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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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
5986b66b | 23 | #ifdef SNMP_SMUX |
07661cb5 | 24 | #include <net-snmp/net-snmp-config.h> |
fb62a3ce | 25 | #include <net-snmp/net-snmp-includes.h> |
718e3744 | 26 | |
718e3744 | 27 | #include "log.h" |
28 | #include "thread.h" | |
29 | #include "linklist.h" | |
30 | #include "command.h" | |
5e4fa164 | 31 | #include <lib/version.h> |
718e3744 | 32 | #include "memory.h" |
33 | #include "sockunion.h" | |
dd488a78 | 34 | #include "smux.h" |
718e3744 | 35 | |
3a4c9688 VB |
36 | #define SMUX_PORT_DEFAULT 199 |
37 | ||
38 | #define SMUXMAXPKTSIZE 1500 | |
39 | #define SMUXMAXSTRLEN 256 | |
40 | ||
41 | #define SMUX_OPEN (ASN_APPLICATION | ASN_CONSTRUCTOR | 0) | |
42 | #define SMUX_CLOSE (ASN_APPLICATION | ASN_PRIMITIVE | 1) | |
43 | #define SMUX_RREQ (ASN_APPLICATION | ASN_CONSTRUCTOR | 2) | |
44 | #define SMUX_RRSP (ASN_APPLICATION | ASN_PRIMITIVE | 3) | |
45 | #define SMUX_SOUT (ASN_APPLICATION | ASN_PRIMITIVE | 4) | |
46 | ||
47 | #define SMUX_GET (ASN_CONTEXT | ASN_CONSTRUCTOR | 0) | |
48 | #define SMUX_GETNEXT (ASN_CONTEXT | ASN_CONSTRUCTOR | 1) | |
49 | #define SMUX_GETRSP (ASN_CONTEXT | ASN_CONSTRUCTOR | 2) | |
50 | #define SMUX_SET (ASN_CONTEXT | ASN_CONSTRUCTOR | 3) | |
51 | #define SMUX_TRAP (ASN_CONTEXT | ASN_CONSTRUCTOR | 4) | |
52 | ||
53 | #define SMUX_MAX_FAILURE 3 | |
54 | ||
55 | /* SNMP tree. */ | |
56 | struct subtree | |
57 | { | |
58 | /* Tree's oid. */ | |
59 | oid name[MAX_OID_LEN]; | |
60 | u_char name_len; | |
61 | ||
62 | /* List of the variables. */ | |
63 | struct variable *variables; | |
64 | ||
65 | /* Length of the variables list. */ | |
66 | int variables_num; | |
67 | ||
68 | /* Width of the variables list. */ | |
69 | int variables_width; | |
70 | ||
71 | /* Registered flag. */ | |
72 | int registered; | |
73 | }; | |
74 | ||
718e3744 | 75 | #define min(A,B) ((A) < (B) ? (A) : (B)) |
76 | ||
77 | enum smux_event {SMUX_SCHEDULE, SMUX_CONNECT, SMUX_READ}; | |
78 | ||
79 | void smux_event (enum smux_event, int); | |
6b0655a2 | 80 | |
718e3744 | 81 | |
82 | /* SMUX socket. */ | |
83 | int smux_sock = -1; | |
84 | ||
85 | /* SMUX subtree list. */ | |
86 | struct list *treelist; | |
87 | ||
88 | /* SMUX oid. */ | |
c75105ab | 89 | oid *smux_oid = NULL; |
718e3744 | 90 | size_t smux_oid_len; |
91 | ||
718e3744 | 92 | /* SMUX password. */ |
c75105ab | 93 | char *smux_passwd = NULL; |
718e3744 | 94 | |
95 | /* SMUX read threads. */ | |
96 | struct thread *smux_read_thread; | |
97 | ||
98 | /* SMUX connect thrads. */ | |
99 | struct thread *smux_connect_thread; | |
100 | ||
101 | /* SMUX debug flag. */ | |
102 | int debug_smux = 0; | |
103 | ||
104 | /* SMUX failure count. */ | |
105 | int fail = 0; | |
106 | ||
107 | /* SMUX node. */ | |
7fc626de | 108 | static struct cmd_node smux_node = |
718e3744 | 109 | { |
110 | SMUX_NODE, | |
111 | "" /* SMUX has no interface. */ | |
112 | }; | |
dd488a78 | 113 | |
114 | /* thread master */ | |
79159516 | 115 | static struct thread_master *smux_master; |
6b0655a2 | 116 | |
0be8dfb2 | 117 | static int |
718e3744 | 118 | oid_compare_part (oid *o1, int o1_len, oid *o2, int o2_len) |
119 | { | |
120 | int i; | |
121 | ||
122 | for (i = 0; i < min (o1_len, o2_len); i++) | |
123 | { | |
124 | if (o1[i] < o2[i]) | |
125 | return -1; | |
126 | else if (o1[i] > o2[i]) | |
127 | return 1; | |
128 | } | |
129 | if (o1_len < o2_len) | |
130 | return -1; | |
131 | ||
132 | return 0; | |
133 | } | |
6b0655a2 | 134 | |
0be8dfb2 | 135 | static void |
65d3fbb4 | 136 | smux_oid_dump (const char *prefix, const oid *oid, size_t oid_len) |
718e3744 | 137 | { |
9035efaa | 138 | unsigned int i; |
718e3744 | 139 | int first = 1; |
140 | char buf[MAX_OID_LEN * 3]; | |
141 | ||
142 | buf[0] = '\0'; | |
143 | ||
144 | for (i = 0; i < oid_len; i++) | |
145 | { | |
146 | sprintf (buf + strlen (buf), "%s%d", first ? "" : ".", (int) oid[i]); | |
147 | first = 0; | |
148 | } | |
8ddca704 | 149 | zlog_debug ("%s: %s", prefix, buf); |
718e3744 | 150 | } |
151 | ||
0be8dfb2 | 152 | static int |
65d3fbb4 | 153 | smux_socket (void) |
718e3744 | 154 | { |
155 | int ret; | |
718e3744 | 156 | struct addrinfo hints, *res0, *res; |
157 | int gai; | |
718e3744 | 158 | int sock = 0; |
159 | ||
718e3744 | 160 | memset(&hints, 0, sizeof(hints)); |
161 | hints.ai_family = PF_UNSPEC; | |
162 | hints.ai_socktype = SOCK_STREAM; | |
163 | gai = getaddrinfo(NULL, "smux", &hints, &res0); | |
164 | if (gai == EAI_SERVICE) | |
165 | { | |
166 | char servbuf[NI_MAXSERV]; | |
167 | sprintf(servbuf,"%d",SMUX_PORT_DEFAULT); | |
168 | servbuf[sizeof (servbuf) - 1] = '\0'; | |
169 | gai = getaddrinfo(NULL, servbuf, &hints, &res0); | |
170 | } | |
171 | if (gai) | |
172 | { | |
173 | zlog_warn("Cannot locate loopback service smux"); | |
174 | return -1; | |
175 | } | |
176 | for(res=res0; res; res=res->ai_next) | |
177 | { | |
178 | if (res->ai_family != AF_INET | |
718e3744 | 179 | && res->ai_family != AF_INET6 |
718e3744 | 180 | ) |
181 | continue; | |
182 | ||
183 | sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
184 | if (sock < 0) | |
185 | continue; | |
186 | sockopt_reuseaddr (sock); | |
187 | sockopt_reuseport (sock); | |
188 | ret = connect (sock, res->ai_addr, res->ai_addrlen); | |
189 | if (ret < 0) | |
190 | { | |
191 | close(sock); | |
192 | sock = -1; | |
193 | continue; | |
194 | } | |
195 | break; | |
196 | } | |
197 | freeaddrinfo(res0); | |
198 | if (sock < 0) | |
199 | zlog_warn ("Can't connect to SNMP agent with SMUX"); | |
718e3744 | 200 | return sock; |
201 | } | |
202 | ||
0be8dfb2 | 203 | static void |
718e3744 | 204 | smux_getresp_send (oid objid[], size_t objid_len, long reqid, long errstat, |
205 | long errindex, u_char val_type, void *arg, size_t arg_len) | |
