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718e3744 | 1 | /* SNMP support |
2 | * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org> | |
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 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #ifdef HAVE_SNMP | |
07661cb5 | 25 | #ifdef HAVE_NETSNMP |
26 | #include <net-snmp/net-snmp-config.h> | |
27 | #endif | |
718e3744 | 28 | #include <asn1.h> |
29 | #include <snmp.h> | |
30 | #include <snmp_impl.h> | |
31 | ||
718e3744 | 32 | #include "log.h" |
33 | #include "thread.h" | |
34 | #include "linklist.h" | |
35 | #include "command.h" | |
5e4fa164 | 36 | #include <lib/version.h> |
718e3744 | 37 | #include "memory.h" |
38 | #include "sockunion.h" | |
dd488a78 | 39 | #include "smux.h" |
718e3744 | 40 | |
41 | #define min(A,B) ((A) < (B) ? (A) : (B)) | |
42 | ||
43 | enum smux_event {SMUX_SCHEDULE, SMUX_CONNECT, SMUX_READ}; | |
44 | ||
45 | void smux_event (enum smux_event, int); | |
46 | \f | |
47 | ||
48 | /* SMUX socket. */ | |
49 | int smux_sock = -1; | |
50 | ||
51 | /* SMUX subtree list. */ | |
52 | struct list *treelist; | |
53 | ||
54 | /* SMUX oid. */ | |
c75105ab | 55 | oid *smux_oid = NULL; |
718e3744 | 56 | size_t smux_oid_len; |
57 | ||
718e3744 | 58 | /* SMUX password. */ |
c75105ab | 59 | char *smux_passwd = NULL; |
718e3744 | 60 | |
61 | /* SMUX read threads. */ | |
62 | struct thread *smux_read_thread; | |
63 | ||
64 | /* SMUX connect thrads. */ | |
65 | struct thread *smux_connect_thread; | |
66 | ||
67 | /* SMUX debug flag. */ | |
68 | int debug_smux = 0; | |
69 | ||
70 | /* SMUX failure count. */ | |
71 | int fail = 0; | |
72 | ||
73 | /* SMUX node. */ | |
74 | struct cmd_node smux_node = | |
75 | { | |
76 | SMUX_NODE, | |
77 | "" /* SMUX has no interface. */ | |
78 | }; | |
dd488a78 | 79 | |
80 | /* thread master */ | |
81 | static struct thread_master *master; | |
718e3744 | 82 | \f |
83 | void * | |
84 | oid_copy (void *dest, void *src, size_t size) | |
85 | { | |
86 | return memcpy (dest, src, size * sizeof (oid)); | |
87 | } | |
88 | ||
89 | void | |
90 | oid2in_addr (oid oid[], int len, struct in_addr *addr) | |
91 | { | |
92 | int i; | |
93 | u_char *pnt; | |
94 | ||
95 | if (len == 0) | |
96 | return; | |
97 | ||
98 | pnt = (u_char *) addr; | |
99 | ||
100 | for (i = 0; i < len; i++) | |
101 | *pnt++ = oid[i]; | |
102 | } | |
103 | ||
104 | void | |
105 | oid_copy_addr (oid oid[], struct in_addr *addr, int len) | |
106 | { | |
107 | int i; | |
108 | u_char *pnt; | |
109 | ||
110 | if (len == 0) | |
111 | return; | |
112 | ||
113 | pnt = (u_char *) addr; | |
114 | ||
115 | for (i = 0; i < len; i++) | |
116 | oid[i] = *pnt++; | |
117 | } | |
118 | ||
119 | int | |
120 | oid_compare (oid *o1, int o1_len, oid *o2, int o2_len) | |
121 | { | |
122 | int i; | |
123 | ||
124 | for (i = 0; i < min (o1_len, o2_len); i++) | |
125 | { | |
126 | if (o1[i] < o2[i]) | |
127 | return -1; | |
128 | else if (o1[i] > o2[i]) | |
129 | return 1; | |
130 | } | |
131 | if (o1_len < o2_len) | |
132 | return -1; | |
133 | if (o1_len > o2_len) | |
134 | return 1; | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | int | |
140 | oid_compare_part (oid *o1, int o1_len, oid *o2, int o2_len) | |
141 | { | |
142 | int i; | |
143 | ||
144 | for (i = 0; i < min (o1_len, o2_len); i++) | |
145 | { | |
146 | if (o1[i] < o2[i]) | |
147 | return -1; | |
148 | else if (o1[i] > o2[i]) | |
149 | return 1; | |
150 | } | |
151 | if (o1_len < o2_len) | |
152 | return -1; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | \f | |
157 | void | |
9035efaa | 158 | smux_oid_dump (const char *prefix, oid *oid, size_t oid_len) |
718e3744 | 159 | { |
9035efaa | 160 | unsigned int i; |
718e3744 | 161 | int first = 1; |
162 | char buf[MAX_OID_LEN * 3]; | |
163 | ||
164 | buf[0] = '\0'; | |
165 | ||
166 | for (i = 0; i < oid_len; i++) | |
167 | { | |
168 | sprintf (buf + strlen (buf), "%s%d", first ? "" : ".", (int) oid[i]); | |
169 | first = 0; | |
170 | } | |
8ddca704 | 171 | zlog_debug ("%s: %s", prefix, buf); |
718e3744 | 172 | } |
173 | ||
174 | int | |
175 | smux_socket () | |
176 | { | |
177 | int ret; | |
178 | #ifdef HAVE_IPV6 | |
179 | struct addrinfo hints, *res0, *res; | |
180 | int gai; | |
181 | #else | |
182 | struct sockaddr_in serv; | |
183 | struct servent *sp; | |
184 | #endif | |
185 | int sock = 0; | |
186 | ||
187 | #ifdef HAVE_IPV6 | |
188 | memset(&hints, 0, sizeof(hints)); | |
189 | hints.ai_family = PF_UNSPEC; | |
190 | hints.ai_socktype = SOCK_STREAM; | |
191 | gai = getaddrinfo(NULL, "smux", &hints, &res0); | |
192 | if (gai == EAI_SERVICE) | |
193 | { | |
194 | char servbuf[NI_MAXSERV]; | |
195 | sprintf(servbuf,"%d",SMUX_PORT_DEFAULT); | |
196 | servbuf[sizeof (servbuf) - 1] = '\0'; | |
197 | gai = getaddrinfo(NULL, servbuf, &hints, &res0); | |
198 | } | |
199 | if (gai) | |
200 | { | |
201 | zlog_warn("Cannot locate loopback service smux"); | |
202 | return -1; | |
203 | } | |
204 | for(res=res0; res; res=res->ai_next) | |
205 | { | |
206 | if (res->ai_family != AF_INET | |
207 | #ifdef HAVE_IPV6 | |
208 | && res->ai_family != AF_INET6 | |
209 | #endif /* HAVE_IPV6 */ | |
210 | ) | |
211 | continue; | |
212 | ||
213 | sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
214 | if (sock < 0) | |
215 | continue; | |
216 | sockopt_reuseaddr (sock); | |
217 | sockopt_reuseport (sock); | |
218 | ret = connect (sock, res->ai_addr, res->ai_addrlen); | |
219 | if (ret < 0) | |
220 | { | |
221 | close(sock); | |
222 | sock = -1; | |
223 | continue; | |
224 | } | |
225 | break; | |
226 | } | |
227 | freeaddrinfo(res0); | |
228 | if (sock < 0) | |
229 | zlog_warn ("Can't connect to SNMP agent with SMUX"); | |
230 | #else | |
231 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
232 | if (sock < 0) | |
233 | { | |
234 | zlog_warn ("Can't make socket for SNMP"); | |
235 | return -1; | |
236 | } | |
237 | ||
