | } |
646 | ||
d62a17ae | 647 | static u_char *bgpIdentifier(struct variable *v, oid name[], size_t *length, |
648 | int exact, size_t *var_len, | |
649 | WriteMethod **write_method) | |
718e3744 | 650 | { |
d62a17ae | 651 | struct bgp *bgp; |
718e3744 | 652 | |
d62a17ae | 653 | if (smux_header_generic(v, name, length, exact, var_len, write_method) |
654 | == MATCH_FAILED) | |
655 | return NULL; | |
718e3744 | 656 | |
d62a17ae | 657 | bgp = bgp_get_default(); |
658 | if (!bgp) | |
659 | return NULL; | |
718e3744 | 660 | |
d62a17ae | 661 | return SNMP_IPADDRESS(bgp->router_id); |
718e3744 | 662 | } |
663 | ||
d62a17ae | 664 | static u_char *bgpRcvdPathAttrTable(struct variable *v, oid name[], |
665 | size_t *length, int exact, size_t *var_len, | |
666 | WriteMethod **write_method) | |
718e3744 | 667 | { |
d62a17ae | 668 | /* Received Path Attribute Table. This table contains, one entry |
669 | per path to a network, path attributes received from all peers | |
670 | running BGP version 3 or less. This table is obsolete, having | |
671 | been replaced in functionality with the bgp4PathAttrTable. */ | |
672 | return NULL; | |
718e3744 | 673 | } |
674 | ||
d62a17ae | 675 | static struct bgp_info *bgp4PathAttrLookup(struct variable *v, oid name[], |
676 | size_t *length, struct bgp *bgp, | |
677 | struct prefix_ipv4 *addr, int exact) | |
718e3744 | 678 | { |
d62a17ae | 679 | oid *offset; |
680 | int offsetlen; | |
681 | struct bgp_info *binfo; | |
682 | struct bgp_info *min; | |
683 | struct bgp_node *rn; | |
684 | union sockunion su; | |
685 | unsigned int len; | |
686 | struct in_addr paddr; | |
687 | ||
688 | sockunion_init(&su); | |
689 | ||
690 | #define BGP_PATHATTR_ENTRY_OFFSET (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE) | |
691 | ||
692 | if (exact) { | |
693 | if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET) | |
694 | return NULL; | |
695 | ||
696 | /* Set OID offset for prefix. */ | |
697 | offset = name + v->namelen; | |
698 | oid2in_addr(offset, IN_ADDR_SIZE, &addr->prefix); | |
699 | offset += IN_ADDR_SIZE; | |
700 | ||
701 | /* Prefix length. */ | |
702 | addr->prefixlen = *offset; | |
703 | offset++; | |
704 | ||
705 | /* Peer address. */ | |
706 | su.sin.sin_family = AF_INET; | |
707 | oid2in_addr(offset, IN_ADDR_SIZE, &su.sin.sin_addr); | |
708 | ||
709 | /* Lookup node. */ | |
710 | rn = bgp_node_lookup(bgp->rib[AFI_IP][SAFI_UNICAST], | |
711 | (struct prefix *)addr); | |
712 | if (rn) { | |
713 | bgp_unlock_node(rn); | |
714 | ||
715 | for (binfo = rn->info; binfo; binfo = binfo->next) | |
716 | if (sockunion_same(&binfo->peer->su, &su)) | |
717 | return binfo; | |
718 | } | |
719 | } else { | |
720 | offset = name + v->namelen; | |
721 | offsetlen = *length - v->namelen; | |
722 | len = offsetlen; | |
718e3744 | 723 | |
d62a17ae | 724 | if (offsetlen == 0) |
725 | rn = bgp_table_top(bgp->rib[AFI_IP][SAFI_UNICAST]); | |
726 | else { | |
727 | if (len > IN_ADDR_SIZE) | |
728 | len = IN_ADDR_SIZE; | |
718e3744 | 729 | |
d62a17ae | 730 | oid2in_addr(offset, len, &addr->prefix); |
718e3744 | 731 | |
d62a17ae | 732 | offset += IN_ADDR_SIZE; |
733 | offsetlen -= IN_ADDR_SIZE; | |
718e3744 | 734 | |
d62a17ae | 735 | if (offsetlen > 0) |
736 | addr->prefixlen = *offset; | |
737 | else | |
738 | addr->prefixlen = len * 8; | |
718e3744 | 739 | |
d62a17ae | 740 | rn = bgp_node_get(bgp->rib[AFI_IP][SAFI_UNICAST], |
741 | (struct prefix *)addr); | |