206 | { | |
718e3744 | 207 | u_char buf[BUFSIZ]; |
208 | u_char *ptr, *h1, *h1e, *h2, *h2e; | |
70e149e0 | 209 | size_t len, length; |
718e3744 | 210 | |
211 | ptr = buf; | |
212 | len = BUFSIZ; | |
213 | length = len; | |
214 | ||
215 | if (debug_smux) | |
216 | { | |
8ddca704 | 217 | zlog_debug ("SMUX GETRSP send"); |
218 | zlog_debug ("SMUX GETRSP reqid: %ld", reqid); | |
718e3744 | 219 | } |
220 | ||
221 | h1 = ptr; | |
222 | /* Place holder h1 for complete sequence */ | |
223 | ptr = asn_build_sequence (ptr, &len, (u_char) SMUX_GETRSP, 0); | |
224 | h1e = ptr; | |
225 | ||
226 | ptr = asn_build_int (ptr, &len, | |
227 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
228 | &reqid, sizeof (reqid)); | |
229 | ||
230 | if (debug_smux) | |
8ddca704 | 231 | zlog_debug ("SMUX GETRSP errstat: %ld", errstat); |
718e3744 | 232 | |
233 | ptr = asn_build_int (ptr, &len, | |
234 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
235 | &errstat, sizeof (errstat)); | |
236 | if (debug_smux) | |
8ddca704 | 237 | zlog_debug ("SMUX GETRSP errindex: %ld", errindex); |
718e3744 | 238 | |
239 | ptr = asn_build_int (ptr, &len, | |
240 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
241 | &errindex, sizeof (errindex)); | |
242 | ||
243 | h2 = ptr; | |
244 | /* Place holder h2 for one variable */ | |
245 | ptr = asn_build_sequence (ptr, &len, | |
246 | (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
247 | 0); | |
248 | h2e = ptr; | |
249 | ||
250 | ptr = snmp_build_var_op (ptr, objid, &objid_len, | |
251 | val_type, arg_len, arg, &len); | |
252 | ||
253 | /* Now variable size is known, fill in size */ | |
254 | asn_build_sequence(h2,&length,(u_char)(ASN_SEQUENCE|ASN_CONSTRUCTOR),ptr-h2e); | |
255 | ||
256 | /* Fill in size of whole sequence */ | |
257 | asn_build_sequence(h1,&length,(u_char)SMUX_GETRSP,ptr-h1e); | |
258 | ||
259 | if (debug_smux) | |
0be8dfb2 | 260 | zlog_debug ("SMUX getresp send: %td", (ptr - buf)); |
718e3744 | 261 | |
004b1238 | 262 | send (smux_sock, buf, (ptr - buf), 0); |
718e3744 | 263 | } |
264 | ||
0be8dfb2 CC |
265 | static u_char * |
266 | smux_var (u_char *ptr, size_t len, oid objid[], size_t *objid_len, | |
718e3744 | 267 | size_t *var_val_len, |
268 | u_char *var_val_type, | |
269 | void **var_value) | |
270 | { | |
271 | u_char type; | |
272 | u_char val_type; | |
273 | size_t val_len; | |
274 | u_char *val; | |
275 | ||
276 | if (debug_smux) | |
0be8dfb2 | 277 | zlog_debug ("SMUX var parse: len %zd", len); |
718e3744 | 278 | |
279 | /* Parse header. */ | |
280 | ptr = asn_parse_header (ptr, &len, &type); | |
281 | ||
282 | if (debug_smux) | |
283 | { | |
0be8dfb2 | 284 | zlog_debug ("SMUX var parse: type %d len %zd", type, len); |
8ddca704 | 285 | zlog_debug ("SMUX var parse: type must be %d", |
718e3744 | 286 | (ASN_SEQUENCE | ASN_CONSTRUCTOR)); |
287 | } | |
288 | ||
289 | /* Parse var option. */ | |
290 | *objid_len = MAX_OID_LEN; | |
291 | ptr = snmp_parse_var_op(ptr, objid, objid_len, &val_type, | |
292 | &val_len, &val, &len); | |
293 | ||
294 | if (var_val_len) | |
295 | *var_val_len = val_len; | |
296 | ||
297 | if (var_value) | |
298 | *var_value = (void*) val; | |
299 | ||
300 | if (var_val_type) | |
301 | *var_val_type = val_type; | |
302 | ||
303 | /* Requested object id length is objid_len. */ | |
304 | if (debug_smux) | |
305 | smux_oid_dump ("Request OID", objid, *objid_len); | |
306 | ||
307 | if (debug_smux) | |
8ddca704 | 308 | zlog_debug ("SMUX val_type: %d", val_type); |
718e3744 | 309 | |
310 | /* Check request value type. */ | |
311 | if (debug_smux) | |
312 | switch (val_type) | |
313 | { | |
314 | case ASN_NULL: | |
315 | /* In case of SMUX_GET or SMUX_GET_NEXT val_type is set to | |
316 | ASN_NULL. */ | |
8ddca704 | 317 | zlog_debug ("ASN_NULL"); |
718e3744 | 318 | break; |
319 | ||
320 | case ASN_INTEGER: | |
8ddca704 | 321 | zlog_debug ("ASN_INTEGER"); |
718e3744 | 322 | break; |
323 | case ASN_COUNTER: | |
324 | case ASN_GAUGE: | |
325 | case ASN_TIMETICKS: | |
326 | case ASN_UINTEGER: | |
8ddca704 | 327 | zlog_debug ("ASN_COUNTER"); |
718e3744 | 328 | break; |
329 | case ASN_COUNTER64: | |
8ddca704 | 330 | zlog_debug ("ASN_COUNTER64"); |
718e3744 | 331 | break; |
332 | case ASN_IPADDRESS: | |
8ddca704 | 333 | zlog_debug ("ASN_IPADDRESS"); |
718e3744 | 334 | break; |
335 | case ASN_OCTET_STR: | |
8ddca704 | 336 | zlog_debug ("ASN_OCTET_STR"); |
718e3744 | 337 | break; |
338 | case ASN_OPAQUE: | |
339 | case ASN_NSAP: | |
340 | case ASN_OBJECT_ID: | |
8ddca704 | 341 | zlog_debug ("ASN_OPAQUE"); |
718e3744 | 342 | break; |
343 | case SNMP_NOSUCHOBJECT: | |
8ddca704 | 344 | zlog_debug ("SNMP_NOSUCHOBJECT"); |
718e3744 | 345 | break; |
346 | case SNMP_NOSUCHINSTANCE: | |
8ddca704 | 347 | zlog_debug ("SNMP_NOSUCHINSTANCE"); |
718e3744 | 348 | break; |
349 | case SNMP_ENDOFMIBVIEW: | |
8ddca704 | 350 | zlog_debug ("SNMP_ENDOFMIBVIEW"); |
718e3744 | 351 | break; |
352 | case ASN_BIT_STR: | |
8ddca704 | 353 | zlog_debug ("ASN_BIT_STR"); |
718e3744 | 354 | break; |
355 | default: | |
8ddca704 | 356 | zlog_debug ("Unknown type"); |
718e3744 | 357 | break; |
358 | } | |
359 | return ptr; | |
360 | } | |
361 | ||
362 | /* NOTE: all 3 functions (smux_set, smux_get & smux_getnext) are based on | |
363 | ucd-snmp smux and as such suppose, that the peer receives in the message | |
364 | only one variable. Fortunately, IBM seems to do the same in AIX. */ | |
365 | ||
0be8dfb2 | 366 | static int |
718e3744 | 367 | smux_set (oid *reqid, size_t *reqid_len, |
368 | u_char val_type, void *val, size_t val_len, int action) | |
369 | { | |
370 | int j; | |
371 | struct subtree *subtree; | |
372 | struct variable *v; | |
373 | int subresult; | |
374 | oid *suffix; | |
70e149e0 | 375 | size_t suffix_len; |
718e3744 | 376 | int result; |
377 | u_char *statP = NULL; | |
378 | WriteMethod *write_method = NULL; | |
