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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; | |
1eb8ef25 | 444 | struct listnode *node, *nnode; |
718e3744 | 445 | |
446 | /* Check */ | |
1eb8ef25 | 447 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 448 | { |
718e3744 | 449 | subresult = oid_compare_part (reqid, *reqid_len, |
450 | subtree->name, subtree->name_len); | |
451 | ||
452 | /* Subtree matched. */ | |
453 | if (subresult == 0) | |
454 | { | |
455 | /* Prepare suffix. */ | |
456 | suffix = reqid + subtree->name_len; | |
457 | suffix_len = *reqid_len - subtree->name_len; | |
458 | result = subresult; | |
459 | ||
460 | /* Check variables. */ | |
461 | for (j = 0; j < subtree->variables_num; j++) | |
462 | { | |
463 | v = &subtree->variables[j]; | |
464 | ||
465 | /* Always check suffix */ | |
466 | result = oid_compare_part (suffix, suffix_len, | |
467 | v->name, v->namelen); | |
468 | ||
469 | /* This is exact match so result must be zero. */ | |
470 | if (result == 0) | |
471 | { | |
472 | if (debug_smux) | |
8ddca704 | 473 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 474 | |
475 | statP = (*v->findVar) (v, suffix, &suffix_len, 1, | |
476 | &val_len, &write_method); | |
477 | ||
478 | if (write_method) | |
479 | { | |
480 | return (*write_method)(action, val, val_type, val_len, | |
481 | statP, suffix, suffix_len, v); | |
482 | } | |
483 | else | |
484 | { | |
485 | return SNMP_ERR_READONLY; | |
486 | } | |
487 | } | |
488 | ||
489 | /* If above execution is failed or oid is small (so | |
490 | there is no further match). */ | |
491 | if (result < 0) | |
492 | return SNMP_ERR_NOSUCHNAME; | |
493 | } | |
494 | } | |
495 | } | |
496 | return SNMP_ERR_NOSUCHNAME; | |
497 | } | |
498 | ||
499 | int | |
500 | smux_get (oid *reqid, size_t *reqid_len, int exact, | |
501 | u_char *val_type,void **val, size_t *val_len) | |
502 | { | |
503 | int j; | |
504 | struct subtree *subtree; | |
505 | struct variable *v; | |
506 | int subresult; | |
507 | oid *suffix; | |
70e149e0 | 508 | size_t suffix_len; |
718e3744 | 509 | int result; |
510 | WriteMethod *write_method=NULL; | |
1eb8ef25 | 511 | struct listnode *node, *nnode; |
718e3744 | 512 | |
513 | /* Check */ | |
1eb8ef25 | 514 | for (ALL_LIST_ELEMENTS (treelist, node, nnode,subtree)) |
718e3744 | 515 | { |
718e3744 | 516 | subresult = oid_compare_part (reqid, *reqid_len, |
517 | subtree->name, subtree->name_len); | |
518 | ||
519 | /* Subtree matched. */ | |
520 | if (subresult == 0) | |
521 | { | |
522 | /* Prepare suffix. */ | |
523 | suffix = reqid + subtree->name_len; | |
524 | suffix_len = *reqid_len - subtree->name_len; | |
525 | result = subresult; | |
526 | ||
527 | /* Check variables. */ | |
528 | for (j = 0; j < subtree->variables_num; j++) | |
529 | { | |
530 | v = &subtree->variables[j]; | |
531 | ||
532 | /* Always check suffix */ | |
533 | result = oid_compare_part (suffix, suffix_len, | |
534 | v->name, v->namelen); | |
535 | ||
536 | /* This is exact match so result must be zero. */ | |
537 | if (result == 0) | |
538 | { | |
539 | if (debug_smux) | |
8ddca704 | 540 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 541 | |
542 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
543 | val_len, &write_method); | |
544 | ||
545 | /* There is no instance. */ | |
546 | if (*val == NULL) | |
547 | return SNMP_NOSUCHINSTANCE; | |
548 | ||
549 | /* Call is suceed. */ | |
550 | *val_type = v->type; | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | /* If above execution is failed or oid is small (so | |
556 | there is no further match). */ | |
557 | if (result < 0) | |
558 | return SNMP_ERR_NOSUCHNAME; | |
559 | } | |
560 | } | |
561 | } | |
562 | return SNMP_ERR_NOSUCHNAME; | |
563 | } | |
564 | ||
565 | int | |
566 | smux_getnext (oid *reqid, size_t *reqid_len, int exact, | |
567 | u_char *val_type,void **val, size_t *val_len) | |
568 | { | |
569 | int j; | |
570 | oid save[MAX_OID_LEN]; | |
571 | int savelen = 0; | |
572 | struct subtree *subtree; | |
573 | struct variable *v; | |
574 | int subresult; | |
575 | oid *suffix; | |
70e149e0 | 576 | size_t suffix_len; |
718e3744 | 577 | int result; |
578 | WriteMethod *write_method=NULL; | |
1eb8ef25 | 579 | struct listnode *node, *nnode; |
718e3744 | 580 | |
581 | ||
