paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 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 |
paul | 07661cb | 2003-03-18 00:03:05 +0000 | [diff] [blame] | 25 | #ifdef HAVE_NETSNMP |
| 26 | #include <net-snmp/net-snmp-config.h> |
| 27 | #endif |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 28 | #include <asn1.h> |
| 29 | #include <snmp.h> |
| 30 | #include <snmp_impl.h> |
| 31 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 32 | #include "log.h" |
| 33 | #include "thread.h" |
| 34 | #include "linklist.h" |
| 35 | #include "command.h" |
gdt | 5e4fa16 | 2004-03-16 14:38:36 +0000 | [diff] [blame] | 36 | #include <lib/version.h> |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 37 | #include "memory.h" |
| 38 | #include "sockunion.h" |
paul | dd488a7 | 2003-06-19 01:21:07 +0000 | [diff] [blame] | 39 | #include "smux.h" |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 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 | |
| 47 | |
| 48 | /* SMUX socket. */ |
| 49 | int smux_sock = -1; |
| 50 | |
| 51 | /* SMUX subtree list. */ |
| 52 | struct list *treelist; |
| 53 | |
| 54 | /* SMUX oid. */ |
| 55 | oid *smux_oid; |
| 56 | size_t smux_oid_len; |
| 57 | |
| 58 | /* SMUX default oid. */ |
| 59 | oid *smux_default_oid; |
| 60 | size_t smux_default_oid_len; |
| 61 | |
| 62 | /* SMUX password. */ |
| 63 | char *smux_passwd; |
| 64 | char *smux_default_passwd = ""; |
| 65 | |
| 66 | /* SMUX read threads. */ |
| 67 | struct thread *smux_read_thread; |
| 68 | |
| 69 | /* SMUX connect thrads. */ |
| 70 | struct thread *smux_connect_thread; |
| 71 | |
| 72 | /* SMUX debug flag. */ |
| 73 | int debug_smux = 0; |
| 74 | |
| 75 | /* SMUX failure count. */ |
| 76 | int fail = 0; |
| 77 | |
| 78 | /* SMUX node. */ |
| 79 | struct cmd_node smux_node = |
| 80 | { |
| 81 | SMUX_NODE, |
| 82 | "" /* SMUX has no interface. */ |
| 83 | }; |
paul | dd488a7 | 2003-06-19 01:21:07 +0000 | [diff] [blame] | 84 | |
| 85 | /* thread master */ |
| 86 | static struct thread_master *master; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 87 | |
| 88 | void * |
| 89 | oid_copy (void *dest, void *src, size_t size) |
| 90 | { |
| 91 | return memcpy (dest, src, size * sizeof (oid)); |
| 92 | } |
| 93 | |
| 94 | void |
| 95 | oid2in_addr (oid oid[], int len, struct in_addr *addr) |
| 96 | { |
| 97 | int i; |
| 98 | u_char *pnt; |
| 99 | |
| 100 | if (len == 0) |
| 101 | return; |
| 102 | |
| 103 | pnt = (u_char *) addr; |
| 104 | |
| 105 | for (i = 0; i < len; i++) |
| 106 | *pnt++ = oid[i]; |
| 107 | } |
| 108 | |
| 109 | void |
| 110 | oid_copy_addr (oid oid[], struct in_addr *addr, int len) |
| 111 | { |
| 112 | int i; |
| 113 | u_char *pnt; |
| 114 | |
| 115 | if (len == 0) |
| 116 | return; |
| 117 | |
| 118 | pnt = (u_char *) addr; |
| 119 | |
| 120 | for (i = 0; i < len; i++) |
| 121 | oid[i] = *pnt++; |
| 122 | } |
| 123 | |
| 124 | int |
| 125 | oid_compare (oid *o1, int o1_len, oid *o2, int o2_len) |