1eb8ef25 | 379 | struct listnode *node, *nnode; |
718e3744 | 380 | |
381 | /* Check */ | |
1eb8ef25 | 382 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 383 | { |
718e3744 | 384 | subresult = oid_compare_part (reqid, *reqid_len, |
385 | subtree->name, subtree->name_len); | |
386 | ||
387 | /* Subtree matched. */ | |
388 | if (subresult == 0) | |
389 | { | |
390 | /* Prepare suffix. */ | |
391 | suffix = reqid + subtree->name_len; | |
392 | suffix_len = *reqid_len - subtree->name_len; | |
393 | result = subresult; | |
394 | ||
395 | /* Check variables. */ | |
396 | for (j = 0; j < subtree->variables_num; j++) | |
397 | { | |
398 | v = &subtree->variables[j]; | |
399 | ||
400 | /* Always check suffix */ | |
401 | result = oid_compare_part (suffix, suffix_len, | |
402 | v->name, v->namelen); | |
403 | ||
404 | /* This is exact match so result must be zero. */ | |
405 | if (result == 0) | |
406 | { | |
407 | if (debug_smux) | |
8ddca704 | 408 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 409 | |
410 | statP = (*v->findVar) (v, suffix, &suffix_len, 1, | |
411 | &val_len, &write_method); | |
412 | ||
413 | if (write_method) | |
414 | { | |
415 | return (*write_method)(action, val, val_type, val_len, | |
3a4c9688 | 416 | statP, suffix, suffix_len); |
718e3744 | 417 | } |
418 | else | |
419 | { | |
420 | return SNMP_ERR_READONLY; | |
421 | } | |
422 | } | |
423 | ||
424 | /* If above execution is failed or oid is small (so | |
425 | there is no further match). */ | |
426 | if (result < 0) | |
427 | return SNMP_ERR_NOSUCHNAME; | |
428 | } | |
429 | } | |
430 | } | |
431 | return SNMP_ERR_NOSUCHNAME; | |
432 | } | |
433 | ||
0be8dfb2 | 434 | static int |
718e3744 | 435 | smux_get (oid *reqid, size_t *reqid_len, int exact, |
436 | u_char *val_type,void **val, size_t *val_len) | |
437 | { | |
438 | int j; | |
439 | struct subtree *subtree; | |
440 | struct variable *v; | |
441 | int subresult; | |
442 | oid *suffix; | |
70e149e0 | 443 | size_t suffix_len; |
718e3744 | 444 | int result; |
445 | WriteMethod *write_method=NULL; | |
1eb8ef25 | 446 | struct listnode *node, *nnode; |
718e3744 | 447 | |
448 | /* Check */ | |
1eb8ef25 | 449 | for (ALL_LIST_ELEMENTS (treelist, node, nnode,subtree)) |
718e3744 | 450 | { |
718e3744 | 451 | subresult = oid_compare_part (reqid, *reqid_len, |
452 | subtree->name, subtree->name_len); | |
453 | ||
454 | /* Subtree matched. */ | |
455 | if (subresult == 0) | |
456 | { | |
457 | /* Prepare suffix. */ | |
458 | suffix = reqid + subtree->name_len; | |
459 | suffix_len = *reqid_len - subtree->name_len; | |
460 | result = subresult; | |
461 | ||
462 | /* Check variables. */ | |
463 | for (j = 0; j < subtree->variables_num; j++) | |
464 | { | |
465 | v = &subtree->variables[j]; | |
466 | ||
467 | /* Always check suffix */ | |
468 | result = oid_compare_part (suffix, suffix_len, | |
469 | v->name, v->namelen); | |
470 | ||
471 | /* This is exact match so result must be zero. */ | |
472 | if (result == 0) | |
473 | { | |
474 | if (debug_smux) | |
8ddca704 | 475 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 476 | |
477 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
478 | val_len, &write_method); | |
479 | ||
480 | /* There is no instance. */ | |
481 | if (*val == NULL) | |
482 | return SNMP_NOSUCHINSTANCE; | |
483 | ||
484 | /* Call is suceed. */ | |
485 | *val_type = v->type; | |
486 | ||
487 | return 0; | |
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 | ||
0be8dfb2 | 500 | static int |
718e3744 | 501 | smux_getnext (oid *reqid, size_t *reqid_len, int exact, |
502 | u_char *val_type,void **val, size_t *val_len) | |
503 | { | |
504 | int j; | |
505 | oid save[MAX_OID_LEN]; | |
506 | int savelen = 0; | |
507 | struct subtree *subtree; | |
508 | struct variable *v; | |
509 | int subresult; | |
510 | oid *suffix; | |
70e149e0 | 511 | size_t suffix_len; |
718e3744 | 512 | int result; |
513 | WriteMethod *write_method=NULL; | |
1eb8ef25 | 514 | struct listnode *node, *nnode; |
718e3744 | 515 | |
516 | ||
517 | /* Save incoming request. */ | |
518 | oid_copy (save, reqid, *reqid_len); | |
519 | savelen = *reqid_len; | |
520 | ||
521 | /* Check */ | |
1eb8ef25 | 522 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 523 | { |
718e3744 | 524 | subresult = oid_compare_part (reqid, *reqid_len, |
525 | subtree->name, subtree->name_len); | |
526 | ||
527 | /* If request is in the tree. The agent has to make sure we | |
528 | only receive requests we have registered for. */ | |
529 | /* Unfortunately, that's not true. In fact, a SMUX subagent has to | |
530 | behave as if it manages the whole SNMP MIB tree itself. It's the | |
531 | duty of the master agent to collect the best answer and return it | |
532 | to the manager. See RFC 1227 chapter 3.1.6 for the glory details | |
533 | :-). ucd-snmp really behaves bad here as it actually might ask | |
534 | multiple times for the same GETNEXT request as it throws away the | |
535 | answer when it expects it in a different subtree and might come | |
536 | back later with the very same request. --jochen */ | |
537 | ||
538 | if (subresult <= 0) | |
539 | { | |
540 | /* Prepare suffix. */ | |
541 | suffix = reqid + subtree->name_len; | |
542 | suffix_len = *reqid_len - subtree->name_len; | |
543 | if (subresult < 0) | |
544 | { | |
545 | oid_copy(reqid, subtree->name, subtree->name_len); | |
546 | *reqid_len = subtree->name_len; | |
547 | } | |
548 | for (j = 0; j < subtree->variables_num; j++) | |
549 | { | |
550 | result = subresult; | |
551 | v = &subtree->variables[j]; | |
552 | ||
553 | /* Next then check result >= 0. */ | |
554 | if (result == 0) | |
555 | result = oid_compare_part (suffix, suffix_len, | |
556 | v->name, v->namelen); | |
557 | ||
558 | if (result <= 0) | |
559 | { | |
560 | if (debug_smux) | |