238 | memset (&serv, 0, sizeof (struct sockaddr_in)); | |
239 | serv.sin_family = AF_INET; | |
240 | #ifdef HAVE_SIN_LEN | |
241 | serv.sin_len = sizeof (struct sockaddr_in); | |
242 | #endif /* HAVE_SIN_LEN */ | |
243 | ||
244 | sp = getservbyname ("smux", "tcp"); | |
245 | if (sp != NULL) | |
246 | serv.sin_port = sp->s_port; | |
247 | else | |
248 | serv.sin_port = htons (SMUX_PORT_DEFAULT); | |
249 | ||
250 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); | |
251 | ||
252 | sockopt_reuseaddr (sock); | |
253 | sockopt_reuseport (sock); | |
254 | ||
255 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (struct sockaddr_in)); | |
256 | if (ret < 0) | |
257 | { | |
258 | close (sock); | |
259 | smux_sock = -1; | |
260 | zlog_warn ("Can't connect to SNMP agent with SMUX"); | |
261 | return -1; | |
262 | } | |
263 | #endif | |
264 | return sock; | |
265 | } | |
266 | ||
267 | void | |
268 | smux_getresp_send (oid objid[], size_t objid_len, long reqid, long errstat, | |
269 | long errindex, u_char val_type, void *arg, size_t arg_len) | |
270 | { | |
271 | int ret; | |
272 | u_char buf[BUFSIZ]; | |
273 | u_char *ptr, *h1, *h1e, *h2, *h2e; | |
70e149e0 | 274 | size_t len, length; |
718e3744 | 275 | |
276 | ptr = buf; | |
277 | len = BUFSIZ; | |
278 | length = len; | |
279 | ||
280 | if (debug_smux) | |
281 | { | |
8ddca704 | 282 | zlog_debug ("SMUX GETRSP send"); |
283 | zlog_debug ("SMUX GETRSP reqid: %ld", reqid); | |
718e3744 | 284 | } |
285 | ||
286 | h1 = ptr; | |
287 | /* Place holder h1 for complete sequence */ | |
288 | ptr = asn_build_sequence (ptr, &len, (u_char) SMUX_GETRSP, 0); | |
289 | h1e = ptr; | |
290 | ||
291 | ptr = asn_build_int (ptr, &len, | |
292 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
293 | &reqid, sizeof (reqid)); | |
294 | ||
295 | if (debug_smux) | |
8ddca704 | 296 | zlog_debug ("SMUX GETRSP errstat: %ld", errstat); |
718e3744 | 297 | |
298 | ptr = asn_build_int (ptr, &len, | |
299 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
300 | &errstat, sizeof (errstat)); | |
301 | if (debug_smux) | |
8ddca704 | 302 | zlog_debug ("SMUX GETRSP errindex: %ld", errindex); |
718e3744 | 303 | |
304 | ptr = asn_build_int (ptr, &len, | |
305 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
306 | &errindex, sizeof (errindex)); | |
307 | ||
308 | h2 = ptr; | |
309 | /* Place holder h2 for one variable */ | |
310 | ptr = asn_build_sequence (ptr, &len, | |
311 | (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
312 | 0); | |
313 | h2e = ptr; | |
314 | ||
315 | ptr = snmp_build_var_op (ptr, objid, &objid_len, | |
316 | val_type, arg_len, arg, &len); | |
317 | ||
318 | /* Now variable size is known, fill in size */ | |
319 | asn_build_sequence(h2,&length,(u_char)(ASN_SEQUENCE|ASN_CONSTRUCTOR),ptr-h2e); | |
320 | ||
321 | /* Fill in size of whole sequence */ | |
322 | asn_build_sequence(h1,&length,(u_char)SMUX_GETRSP,ptr-h1e); | |
323 | ||
324 | if (debug_smux) | |
8ddca704 | 325 | zlog_debug ("SMUX getresp send: %ld", (ptr - buf)); |
718e3744 | 326 | |
327 | ret = send (smux_sock, buf, (ptr - buf), 0); | |
328 | } | |
329 | ||
330 | char * | |
70e149e0 | 331 | smux_var (char *ptr, size_t len, oid objid[], size_t *objid_len, |
718e3744 | 332 | size_t *var_val_len, |
333 | u_char *var_val_type, | |
334 | void **var_value) | |
335 | { | |
336 | u_char type; | |
337 | u_char val_type; | |
338 | size_t val_len; | |
339 | u_char *val; | |
340 | ||
341 | if (debug_smux) | |
8ddca704 | 342 | zlog_debug ("SMUX var parse: len %ld", len); |
718e3744 | 343 | |
344 | /* Parse header. */ | |
345 | ptr = asn_parse_header (ptr, &len, &type); | |
346 | ||
347 | if (debug_smux) | |
348 | { | |
8ddca704 | 349 | zlog_debug ("SMUX var parse: type %d len %ld", type, len); |
350 | zlog_debug ("SMUX var parse: type must be %d", | |
718e3744 | 351 | (ASN_SEQUENCE | ASN_CONSTRUCTOR)); |
352 | } | |
353 | ||
354 | /* Parse var option. */ | |
355 | *objid_len = MAX_OID_LEN; | |
356 | ptr = snmp_parse_var_op(ptr, objid, objid_len, &val_type, | |
357 | &val_len, &val, &len); | |
358 | ||
359 | if (var_val_len) | |
360 | *var_val_len = val_len; | |
361 | ||
362 | if (var_value) | |
363 | *var_value = (void*) val; | |
364 | ||
365 | if (var_val_type) | |
366 | *var_val_type = val_type; | |
367 | ||
368 | /* Requested object id length is objid_len. */ | |
369 | if (debug_smux) | |
370 | smux_oid_dump ("Request OID", objid, *objid_len); | |
371 | ||
372 | if (debug_smux) | |
8ddca704 | 373 | zlog_debug ("SMUX val_type: %d", val_type); |
718e3744 | 374 | |
375 | /* Check request value type. */ | |
376 | if (debug_smux) | |
377 | switch (val_type) | |
378 | { | |
379 | case ASN_NULL: | |
380 | /* In case of SMUX_GET or SMUX_GET_NEXT val_type is set to | |
381 | ASN_NULL. */ | |
8ddca704 | 382 | zlog_debug ("ASN_NULL"); |
718e3744 | 383 | break; |
384 | ||
385 | case ASN_INTEGER: | |
8ddca704 | 386 | zlog_debug ("ASN_INTEGER"); |
718e3744 | 387 | break; |
388 | case ASN_COUNTER: | |
389 | case ASN_GAUGE: | |
390 | case ASN_TIMETICKS: | |
391 | case ASN_UINTEGER: | |
8ddca704 | 392 | zlog_debug ("ASN_COUNTER"); |
718e3744 | 393 | break; |
394 | case ASN_COUNTER64: | |
8ddca704 | 395 | zlog_debug ("ASN_COUNTER64"); |
718e3744 | 396 | break; |
397 | case ASN_IPADDRESS: | |
8ddca704 | 398 | zlog_debug ("ASN_IPADDRESS"); |
718e3744 | 399 | break; |
400 | case ASN_OCTET_STR: | |
8ddca704 | 401 | zlog_debug ("ASN_OCTET_STR"); |
718e3744 | 402 | break; |
403 | case ASN_OPAQUE: | |
404 | case ASN_NSAP: | |
405 | case ASN_OBJECT_ID: | |
8ddca704 | 406 | zlog_debug ("ASN_OPAQUE"); |
718e3744 | 407 | break; |
408 | case SNMP_NOSUCHOBJECT: | |
8ddca704 | 409 | zlog_debug ("SNMP_NOSUCHOBJECT"); |
718e3744 | 410 | break; |
411 | case SNMP_NOSUCHINSTANCE: | |
8ddca704 | 412 | zlog_debug ("SNMP_NOSUCHINSTANCE"); |
718e3744 | 413 | break; |
414 | case SNMP_ENDOFMIBVIEW: | |