| 126 | { |
| 127 | int i; |
| 128 | |
| 129 | for (i = 0; i < min (o1_len, o2_len); i++) |
| 130 | { |
| 131 | if (o1[i] < o2[i]) |
| 132 | return -1; |
| 133 | else if (o1[i] > o2[i]) |
| 134 | return 1; |
| 135 | } |
| 136 | if (o1_len < o2_len) |
| 137 | return -1; |
| 138 | if (o1_len > o2_len) |
| 139 | return 1; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | int |
| 145 | oid_compare_part (oid *o1, int o1_len, oid *o2, int o2_len) |
| 146 | { |
| 147 | int i; |
| 148 | |
| 149 | for (i = 0; i < min (o1_len, o2_len); i++) |
| 150 | { |
| 151 | if (o1[i] < o2[i]) |
| 152 | return -1; |
| 153 | else if (o1[i] > o2[i]) |
| 154 | return 1; |
| 155 | } |
| 156 | if (o1_len < o2_len) |
| 157 | return -1; |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | smux_oid_dump (char *prefix, oid *oid, size_t oid_len) |
| 164 | { |
| 165 | int i; |
| 166 | int first = 1; |
| 167 | char buf[MAX_OID_LEN * 3]; |
| 168 | |
| 169 | buf[0] = '\0'; |
| 170 | |
| 171 | for (i = 0; i < oid_len; i++) |
| 172 | { |
| 173 | sprintf (buf + strlen (buf), "%s%d", first ? "" : ".", (int) oid[i]); |
| 174 | first = 0; |
| 175 | } |
| 176 | zlog_info ("%s: %s", prefix, buf); |
| 177 | } |
| 178 | |
| 179 | int |
| 180 | smux_socket () |
| 181 | { |
| 182 | int ret; |
| 183 | #ifdef HAVE_IPV6 |
| 184 | struct addrinfo hints, *res0, *res; |
| 185 | int gai; |
| 186 | #else |
| 187 | struct sockaddr_in serv; |
| 188 | struct servent *sp; |
| 189 | #endif |
| 190 | int sock = 0; |
| 191 | |
| 192 | #ifdef HAVE_IPV6 |
| 193 | memset(&hints, 0, sizeof(hints)); |
| 194 | hints.ai_family = PF_UNSPEC; |
| 195 | hints.ai_socktype = SOCK_STREAM; |
| 196 | gai = getaddrinfo(NULL, "smux", &hints, &res0); |
| 197 | if (gai == EAI_SERVICE) |
| 198 | { |
| 199 | char servbuf[NI_MAXSERV]; |
| 200 | sprintf(servbuf,"%d",SMUX_PORT_DEFAULT); |
| 201 | servbuf[sizeof (servbuf) - 1] = '\0'; |
| 202 | gai = getaddrinfo(NULL, servbuf, &hints, &res0); |
| 203 | } |
| 204 | if (gai) |
| 205 | { |
| 206 | zlog_warn("Cannot locate loopback service smux"); |
| 207 | return -1; |
| 208 | } |
| 209 | for(res=res0; res; res=res->ai_next) |
| 210 | { |
| 211 | if (res->ai_family != AF_INET |
| 212 | #ifdef HAVE_IPV6 |
| 213 | && res->ai_family != AF_INET6 |
| 214 | #endif /* HAVE_IPV6 */ |
| 215 | ) |
| 216 | continue; |
| 217 | |
| 218 | sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); |
| 219 | if (sock < 0) |
| 220 | continue; |
| 221 | sockopt_reuseaddr (sock); |
| 222 | sockopt_reuseport (sock); |
| 223 | ret = connect (sock, res->ai_addr, res->ai_addrlen); |
| 224 | if (ret < 0) |
| 225 | { |
| 226 | close(sock); |
| 227 | sock = -1; |
| 228 | continue; |
| 229 | } |
| 230 | break; |
| 231 | } |
| 232 | freeaddrinfo(res0); |
| 233 | if (sock < 0) |
| 234 | zlog_warn ("Can't connect to SNMP agent with SMUX"); |
| 235 | #else |
| 236 | sock = socket (AF_INET, SOCK_STREAM, 0); |
| 237 | if (sock < 0) |
| 238 | { |
| 239 | zlog_warn ("Can't make socket for SNMP"); |