8ddca704 | 561 | zlog_debug ("SMUX function call index is %d", v->magic); |
718e3744 | 562 | if(result<0) |
563 | { | |
564 | oid_copy(suffix, v->name, v->namelen); | |
565 | suffix_len = v->namelen; | |
566 | } | |
567 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, | |
568 | val_len, &write_method); | |
569 | *reqid_len = suffix_len + subtree->name_len; | |
570 | if (*val) | |
571 | { | |
572 | *val_type = v->type; | |
573 | return 0; | |
574 | } | |
575 | } | |
576 | } | |
577 | } | |
578 | } | |
579 | memcpy (reqid, save, savelen * sizeof(oid)); | |
580 | *reqid_len = savelen; | |
581 | ||
582 | return SNMP_ERR_NOSUCHNAME; | |
583 | } | |
584 | ||
585 | /* GET message header. */ | |
0be8dfb2 CC |
586 | static u_char * |
587 | smux_parse_get_header (u_char *ptr, size_t *len, long *reqid) | |
718e3744 | 588 | { |
589 | u_char type; | |
590 | long errstat; | |
591 | long errindex; | |
592 | ||
593 | /* Request ID. */ | |
594 | ptr = asn_parse_int (ptr, len, &type, reqid, sizeof (*reqid)); | |
595 | ||
596 | if (debug_smux) | |
8ddca704 | 597 | zlog_debug ("SMUX GET reqid: %d len: %d", (int) *reqid, (int) *len); |
718e3744 | 598 | |
599 | /* Error status. */ | |
600 | ptr = asn_parse_int (ptr, len, &type, &errstat, sizeof (errstat)); | |
601 | ||
602 | if (debug_smux) | |
0be8dfb2 | 603 | zlog_debug ("SMUX GET errstat %ld len: %zd", errstat, *len); |
718e3744 | 604 | |
605 | /* Error index. */ | |
606 | ptr = asn_parse_int (ptr, len, &type, &errindex, sizeof (errindex)); | |
607 | ||
608 | if (debug_smux) | |
0be8dfb2 | 609 | zlog_debug ("SMUX GET errindex %ld len: %zd", errindex, *len); |
718e3744 | 610 | |
611 | return ptr; | |
612 | } | |
613 | ||
0be8dfb2 CC |
614 | static void |
615 | smux_parse_set (u_char *ptr, size_t len, int action) | |
718e3744 | 616 | { |
617 | long reqid; | |
618 | oid oid[MAX_OID_LEN]; | |
619 | size_t oid_len; | |
620 | u_char val_type; | |
621 | void *val; | |
622 | size_t val_len; | |
623 | int ret; | |
624 | ||
625 | if (debug_smux) | |
0be8dfb2 | 626 | zlog_debug ("SMUX SET(%s) message parse: len %zd", |
718e3744 | 627 | (RESERVE1 == action) ? "RESERVE1" : ((FREE == action) ? "FREE" : "COMMIT"), |
628 | len); | |
629 | ||
630 | /* Parse SET message header. */ | |
631 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
632 | ||
633 | /* Parse SET message object ID. */ | |
634 | ptr = smux_var (ptr, len, oid, &oid_len, &val_len, &val_type, &val); | |
635 | ||
636 | ret = smux_set (oid, &oid_len, val_type, val, val_len, action); | |
637 | if (debug_smux) | |
8ddca704 | 638 | zlog_debug ("SMUX SET ret %d", ret); |
718e3744 | 639 | |
640 | /* Return result. */ | |
641 | if (RESERVE1 == action) | |
642 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
643 | } | |
644 | ||
0be8dfb2 CC |
645 | static void |
646 | smux_parse_get (u_char *ptr, size_t len, int exact) | |
718e3744 | 647 | { |
648 | long reqid; | |
649 | oid oid[MAX_OID_LEN]; | |
650 | size_t oid_len; | |
651 | u_char val_type; | |
652 | void *val; | |
653 | size_t val_len; | |
654 | int ret; | |
655 | ||
656 | if (debug_smux) | |
0be8dfb2 | 657 | zlog_debug ("SMUX GET message parse: len %zd", len); |
718e3744 | 658 | |
659 | /* Parse GET message header. */ | |
660 | ptr = smux_parse_get_header (ptr, &len, &reqid); | |
661 | ||
662 | /* Parse GET message object ID. We needn't the value come */ | |
663 | ptr = smux_var (ptr, len, oid, &oid_len, NULL, NULL, NULL); | |
664 | ||
665 | /* Traditional getstatptr. */ | |
666 | if (exact) | |
667 | ret = smux_get (oid, &oid_len, exact, &val_type, &val, &val_len); | |
668 | else | |
669 | ret = smux_getnext (oid, &oid_len, exact, &val_type, &val, &val_len); | |
670 | ||
671 | /* Return result. */ | |
672 | if (ret == 0) | |
673 | smux_getresp_send (oid, oid_len, reqid, 0, 0, val_type, val, val_len); | |
674 | else | |
675 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); | |
676 | } | |
677 | ||
678 | /* Parse SMUX_CLOSE message. */ | |
0be8dfb2 CC |
679 | static void |
680 | smux_parse_close (u_char *ptr, int len) | |
718e3744 | 681 | { |
682 | long reason = 0; | |
683 | ||
684 | while (len--) | |
685 | { | |
686 | reason = (reason << 8) | (long) *ptr; | |
687 | ptr++; | |
688 | } | |
689 | zlog_info ("SMUX_CLOSE with reason: %ld", reason); | |
690 | } | |
691 | ||
692 | /* SMUX_RRSP message. */ | |
0be8dfb2 CC |
693 | static void |
694 | smux_parse_rrsp (u_char *ptr, size_t len) | |
718e3744 | 695 | { |
0be8dfb2 | 696 | u_char val; |
718e3744 | 697 | long errstat; |
698 | ||
699 | ptr = asn_parse_int (ptr, &len, &val, &errstat, sizeof (errstat)); | |
700 | ||
701 | if (debug_smux) | |
8ddca704 | 702 | zlog_debug ("SMUX_RRSP value: %d errstat: %ld", val, errstat); |
718e3744 | 703 | } |
704 | ||
705 | /* Parse SMUX message. */ | |
0be8dfb2 CC |
706 | static int |
707 | smux_parse (u_char *ptr, size_t len) | |
718e3744 | 708 | { |
709 | /* This buffer we'll use for SOUT message. We could allocate it with | |
710 | malloc and save only static pointer/lenght, but IMHO static | |
711 | buffer is a faster solusion. */ | |
712 | static u_char sout_save_buff[SMUXMAXPKTSIZE]; | |
713 | static int sout_save_len = 0; | |
714 | ||
715 | int len_income = len; /* see note below: YYY */ | |
716 | u_char type; | |
717 | u_char rollback; | |
718 | ||
719 | rollback = ptr[2]; /* important only for SMUX_SOUT */ | |
720 | ||
721 | process_rest: /* see note below: YYY */ | |
722 | ||
723 | /* Parse SMUX message type and subsequent length. */ | |
724 | ptr = asn_parse_header (ptr, &len, &type); | |
725 | ||
726 | if (debug_smux) | |
0be8dfb2 | 727 | zlog_debug ("SMUX message received type: %d rest len: %zd", type, len); |
718e3744 | 728 | |
729 | switch (type) | |
730 | { | |
731 | case SMUX_OPEN: | |
732 | /* Open must be not send from SNMP agent. */ | |
733 | zlog_warn ("SMUX_OPEN received: resetting connection."); | |
734 | return -1; | |