8ddca704 | 415 | zlog_debug ("SNMP_ENDOFMIBVIEW"); |
718e3744 | 416 | break; |
417 | case ASN_BIT_STR: | |
8ddca704 | 418 | zlog_debug ("ASN_BIT_STR"); |
718e3744 | 419 | break; |
420 | default: | |
8ddca704 | 421 | zlog_debug ("Unknown type"); |
718e3744 | 422 | break; |
423 | } | |
424 | return ptr; | |
425 | } | |
426 | ||
427 | /* NOTE: all 3 functions (smux_set, smux_get & smux_getnext) are based on | |
428 | ucd-snmp smux and as such suppose, that the peer receives in the message | |
429 | only one variable. Fortunately, IBM seems to do the same in AIX. */ | |
430 | ||
431 | int | |
432 | smux_set (oid *reqid, size_t *reqid_len, | |
433 | u_char val_type, void *val, size_t val_len, int action) | |
434 | { | |
435 | int j; | |
436 | struct subtree *subtree; | |
437 | struct variable *v; | |
438 | int subresult; | |
439 | oid *suffix; | |
70e149e0 | 440 | size_t suffix_len; |
718e3744 | 441 | int result; |
442 | u_char *statP = NULL; | |
443 | WriteMethod *write_method = NULL; | |
444 | struct listnode *node; | |
445 | ||
446 | /* Check */ | |
447 | for (node = treelist->head; node; node = node->next) | |
448 | { | |
449 | subtree = node->data; | |
450 | subresult = oid_compare_part (reqid, *reqid_len, | |
451 | subtree->name, subtree->name_len); | |
452 | ||
453 | /* Subtree matched. */ | |
454 | if (subresult == 0) | |
455 | { | |
456 | /* Prepare suffix. */ | |
457 | suffix = reqid + subtree->name_len; | |
458 | suffix_len = *reqid_len - subtree->name_len; | |
459 | result = subresult; | |
460 | ||
461 | /* Check variables. */ | |
462 | for (j = 0; j < subtree->variables_num; j++) | |
463 | { | |
464 | v = &subtree->variables[j]; | |
465 | ||
466 | /* Always check suffix */ | |
467 | result = oid_compare_part (suffix, suffix_len, | |
468 | v->name, v->namelen); | |
469 | ||
470 | /* This is exact match so result must be zero. */ | |
471 | if (result == 0) | |
472 | { | |
473 | if (debug_smux) | |
8ddca704 | 474 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 475 | |
476 | statP = (*v->findVar) (v, suffix, &suffix_len, 1, | |
477 | &val_len, &write_method); | |
478 | ||
479 | if (write_method) | |
480 | { | |
481 | return (*write_method)(action, val, val_type, val_len, | |
482 | statP, suffix, suffix_len, v); | |
483 | } | |
484 | else | |
485 | { | |
486 | return SNMP_ERR_READONLY; | |
487 | } | |
488 | } | |
489 | ||
490 | /* If above execution is failed or oid is small (so | |
491 | there is no further match). */ | |
492 | if (result < 0) | |
493 | return SNMP_ERR_NOSUCHNAME; | |
494 | } | |
495 | } | |
496 | } | |
497 | return SNMP_ERR_NOSUCHNAME; | |
498 | } | |
499 | ||
500 | int | |
501 | smux_get (oid *reqid, size_t *reqid_len, int exact, | |
502 | u_char *val_type,void **val, size_t *val_len) | |
503 | { | |
504 | int j; | |
505 | struct subtree *subtree; | |
506 | struct variable *v; | |
507 | int subresult; | |
508 | oid *suffix; | |
70e149e0 | 509 | size_t suffix_len; |
718e3744 | 510 | int result; |
511 | WriteMethod *write_method=NULL; | |
512 | struct listnode *node; | |
513 | ||
514 | /* Check */ | |
515 | for (node = treelist->head; node; node = node->next) | |
516 | { | |
517 | subtree = node->data; | |
518 | subresult = oid_compare_part (reqid, *reqid_len, | |
519 | subtree->name, subtree->name_len); | |
520 | ||
521 | /* Subtree matched. */ | |
522 | if (subresult == 0) | |
523 | { | |
524 | /* Prepare suffix. */ | |
525 | suffix = reqid + subtree->name_len; | |
526 | suffix_len = *reqid_len - subtree->name_len; | |
527 | result = subresult; | |
528 | ||
529 | /* Check variables. */ | |
530 | for (j = 0; j < subtree->variables_num; j++) | |
531 | { | |
532 | v = &subtree->variables[j]; | |
533 | ||
534 | /* Always check suffix */ | |
535 | result = oid_compare_part (suffix, suffix_len, | |
536 | v->name, v->namelen); | |
537 | ||
538 | /* This is exact match so result must be zero. */ | |
539 | if (result == 0) | |
540 | { | |
541 | if (debug_smux) | |
8ddca704 | 542 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 543 | |
544 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
545 | val_len, &write_method); | |
546 | ||
547 | /* There is no instance. */ | |
548 | if (*val == NULL) | |
549 | return SNMP_NOSUCHINSTANCE; | |
550 | ||
551 | /* Call is suceed. */ | |
552 | *val_type = v->type; | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | /* If above execution is failed or oid is small (so | |
558 | there is no further match). */ | |
559 | if (result < 0) | |
560 | return SNMP_ERR_NOSUCHNAME; | |
561 | } | |
562 | } | |
563 | } | |
564 | return SNMP_ERR_NOSUCHNAME; | |
565 | } | |
566 | ||
567 | int | |
568 | smux_getnext (oid *reqid, size_t *reqid_len, int exact, | |
569 | u_char *val_type,void **val, size_t *val_len) | |
570 | { | |
571 | int j; | |
572 | oid save[MAX_OID_LEN]; | |
573 | int savelen = 0; | |
574 | struct subtree *subtree; | |
575 | struct variable *v; | |
576 | int subresult; | |
577 | oid *suffix; | |
70e149e0 | 578 | size_t suffix_len; |
718e3744 | 579 | int result; |
580 | WriteMethod *write_method=NULL; | |
581 | struct listnode *node; | |
582 | ||
583 | ||
584 | /* Save incoming request. */ | |
585 | oid_copy (save, reqid, *reqid_len); | |
586 | savelen = *reqid_len; | |
587 | ||
588 | /* Check */ | |
589 | for (node = treelist->head; node; node = node->next) | |
590 | { | |
591 | subtree = node->data; | |
592 | subresult = oid_compare_part (reqid, *reqid_len, | |
593 | subtree->name, subtree->name_len); | |
594 | ||
595 | /* If request is in the tree. The agent has to make sure we | |
596 | only receive requests we have registered for. */ | |
597 | /* Unfortunately, that's not true. In fact, a SMUX subagent has to | |
598 | behave as if it manages the whole SNMP MIB tree itself. It's the | |
599 | duty of the master agent to collect the best answer and return it | |
600 | to the manager. See RFC 1227 chapter 3.1.6 for the glory details | |