582 | /* Save incoming request. */ | |
583 | oid_copy (save, reqid, *reqid_len); | |
584 | savelen = *reqid_len; | |
585 | ||
586 | /* Check */ | |
1eb8ef25 | 587 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 588 | { |
718e3744 | 589 | subresult = oid_compare_part (reqid, *reqid_len, |
590 | subtree->name, subtree->name_len); | |
591 | ||
592 | /* If request is in the tree. The agent has to make sure we | |
593 | only receive requests we have registered for. */ | |
594 | /* Unfortunately, that's not true. In fact, a SMUX subagent has to | |
595 | behave as if it manages the whole SNMP MIB tree itself. It's the | |
596 | duty of the master agent to collect the best answer and return it | |
597 | to the manager. See RFC 1227 chapter 3.1.6 for the glory details | |
598 | :-). ucd-snmp really behaves bad here as it actually might ask | |
599 | multiple times for the same GETNEXT request as it throws away the | |
600 | answer when it expects it in a different subtree and might come | |
601 | back later with the very same request. --jochen */ | |
602 | ||
603 | if (subresult <= 0) | |
604 | { | |
605 | /* Prepare suffix. */ | |
606 | suffix = reqid + subtree->name_len; | |
607 | suffix_len = *reqid_len - subtree->name_len; | |
608 | if (subresult < 0) | |
609 | { | |
610 | oid_copy(reqid, subtree->name, subtree->name_len); | |
611 | *reqid_len = subtree->name_len; | |
612 | } | |
613 | for (j = 0; j < subtree->variables_num; j++) | |
614 | { | |
615 | result = subresult; | |
616 | v = &subtree->variables[j]; | |
617 | ||
618 | /* Next then check result >= 0. */ | |
619 | if (result == 0) | |
620 | result = oid_compare_part (suffix, suffix_len, | |
621 | v->name, v->namelen); | |
622 | ||
623 | if (result <= 0) | |
624 | { | |
625 | if (debug_smux) | |
8ddca704 | 626 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 627 | if(result<0) |
628 | { | |
629 | oid_copy(suffix, v->name, v->namelen); | |
630 | suffix_len = v->namelen; | |
631 | } | |
632 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
633 | val_len, &write_method); | |
634 | *reqid_len = suffix_len + subtree->name_len; | |
635 | if (*val) | |
636 | { | |
637 | *val_type = v->type; | |
638 | return 0; | |
639 | } | |
640 | } | |
641 | } | |
642 | } | |
643 | } | |
644 | memcpy (reqid, save, savelen * sizeof(oid)); | |
645 | *reqid_len = savelen; | |
646 | ||
647 | return SNMP_ERR_NOSUCHNAME; | |
648 | } | |
649 | ||
650 | /* GET message header. */ | |
651 | char * | |
652 | smux_parse_get_header (char *ptr, size_t *len, long *reqid) | |
653 | { | |
654 | u_char type; | |
655 | long errstat; | |
656 | long errindex; | |
657 | ||
658 | /* Request ID. */ | |
659 | ptr = asn_parse_int (ptr, len, &type, reqid, sizeof (*reqid)); | |
660 | ||
661 | if (debug_smux) | |
8ddca704 | 662 | zlog_debug ("SMUX GET reqid: %d len: %d", (int) *reqid, (int) *len); |
718e3744 | 663 | |
664 | /* Error status. */ | |
665 | ptr = asn_parse_int (ptr, len, &type, &errstat, sizeof (errstat)); | |
666 | ||
667 | if (debug_smux) | |
8ddca704 | 668 | zlog_debug ("SMUX GET errstat %ld len: %ld", errstat, *len); |
718e3744 | 669 | |
670 | /* Error index. */ | |
671 | ptr = asn_parse_int (ptr, len, &type, &errindex, sizeof (errindex)); | |
672 | ||
673 | if (debug_smux) | |
8ddca704 | 674 | zlog_debug ("SMUX GET errindex %ld len: %ld", errindex, *len); |
718e3744 | 675 | |
676 | return ptr; | |
677 | } | |
678 | ||
679 | void | |
680 | smux_parse_set (char *ptr, size_t len, int action) | |
681 | { | |
682 | long reqid; | |
683 | oid oid[MAX_OID_LEN]; | |
684 | size_t oid_len; | |
685 | u_char val_type; | |
686 | void *val; | |
687 | size_t val_len; | |
688 | int ret; | |
689 | ||
690 | if (debug_smux) | |
8ddca704 | 691 | zlog_debug ("SMUX SET(%s) message parse: len %ld", |
718e3744 | 692 | (RESERVE1 == action) ? "RESERVE1" : ((FREE == action) ? "FREE" : "COMMIT"), |
693 | len); | |
694 | ||
695 | /* Parse SET message header. */ | |
696 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
697 | ||
698 | /* Parse SET message object ID. */ | |
699 | ptr = smux_var (ptr, len, oid, &oid_len, &val_len, &val_type, &val); | |
700 | ||
701 | ret = smux_set (oid, &oid_len, val_type, val, val_len, action); | |
702 | if (debug_smux) | |
8ddca704 | 703 | zlog_debug ("SMUX SET ret %d", ret); |
718e3744 | 704 | |