735 | break; | |
736 | case SMUX_RREQ: | |
737 | /* SMUX_RREQ message is invalid for us. */ | |
738 | zlog_warn ("SMUX_RREQ received: resetting connection."); | |
739 | return -1; | |
740 | break; | |
741 | case SMUX_SOUT: | |
742 | /* SMUX_SOUT message is now valied for us. */ | |
743 | if (debug_smux) | |
8ddca704 | 744 | zlog_debug ("SMUX_SOUT(%s)", rollback ? "rollback" : "commit"); |
718e3744 | 745 | |
746 | if (sout_save_len > 0) | |
747 | { | |
748 | smux_parse_set (sout_save_buff, sout_save_len, rollback ? FREE : COMMIT); | |
749 | sout_save_len = 0; | |
750 | } | |
751 | else | |
752 | zlog_warn ("SMUX_SOUT sout_save_len=%d - invalid", (int) sout_save_len); | |
753 | ||
754 | if (len_income > 3) | |
755 | { | |
756 | /* YYY: this strange code has to solve the "slow peer" | |
757 | problem: When agent sends SMUX_SOUT message it doesn't | |
758 | wait any responce and may send some next message to | |
759 | subagent. Then the peer in 'smux_read()' will recieve | |
760 | from socket the 'concatenated' buffer, contaning both | |
761 | SMUX_SOUT message and the next one | |
762 | (SMUX_GET/SMUX_GETNEXT/SMUX_GET). So we should check: if | |
763 | the buffer is longer than 3 ( length of SMUX_SOUT ), we | |
764 | must process the rest of it. This effect may be observed | |
765 | if 'debug_smux' is set to '1' */ | |
766 | ptr++; | |
767 | len = len_income - 3; | |
768 | goto process_rest; | |
769 | } | |
770 | break; | |
771 | case SMUX_GETRSP: | |
772 | /* SMUX_GETRSP message is invalid for us. */ | |
773 | zlog_warn ("SMUX_GETRSP received: resetting connection."); | |
774 | return -1; | |
775 | break; | |
776 | case SMUX_CLOSE: | |
777 | /* Close SMUX connection. */ | |
778 | if (debug_smux) | |
8ddca704 | 779 | zlog_debug ("SMUX_CLOSE"); |
718e3744 | 780 | smux_parse_close (ptr, len); |
781 | return -1; | |
782 | break; | |
783 | case SMUX_RRSP: | |
784 | /* This is response for register message. */ | |
785 | if (debug_smux) | |
8ddca704 | 786 | zlog_debug ("SMUX_RRSP"); |
718e3744 | 787 | smux_parse_rrsp (ptr, len); |
788 | break; | |
789 | case SMUX_GET: | |
790 | /* Exact request for object id. */ | |
791 | if (debug_smux) | |
8ddca704 | 792 | zlog_debug ("SMUX_GET"); |
718e3744 | 793 | smux_parse_get (ptr, len, 1); |
794 | break; | |
795 | case SMUX_GETNEXT: | |
796 | /* Next request for object id. */ | |
797 | if (debug_smux) | |
8ddca704 | 798 | zlog_debug ("SMUX_GETNEXT"); |
718e3744 | 799 | smux_parse_get (ptr, len, 0); |
800 | break; | |
801 | case SMUX_SET: | |
802 | /* SMUX_SET is supported with some limitations. */ | |
803 | if (debug_smux) | |
8ddca704 | 804 | zlog_debug ("SMUX_SET"); |
718e3744 | 805 | |
806 | /* save the data for future SMUX_SOUT */ | |
807 | memcpy (sout_save_buff, ptr, len); | |
808 | sout_save_len = len; | |
809 | smux_parse_set (ptr, len, RESERVE1); | |
810 | break; | |
811 | default: | |
812 | zlog_info ("Unknown type: %d", type); | |
813 | break; | |
814 | } | |
815 | return 0; | |
816 | } | |
817 | ||
818 | /* SMUX message read function. */ | |
0be8dfb2 | 819 | static int |
718e3744 | 820 | smux_read (struct thread *t) |
821 | { | |
822 | int sock; | |
823 | int len; | |
824 | u_char buf[SMUXMAXPKTSIZE]; | |
825 | int ret; | |
826 | ||
827 | /* Clear thread. */ | |
828 | sock = THREAD_FD (t); | |
829 | smux_read_thread = NULL; | |
830 | ||
831 | if (debug_smux) | |
8ddca704 | 832 | zlog_debug ("SMUX read start"); |
718e3744 | 833 | |
834 | /* Read message from SMUX socket. */ | |
835 | len = recv (sock, buf, SMUXMAXPKTSIZE, 0); | |
836 | ||
837 | if (len < 0) | |
838 | { | |
6099b3b5 | 839 | zlog_warn ("Can't read all SMUX packet: %s", safe_strerror (errno)); |
718e3744 | 840 | close (sock); |
841 | smux_sock = -1; | |
842 | smux_event (SMUX_CONNECT, 0); | |
843 | return -1; | |
844 | } | |
845 | ||
846 | if (len == 0) | |
847 | { | |
848 | zlog_warn ("SMUX connection closed: %d", sock); | |
849 | close (sock); | |
850 | smux_sock = -1; | |
851 | smux_event (SMUX_CONNECT, 0); | |
852 | return -1; | |
853 | } | |
854 | ||
855 | if (debug_smux) | |
8ddca704 | 856 | zlog_debug ("SMUX read len: %d", len); |
718e3744 | 857 | |
858 | /* Parse the message. */ | |
859 | ret = smux_parse (buf, len); | |
860 | ||
861 | if (ret < 0) | |
862 | { | |
863 | close (sock); | |
864 | smux_sock = -1; | |
865 | smux_event (SMUX_CONNECT, 0); | |
866 | return -1; | |
867 | } | |
868 | ||
869 | /* Regiser read thread. */ | |
870 | smux_event (SMUX_READ, sock); | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
0be8dfb2 | 875 | static int |
718e3744 | 876 | smux_open (int sock) |
877 | { | |
878 | u_char buf[BUFSIZ]; | |
879 | u_char *ptr; | |
70e149e0 | 880 | size_t len; |
0be8dfb2 | 881 | long version; |
b2f36157 | 882 | const char progname[] = FRR_SMUX_NAME "-" FRR_VERSION; |
718e3744 | 883 | |
884 | if (debug_smux) | |
885 | { | |
886 | smux_oid_dump ("SMUX open oid", smux_oid, smux_oid_len); | |
8ddca704 | 887 | zlog_debug ("SMUX open progname: %s", progname); |
888 | zlog_debug ("SMUX open password: %s", smux_passwd); | |
718e3744 | 889 | } |
890 | ||
891 | ptr = buf; | |
892 | len = BUFSIZ; | |
893 | ||
894 | /* SMUX Header. As placeholder. */ | |
895 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_OPEN, 0); | |
896 | ||
897 | /* SMUX Open. */ | |
898 | version = 0; | |
899 | ptr = asn_build_int (ptr, &len, | |
900 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
965b83f9 | 901 | &version, sizeof (version)); |
718e3744 | 902 | |
903 | /* SMUX connection oid. */ | |
904 | ptr = asn_build_objid (ptr, &len, | |
905 | (u_char) | |
906 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
907 | smux_oid, smux_oid_len); | |
908 | ||
909 | /* SMUX connection description. */ | |
910 | ptr = asn_build_string (ptr, &len, | |
911 | (u_char) | |
912 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