601 | :-). ucd-snmp really behaves bad here as it actually might ask | |
602 | multiple times for the same GETNEXT request as it throws away the | |
603 | answer when it expects it in a different subtree and might come | |
604 | back later with the very same request. --jochen */ | |
605 | ||
606 | if (subresult <= 0) | |
607 | { | |
608 | /* Prepare suffix. */ | |
609 | suffix = reqid + subtree->name_len; | |
610 | suffix_len = *reqid_len - subtree->name_len; | |
611 | if (subresult < 0) | |
612 | { | |
613 | oid_copy(reqid, subtree->name, subtree->name_len); | |
614 | *reqid_len = subtree->name_len; | |
615 | } | |
616 | for (j = 0; j < subtree->variables_num; j++) | |
617 | { | |
618 | result = subresult; | |
619 | v = &subtree->variables[j]; | |
620 | ||
621 | /* Next then check result >= 0. */ | |
622 | if (result == 0) | |
623 | result = oid_compare_part (suffix, suffix_len, | |
624 | v->name, v->namelen); | |
625 | ||
626 | if (result <= 0) | |
627 | { | |
628 | if (debug_smux) | |
8ddca704 | 629 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 630 | if(result<0) |
631 | { | |
632 | oid_copy(suffix, v->name, v->namelen); | |
633 | suffix_len = v->namelen; | |
634 | } | |
635 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
636 | val_len, &write_method); | |
637 | *reqid_len = suffix_len + subtree->name_len; | |
638 | if (*val) | |
639 | { | |
640 | *val_type = v->type; | |
641 | return 0; | |
642 | } | |
643 | } | |
644 | } | |
645 | } | |
646 | } | |
647 | memcpy (reqid, save, savelen * sizeof(oid)); | |
648 | *reqid_len = savelen; | |
649 | ||
650 | return SNMP_ERR_NOSUCHNAME; | |
651 | } | |
652 | ||
653 | /* GET message header. */ | |
654 | char * | |
655 | smux_parse_get_header (char *ptr, size_t *len, long *reqid) | |
656 | { | |
657 | u_char type; | |
658 | long errstat; | |
659 | long errindex; | |
660 | ||
661 | /* Request ID. */ | |
662 | ptr = asn_parse_int (ptr, len, &type, reqid, sizeof (*reqid)); | |
663 | ||
664 | if (debug_smux) | |
8ddca704 | 665 | zlog_debug ("SMUX GET reqid: %d len: %d", (int) *reqid, (int) *len); |
718e3744 | 666 | |
667 | /* Error status. */ | |
668 | ptr = asn_parse_int (ptr, len, &type, &errstat, sizeof (errstat)); | |
669 | ||
670 | if (debug_smux) | |
8ddca704 | 671 | zlog_debug ("SMUX GET errstat %ld len: %ld", errstat, *len); |
718e3744 | 672 | |
673 | /* Error index. */ | |
674 | ptr = asn_parse_int (ptr, len, &type, &errindex, sizeof (errindex)); | |
675 | ||
676 | if (debug_smux) | |
8ddca704 | 677 | zlog_debug ("SMUX GET errindex %ld len: %ld", errindex, *len); |
718e3744 | 678 | |
679 | return ptr; | |
680 | } | |
681 | ||
682 | void | |
683 | smux_parse_set (char *ptr, size_t len, int action) | |
684 | { | |
685 | long reqid; | |
686 | oid oid[MAX_OID_LEN]; | |
687 | size_t oid_len; | |
688 | u_char val_type; | |
689 | void *val; | |
690 | size_t val_len; | |
691 | int ret; | |
692 | ||
693 | if (debug_smux) | |
8ddca704 | 694 | zlog_debug ("SMUX SET(%s) message parse: len %ld", |
718e3744 | 695 | (RESERVE1 == action) ? "RESERVE1" : ((FREE == action) ? "FREE" : "COMMIT"), |
696 | len); | |
697 | ||
698 | /* Parse SET message header. */ | |
699 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
700 | ||
701 | /* Parse SET message object ID. */ | |
702 | ptr = smux_var (ptr, len, oid, &oid_len, &val_len, &val_type, &val); | |
703 | ||
704 | ret = smux_set (oid, &oid_len, val_type, val, val_len, action); | |
705 | if (debug_smux) | |
8ddca704 | 706 | zlog_debug ("SMUX SET ret %d", ret); |
718e3744 | 707 | |
708 | /* Return result. */ | |
709 | if (RESERVE1 == action) | |
710 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
711 | } | |
712 | ||
713 | void | |
714 | smux_parse_get (char *ptr, size_t len, int exact) | |
715 | { | |
716 | long reqid; | |
717 | oid oid[MAX_OID_LEN]; | |
718 | size_t oid_len; | |
719 | u_char val_type; | |
720 | void *val; | |
721 | size_t val_len; | |
722 | int ret; | |
723 | ||
724 | if (debug_smux) | |
8ddca704 | 725 | zlog_debug ("SMUX GET message parse: len %ld", len); |
718e3744 | 726 | |
727 | /* Parse GET message header. */ | |
728 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
729 | ||
730 | /* Parse GET message object ID. We needn't the value come */ | |
731 | ptr = smux_var (ptr, len, oid, &oid_len, NULL, NULL, NULL); | |
732 | ||
733 | /* Traditional getstatptr. */ | |
734 | if (exact) | |
735 | ret = smux_get (oid, &oid_len, exact, &val_type, &val, &val_len); | |
736 | else | |
737 | ret = smux_getnext (oid, &oid_len, exact, &val_type, &val, &val_len); | |
738 | ||
739 | /* Return result. */ | |
740 | if (ret == 0) | |
741 | smux_getresp_send (oid, oid_len, reqid, 0, 0, val_type, val, val_len); | |
742 | else | |
743 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
744 | } | |
745 | ||
746 | /* Parse SMUX_CLOSE message. */ | |
747 | void | |
748 | smux_parse_close (char *ptr, int len) | |
749 | { | |
750 | long reason = 0; | |
751 | ||
752 | while (len--) | |
753 | { | |
754 | reason = (reason << 8) | (long) *ptr; | |
755 | ptr++; | |
756 | } | |
757 | zlog_info ("SMUX_CLOSE with reason: %ld", reason); | |
758 | } | |
759 | ||
760 | /* SMUX_RRSP message. */ | |
761 | void | |
70e149e0 | 762 | smux_parse_rrsp (char *ptr, size_t len) |
718e3744 | 763 | { |
764 | char val; | |
765 | long errstat; | |
766 | ||
767 | ptr = asn_parse_int (ptr, &len, &val, &errstat, sizeof (errstat)); | |
768 | ||
769 | if (debug_smux) | |
8ddca704 | 770 | zlog_debug ("SMUX_RRSP value: %d errstat: %ld", val, errstat); |
718e3744 | 771 | } |
772 | ||
773 | /* Parse SMUX message. */ | |
774 | int | |
70e149e0 | 775 | smux_parse (char *ptr, size_t len) |
718e3744 | 776 | { |
777 | /* This buffer we'll use for SOUT message. We could allocate it with | |
778 | malloc and save only static pointer/lenght, but IMHO static | |