705 | /* Return result. */ | |
706 | if (RESERVE1 == action) | |
707 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
708 | } | |
709 | ||
710 | void | |
711 | smux_parse_get (char *ptr, size_t len, int exact) | |
712 | { | |
713 | long reqid; | |
714 | oid oid[MAX_OID_LEN]; | |
715 | size_t oid_len; | |
716 | u_char val_type; | |
717 | void *val; | |
718 | size_t val_len; | |
719 | int ret; | |
720 | ||
721 | if (debug_smux) | |
8ddca704 | 722 | zlog_debug ("SMUX GET message parse: len %ld", len); |
718e3744 | 723 | |
724 | /* Parse GET message header. */ | |
725 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
726 | ||
727 | /* Parse GET message object ID. We needn't the value come */ | |
728 | ptr = smux_var (ptr, len, oid, &oid_len, NULL, NULL, NULL); | |
729 | ||
730 | /* Traditional getstatptr. */ | |
731 | if (exact) | |
732 | ret = smux_get (oid, &oid_len, exact, &val_type, &val, &val_len); | |
733 | else | |
734 | ret = smux_getnext (oid, &oid_len, exact, &val_type, &val, &val_len); | |
735 | ||
736 | /* Return result. */ | |
737 | if (ret == 0) | |
738 | smux_getresp_send (oid, oid_len, reqid, 0, 0, val_type, val, val_len); | |
739 | else | |
740 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
741 | } | |
742 | ||
743 | /* Parse SMUX_CLOSE message. */ | |
744 | void | |
745 | smux_parse_close (char *ptr, int len) | |
746 | { | |
747 | long reason = 0; | |
748 | ||
749 | while (len--) | |
750 | { | |
751 | reason = (reason << 8) | (long) *ptr; | |
752 | ptr++; | |
753 | } | |
754 | zlog_info ("SMUX_CLOSE with reason: %ld", reason); | |
755 | } | |
756 | ||
757 | /* SMUX_RRSP message. */ | |
758 | void | |
70e149e0 | 759 | smux_parse_rrsp (char *ptr, size_t len) |
718e3744 | 760 | { |
761 | char val; | |
762 | long errstat; | |
763 | ||
764 | ptr = asn_parse_int (ptr, &len, &val, &errstat, sizeof (errstat)); | |
765 | ||
766 | if (debug_smux) | |
8ddca704 | 767 | zlog_debug ("SMUX_RRSP value: %d errstat: %ld", val, errstat); |
718e3744 | 768 | } |
769 | ||
770 | /* Parse SMUX message. */ | |
771 | int | |
70e149e0 | 772 | smux_parse (char *ptr, size_t len) |
718e3744 | 773 | { |
774 | /* This buffer we'll use for SOUT message. We could allocate it with | |
775 | malloc and save only static pointer/lenght, but IMHO static | |
776 | buffer is a faster solusion. */ | |
777 | static u_char sout_save_buff[SMUXMAXPKTSIZE]; | |
778 | static int sout_save_len = 0; | |
779 | ||
780 | int len_income = len; /* see note below: YYY */ | |
781 | u_char type; | |
782 | u_char rollback; | |
783 | ||
784 | rollback = ptr[2]; /* important only for SMUX_SOUT */ | |
785 | ||
786 | process_rest: /* see note below: YYY */ | |
787 | ||
788 | /* Parse SMUX message type and subsequent length. */ | |
789 | ptr = asn_parse_header (ptr, &len, &type); | |
790 | ||
791 | if (debug_smux) | |
8ddca704 | 792 | zlog_debug ("SMUX message received type: %d rest len: %ld", type, len); |
718e3744 | 793 | |
794 | switch (type) | |
795 | { | |
796 | case SMUX_OPEN: | |
797 | /* Open must be not send from SNMP agent. */ | |
798 | zlog_warn ("SMUX_OPEN received: resetting connection."); | |
799 | return -1; | |
800 | break; | |
801 | case SMUX_RREQ: | |
802 | /* SMUX_RREQ message is invalid for us. */ | |
803 | zlog_warn ("SMUX_RREQ received: resetting connection."); | |
804 | return -1; | |
805 | break; | |
806 | case SMUX_SOUT: | |
807 | /* SMUX_SOUT message is now valied for us. */ | |
808 | if (debug_smux) | |
8ddca704 | 809 | zlog_debug ("SMUX_SOUT(%s)", rollback ? "rollback" : "commit"); |
718e3744 | 810 | |
811 | if (sout_save_len > 0) | |
812 | { | |
813 | smux_parse_set (sout_save_buff, sout_save_len, rollback ? FREE : COMMIT); | |
814 | sout_save_len = 0; | |
815 | } | |
816 | else | |
817 | zlog_warn ("SMUX_SOUT sout_save_len=%d - invalid", (int) sout_save_len); | |
818 | ||
819 | if (len_income > 3) | |
820 | { | |
821 | /* YYY: this strange code has to solve the "slow peer" | |
822 | problem: When agent sends SMUX_SOUT message it doesn't | |
823 | wait any responce and may send some next message to | |
824 | subagent. Then the peer in 'smux_read()' will recieve | |
825 | from socket the 'concatenated' buffer, contaning both | |
826 | SMUX_SOUT message and the next one | |
827 | (SMUX_GET/SMUX_GETNEXT/SMUX_GET). So we should check: if | |