718e3744 | 742 | |
d62a17ae | 743 | offset++; |
744 | offsetlen--; | |
745 | } | |
718e3744 | 746 | |
d62a17ae | 747 | if (offsetlen > 0) { |
748 | len = offsetlen; | |
749 | if (len > IN_ADDR_SIZE) | |
750 | len = IN_ADDR_SIZE; | |
751 | ||
752 | oid2in_addr(offset, len, &paddr); | |
753 | } else | |
754 | paddr.s_addr = 0; | |
755 | ||
756 | if (!rn) | |
757 | return NULL; | |
758 | ||
759 | do { | |
760 | min = NULL; | |
761 | ||
762 | for (binfo = rn->info; binfo; binfo = binfo->next) { | |
763 | if (binfo->peer->su.sin.sin_family == AF_INET | |
764 | && ntohl(paddr.s_addr) | |
765 | < ntohl(binfo->peer->su.sin | |
766 | .sin_addr | |
767 | .s_addr)) { | |
768 | if (min) { | |
769 | if (ntohl(binfo->peer->su.sin | |
770 | .sin_addr | |
771 | .s_addr) | |
772 | < ntohl(min->peer->su.sin | |
773 | .sin_addr | |
774 | .s_addr)) | |
775 | min = binfo; | |
776 | } else | |
777 | min = binfo; | |
778 | } | |
779 | } | |
780 | ||
781 | if (min) { | |
782 | *length = | |
783 | v->namelen + BGP_PATHATTR_ENTRY_OFFSET; | |
784 | ||
785 | offset = name + v->namelen; | |
786 | oid_copy_addr(offset, &rn->p.u.prefix4, | |
787 | IN_ADDR_SIZE); | |
788 | offset += IN_ADDR_SIZE; | |
789 | *offset = rn->p.prefixlen; | |
790 | offset++; | |
791 | oid_copy_addr(offset, | |
792 | &min->peer->su.sin.sin_addr, | |
793 | IN_ADDR_SIZE); | |
794 | addr->prefix = rn->p.u.prefix4; | |
795 | addr->prefixlen = rn->p.prefixlen; | |
796 | ||
797 | bgp_unlock_node(rn); | |
798 | ||
799 | return min; | |
800 | } | |
801 | ||
802 | paddr.s_addr = 0; | |
803 | } while ((rn = bgp_route_next(rn)) != NULL); | |
718e3744 | 804 | } |
d62a17ae | 805 | return NULL; |
718e3744 | 806 | } |
807 | ||
d62a17ae | 808 | static u_char *bgp4PathAttrTable(struct variable *v, oid name[], size_t *length, |
809 | int exact, size_t *var_len, | |
810 | WriteMethod **write_method) | |
718e3744 | 811 | { |
d62a17ae | 812 | struct bgp *bgp; |
813 | struct bgp_info *binfo; | |
814 | struct prefix_ipv4 addr; | |
815 | ||
816 | bgp = bgp_get_default(); | |
817 | if (!bgp) | |
818 | return NULL; | |
819 | ||
820 | if (smux_header_table(v, name, length, exact, var_len, write_method) | |
821 | == MATCH_FAILED) | |
822 | return NULL; | |
823 | memset(&addr, 0, sizeof(struct prefix_ipv4)); | |
824 | ||
825 | binfo = bgp4PathAttrLookup(v, name, length, bgp, &addr, exact); | |
826 | if (!binfo) | |
827 | return NULL; | |
828 | ||
829 | switch (v->magic) { | |
830 | case BGP4PATHATTRPEER: /* 1 */ | |
831 | return SNMP_IPADDRESS(binfo->peer->su.sin.sin_addr); | |
832 | break; | |
833 | case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */ | |
834 | return SNMP_INTEGER(addr.prefixlen); | |
835 | break; | |
836 | case BGP4PATHATTRIPADDRPREFIX: /* 3 */ | |
837 | return SNMP_IPADDRESS(addr.prefix); | |
838 | break; | |
839 | case BGP4PATHATTRORIGIN: /* 4 */ | |
840 | return SNMP_INTEGER(binfo->attr->origin); | |
841 | break; | |
842 | case BGP4PATHATTRASPATHSEGMENT: /* 5 */ | |
843 | return aspath_snmp_pathseg(binfo->attr->aspath, var_len); | |
844 | break; | |
845 | case BGP4PATHATTRNEXTHOP: /* 6 */ | |
846 | return SNMP_IPADDRESS(binfo->attr->nexthop); | |
847 | break; | |
848 | case BGP4PATHATTRMULTIEXITDISC: /* 7 */ | |
849 | return SNMP_INTEGER(binfo->attr->med); | |
850 | break; | |
851 | case BGP4PATHATTRLOCALPREF: /* 8 */ | |
852 | return SNMP_INTEGER(binfo->attr->local_pref); | |
853 | break; | |
854 | case BGP4PATHATTRATOMICAGGREGATE: /* 9 */ | |