779 | buffer is a faster solusion. */ | |
780 | static u_char sout_save_buff[SMUXMAXPKTSIZE]; | |
781 | static int sout_save_len = 0; | |
782 | ||
783 | int len_income = len; /* see note below: YYY */ | |
784 | u_char type; | |
785 | u_char rollback; | |
786 | ||
787 | rollback = ptr[2]; /* important only for SMUX_SOUT */ | |
788 | ||
789 | process_rest: /* see note below: YYY */ | |
790 | ||
791 | /* Parse SMUX message type and subsequent length. */ | |
792 | ptr = asn_parse_header (ptr, &len, &type); | |
793 | ||
794 | if (debug_smux) | |
8ddca704 | 795 | zlog_debug ("SMUX message received type: %d rest len: %ld", type, len); |
718e3744 | 796 | |
797 | switch (type) | |
798 | { | |
799 | case SMUX_OPEN: | |
800 | /* Open must be not send from SNMP agent. */ | |
801 | zlog_warn ("SMUX_OPEN received: resetting connection."); | |
802 | return -1; | |
803 | break; | |
804 | case SMUX_RREQ: | |
805 | /* SMUX_RREQ message is invalid for us. */ | |
806 | zlog_warn ("SMUX_RREQ received: resetting connection."); | |
807 | return -1; | |
808 | break; | |
809 | case SMUX_SOUT: | |
810 | /* SMUX_SOUT message is now valied for us. */ | |
811 | if (debug_smux) | |
8ddca704 | 812 | zlog_debug ("SMUX_SOUT(%s)", rollback ? "rollback" : "commit"); |
718e3744 | 813 | |
814 | if (sout_save_len > 0) | |
815 | { | |
816 | smux_parse_set (sout_save_buff, sout_save_len, rollback ? FREE : COMMIT); | |
817 | sout_save_len = 0; | |
818 | } | |
819 | else | |
820 | zlog_warn ("SMUX_SOUT sout_save_len=%d - invalid", (int) sout_save_len); | |
821 | ||
822 | if (len_income > 3) | |
823 | { | |
824 | /* YYY: this strange code has to solve the "slow peer" | |
825 | problem: When agent sends SMUX_SOUT message it doesn't | |
826 | wait any responce and may send some next message to | |
827 | subagent. Then the peer in 'smux_read()' will recieve | |
828 | from socket the 'concatenated' buffer, contaning both | |
829 | SMUX_SOUT message and the next one | |
830 | (SMUX_GET/SMUX_GETNEXT/SMUX_GET). So we should check: if | |
831 | the buffer is longer than 3 ( length of SMUX_SOUT ), we | |
832 | must process the rest of it. This effect may be observed | |
833 | if 'debug_smux' is set to '1' */ | |
834 | ptr++; | |
835 | len = len_income - 3; | |
836 | goto process_rest; | |
837 | } | |
838 | break; | |
839 | case SMUX_GETRSP: | |
840 | /* SMUX_GETRSP message is invalid for us. */ | |
841 | zlog_warn ("SMUX_GETRSP received: resetting connection."); | |
842 | return -1; | |
843 | break; | |
844 | case SMUX_CLOSE: | |
845 | /* Close SMUX connection. */ | |
846 | if (debug_smux) | |
8ddca704 | 847 | zlog_debug ("SMUX_CLOSE"); |
718e3744 | 848 | smux_parse_close (ptr, len); |
849 | return -1; | |
850 | break; | |
851 | case SMUX_RRSP: | |
852 | /* This is response for register message. */ | |
853 | if (debug_smux) | |
8ddca704 | 854 | zlog_debug ("SMUX_RRSP"); |
718e3744 | 855 | smux_parse_rrsp (ptr, len); |
856 | break; | |
857 | case SMUX_GET: | |
858 | /* Exact request for object id. */ | |
859 | if (debug_smux) | |
8ddca704 | 860 | zlog_debug ("SMUX_GET"); |
718e3744 | 861 | smux_parse_get (ptr, len, 1); |
862 | break; | |
863 | case SMUX_GETNEXT: | |
864 | /* Next request for object id. */ | |
865 | if (debug_smux) | |
8ddca704 | 866 | zlog_debug ("SMUX_GETNEXT"); |
718e3744 | 867 | smux_parse_get (ptr, len, 0); |
868 | break; | |
869 | case SMUX_SET: | |
870 | /* SMUX_SET is supported with some limitations. */ | |
871 | if (debug_smux) | |
8ddca704 | 872 | zlog_debug ("SMUX_SET"); |
718e3744 | 873 | |
874 | /* save the data for future SMUX_SOUT */ | |
875 | memcpy (sout_save_buff, ptr, len); | |
876 | sout_save_len = len; | |
877 | smux_parse_set (ptr, len, RESERVE1); | |
878 | break; | |
879 | default: | |
880 | zlog_info ("Unknown type: %d", type); | |
881 | break; | |
882 | } | |
883 | return 0; | |
884 | } | |
885 | ||
886 | /* SMUX message read function. */ | |
887 | int | |
888 | smux_read (struct thread *t) | |
889 | { | |
890 | int sock; | |
891 | int len; | |
892 | u_char buf[SMUXMAXPKTSIZE]; | |
893 | int ret; | |
894 | ||
895 | /* Clear thread. */ | |
896 | sock = THREAD_FD (t); | |
897 | smux_read_thread = NULL; | |
898 | ||
899 | if (debug_smux) | |
8ddca704 | 900 | zlog_debug ("SMUX read start"); |
718e3744 | 901 | |
902 | /* Read message from SMUX socket. */ | |
903 | len = recv (sock, buf, SMUXMAXPKTSIZE, 0); | |
904 | ||
905 | if (len < 0) | |
906 | { | |
6099b3b5 | 907 | zlog_warn ("Can't read all SMUX packet: %s", safe_strerror (errno)); |
718e3744 | 908 | close (sock); |
909 | smux_sock = -1; | |
910 | smux_event (SMUX_CONNECT, 0); | |
911 | return -1; | |
912 | } | |
913 | ||
914 | if (len == 0) | |
915 | { | |
916 | zlog_warn ("SMUX connection closed: %d", sock); | |
917 | close (sock); | |
918 | smux_sock = -1; | |
919 | smux_event (SMUX_CONNECT, 0); | |
920 | return -1; | |
921 | } | |
922 | ||
923 | if (debug_smux) | |
8ddca704 | 924 | zlog_debug ("SMUX read len: %d", len); |
718e3744 | 925 | |
926 | /* Parse the message. */ | |
927 | ret = smux_parse (buf, len); | |
928 | ||
929 | if (ret < 0) | |
930 | { | |
931 | close (sock); | |
932 | smux_sock = -1; | |
933 | smux_event (SMUX_CONNECT, 0); | |
934 | return -1; | |
935 | } | |
936 | ||
937 | /* Regiser read thread. */ | |
938 | smux_event (SMUX_READ, sock); | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | int | |
944 | smux_open (int sock) | |
945 | { | |
946 | u_char buf[BUFSIZ]; | |
947 | u_char *ptr; | |
70e149e0 | 948 | size_t len; |
718e3744 | 949 | u_long version; |
42053f4e | 950 | u_char progname[] = QUAGGA_PROGNAME "-" QUAGGA_VERSION; |
718e3744 | 951 | |
952 | if (debug_smux) | |
953 | { | |
954 | smux_oid_dump ("SMUX open oid", smux_oid, smux_oid_len); | |
8ddca704 | 955 | zlog_debug ("SMUX open progname: %s", progname); |
956 | zlog_debug ("SMUX open password: %s", smux_passwd); | |
718e3744 | 957 | } |
958 | ||
959 | ptr = buf; | |