828 | the buffer is longer than 3 ( length of SMUX_SOUT ), we | |
829 | must process the rest of it. This effect may be observed | |
830 | if 'debug_smux' is set to '1' */ | |
831 | ptr++; | |
832 | len = len_income - 3; | |
833 | goto process_rest; | |
834 | } | |
835 | break; | |
836 | case SMUX_GETRSP: | |
837 | /* SMUX_GETRSP message is invalid for us. */ | |
838 | zlog_warn ("SMUX_GETRSP received: resetting connection."); | |
839 | return -1; | |
840 | break; | |
841 | case SMUX_CLOSE: | |
842 | /* Close SMUX connection. */ | |
843 | if (debug_smux) | |
8ddca704 | 844 | zlog_debug ("SMUX_CLOSE"); |
718e3744 | 845 | smux_parse_close (ptr, len); |
846 | return -1; | |
847 | break; | |
848 | case SMUX_RRSP: | |
849 | /* This is response for register message. */ | |
850 | if (debug_smux) | |
8ddca704 | 851 | zlog_debug ("SMUX_RRSP"); |
718e3744 | 852 | smux_parse_rrsp (ptr, len); |
853 | break; | |
854 | case SMUX_GET: | |
855 | /* Exact request for object id. */ | |
856 | if (debug_smux) | |
8ddca704 | 857 | zlog_debug ("SMUX_GET"); |
718e3744 | 858 | smux_parse_get (ptr, len, 1); |
859 | break; | |
860 | case SMUX_GETNEXT: | |
861 | /* Next request for object id. */ | |
862 | if (debug_smux) | |
8ddca704 | 863 | zlog_debug ("SMUX_GETNEXT"); |
718e3744 | 864 | smux_parse_get (ptr, len, 0); |
865 | break; | |
866 | case SMUX_SET: | |
867 | /* SMUX_SET is supported with some limitations. */ | |
868 | if (debug_smux) | |
8ddca704 | 869 | zlog_debug ("SMUX_SET"); |
718e3744 | 870 | |
871 | /* save the data for future SMUX_SOUT */ | |
872 | memcpy (sout_save_buff, ptr, len); | |
873 | sout_save_len = len; | |
874 | smux_parse_set (ptr, len, RESERVE1); | |
875 | break; | |
876 | default: | |
877 | zlog_info ("Unknown type: %d", type); | |
878 | break; | |
879 | } | |
880 | return 0; | |
881 | } | |
882 | ||
883 | /* SMUX message read function. */ | |
884 | int | |
885 | smux_read (struct thread *t) | |
886 | { | |
887 | int sock; | |
888 | int len; | |
889 | u_char buf[SMUXMAXPKTSIZE]; | |
890 | int ret; | |
891 | ||
892 | /* Clear thread. */ | |
893 | sock = THREAD_FD (t); | |
894 | smux_read_thread = NULL; | |
895 | ||
896 | if (debug_smux) | |
8ddca704 | 897 | zlog_debug ("SMUX read start"); |
718e3744 | 898 | |
899 | /* Read message from SMUX socket. */ | |
900 | len = recv (sock, buf, SMUXMAXPKTSIZE, 0); | |
901 | ||
902 | if (len < 0) | |
903 | { | |
6099b3b5 | 904 | zlog_warn ("Can't read all SMUX packet: %s", safe_strerror (errno)); |
718e3744 | 905 | close (sock); |
906 | smux_sock = -1; | |
907 | smux_event (SMUX_CONNECT, 0); | |
908 | return -1; | |
909 | } | |
910 | ||
911 | if (len == 0) | |
912 | { | |
913 | zlog_warn ("SMUX connection closed: %d", sock); | |
914 | close (sock); | |
915 | smux_sock = -1; | |
916 | smux_event (SMUX_CONNECT, 0); | |
917 | return -1; | |
918 | } | |
919 | ||
920 | if (debug_smux) | |
8ddca704 | 921 | zlog_debug ("SMUX read len: %d", len); |
718e3744 | 922 | |
923 | /* Parse the message. */ | |
924 | ret = smux_parse (buf, len); | |
925 | ||
926 | if (ret < 0) | |
927 | { | |
928 | close (sock); | |
929 | smux_sock = -1; | |
930 | smux_event (SMUX_CONNECT, 0); | |
931 | return -1; | |
932 | } | |
933 | ||
934 | /* Regiser read thread. */ | |
935 | smux_event (SMUX_READ, sock); | |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
940 | int | |
941 | smux_open (int sock) | |
942 | { | |
943 | u_char buf[BUFSIZ]; | |
944 | u_char *ptr; | |
70e149e0 | 945 | size_t len; |
718e3744 | 946 | u_long version; |
42053f4e | 947 | u_char progname[] = QUAGGA_PROGNAME "-" QUAGGA_VERSION; |
718e3744 | 948 | |
949 | if (debug_smux) | |
950 | { | |
951 | smux_oid_dump ("SMUX open oid", smux_oid, smux_oid_len); | |
8ddca704 | 952 | zlog_debug ("SMUX open progname: %s", progname); |
953 | zlog_debug ("SMUX open password: %s", smux_passwd); | |
718e3744 | 954 | } |
955 | ||
956 | ptr = buf; | |
957 | len = BUFSIZ; | |
958 | ||
959 | /* SMUX Header. As placeholder. */ | |
960 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_OPEN, 0); | |
961 | ||
962 | /* SMUX Open. */ | |
963 | version = 0; | |
964 | ptr = asn_build_int (ptr, &len, | |
965 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
966 | &version, sizeof (u_long)); | |
967 | ||
968 | /* SMUX connection oid. */ | |