| 240 | return -1; |
| 241 | } |
| 242 | |
| 243 | memset (&serv, 0, sizeof (struct sockaddr_in)); |
| 244 | serv.sin_family = AF_INET; |
| 245 | #ifdef HAVE_SIN_LEN |
| 246 | serv.sin_len = sizeof (struct sockaddr_in); |
| 247 | #endif /* HAVE_SIN_LEN */ |
| 248 | |
| 249 | sp = getservbyname ("smux", "tcp"); |
| 250 | if (sp != NULL) |
| 251 | serv.sin_port = sp->s_port; |
| 252 | else |
| 253 | serv.sin_port = htons (SMUX_PORT_DEFAULT); |
| 254 | |
| 255 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); |
| 256 | |
| 257 | sockopt_reuseaddr (sock); |
| 258 | sockopt_reuseport (sock); |
| 259 | |
| 260 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (struct sockaddr_in)); |
| 261 | if (ret < 0) |
| 262 | { |
| 263 | close (sock); |
| 264 | smux_sock = -1; |
| 265 | zlog_warn ("Can't connect to SNMP agent with SMUX"); |
| 266 | return -1; |
| 267 | } |
| 268 | #endif |
| 269 | return sock; |
| 270 | } |
| 271 | |
| 272 | void |
| 273 | smux_getresp_send (oid objid[], size_t objid_len, long reqid, long errstat, |
| 274 | long errindex, u_char val_type, void *arg, size_t arg_len) |
| 275 | { |
| 276 | int ret; |
| 277 | u_char buf[BUFSIZ]; |
| 278 | u_char *ptr, *h1, *h1e, *h2, *h2e; |
| 279 | int len, length; |
| 280 | |
| 281 | ptr = buf; |
| 282 | len = BUFSIZ; |
| 283 | length = len; |
| 284 | |
| 285 | if (debug_smux) |
| 286 | { |
| 287 | zlog_info ("SMUX GETRSP send"); |
| 288 | zlog_info ("SMUX GETRSP reqid: %ld", reqid); |
| 289 | } |
| 290 | |
| 291 | h1 = ptr; |
| 292 | /* Place holder h1 for complete sequence */ |
| 293 | ptr = asn_build_sequence (ptr, &len, (u_char) SMUX_GETRSP, 0); |
| 294 | h1e = ptr; |
| 295 | |
| 296 | ptr = asn_build_int (ptr, &len, |
| 297 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 298 | &reqid, sizeof (reqid)); |
| 299 | |
| 300 | if (debug_smux) |
| 301 | zlog_info ("SMUX GETRSP errstat: %ld", errstat); |
| 302 | |
| 303 | ptr = asn_build_int (ptr, &len, |
| 304 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 305 | &errstat, sizeof (errstat)); |
| 306 | if (debug_smux) |
| 307 | zlog_info ("SMUX GETRSP errindex: %ld", errindex); |
| 308 | |
| 309 | ptr = asn_build_int (ptr, &len, |
| 310 | (u_char) (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 311 | &errindex, sizeof (errindex)); |
| 312 | |
| 313 | h2 = ptr; |
| 314 | /* Place holder h2 for one variable */ |
| 315 | ptr = asn_build_sequence (ptr, &len, |
| 316 | (u_char)(ASN_SEQUENCE | ASN_CONSTRUCTOR), |
| 317 | 0); |
| 318 | h2e = ptr; |
| 319 | |
| 320 | ptr = snmp_build_var_op (ptr, objid, &objid_len, |
| 321 | val_type, arg_len, arg, &len); |
| 322 | |
| 323 | /* Now variable size is known, fill in size */ |
| 324 | asn_build_sequence(h2,&length,(u_char)(ASN_SEQUENCE|ASN_CONSTRUCTOR),ptr-h2e); |
| 325 | |
| 326 | /* Fill in size of whole sequence */ |
| 327 | asn_build_sequence(h1,&length,(u_char)SMUX_GETRSP,ptr-h1e); |
| 328 | |
| 329 | if (debug_smux) |
| 330 | zlog_info ("SMUX getresp send: %d", ptr - buf); |