960 | len = BUFSIZ; | |
961 | ||
962 | /* SMUX Header. As placeholder. */ | |
963 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_OPEN, 0); | |
964 | ||
965 | /* SMUX Open. */ | |
966 | version = 0; | |
967 | ptr = asn_build_int (ptr, &len, | |
968 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
969 | &version, sizeof (u_long)); | |
970 | ||
971 | /* SMUX connection oid. */ | |
972 | ptr = asn_build_objid (ptr, &len, | |
973 | (u_char) | |
974 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
975 | smux_oid, smux_oid_len); | |
976 | ||
977 | /* SMUX connection description. */ | |
978 | ptr = asn_build_string (ptr, &len, | |
979 | (u_char) | |
980 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
981 | progname, strlen (progname)); | |
982 | ||
983 | /* SMUX connection password. */ | |
984 | ptr = asn_build_string (ptr, &len, | |
985 | (u_char) | |
986 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
987 | smux_passwd, strlen (smux_passwd)); | |
988 | ||
989 | /* Fill in real SMUX header. We exclude ASN header size (2). */ | |
990 | len = BUFSIZ; | |
991 | asn_build_header (buf, &len, (u_char) SMUX_OPEN, (ptr - buf) - 2); | |
992 | ||
993 | return send (sock, buf, (ptr - buf), 0); | |
994 | } | |
995 | ||
996 | int | |
997 | smux_trap (oid *name, size_t namelen, | |
998 | oid *iname, size_t inamelen, | |
999 | struct trap_object *trapobj, size_t trapobjlen, | |
020709f9 | 1000 | unsigned int tick, u_char sptrap) |
718e3744 | 1001 | { |
9035efaa | 1002 | unsigned int i; |
718e3744 | 1003 | u_char buf[BUFSIZ]; |
1004 | u_char *ptr; | |
70e149e0 | 1005 | size_t len, length; |
718e3744 | 1006 | struct in_addr addr; |
1007 | unsigned long val; | |
1008 | u_char *h1, *h1e; | |
1009 | ||
1010 | ptr = buf; | |
1011 | len = BUFSIZ; | |
1012 | length = len; | |
1013 | ||
1014 | /* When SMUX connection is not established. */ | |
1015 | if (smux_sock < 0) | |
1016 | return 0; | |
1017 | ||
1018 | /* SMUX header. */ | |
1019 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_TRAP, 0); | |
1020 | ||
1021 | /* Sub agent enterprise oid. */ | |
1022 | ptr = asn_build_objid (ptr, &len, | |
1023 | (u_char) | |
1024 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
1025 | smux_oid, smux_oid_len); | |
1026 | ||
1027 | /* IP address. */ | |
1028 | addr.s_addr = 0; | |
1029 | ptr = asn_build_string (ptr, &len, | |
1030 | (u_char) | |
1031 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_IPADDRESS), | |
1032 | (u_char *)&addr, sizeof (struct in_addr)); | |
1033 | ||
1034 | /* Generic trap integer. */ | |
1035 | val = SNMP_TRAP_ENTERPRISESPECIFIC; | |
1036 | ptr = asn_build_int (ptr, &len, | |
1037 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1038 | &val, sizeof (int)); | |
1039 | ||
1040 | /* Specific trap integer. */ | |
020709f9 | 1041 | val = sptrap; |
718e3744 | 1042 | ptr = asn_build_int (ptr, &len, |
1043 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1044 | &val, sizeof (int)); | |
1045 | ||
1046 | /* Timeticks timestamp. */ | |
1047 | val = 0; | |
1048 | ptr = asn_build_unsigned_int (ptr, &len, | |
1049 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_TIMETICKS), | |
1050 | &val, sizeof (int)); | |
1051 | ||
1052 | /* Variables. */ | |
1053 | h1 = ptr; | |
1054 | ptr = asn_build_sequence (ptr, &len, | |
1055 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
1056 | 0); | |
1057 | ||
1058 | ||
1059 | /* Iteration for each objects. */ | |
1060 | h1e = ptr; | |
1061 | for (i = 0; i < trapobjlen; i++) | |
1062 | { | |
1063 | int ret; | |
1064 | oid oid[MAX_OID_LEN]; | |
1065 | size_t oid_len; | |
1066 | void *val; | |
1067 | size_t val_len; | |
1068 | u_char val_type; | |
1069 | ||
1070 | /* Make OID. */ | |
1071 | oid_copy (oid, name, namelen); | |
1072 | oid_copy (oid + namelen, trapobj[i].name, trapobj[i].namelen); | |
1073 | oid_copy (oid + namelen + trapobj[i].namelen, iname, inamelen); | |
1074 | oid_len = namelen + trapobj[i].namelen + inamelen; | |
1075 | ||
1076 | if (debug_smux) | |
1077 | smux_oid_dump ("Trap", oid, oid_len); | |
1078 | ||
1079 | ret = smux_get (oid, &oid_len, 1, &val_type, &val, &val_len); | |
1080 | ||
1081 | if (debug_smux) | |
8ddca704 | 1082 | zlog_debug ("smux_get result %d", ret); |
718e3744 | 1083 | |
1084 | if (ret == 0) | |
1085 | ptr = snmp_build_var_op (ptr, oid, &oid_len, | |
1086 | val_type, val_len, val, &len); | |
1087 | } | |
1088 | ||
1089 | /* Now variable size is known, fill in size */ | |
1090 | asn_build_sequence(h1, &length, | |
1091 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
1092 | ptr - h1e); | |
1093 | ||
1094 | /* Fill in size of whole sequence */ | |
1095 | len = BUFSIZ; | |
1096 | asn_build_header (buf, &len, (u_char) SMUX_TRAP, (ptr - buf) - 2); | |
1097 | ||
1098 | return send (smux_sock, buf, (ptr - buf), 0); | |
1099 | } | |
1100 | ||
1101 | int | |
1102 | smux_register (int sock) | |
1103 | { | |
1104 | u_char buf[BUFSIZ]; | |
1105 | u_char *ptr; | |
70e149e0 | 1106 | int ret; |
1107 | size_t len; | |
718e3744 | 1108 | long priority; |
1109 | long operation; | |
1110 | struct subtree *subtree; | |
1111 | struct listnode *node; | |
1112 | ||
1113 | ret = 0; | |
1114 | ||
1115 | for (node = treelist->head; node; node = node->next) | |
1116 | { | |
1117 | ptr = buf; | |
1118 | len = BUFSIZ; | |
1119 | ||
1120 | subtree = node->data; | |
1121 | ||
1122 | /* SMUX RReq Header. */ | |
1123 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_RREQ, 0); | |
1124 | ||
1125 | /* Register MIB tree. */ | |
1126 | ptr = asn_build_objid (ptr, &len, | |
1127 | (u_char) | |
1128 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
1129 | subtree->name, subtree->name_len); | |
1130 | ||
1131 | /* Priority. */ | |
1132 | priority = -1; | |
1133 | ptr = asn_build_int (ptr, &len, | |
1134 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1135 | &priority, sizeof (u_long)); | |