855 | return SNMP_INTEGER(1); | |
856 | break; | |
857 | case BGP4PATHATTRAGGREGATORAS: /* 10 */ | |
858 | return SNMP_INTEGER(binfo->attr->aggregator_as); | |
859 | break; | |
860 | case BGP4PATHATTRAGGREGATORADDR: /* 11 */ | |
861 | return SNMP_IPADDRESS(binfo->attr->aggregator_addr); | |
862 | break; | |
863 | case BGP4PATHATTRCALCLOCALPREF: /* 12 */ | |
864 | return SNMP_INTEGER(-1); | |
865 | break; | |
866 | case BGP4PATHATTRBEST: /* 13 */ | |
9d303b37 DL |
867 | /* $FRR indent$ */ |
868 | /* clang-format off */ | |
718e3744 | 869 | #define BGP4_PathAttrBest_false 1 |
870 | #define BGP4_PathAttrBest_true 2 | |
d62a17ae | 871 | if (CHECK_FLAG(binfo->flags, BGP_INFO_SELECTED)) |
872 | return SNMP_INTEGER(BGP4_PathAttrBest_true); | |
873 | else | |
874 | return SNMP_INTEGER(BGP4_PathAttrBest_false); | |
875 | break; | |
876 | case BGP4PATHATTRUNKNOWN: /* 14 */ | |
877 | *var_len = 0; | |
878 | return NULL; | |
879 | break; | |
880 | } | |
881 | return NULL; | |
718e3744 | 882 | } |
6b0655a2 | 883 | |
718e3744 | 884 | /* BGP Traps. */ |
d62a17ae | 885 | static struct trap_object bgpTrapList[] = {{3, {3, 1, BGPPEERLASTERROR}}, |
886 | {3, {3, 1, BGPPEERSTATE}}}; | |
718e3744 | 887 | |
d62a17ae | 888 | static int bgpTrapEstablished(struct peer *peer) |
718e3744 | 889 | { |
d62a17ae | 890 | int ret; |
891 | struct in_addr addr; | |
892 | oid index[sizeof(oid) * IN_ADDR_SIZE]; | |
893 | ||
894 | ret = inet_aton(peer->host, &addr); | |
895 | if (ret == 0) | |
896 | return 0; | |
897 | ||
898 | oid_copy_addr(index, &addr, IN_ADDR_SIZE); | |
899 | ||
900 | smux_trap(bgp_variables, sizeof bgp_variables / sizeof(struct variable), | |
901 | bgp_trap_oid, sizeof bgp_trap_oid / sizeof(oid), bgp_oid, | |
902 | sizeof bgp_oid / sizeof(oid), index, IN_ADDR_SIZE, | |
903 | bgpTrapList, sizeof bgpTrapList / sizeof(struct trap_object), | |
904 | BGPESTABLISHED); | |
905 | return 0; | |
718e3744 | 906 | } |
907 | ||
d62a17ae | 908 | static int bgpTrapBackwardTransition(struct peer *peer) |
718e3744 | 909 | { |
d62a17ae | 910 | int ret; |
911 | struct in_addr addr; | |
912 | oid index[sizeof(oid) * IN_ADDR_SIZE]; | |
913 | ||
914 | ret = inet_aton(peer->host, &addr); | |
915 | if (ret == 0) | |
916 | return 0; | |
917 | ||
918 | oid_copy_addr(index, &addr, IN_ADDR_SIZE); | |
919 | ||
920 | smux_trap(bgp_variables, sizeof bgp_variables / sizeof(struct variable), | |
921 | bgp_trap_oid, sizeof bgp_trap_oid / sizeof(oid), bgp_oid, | |
922 | sizeof bgp_oid / sizeof(oid), index, IN_ADDR_SIZE, | |
923 | bgpTrapList, sizeof bgpTrapList / sizeof(struct trap_object), | |
924 | BGPBACKWARDTRANSITION); | |
925 | return 0; | |
718e3744 | 926 | } |
927 | ||
d62a17ae | 928 | static int bgp_snmp_init(struct thread_master *tm) |
5986b66b | 929 | { |
d62a17ae | 930 | smux_init(tm); |
931 | REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid); | |
932 | return 0; | |
5986b66b | 933 | } |
3012671f | 934 | |
d62a17ae | 935 | static int bgp_snmp_module_init(void) |
718e3744 | 936 | { |
d62a17ae | 937 | hook_register(peer_established, bgpTrapEstablished); |
938 | hook_register(peer_backward_transition, bgpTrapBackwardTransition); | |
939 | hook_register(frr_late_init, bgp_snmp_init); | |
940 | return 0; | |
718e3744 | 941 | } |
5986b66b | 942 | |
d62a17ae | 943 | FRR_MODULE_SETUP(.name = "bgpd_snmp", .version = FRR_VERSION, |
944 | .description = "bgpd AgentX SNMP module", | |
945 | .init = bgp_snmp_module_init) |