| 331 | |
| 332 | ret = send (smux_sock, buf, (ptr - buf), 0); |
| 333 | } |
| 334 | |
| 335 | char * |
| 336 | smux_var (char *ptr, int len, oid objid[], size_t *objid_len, |
| 337 | size_t *var_val_len, |
| 338 | u_char *var_val_type, |
| 339 | void **var_value) |
| 340 | { |
| 341 | u_char type; |
| 342 | u_char val_type; |
| 343 | size_t val_len; |
| 344 | u_char *val; |
| 345 | |
| 346 | if (debug_smux) |
| 347 | zlog_info ("SMUX var parse: len %d", len); |
| 348 | |
| 349 | /* Parse header. */ |
| 350 | ptr = asn_parse_header (ptr, &len, &type); |
| 351 | |
| 352 | if (debug_smux) |
| 353 | { |
| 354 | zlog_info ("SMUX var parse: type %d len %d", type, len); |
| 355 | zlog_info ("SMUX var parse: type must be %d", |
| 356 | (ASN_SEQUENCE | ASN_CONSTRUCTOR)); |
| 357 | } |
| 358 | |
| 359 | /* Parse var option. */ |
| 360 | *objid_len = MAX_OID_LEN; |
| 361 | ptr = snmp_parse_var_op(ptr, objid, objid_len, &val_type, |
| 362 | &val_len, &val, &len); |
| 363 | |
| 364 | if (var_val_len) |
| 365 | *var_val_len = val_len; |
| 366 | |
| 367 | if (var_value) |
| 368 | *var_value = (void*) val; |
| 369 | |
| 370 | if (var_val_type) |
| 371 | *var_val_type = val_type; |
| 372 | |
| 373 | /* Requested object id length is objid_len. */ |
| 374 | if (debug_smux) |
| 375 | smux_oid_dump ("Request OID", objid, *objid_len); |
| 376 | |
| 377 | if (debug_smux) |
| 378 | zlog_info ("SMUX val_type: %d", val_type); |
| 379 | |
| 380 | /* Check request value type. */ |
| 381 | if (debug_smux) |
| 382 | switch (val_type) |
| 383 | { |
| 384 | case ASN_NULL: |
| 385 | /* In case of SMUX_GET or SMUX_GET_NEXT val_type is set to |
| 386 | ASN_NULL. */ |
| 387 | zlog_info ("ASN_NULL"); |
| 388 | break; |
| 389 | |
| 390 | case ASN_INTEGER: |
| 391 | zlog_info ("ASN_INTEGER"); |
| 392 | break; |
| 393 | case ASN_COUNTER: |
| 394 | case ASN_GAUGE: |
| 395 | case ASN_TIMETICKS: |
| 396 | case ASN_UINTEGER: |
| 397 | zlog_info ("ASN_COUNTER"); |
| 398 | break; |
| 399 | case ASN_COUNTER64: |
| 400 | zlog_info ("ASN_COUNTER64"); |
| 401 | break; |
| 402 | case ASN_IPADDRESS: |
| 403 | zlog_info ("ASN_IPADDRESS"); |
| 404 | break; |
| 405 | case ASN_OCTET_STR: |
| 406 | zlog_info ("ASN_OCTET_STR"); |
| 407 | break; |
| 408 | case ASN_OPAQUE: |
| 409 | case ASN_NSAP: |
| 410 | case ASN_OBJECT_ID: |
| 411 | zlog_info ("ASN_OPAQUE"); |
| 412 | break; |
| 413 | case SNMP_NOSUCHOBJECT: |
| 414 | zlog_info ("SNMP_NOSUCHOBJECT"); |
| 415 | break; |
| 416 | case SNMP_NOSUCHINSTANCE: |
| 417 | zlog_info ("SNMP_NOSUCHINSTANCE"); |
| 418 | break; |
| 419 | case SNMP_ENDOFMIBVIEW: |
| 420 | zlog_info ("SNMP_ENDOFMIBVIEW"); |
| 421 | break; |
| 422 | case ASN_BIT_STR: |
| 423 | zlog_info ("ASN_BIT_STR"); |
| 424 | break; |
| 425 | default: |
| 426 | zlog_info ("Unknown type"); |
| 427 | break; |
| 428 | } |
| 429 | return ptr; |
| 430 | } |
| 431 | |
| 432 | /* NOTE: all 3 functions (smux_set, smux_get & smux_getnext) are based on |