1136 | ||
1137 | /* Operation. */ | |
1138 | operation = 2; /* Register R/W */ | |
1139 | ptr = asn_build_int (ptr, &len, | |
1140 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1141 | &operation, sizeof (u_long)); | |
1142 | ||
1143 | if (debug_smux) | |
1144 | { | |
1145 | smux_oid_dump ("SMUX register oid", subtree->name, subtree->name_len); | |
8ddca704 | 1146 | zlog_debug ("SMUX register priority: %ld", priority); |
1147 | zlog_debug ("SMUX register operation: %ld", operation); | |
718e3744 | 1148 | } |
1149 | ||
1150 | len = BUFSIZ; | |
1151 | asn_build_header (buf, &len, (u_char) SMUX_RREQ, (ptr - buf) - 2); | |
1152 | ret = send (sock, buf, (ptr - buf), 0); | |
1153 | if (ret < 0) | |
1154 | return ret; | |
1155 | } | |
1156 | return ret; | |
1157 | } | |
1158 | ||
1159 | /* Try to connect to SNMP agent. */ | |
1160 | int | |
1161 | smux_connect (struct thread *t) | |
1162 | { | |
1163 | int ret; | |
1164 | ||
1165 | if (debug_smux) | |
8ddca704 | 1166 | zlog_debug ("SMUX connect try %d", fail + 1); |
718e3744 | 1167 | |
1168 | /* Clear thread poner of myself. */ | |
1169 | smux_connect_thread = NULL; | |
1170 | ||
1171 | /* Make socket. Try to connect. */ | |
1172 | smux_sock = smux_socket (); | |
1173 | if (smux_sock < 0) | |
1174 | { | |
1175 | if (++fail < SMUX_MAX_FAILURE) | |
1176 | smux_event (SMUX_CONNECT, 0); | |
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | /* Send OPEN PDU. */ | |
1181 | ret = smux_open (smux_sock); | |
1182 | if (ret < 0) | |
1183 | { | |
6099b3b5 | 1184 | zlog_warn ("SMUX open message send failed: %s", safe_strerror (errno)); |
718e3744 | 1185 | close (smux_sock); |
1186 | smux_sock = -1; | |
1187 | if (++fail < SMUX_MAX_FAILURE) | |
1188 | smux_event (SMUX_CONNECT, 0); | |
1189 | return -1; | |
1190 | } | |
1191 | ||
1192 | /* Send any outstanding register PDUs. */ | |
1193 | ret = smux_register (smux_sock); | |
1194 | if (ret < 0) | |
1195 | { | |
6099b3b5 | 1196 | zlog_warn ("SMUX register message send failed: %s", safe_strerror (errno)); |
718e3744 | 1197 | close (smux_sock); |
1198 | smux_sock = -1; | |
1199 | if (++fail < SMUX_MAX_FAILURE) | |
1200 | smux_event (SMUX_CONNECT, 0); | |
1201 | return -1; | |
1202 | } | |
1203 | ||
1204 | /* Everything goes fine. */ | |
1205 | smux_event (SMUX_READ, smux_sock); | |
1206 | ||
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | /* Clear all SMUX related resources. */ | |
1211 | void | |
1212 | smux_stop () | |
1213 | { | |
1214 | if (smux_read_thread) | |
1215 | thread_cancel (smux_read_thread); | |
1216 | if (smux_connect_thread) | |
1217 | thread_cancel (smux_connect_thread); | |
1218 | ||
1219 | if (smux_sock >= 0) | |
1220 | { | |
1221 | close (smux_sock); | |
1222 | smux_sock = -1; | |
1223 | } | |
1224 | } | |
1225 | \f | |
dd488a78 | 1226 | |
718e3744 | 1227 | |
1228 | void | |
1229 | smux_event (enum smux_event event, int sock) | |
1230 | { | |
1231 | switch (event) | |
1232 | { | |
1233 | case SMUX_SCHEDULE: | |
1234 | smux_connect_thread = thread_add_event (master, smux_connect, NULL, 0); | |
1235 | break; | |
1236 | case SMUX_CONNECT: | |
1237 | smux_connect_thread = thread_add_timer (master, smux_connect, NULL, 10); | |
1238 | break; | |
1239 | case SMUX_READ: | |
1240 | smux_read_thread = thread_add_read (master, smux_read, NULL, sock); | |
1241 | break; | |
1242 | default: | |
1243 | break; | |
1244 | } | |
1245 | } | |
1246 | \f | |
1247 | int | |
9035efaa | 1248 | smux_str2oid (const char *str, oid *oid, size_t *oid_len) |
718e3744 | 1249 | { |
1250 | int len; | |
1251 | int val; | |
1252 | ||
1253 | len = 0; | |
1254 | val = 0; | |
1255 | *oid_len = 0; | |
1256 | ||
1257 | if (*str == '.') | |
1258 | str++; | |
1259 | if (*str == '\0') | |
1260 | return 0; | |
1261 | ||
1262 | while (1) | |
1263 | { | |
1264 | if (! isdigit (*str)) | |
1265 | return -1; | |
1266 | ||
1267 | while (isdigit (*str)) | |
1268 | { | |
1269 | val *= 10; | |
1270 | val += (*str - '0'); | |
1271 | str++; | |
1272 | } | |
1273 | ||
1274 | if (*str == '\0') | |
1275 | break; | |
1276 | if (*str != '.') | |
1277 | return -1; | |
1278 | ||
1279 | oid[len++] = val; | |
1280 | val = 0; | |
1281 | str++; | |
1282 | } | |
1283 | ||
1284 | oid[len++] = val; | |
1285 | *oid_len = len; | |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | oid * | |
1291 | smux_oid_dup (oid *objid, size_t objid_len) | |
1292 | { | |
1293 | oid *new; | |
1294 | ||
1295 | new = XMALLOC (MTYPE_TMP, sizeof (oid) * objid_len); | |
1296 | oid_copy (new, objid, objid_len); | |
1297 | ||
1298 | return new; | |
1299 | } | |
1300 | ||
1301 | int | |
9035efaa | 1302 | smux_peer_oid (struct vty *vty, const char *oid_str, const char *passwd_str) |
718e3744 | 1303 | { |
1304 | int ret; | |
1305 | oid oid[MAX_OID_LEN]; | |
1306 | size_t oid_len; | |
1307 | ||
1308 | ret = smux_str2oid (oid_str, oid, &oid_len); | |
1309 | if (ret != 0) | |
1310 | { | |
1311 | vty_out (vty, "object ID malformed%s", VTY_NEWLINE); | |
1312 | return CMD_WARNING; | |
1313 | } | |
1314 | ||
c75105ab | 1315 | if (smux_oid) |
1316 | { | |
1317 | free (smux_oid); | |
1318 | smux_oid = NULL; | |
1319 | } | |
718e3744 | 1320 | |
9035efaa | 1321 | /* careful, smux_passwd might point to string constant */ |
c75105ab | 1322 | if (smux_passwd) |
718e3744 | 1323 | { |
1324 | free (smux_passwd); | |
1325 | smux_passwd = NULL; | |
1326 | } | |
1327 | ||
1328 | smux_oid = smux_oid_dup (oid, oid_len); | |
1329 | smux_oid_len = oid_len; | |
1330 | ||
1331 | if (passwd_str) | |
1332 | smux_passwd = strdup (passwd_str); | |
c75105ab | 1333 | else |
1334 | smux_passwd = strdup (""); | |
718e3744 | 1335 | |
c75105ab | 1336 | return 0; |
718e3744 | 1337 | } |
1338 | ||
1339 | int | |
1340 | smux_header_generic (struct variable *v, oid *name, size_t *length, int exact, | |
1341 | size_t *var_len, WriteMethod **write_method) | |
1342 | { | |