969 | ptr = asn_build_objid (ptr, &len, | |
970 | (u_char) | |
971 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
972 | smux_oid, smux_oid_len); | |
973 | ||
974 | /* SMUX connection description. */ | |
975 | ptr = asn_build_string (ptr, &len, | |
976 | (u_char) | |
977 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
978 | progname, strlen (progname)); | |
979 | ||
980 | /* SMUX connection password. */ | |
981 | ptr = asn_build_string (ptr, &len, | |
982 | (u_char) | |
983 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
984 | smux_passwd, strlen (smux_passwd)); | |
985 | ||
986 | /* Fill in real SMUX header. We exclude ASN header size (2). */ | |
987 | len = BUFSIZ; | |
988 | asn_build_header (buf, &len, (u_char) SMUX_OPEN, (ptr - buf) - 2); | |
989 | ||
990 | return send (sock, buf, (ptr - buf), 0); | |
991 | } | |
992 | ||
993 | int | |
994 | smux_trap (oid *name, size_t namelen, | |
995 | oid *iname, size_t inamelen, | |
996 | struct trap_object *trapobj, size_t trapobjlen, | |
020709f9 | 997 | unsigned int tick, u_char sptrap) |
718e3744 | 998 | { |
9035efaa | 999 | unsigned int i; |
718e3744 | 1000 | u_char buf[BUFSIZ]; |
1001 | u_char *ptr; | |
70e149e0 | 1002 | size_t len, length; |
718e3744 | 1003 | struct in_addr addr; |
1004 | unsigned long val; | |
1005 | u_char *h1, *h1e; | |
1006 | ||
1007 | ptr = buf; | |
1008 | len = BUFSIZ; | |
1009 | length = len; | |
1010 | ||
1011 | /* When SMUX connection is not established. */ | |
1012 | if (smux_sock < 0) | |
1013 | return 0; | |
1014 | ||
1015 | /* SMUX header. */ | |
1016 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_TRAP, 0); | |
1017 | ||
1018 | /* Sub agent enterprise oid. */ | |
1019 | ptr = asn_build_objid (ptr, &len, | |
1020 | (u_char) | |
1021 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
1022 | smux_oid, smux_oid_len); | |
1023 | ||
1024 | /* IP address. */ | |
1025 | addr.s_addr = 0; | |
1026 | ptr = asn_build_string (ptr, &len, | |
1027 | (u_char) | |
1028 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_IPADDRESS), | |
1029 | (u_char *)&addr, sizeof (struct in_addr)); | |
1030 | ||
1031 | /* Generic trap integer. */ | |
1032 | val = SNMP_TRAP_ENTERPRISESPECIFIC; | |
1033 | ptr = asn_build_int (ptr, &len, | |
1034 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1035 | &val, sizeof (int)); | |
1036 | ||
1037 | /* Specific trap integer. */ | |
020709f9 | 1038 | val = sptrap; |
718e3744 | 1039 | ptr = asn_build_int (ptr, &len, |
1040 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1041 | &val, sizeof (int)); | |
1042 | ||
1043 | /* Timeticks timestamp. */ | |
1044 | val = 0; | |
1045 | ptr = asn_build_unsigned_int (ptr, &len, | |
1046 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_TIMETICKS), | |
1047 | &val, sizeof (int)); | |
1048 | ||
1049 | /* Variables. */ | |
1050 | h1 = ptr; | |
1051 | ptr = asn_build_sequence (ptr, &len, | |
1052 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
1053 | 0); | |
1054 | ||
1055 | ||
1056 | /* Iteration for each objects. */ | |
1057 | h1e = ptr; | |
1058 | for (i = 0; i < trapobjlen; i++) | |
1059 | { | |
1060 | int ret; | |
1061 | oid oid[MAX_OID_LEN]; | |
1062 | size_t oid_len; | |
1063 | void *val; | |
1064 | size_t val_len; | |
1065 | u_char val_type; | |
1066 | ||
1067 | /* Make OID. */ | |
1068 | oid_copy (oid, name, namelen); | |
1069 | oid_copy (oid + namelen, trapobj[i].name, trapobj[i].namelen); | |
1070 | oid_copy (oid + namelen + trapobj[i].namelen, iname, inamelen); | |
1071 | oid_len = namelen + trapobj[i].namelen + inamelen; | |
1072 | ||
1073 | if (debug_smux) | |
1074 | smux_oid_dump ("Trap", oid, oid_len); | |
1075 | ||
1076 | ret = smux_get (oid, &oid_len, 1, &val_type, &val, &val_len); | |
1077 | ||
1078 | if (debug_smux) | |
8ddca704 | 1079 | zlog_debug ("smux_get result %d", ret); |
718e3744 | 1080 | |
1081 | if (ret == 0) | |
1082 | ptr = snmp_build_var_op (ptr, oid, &oid_len, | |
1083 | val_type, val_len, val, &len); | |
1084 | } | |
1085 | ||
1086 | /* Now variable size is known, fill in size */ | |
1087 | asn_build_sequence(h1, &length, | |
1088 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
1089 | ptr - h1e); | |
1090 | ||
1091 | /* Fill in size of whole sequence */ | |
1092 | len = BUFSIZ; | |