| 433 | ucd-snmp smux and as such suppose, that the peer receives in the message |
| 434 | only one variable. Fortunately, IBM seems to do the same in AIX. */ |
| 435 | |
| 436 | int |
| 437 | smux_set (oid *reqid, size_t *reqid_len, |
| 438 | u_char val_type, void *val, size_t val_len, int action) |
| 439 | { |
| 440 | int j; |
| 441 | struct subtree *subtree; |
| 442 | struct variable *v; |
| 443 | int subresult; |
| 444 | oid *suffix; |
| 445 | int suffix_len; |
| 446 | int result; |
| 447 | u_char *statP = NULL; |
| 448 | WriteMethod *write_method = NULL; |
| 449 | struct listnode *node; |
| 450 | |
| 451 | /* Check */ |
| 452 | for (node = treelist->head; node; node = node->next) |
| 453 | { |
| 454 | subtree = node->data; |
| 455 | subresult = oid_compare_part (reqid, *reqid_len, |
| 456 | subtree->name, subtree->name_len); |
| 457 | |
| 458 | /* Subtree matched. */ |
| 459 | if (subresult == 0) |
| 460 | { |
| 461 | /* Prepare suffix. */ |
| 462 | suffix = reqid + subtree->name_len; |
| 463 | suffix_len = *reqid_len - subtree->name_len; |
| 464 | result = subresult; |
| 465 | |
| 466 | /* Check variables. */ |
| 467 | for (j = 0; j < subtree->variables_num; j++) |
| 468 | { |
| 469 | v = &subtree->variables[j]; |
| 470 | |
| 471 | /* Always check suffix */ |
| 472 | result = oid_compare_part (suffix, suffix_len, |
| 473 | v->name, v->namelen); |
| 474 | |
| 475 | /* This is exact match so result must be zero. */ |
| 476 | if (result == 0) |
| 477 | { |
| 478 | if (debug_smux) |
| 479 | zlog_info ("SMUX function call index is %d", v->magic); |
| 480 | |
| 481 | statP = (*v->findVar) (v, suffix, &suffix_len, 1, |
| 482 | &val_len, &write_method); |
| 483 | |
| 484 | if (write_method) |
| 485 | { |
| 486 | return (*write_method)(action, val, val_type, val_len, |
| 487 | statP, suffix, suffix_len, v); |
| 488 | } |
| 489 | else |
| 490 | { |
| 491 | return SNMP_ERR_READONLY; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | /* If above execution is failed or oid is small (so |
| 496 | there is no further match). */ |
| 497 | if (result < 0) |
| 498 | return SNMP_ERR_NOSUCHNAME; |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | return SNMP_ERR_NOSUCHNAME; |
| 503 | } |
| 504 | |
| 505 | int |
| 506 | smux_get (oid *reqid, size_t *reqid_len, int exact, |
| 507 | u_char *val_type,void **val, size_t *val_len) |
| 508 | { |
| 509 | int j; |
| 510 | struct subtree *subtree; |
| 511 | struct variable *v; |
| 512 | int subresult; |
| 513 | oid *suffix; |
| 514 | int suffix_len; |
| 515 | int result; |
| 516 | WriteMethod *write_method=NULL; |
| 517 | struct listnode *node; |
| 518 | |
| 519 | /* Check */ |
| 520 | for (node = treelist->head; node; node = node->next) |
| 521 | { |
| 522 | subtree = node->data; |
| 523 | subresult = oid_compare_part (reqid, *reqid_len, |
| 524 | subtree->name, subtree->name_len); |
| 525 | |
| 526 | /* Subtree matched. */ |
| 527 | if (subresult == 0) |
| 528 | { |
| 529 | /* Prepare suffix. */ |