1343 | oid fulloid[MAX_OID_LEN]; | |
1344 | int ret; | |
1345 | ||
1346 | oid_copy (fulloid, v->name, v->namelen); | |
1347 | fulloid[v->namelen] = 0; | |
1348 | /* Check against full instance. */ | |
1349 | ret = oid_compare (name, *length, fulloid, v->namelen + 1); | |
1350 | ||
1351 | /* Check single instance. */ | |
1352 | if ((exact && (ret != 0)) || (!exact && (ret >= 0))) | |
1353 | return MATCH_FAILED; | |
1354 | ||
1355 | /* In case of getnext, fill in full instance. */ | |
1356 | memcpy (name, fulloid, (v->namelen + 1) * sizeof (oid)); | |
1357 | *length = v->namelen + 1; | |
1358 | ||
1359 | *write_method = 0; | |
1360 | *var_len = sizeof(long); /* default to 'long' results */ | |
1361 | ||
1362 | return MATCH_SUCCEEDED; | |
1363 | } | |
1364 | ||
1365 | int | |
1366 | smux_peer_default () | |
1367 | { | |
c75105ab | 1368 | if (smux_oid) |
718e3744 | 1369 | { |
1370 | free (smux_oid); | |
c75105ab | 1371 | smux_oid = NULL; |
718e3744 | 1372 | } |
9035efaa | 1373 | |
1374 | /* careful, smux_passwd might be pointing at string constant */ | |
c75105ab | 1375 | if (smux_passwd) |
718e3744 | 1376 | { |
1377 | free (smux_passwd); | |
c75105ab | 1378 | smux_passwd = NULL; |
718e3744 | 1379 | } |
c75105ab | 1380 | |
718e3744 | 1381 | return CMD_SUCCESS; |
1382 | } | |
1383 | ||
1384 | DEFUN (smux_peer, | |
1385 | smux_peer_cmd, | |
1386 | "smux peer OID", | |
1387 | "SNMP MUX protocol settings\n" | |
1388 | "SNMP MUX peer settings\n" | |
1389 | "Object ID used in SMUX peering\n") | |
1390 | { | |
c75105ab | 1391 | if (smux_peer_oid (vty, argv[0], NULL) == 0) |
1392 | { | |
1393 | smux_start(); | |
1394 | return CMD_SUCCESS; | |
1395 | } | |
1396 | else | |
1397 | return CMD_WARNING; | |
718e3744 | 1398 | } |
1399 | ||
1400 | DEFUN (smux_peer_password, | |
1401 | smux_peer_password_cmd, | |
1402 | "smux peer OID PASSWORD", | |
1403 | "SNMP MUX protocol settings\n" | |
1404 | "SNMP MUX peer settings\n" | |
1405 | "SMUX peering object ID\n" | |
1406 | "SMUX peering password\n") | |
1407 | { | |
c75105ab | 1408 | if (smux_peer_oid (vty, argv[0], argv[1]) == 0) |
1409 | { | |
1410 | smux_start(); | |
1411 | return CMD_SUCCESS; | |
1412 | } | |
1413 | else | |
1414 | return CMD_WARNING; | |
718e3744 | 1415 | } |
1416 | ||
1417 | DEFUN (no_smux_peer, | |
1418 | no_smux_peer_cmd, | |
c75105ab | 1419 | "no smux peer", |
718e3744 | 1420 | NO_STR |
1421 | "SNMP MUX protocol settings\n" | |
c75105ab | 1422 | "SNMP MUX peer settings\n") |
718e3744 | 1423 | { |
c75105ab | 1424 | smux_stop(); |
718e3744 | 1425 | return smux_peer_default (); |
1426 | } | |
1427 | ||
c75105ab | 1428 | ALIAS (no_smux_peer, |
1429 | no_smux_peer_oid_cmd, | |
1430 | "no smux peer OID", | |
1431 | NO_STR | |
1432 | "SNMP MUX protocol settings\n" | |
1433 | "SNMP MUX peer settings\n" | |
1434 | "SMUX peering object ID\n") | |
1435 | ||
1436 | ALIAS (no_smux_peer, | |
1437 | no_smux_peer_oid_password_cmd, | |
718e3744 | 1438 | "no smux peer OID PASSWORD", |
1439 | NO_STR | |
1440 | "SNMP MUX protocol settings\n" | |
1441 | "SNMP MUX peer settings\n" | |
1442 | "SMUX peering object ID\n" | |
1443 | "SMUX peering password\n") | |
718e3744 | 1444 | |
1445 | int | |
1446 | config_write_smux (struct vty *vty) | |
1447 | { | |
1448 | int first = 1; | |
9035efaa | 1449 | unsigned int i; |
718e3744 | 1450 | |
c75105ab | 1451 | if (smux_oid) |
718e3744 | 1452 | { |
1453 | vty_out (vty, "smux peer "); | |
1454 | for (i = 0; i < smux_oid_len; i++) | |
1455 | { | |
1456 | vty_out (vty, "%s%d", first ? "" : ".", (int) smux_oid[i]); | |
1457 | first = 0; | |
1458 | } | |
1459 | vty_out (vty, " %s%s", smux_passwd, VTY_NEWLINE); | |
1460 | } | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /* Register subtree to smux master tree. */ | |
1465 | void | |
c9eca01b | 1466 | smux_register_mib (const char *descr, struct variable *var, |
1467 | size_t width, int num, | |
718e3744 | 1468 | oid name[], size_t namelen) |
1469 | { | |
1470 | struct subtree *tree; | |
1471 | ||
1472 | tree = (struct subtree *)malloc(sizeof(struct subtree)); | |
1473 | oid_copy (tree->name, name, namelen); | |
1474 | tree->name_len = namelen; | |
1475 | tree->variables = var; | |
1476 | tree->variables_num = num; | |
1477 | tree->variables_width = width; | |
1478 | tree->registered = 0; | |
1479 | listnode_add_sort(treelist, tree); | |
1480 | } | |
1481 | ||
1482 | void | |
1483 | smux_reset () | |
1484 | { | |
1485 | /* Setting configuration to default. */ | |
1486 | smux_peer_default (); | |
1487 | } | |
1488 | ||
1489 | /* Compare function to keep treelist sorted */ | |
1490 | static int | |
1491 | smux_tree_cmp(struct subtree *tree1, struct subtree *tree2) | |
1492 | { | |
1493 | return oid_compare(tree1->name, tree1->name_len, | |
1494 | tree2->name, tree2->name_len); | |
1495 | } | |
1496 | ||
1497 | /* Initialize some values then schedule first SMUX connection. */ | |
1498 | void | |
c75105ab | 1499 | smux_init (struct thread_master *tm) |
718e3744 | 1500 | { |
dd488a78 | 1501 | /* copy callers thread master */ |
1502 | master = tm; | |
718e3744 | 1503 | |
1504 | /* Make MIB tree. */ | |
1505 | treelist = list_new(); | |
1506 | treelist->cmp = (int (*)(void *, void *))smux_tree_cmp; | |
1507 | ||
1508 | /* Install commands. */ | |
1509 | install_node (&smux_node, config_write_smux); | |
1510 | ||
1511 | install_element (CONFIG_NODE, &smux_peer_cmd); | |
1512 | install_element (CONFIG_NODE, &smux_peer_password_cmd); | |
1513 | install_element (CONFIG_NODE, &no_smux_peer_cmd); | |
c75105ab | 1514 | install_element (CONFIG_NODE, &no_smux_peer_oid_cmd); |
1515 | install_element (CONFIG_NODE, &no_smux_peer_oid_password_cmd); | |
718e3744 | 1516 | } |
1517 | ||
1518 | void | |
1519 | smux_start(void) | |
1520 | { | |
1521 | /* Schedule first connection. */ | |
1522 | smux_event (SMUX_SCHEDULE, 0); | |
1523 | } | |
1524 | #endif /* HAVE_SNMP */ |