1093 | asn_build_header (buf, &len, (u_char) SMUX_TRAP, (ptr - buf) - 2); | |
1094 | ||
1095 | return send (smux_sock, buf, (ptr - buf), 0); | |
1096 | } | |
1097 | ||
1098 | int | |
1099 | smux_register (int sock) | |
1100 | { | |
1101 | u_char buf[BUFSIZ]; | |
1102 | u_char *ptr; | |
70e149e0 | 1103 | int ret; |
1104 | size_t len; | |
718e3744 | 1105 | long priority; |
1106 | long operation; | |
1107 | struct subtree *subtree; | |
1eb8ef25 | 1108 | struct listnode *node, *nnode; |
718e3744 | 1109 | |
1110 | ret = 0; | |
1111 | ||
1eb8ef25 | 1112 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 1113 | { |
1114 | ptr = buf; | |
1115 | len = BUFSIZ; | |
1116 | ||
718e3744 | 1117 | /* SMUX RReq Header. */ |
1118 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_RREQ, 0); | |
1119 | ||
1120 | /* Register MIB tree. */ | |
1121 | ptr = asn_build_objid (ptr, &len, | |
1122 | (u_char) | |
1123 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
1124 | subtree->name, subtree->name_len); | |
1125 | ||
1126 | /* Priority. */ | |
1127 | priority = -1; | |
1128 | ptr = asn_build_int (ptr, &len, | |
1129 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1130 | &priority, sizeof (u_long)); | |
1131 | ||
1132 | /* Operation. */ | |
1133 | operation = 2; /* Register R/W */ | |
1134 | ptr = asn_build_int (ptr, &len, | |
1135 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
1136 | &operation, sizeof (u_long)); | |
1137 | ||
1138 | if (debug_smux) | |
1139 | { | |
1140 | smux_oid_dump ("SMUX register oid", subtree->name, subtree->name_len); | |
8ddca704 | 1141 | zlog_debug ("SMUX register priority: %ld", priority); |
1142 | zlog_debug ("SMUX register operation: %ld", operation); | |
718e3744 | 1143 | } |
1144 | ||
1145 | len = BUFSIZ; | |
1146 | asn_build_header (buf, &len, (u_char) SMUX_RREQ, (ptr - buf) - 2); | |
1147 | ret = send (sock, buf, (ptr - buf), 0); | |
1148 | if (ret < 0) | |
1149 | return ret; | |
1150 | } | |
1151 | return ret; | |
1152 | } | |
1153 | ||
1154 | /* Try to connect to SNMP agent. */ | |
1155 | int | |
1156 | smux_connect (struct thread *t) | |
1157 | { | |
1158 | int ret; | |
1159 | ||
1160 | if (debug_smux) | |
8ddca704 | 1161 | zlog_debug ("SMUX connect try %d", fail + 1); |
718e3744 | 1162 | |
1163 | /* Clear thread poner of myself. */ | |
1164 | smux_connect_thread = NULL; | |
1165 | ||
1166 | /* Make socket. Try to connect. */ | |
1167 | smux_sock = smux_socket (); | |
1168 | if (smux_sock < 0) | |
1169 | { | |
1170 | if (++fail < SMUX_MAX_FAILURE) | |
1171 | smux_event (SMUX_CONNECT, 0); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | /* Send OPEN PDU. */ | |
1176 | ret = smux_open (smux_sock); | |
1177 | if (ret < 0) | |
1178 | { | |
6099b3b5 | 1179 | zlog_warn ("SMUX open message send failed: %s", safe_strerror (errno)); |
718e3744 | 1180 | close (smux_sock); |
1181 | smux_sock = -1; | |
1182 | if (++fail < SMUX_MAX_FAILURE) | |
1183 | smux_event (SMUX_CONNECT, 0); | |
1184 | return -1; | |
1185 | } | |
1186 | ||
1187 | /* Send any outstanding register PDUs. */ | |
1188 | ret = smux_register (smux_sock); | |
1189 | if (ret < 0) | |
1190 | { | |
6099b3b5 | 1191 | zlog_warn ("SMUX register message send failed: %s", safe_strerror (errno)); |
718e3744 | 1192 | close (smux_sock); |
1193 | smux_sock = -1; | |
1194 | if (++fail < SMUX_MAX_FAILURE) | |
1195 | smux_event (SMUX_CONNECT, 0); | |
1196 | return -1; | |
1197 | } | |
1198 | ||
1199 | /* Everything goes fine. */ | |
1200 | smux_event (SMUX_READ, smux_sock); | |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | /* Clear all SMUX related resources. */ | |
1206 | void | |
1207 | smux_stop () | |
1208 | { | |
1209 | if (smux_read_thread) | |
1210 | thread_cancel (smux_read_thread); | |
1211 | if (smux_connect_thread) | |
1212 | thread_cancel (smux_connect_thread); | |
1213 | ||
1214 | if (smux_sock >= 0) | |
1215 | { | |
1216 | close (smux_sock); | |
1217 | smux_sock = -1; | |
1218 | } | |
1219 | } | |
1220 | \f | |
dd488a78 | 1221 | |
718e3744 | 1222 | |
1223 | void | |
1224 | smux_event (enum smux_event event, int sock) | |
1225 | { | |
1226 | switch (event) | |
1227 | { | |
1228 | case SMUX_SCHEDULE: | |
1229 | smux_connect_thread = thread_add_event (master, smux_connect, NULL, 0); | |
1230 | break; | |
1231 | case SMUX_CONNECT: | |