004b1238 | 913 | (const u_char *) progname, strlen (progname)); |
718e3744 | 914 | |
915 | /* SMUX connection password. */ | |
916 | ptr = asn_build_string (ptr, &len, | |
917 | (u_char) | |
918 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), | |
0be8dfb2 | 919 | (u_char *)smux_passwd, strlen (smux_passwd)); |
718e3744 | 920 | |
921 | /* Fill in real SMUX header. We exclude ASN header size (2). */ | |
922 | len = BUFSIZ; | |
923 | asn_build_header (buf, &len, (u_char) SMUX_OPEN, (ptr - buf) - 2); | |
924 | ||
925 | return send (sock, buf, (ptr - buf), 0); | |
926 | } | |
927 | ||
b7c0d065 VB |
928 | /* `ename` is ignored. Instead of using the provided enterprise OID, |
929 | the SMUX peer is used. This keep compatibility with the previous | |
930 | versions of Quagga. | |
931 | ||
932 | All other fields are used as they are intended. */ | |
718e3744 | 933 | int |
b7c0d065 VB |
934 | smux_trap (struct variable *vp, size_t vp_len, |
935 | const oid *ename, size_t enamelen, | |
936 | const oid *name, size_t namelen, | |
65d3fbb4 SH |
937 | const oid *iname, size_t inamelen, |
938 | const struct trap_object *trapobj, size_t trapobjlen, | |
4b89e45d | 939 | u_char sptrap) |
718e3744 | 940 | { |
9035efaa | 941 | unsigned int i; |
718e3744 | 942 | u_char buf[BUFSIZ]; |
943 | u_char *ptr; | |
70e149e0 | 944 | size_t len, length; |
718e3744 | 945 | struct in_addr addr; |
946 | unsigned long val; | |
947 | u_char *h1, *h1e; | |
948 | ||
949 | ptr = buf; | |
950 | len = BUFSIZ; | |
951 | length = len; | |
952 | ||
953 | /* When SMUX connection is not established. */ | |
954 | if (smux_sock < 0) | |
955 | return 0; | |
956 | ||
957 | /* SMUX header. */ | |
958 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_TRAP, 0); | |
959 | ||
960 | /* Sub agent enterprise oid. */ | |
961 | ptr = asn_build_objid (ptr, &len, | |
962 | (u_char) | |
963 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
964 | smux_oid, smux_oid_len); | |
965 | ||
966 | /* IP address. */ | |
967 | addr.s_addr = 0; | |
968 | ptr = asn_build_string (ptr, &len, | |
969 | (u_char) | |
970 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_IPADDRESS), | |
965b83f9 | 971 | (u_char *)&addr, sizeof (addr)); |
718e3744 | 972 | |
973 | /* Generic trap integer. */ | |
974 | val = SNMP_TRAP_ENTERPRISESPECIFIC; | |
975 | ptr = asn_build_int (ptr, &len, | |
976 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
0be8dfb2 | 977 | (long *)&val, sizeof (val)); |
718e3744 | 978 | |
979 | /* Specific trap integer. */ | |
020709f9 | 980 | val = sptrap; |
718e3744 | 981 | ptr = asn_build_int (ptr, &len, |
982 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
0be8dfb2 | 983 | (long *)&val, sizeof (val)); |
718e3744 | 984 | |
985 | /* Timeticks timestamp. */ | |
986 | val = 0; | |
987 | ptr = asn_build_unsigned_int (ptr, &len, | |
988 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_TIMETICKS), | |
965b83f9 | 989 | &val, sizeof (val)); |
718e3744 | 990 | |
991 | /* Variables. */ | |
992 | h1 = ptr; | |
993 | ptr = asn_build_sequence (ptr, &len, | |
994 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
995 | 0); | |
996 | ||
997 | ||
998 | /* Iteration for each objects. */ | |
999 | h1e = ptr; | |
1000 | for (i = 0; i < trapobjlen; i++) | |
1001 | { | |
1002 | int ret; | |
1003 | oid oid[MAX_OID_LEN]; | |
1004 | size_t oid_len; | |
1005 | void *val; | |
1006 | size_t val_len; | |
1007 | u_char val_type; | |
1008 | ||
1009 | /* Make OID. */ | |
5e4914c3 | 1010 | if (trapobj[i].namelen > 0) |
1011 | { | |
1012 | oid_copy (oid, name, namelen); | |
1013 | oid_copy (oid + namelen, trapobj[i].name, trapobj[i].namelen); | |
1014 | oid_copy (oid + namelen + trapobj[i].namelen, iname, inamelen); | |
1015 | oid_len = namelen + trapobj[i].namelen + inamelen; | |
1016 | } | |
1017 | else | |
1018 | { | |
1019 | oid_copy (oid, name, namelen); | |
1020 | oid_copy (oid + namelen, trapobj[i].name, trapobj[i].namelen * (-1)); | |
1021 | oid_len = namelen + trapobj[i].namelen * (-1) ; | |
1022 | } | |
718e3744 | 1023 | |
5e4914c3 | 1024 | if (debug_smux) |
1025 | { | |
1026 | smux_oid_dump ("Trap", name, namelen); | |
1027 | if (trapobj[i].namelen < 0) | |
1028 | smux_oid_dump ("Trap", | |
1029 | trapobj[i].name, (- 1) * (trapobj[i].namelen)); | |
1030 | else | |
1031 | { | |
1032 | smux_oid_dump ("Trap", trapobj[i].name, (trapobj[i].namelen)); | |
1033 | smux_oid_dump ("Trap", iname, inamelen); | |
1034 | } | |
1035 | smux_oid_dump ("Trap", oid, oid_len); | |
eda9ba74 | 1036 | zlog_info ("BUFSIZ: %d // oid_len: %lu", BUFSIZ, (u_long)oid_len); |
5e4914c3 | 1037 | } |
718e3744 | 1038 | |
1039 | ret = smux_get (oid, &oid_len, 1, &val_type, &val, &val_len); | |
1040 | ||
1041 | if (debug_smux) | |
8ddca704 | 1042 | zlog_debug ("smux_get result %d", ret); |
718e3744 | 1043 | |
1044 | if (ret == 0) | |
1045 | ptr = snmp_build_var_op (ptr, oid, &oid_len, | |
1046 | val_type, val_len, val, &len); | |
1047 | } | |
1048 | ||
1049 | /* Now variable size is known, fill in size */ | |
1050 | asn_build_sequence(h1, &length, | |
1051 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), | |
1052 | ptr - h1e); | |
1053 | ||
1054 | /* Fill in size of whole sequence */ | |
1055 | len = BUFSIZ; | |
1056 | asn_build_header (buf, &len, (u_char) SMUX_TRAP, (ptr - buf) - 2); | |
1057 | ||
1058 | return send (smux_sock, buf, (ptr - buf), 0); | |
1059 | } | |
1060 | ||
0be8dfb2 | 1061 | static int |
718e3744 | 1062 | smux_register (int sock) |
1063 | { | |
1064 | u_char buf[BUFSIZ]; | |
1065 | u_char *ptr; | |
70e149e0 | 1066 | int ret; |
1067 | size_t len; | |
718e3744 | 1068 | long priority; |
1069 | long operation; | |
1070 | struct subtree *subtree; | |
1eb8ef25 | 1071 | struct listnode *node, *nnode; |
718e3744 | 1072 | |
1073 | ret = 0; | |
1074 | ||
1eb8ef25 | 1075 | for (ALL_LIST_ELEMENTS (treelist, node, nnode, subtree)) |