1232 | smux_connect_thread = thread_add_timer (master, smux_connect, NULL, 10); | |
1233 | break; | |
1234 | case SMUX_READ: | |
1235 | smux_read_thread = thread_add_read (master, smux_read, NULL, sock); | |
1236 | break; | |
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | } | |
1241 | \f | |
1242 | int | |
9035efaa | 1243 | smux_str2oid (const char *str, oid *oid, size_t *oid_len) |
718e3744 | 1244 | { |
1245 | int len; | |
1246 | int val; | |
1247 | ||
1248 | len = 0; | |
1249 | val = 0; | |
1250 | *oid_len = 0; | |
1251 | ||
1252 | if (*str == '.') | |
1253 | str++; | |
1254 | if (*str == '\0') | |
1255 | return 0; | |
1256 | ||
1257 | while (1) | |
1258 | { | |
1259 | if (! isdigit (*str)) | |
1260 | return -1; | |
1261 | ||
1262 | while (isdigit (*str)) | |
1263 | { | |
1264 | val *= 10; | |
1265 | val += (*str - '0'); | |
1266 | str++; | |
1267 | } | |
1268 | ||
1269 | if (*str == '\0') | |
1270 | break; | |
1271 | if (*str != '.') | |
1272 | return -1; | |
1273 | ||
1274 | oid[len++] = val; | |
1275 | val = 0; | |
1276 | str++; | |
1277 | } | |
1278 | ||
1279 | oid[len++] = val; | |
1280 | *oid_len = len; | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | oid * | |
1286 | smux_oid_dup (oid *objid, size_t objid_len) | |
1287 | { | |
1288 | oid *new; | |
1289 | ||
1290 | new = XMALLOC (MTYPE_TMP, sizeof (oid) * objid_len); | |
1291 | oid_copy (new, objid, objid_len); | |
1292 | ||
1293 | return new; | |
1294 | } | |
1295 | ||
1296 | int | |
9035efaa | 1297 | smux_peer_oid (struct vty *vty, const char *oid_str, const char *passwd_str) |
718e3744 | 1298 | { |
1299 | int ret; | |
1300 | oid oid[MAX_OID_LEN]; | |
1301 | size_t oid_len; | |
1302 | ||
1303 | ret = smux_str2oid (oid_str, oid, &oid_len); | |
1304 | if (ret != 0) | |
1305 | { | |
1306 | vty_out (vty, "object ID malformed%s", VTY_NEWLINE); | |
1307 | return CMD_WARNING; | |
1308 | } | |
1309 | ||
c75105ab | 1310 | if (smux_oid) |
1311 | { | |
1312 | free (smux_oid); | |
1313 | smux_oid = NULL; | |
1314 | } | |
718e3744 | 1315 | |
9035efaa | 1316 | /* careful, smux_passwd might point to string constant */ |
c75105ab | 1317 | if (smux_passwd) |
718e3744 | 1318 | { |
1319 | free (smux_passwd); | |
1320 | smux_passwd = NULL; | |
1321 | } | |
1322 | ||
1323 | smux_oid = smux_oid_dup (oid, oid_len); | |
1324 | smux_oid_len = oid_len; | |
1325 | ||
1326 | if (passwd_str) | |
1327 | smux_passwd = strdup (passwd_str); | |
c75105ab | 1328 | else |
1329 | smux_passwd = strdup (""); | |
718e3744 | 1330 | |
c75105ab | 1331 | return 0; |
718e3744 | 1332 | } |
1333 | ||
1334 | int | |
1335 | smux_header_generic (struct variable *v, oid *name, size_t *length, int exact, | |
1336 | size_t *var_len, WriteMethod **write_method) | |
1337 | { | |
1338 | oid fulloid[MAX_OID_LEN]; | |
1339 | int ret; | |
1340 | ||
1341 | oid_copy (fulloid, v->name, v->namelen); | |
1342 | fulloid[v->namelen] = 0; | |
1343 | /* Check against full instance. */ | |
1344 | ret = oid_compare (name, *length, fulloid, v->namelen + 1); | |
1345 | ||
1346 | /* Check single instance. */ | |
1347 | if ((exact && (ret != 0)) || (!exact && (ret >= 0))) | |
1348 | return MATCH_FAILED; | |
1349 | ||
1350 | /* In case of getnext, fill in full instance. */ | |
1351 | memcpy (name, fulloid, (v->namelen + 1) * sizeof (oid)); | |
1352 | *length = v->namelen + 1; | |
1353 | ||
1354 | *write_method = 0; | |
1355 | *var_len = sizeof(long); /* default to 'long' results */ | |
1356 | ||
1357 | return MATCH_SUCCEEDED; | |
1358 | } | |
1359 | ||
1360 | int | |
1361 | smux_peer_default () | |
1362 | { | |
c75105ab | 1363 | if (smux_oid) |
718e3744 | 1364 | { |
1365 | free (smux_oid); | |
c75105ab | 1366 | smux_oid = NULL; |
718e3744 | 1367 | } |
9035efaa | 1368 | |
1369 | /* careful, smux_passwd might be pointing at string constant */ | |
c75105ab | 1370 | if (smux_passwd) |
718e3744 | 1371 | { |
1372 | free (smux_passwd); | |
c75105ab | 1373 | smux_passwd = NULL; |
718e3744 | 1374 | } |
c75105ab | 1375 | |
718e3744 | 1376 | return CMD_SUCCESS; |
1377 | } | |
1378 | ||
1379 | DEFUN (smux_peer, | |
1380 | smux_peer_cmd, | |
1381 | "smux peer OID", | |
1382 | "SNMP MUX protocol settings\n" | |
1383 | "SNMP MUX peer settings\n" | |
1384 | "Object ID used in SMUX peering\n") | |
1385 | { | |
c75105ab | 1386 | if (smux_peer_oid (vty, argv[0], NULL) == 0) |