718e3744 | 1076 | { |
1077 | ptr = buf; | |
1078 | len = BUFSIZ; | |
1079 | ||
718e3744 | 1080 | /* SMUX RReq Header. */ |
1081 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_RREQ, 0); | |
1082 | ||
1083 | /* Register MIB tree. */ | |
1084 | ptr = asn_build_objid (ptr, &len, | |
1085 | (u_char) | |
1086 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), | |
1087 | subtree->name, subtree->name_len); | |
1088 | ||
1089 | /* Priority. */ | |
1090 | priority = -1; | |
1091 | ptr = asn_build_int (ptr, &len, | |
1092 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
965b83f9 | 1093 | &priority, sizeof (priority)); |
718e3744 | 1094 | |
1095 | /* Operation. */ | |
1096 | operation = 2; /* Register R/W */ | |
1097 | ptr = asn_build_int (ptr, &len, | |
1098 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), | |
965b83f9 | 1099 | &operation, sizeof (operation)); |
718e3744 | 1100 | |
1101 | if (debug_smux) | |
1102 | { | |
1103 | smux_oid_dump ("SMUX register oid", subtree->name, subtree->name_len); | |
8ddca704 | 1104 | zlog_debug ("SMUX register priority: %ld", priority); |
1105 | zlog_debug ("SMUX register operation: %ld", operation); | |
718e3744 | 1106 | } |
1107 | ||
1108 | len = BUFSIZ; | |
1109 | asn_build_header (buf, &len, (u_char) SMUX_RREQ, (ptr - buf) - 2); | |
1110 | ret = send (sock, buf, (ptr - buf), 0); | |
1111 | if (ret < 0) | |
1112 | return ret; | |
1113 | } | |
1114 | return ret; | |
1115 | } | |
1116 | ||
1117 | /* Try to connect to SNMP agent. */ | |
0be8dfb2 | 1118 | static int |
718e3744 | 1119 | smux_connect (struct thread *t) |
1120 | { | |
1121 | int ret; | |
1122 | ||
1123 | if (debug_smux) | |
8ddca704 | 1124 | zlog_debug ("SMUX connect try %d", fail + 1); |
718e3744 | 1125 | |
1126 | /* Clear thread poner of myself. */ | |
1127 | smux_connect_thread = NULL; | |
1128 | ||
1129 | /* Make socket. Try to connect. */ | |
1130 | smux_sock = smux_socket (); | |
1131 | if (smux_sock < 0) | |
1132 | { | |
1133 | if (++fail < SMUX_MAX_FAILURE) | |
1134 | smux_event (SMUX_CONNECT, 0); | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | /* Send OPEN PDU. */ | |
1139 | ret = smux_open (smux_sock); | |
1140 | if (ret < 0) | |
1141 | { | |
6099b3b5 | 1142 | zlog_warn ("SMUX open message send failed: %s", safe_strerror (errno)); |
718e3744 | 1143 | close (smux_sock); |
1144 | smux_sock = -1; | |
1145 | if (++fail < SMUX_MAX_FAILURE) | |
1146 | smux_event (SMUX_CONNECT, 0); | |
1147 | return -1; | |
1148 | } | |
1149 | ||
1150 | /* Send any outstanding register PDUs. */ | |
1151 | ret = smux_register (smux_sock); | |
1152 | if (ret < 0) | |
1153 | { | |
6099b3b5 | 1154 | zlog_warn ("SMUX register message send failed: %s", safe_strerror (errno)); |
718e3744 | 1155 | close (smux_sock); |
1156 | smux_sock = -1; | |
1157 | if (++fail < SMUX_MAX_FAILURE) | |
1158 | smux_event (SMUX_CONNECT, 0); | |
1159 | return -1; | |
1160 | } | |
1161 | ||
1162 | /* Everything goes fine. */ | |
1163 | smux_event (SMUX_READ, smux_sock); | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | /* Clear all SMUX related resources. */ | |
0be8dfb2 | 1169 | static void |
65d3fbb4 | 1170 | smux_stop (void) |
718e3744 | 1171 | { |
1172 | if (smux_read_thread) | |
a56ef883 PJ |
1173 | { |
1174 | thread_cancel (smux_read_thread); | |
1175 | smux_read_thread = NULL; | |
1176 | } | |
1177 | ||
718e3744 | 1178 | if (smux_connect_thread) |
a56ef883 PJ |
1179 | { |
1180 | thread_cancel (smux_connect_thread); | |
1181 | smux_connect_thread = NULL; | |
1182 | } | |
718e3744 | 1183 | |
1184 | if (smux_sock >= 0) | |
1185 | { | |
1186 | close (smux_sock); | |
1187 | smux_sock = -1; | |
1188 | } | |
1189 | } | |
6b0655a2 | 1190 | |
dd488a78 | 1191 | |
718e3744 | 1192 | |
1193 | void | |
1194 | smux_event (enum smux_event event, int sock) | |
1195 | { | |
1196 | switch (event) | |
1197 | { | |
1198 | case SMUX_SCHEDULE: | |
66e78ae6 QY |
1199 | smux_connect_thread = NULL; |
1200 | thread_add_event(smux_master, smux_connect, NULL, 0, | |
1201 | &smux_connect_thread); | |
718e3744 | 1202 | break; |
1203 | case SMUX_CONNECT: | |
66e78ae6 QY |
1204 | smux_connect_thread = NULL; |
1205 | thread_add_timer(smux_master, smux_connect, NULL, 10, | |
1206 | &smux_connect_thread); | |
718e3744 | 1207 | break; |
1208 | case SMUX_READ: | |
66e78ae6 QY |
1209 | smux_read_thread = NULL; |
1210 | thread_add_read(smux_master, smux_read, NULL, sock, &smux_read_thread); | |
718e3744 | 1211 | break; |
1212 | default: | |
1213 | break; | |
1214 | } | |
1215 | } | |
6b0655a2 | 1216 | |
0be8dfb2 | 1217 | static int |
9035efaa | 1218 | smux_str2oid (const char *str, oid *oid, size_t *oid_len) |
718e3744 | 1219 | { |
1220 | int len; | |
1221 | int val; | |
1222 | ||
1223 | len = 0; | |
1224 | val = 0; | |
1225 | *oid_len = 0; | |
1226 | ||
1227 | if (*str == '.') | |
1228 | str++; | |
1229 | if (*str == '\0') | |
1230 | return 0; | |
1231 | ||
1232 | while (1) | |
1233 | { | |
1234 | if (! isdigit (*str)) | |
1235 | return -1; | |
1236 | ||
1237 | while (isdigit (*str)) | |
1238 | { | |
1239 | val *= 10; | |
1240 | val += (*str - '0'); | |
1241 | str++; | |
1242 | } | |
1243 | ||
1244 | if (*str == '\0') | |
1245 | break; | |
1246 | if (*str != '.') | |
1247 | return -1; | |
1248 | ||
1249 | oid[len++] = val; | |
1250 | val = 0; | |
1251 | str++; | |
1252 | } | |
1253 | ||
1254 | oid[len++] = val; | |
1255 | *oid_len = len; | |
1256 | ||
1257 | return 0; | |
1258 | } | |
1259 | ||
0be8dfb2 | 1260 | static oid * |
718e3744 | 1261 | smux_oid_dup (oid *objid, size_t objid_len) |
1262 | { | |
1263 | oid *new; | |
1264 | ||
1265 | new = XMALLOC (MTYPE_TMP, sizeof (oid) * objid_len); | |
1266 | oid_copy (new, objid, objid_len); | |
1267 | ||
1268 | return new; | |
1269 | } | |
1270 | ||
0be8dfb2 | 1271 | static int |