1387 | { | |
1388 | smux_start(); | |
1389 | return CMD_SUCCESS; | |
1390 | } | |
1391 | else | |
1392 | return CMD_WARNING; | |
718e3744 | 1393 | } |
1394 | ||
1395 | DEFUN (smux_peer_password, | |
1396 | smux_peer_password_cmd, | |
1397 | "smux peer OID PASSWORD", | |
1398 | "SNMP MUX protocol settings\n" | |
1399 | "SNMP MUX peer settings\n" | |
1400 | "SMUX peering object ID\n" | |
1401 | "SMUX peering password\n") | |
1402 | { | |
c75105ab | 1403 | if (smux_peer_oid (vty, argv[0], argv[1]) == 0) |
1404 | { | |
1405 | smux_start(); | |
1406 | return CMD_SUCCESS; | |
1407 | } | |
1408 | else | |
1409 | return CMD_WARNING; | |
718e3744 | 1410 | } |
1411 | ||
1412 | DEFUN (no_smux_peer, | |
1413 | no_smux_peer_cmd, | |
c75105ab | 1414 | "no smux peer", |
718e3744 | 1415 | NO_STR |
1416 | "SNMP MUX protocol settings\n" | |
c75105ab | 1417 | "SNMP MUX peer settings\n") |
718e3744 | 1418 | { |
c75105ab | 1419 | smux_stop(); |
718e3744 | 1420 | return smux_peer_default (); |
1421 | } | |
1422 | ||
c75105ab | 1423 | ALIAS (no_smux_peer, |
1424 | no_smux_peer_oid_cmd, | |
1425 | "no smux peer OID", | |
1426 | NO_STR | |
1427 | "SNMP MUX protocol settings\n" | |
1428 | "SNMP MUX peer settings\n" | |
1429 | "SMUX peering object ID\n") | |
1430 | ||
1431 | ALIAS (no_smux_peer, | |
1432 | no_smux_peer_oid_password_cmd, | |
718e3744 | 1433 | "no smux peer OID PASSWORD", |
1434 | NO_STR | |
1435 | "SNMP MUX protocol settings\n" | |
1436 | "SNMP MUX peer settings\n" | |
1437 | "SMUX peering object ID\n" | |
1438 | "SMUX peering password\n") | |
718e3744 | 1439 | |
1440 | int | |
1441 | config_write_smux (struct vty *vty) | |
1442 | { | |
1443 | int first = 1; | |
9035efaa | 1444 | unsigned int i; |
718e3744 | 1445 | |
c75105ab | 1446 | if (smux_oid) |
718e3744 | 1447 | { |
1448 | vty_out (vty, "smux peer "); | |
1449 | for (i = 0; i < smux_oid_len; i++) | |
1450 | { | |
1451 | vty_out (vty, "%s%d", first ? "" : ".", (int) smux_oid[i]); | |
1452 | first = 0; | |
1453 | } | |
1454 | vty_out (vty, " %s%s", smux_passwd, VTY_NEWLINE); | |
1455 | } | |
1456 | return 0; | |
1457 | } | |
1458 | ||
1459 | /* Register subtree to smux master tree. */ | |
1460 | void | |
c9eca01b | 1461 | smux_register_mib (const char *descr, struct variable *var, |
1462 | size_t width, int num, | |
718e3744 | 1463 | oid name[], size_t namelen) |
1464 | { | |
1465 | struct subtree *tree; | |
1466 | ||
1467 | tree = (struct subtree *)malloc(sizeof(struct subtree)); | |
1468 | oid_copy (tree->name, name, namelen); | |
1469 | tree->name_len = namelen; | |
1470 | tree->variables = var; | |
1471 | tree->variables_num = num; | |
1472 | tree->variables_width = width; | |
1473 | tree->registered = 0; | |
1474 | listnode_add_sort(treelist, tree); | |
1475 | } | |
1476 | ||
1477 | void | |
1478 | smux_reset () | |
1479 | { | |
1480 | /* Setting configuration to default. */ | |
1481 | smux_peer_default (); | |
1482 | } | |
1483 | ||
1484 | /* Compare function to keep treelist sorted */ | |
1485 | static int | |
1486 | smux_tree_cmp(struct subtree *tree1, struct subtree *tree2) | |
1487 | { | |
1488 | return oid_compare(tree1->name, tree1->name_len, | |
1489 | tree2->name, tree2->name_len); | |
1490 | } | |
1491 | ||
1492 | /* Initialize some values then schedule first SMUX connection. */ | |
1493 | void | |
c75105ab | 1494 | smux_init (struct thread_master *tm) |
718e3744 | 1495 | { |
dd488a78 | 1496 | /* copy callers thread master */ |
1497 | master = tm; | |
718e3744 | 1498 | |
1499 | /* Make MIB tree. */ | |
1500 | treelist = list_new(); | |
1501 | treelist->cmp = (int (*)(void *, void *))smux_tree_cmp; | |
1502 | ||
1503 | /* Install commands. */ | |
1504 | install_node (&smux_node, config_write_smux); | |
1505 | ||
1506 | install_element (CONFIG_NODE, &smux_peer_cmd); | |
1507 | install_element (CONFIG_NODE, &smux_peer_password_cmd); | |
1508 | install_element (CONFIG_NODE, &no_smux_peer_cmd); | |
c75105ab | 1509 | install_element (CONFIG_NODE, &no_smux_peer_oid_cmd); |
1510 | install_element (CONFIG_NODE, &no_smux_peer_oid_password_cmd); | |
718e3744 | 1511 | } |
1512 | ||
1513 | void | |
1514 | smux_start(void) | |
1515 | { | |
1516 | /* Schedule first connection. */ | |
1517 | smux_event (SMUX_SCHEDULE, 0); | |
1518 | } | |
1519 | #endif /* HAVE_SNMP */ |