9035efaa | 1272 | smux_peer_oid (struct vty *vty, const char *oid_str, const char *passwd_str) |
718e3744 | 1273 | { |
1274 | int ret; | |
1275 | oid oid[MAX_OID_LEN]; | |
1276 | size_t oid_len; | |
1277 | ||
1278 | ret = smux_str2oid (oid_str, oid, &oid_len); | |
1279 | if (ret != 0) | |
1280 | { | |
1281 | vty_out (vty, "object ID malformed%s", VTY_NEWLINE); | |
1282 | return CMD_WARNING; | |
1283 | } | |
1284 | ||
c75105ab | 1285 | if (smux_oid) |
1286 | { | |
1287 | free (smux_oid); | |
1288 | smux_oid = NULL; | |
1289 | } | |
718e3744 | 1290 | |
9035efaa | 1291 | /* careful, smux_passwd might point to string constant */ |
c75105ab | 1292 | if (smux_passwd) |
718e3744 | 1293 | { |
1294 | free (smux_passwd); | |
1295 | smux_passwd = NULL; | |
1296 | } | |
1297 | ||
1298 | smux_oid = smux_oid_dup (oid, oid_len); | |
1299 | smux_oid_len = oid_len; | |
1300 | ||
1301 | if (passwd_str) | |
1302 | smux_passwd = strdup (passwd_str); | |
c75105ab | 1303 | else |
1304 | smux_passwd = strdup (""); | |
718e3744 | 1305 | |
c75105ab | 1306 | return 0; |
718e3744 | 1307 | } |
1308 | ||
0be8dfb2 | 1309 | static int |
65d3fbb4 | 1310 | smux_peer_default (void) |
718e3744 | 1311 | { |
c75105ab | 1312 | if (smux_oid) |
718e3744 | 1313 | { |
1314 | free (smux_oid); | |
c75105ab | 1315 | smux_oid = NULL; |
718e3744 | 1316 | } |
9035efaa | 1317 | |
1318 | /* careful, smux_passwd might be pointing at string constant */ | |
c75105ab | 1319 | if (smux_passwd) |
718e3744 | 1320 | { |
1321 | free (smux_passwd); | |
c75105ab | 1322 | smux_passwd = NULL; |
718e3744 | 1323 | } |
c75105ab | 1324 | |
718e3744 | 1325 | return CMD_SUCCESS; |
1326 | } | |
1327 | ||
1328 | DEFUN (smux_peer, | |
1329 | smux_peer_cmd, | |
1330 | "smux peer OID", | |
1331 | "SNMP MUX protocol settings\n" | |
1332 | "SNMP MUX peer settings\n" | |
1333 | "Object ID used in SMUX peering\n") | |
1334 | { | |
c349116d DW |
1335 | int idx_oid = 2; |
1336 | if (smux_peer_oid (vty, argv[idx_oid]->arg, NULL) == 0) | |
c75105ab | 1337 | { |
1338 | smux_start(); | |
1339 | return CMD_SUCCESS; | |
1340 | } | |
1341 | else | |
1342 | return CMD_WARNING; | |
718e3744 | 1343 | } |
1344 | ||
1345 | DEFUN (smux_peer_password, | |
1346 | smux_peer_password_cmd, | |
1347 | "smux peer OID PASSWORD", | |
1348 | "SNMP MUX protocol settings\n" | |
1349 | "SNMP MUX peer settings\n" | |
1350 | "SMUX peering object ID\n" | |
1351 | "SMUX peering password\n") | |
1352 | { | |
c349116d DW |
1353 | int idx_oid = 2; |
1354 | if (smux_peer_oid (vty, argv[idx_oid]->arg, argv[3]->rg) == 0) | |
c75105ab | 1355 | { |
1356 | smux_start(); | |
1357 | return CMD_SUCCESS; | |
1358 | } | |
1359 | else | |
1360 | return CMD_WARNING; | |
718e3744 | 1361 | } |
1362 | ||
1363 | DEFUN (no_smux_peer, | |
1364 | no_smux_peer_cmd, | |
aa1c90a4 | 1365 | "no smux peer [OID [PASSWORD]]", |
718e3744 | 1366 | NO_STR |
1367 | "SNMP MUX protocol settings\n" | |
aa1c90a4 QY |
1368 | "SNMP MUX peer settings\n" |
1369 | "SMUX peering object ID\n" | |
1370 | "SMUX peering password\n") | |
718e3744 | 1371 | { |
c75105ab | 1372 | smux_stop(); |
718e3744 | 1373 | return smux_peer_default (); |
1374 | } | |
1375 | ||
0be8dfb2 | 1376 | static int |
718e3744 | 1377 | config_write_smux (struct vty *vty) |
1378 | { | |
1379 | int first = 1; | |
9035efaa | 1380 | unsigned int i; |
718e3744 | 1381 | |
c75105ab | 1382 | if (smux_oid) |
718e3744 | 1383 | { |
1384 | vty_out (vty, "smux peer "); | |
1385 | for (i = 0; i < smux_oid_len; i++) | |
1386 | { | |
1387 | vty_out (vty, "%s%d", first ? "" : ".", (int) smux_oid[i]); | |
1388 | first = 0; | |
1389 | } | |
1390 | vty_out (vty, " %s%s", smux_passwd, VTY_NEWLINE); | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | /* Register subtree to smux master tree. */ | |
1396 | void | |
c9eca01b | 1397 | smux_register_mib (const char *descr, struct variable *var, |
1398 | size_t width, int num, | |
718e3744 | 1399 | oid name[], size_t namelen) |
1400 | { | |
1401 | struct subtree *tree; | |
1402 | ||
1403 | tree = (struct subtree *)malloc(sizeof(struct subtree)); | |
1404 | oid_copy (tree->name, name, namelen); | |
1405 | tree->name_len = namelen; | |
1406 | tree->variables = var; | |
1407 | tree->variables_num = num; | |
1408 | tree->variables_width = width; | |
1409 | tree->registered = 0; | |
1410 | listnode_add_sort(treelist, tree); | |
1411 | } | |
1412 | ||
718e3744 | 1413 | /* Compare function to keep treelist sorted */ |
1414 | static int | |
1415 | smux_tree_cmp(struct subtree *tree1, struct subtree *tree2) | |
1416 | { | |
1417 | return oid_compare(tree1->name, tree1->name_len, | |
1418 | tree2->name, tree2->name_len); | |
1419 | } | |
1420 | ||
1421 | /* Initialize some values then schedule first SMUX connection. */ | |
1422 | void | |
c75105ab | 1423 | smux_init (struct thread_master *tm) |
718e3744 | 1424 | { |
79159516 | 1425 | assert (tm); |
dd488a78 | 1426 | /* copy callers thread master */ |
79159516 | 1427 | smux_master = tm; |
718e3744 | 1428 | |
1429 | /* Make MIB tree. */ | |
1430 | treelist = list_new(); | |
1431 | treelist->cmp = (int (*)(void *, void *))smux_tree_cmp; | |
1432 | ||
1433 | /* Install commands. */ | |
1434 | install_node (&smux_node, config_write_smux); | |
1435 | ||
1436 | install_element (CONFIG_NODE, &smux_peer_cmd); | |
1437 | install_element (CONFIG_NODE, &smux_peer_password_cmd); | |
1438 | install_element (CONFIG_NODE, &no_smux_peer_cmd); | |
c75105ab | 1439 | install_element (CONFIG_NODE, &no_smux_peer_oid_cmd); |
1440 | install_element (CONFIG_NODE, &no_smux_peer_oid_password_cmd); | |
718e3744 | 1441 | } |
1442 | ||
1443 | void | |
1444 | smux_start(void) | |
1445 | { | |
a56ef883 PJ |
1446 | /* Close any existing connections. */ |
1447 | smux_stop(); | |
1448 | ||
718e3744 | 1449 | /* Schedule first connection. */ |
1450 | smux_event (SMUX_SCHEDULE, 0); | |
1451 | } | |
5986b66b | 1452 | #endif /* SNMP_SMUX */ |