| 530 | suffix = reqid + subtree->name_len; |
| 531 | suffix_len = *reqid_len - subtree->name_len; |
| 532 | result = subresult; |
| 533 | |
| 534 | /* Check variables. */ |
| 535 | for (j = 0; j < subtree->variables_num; j++) |
| 536 | { |
| 537 | v = &subtree->variables[j]; |
| 538 | |
| 539 | /* Always check suffix */ |
| 540 | result = oid_compare_part (suffix, suffix_len, |
| 541 | v->name, v->namelen); |
| 542 | |
| 543 | /* This is exact match so result must be zero. */ |
| 544 | if (result == 0) |
| 545 | { |
| 546 | if (debug_smux) |
| 547 | zlog_info ("SMUX function call index is %d", v->magic); |
| 548 | |
| 549 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, |
| 550 | val_len, &write_method); |
| 551 | |
| 552 | /* There is no instance. */ |
| 553 | if (*val == NULL) |
| 554 | return SNMP_NOSUCHINSTANCE; |
| 555 | |
| 556 | /* Call is suceed. */ |
| 557 | *val_type = v->type; |
| 558 | |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | /* If above execution is failed or oid is small (so |
| 563 | there is no further match). */ |
| 564 | if (result < 0) |
| 565 | return SNMP_ERR_NOSUCHNAME; |
| 566 | } |
| 567 | } |
| 568 | } |
| 569 | return SNMP_ERR_NOSUCHNAME; |
| 570 | } |
| 571 | |
| 572 | int |
| 573 | smux_getnext (oid *reqid, size_t *reqid_len, int exact, |
| 574 | u_char *val_type,void **val, size_t *val_len) |
| 575 | { |
| 576 | int j; |
| 577 | oid save[MAX_OID_LEN]; |
| 578 | int savelen = 0; |
| 579 | struct subtree *subtree; |
| 580 | struct variable *v; |
| 581 | int subresult; |
| 582 | oid *suffix; |
| 583 | int suffix_len; |
| 584 | int result; |
| 585 | WriteMethod *write_method=NULL; |
| 586 | struct listnode *node; |
| 587 | |
| 588 | |
| 589 | /* Save incoming request. */ |
| 590 | oid_copy (save, reqid, *reqid_len); |
| 591 | savelen = *reqid_len; |
| 592 | |
| 593 | /* Check */ |
| 594 | for (node = treelist->head; node; node = node->next) |
| 595 | { |
| 596 | subtree = node->data; |
| 597 | subresult = oid_compare_part (reqid, *reqid_len, |
| 598 | subtree->name, subtree->name_len); |
| 599 | |
| 600 | /* If request is in the tree. The agent has to make sure we |
| 601 | only receive requests we have registered for. */ |
| 602 | /* Unfortunately, that's not true. In fact, a SMUX subagent has to |
| 603 | behave as if it manages the whole SNMP MIB tree itself. It's the |
| 604 | duty of the master agent to collect the best answer and return it |
| 605 | to the manager. See RFC 1227 chapter 3.1.6 for the glory details |
| 606 | :-). ucd-snmp really behaves bad here as it actually might ask |
| 607 | multiple times for the same GETNEXT request as it throws away the |
| 608 | answer when it expects it in a different subtree and might come |
| 609 | back later with the very same request. --jochen */ |
| 610 | |
| 611 | if (subresult <= 0) |
| 612 | { |
| 613 | /* Prepare suffix. */ |
| 614 | suffix = reqid + subtree->name_len; |
| 615 | suffix_len = *reqid_len - subtree->name_len; |
| 616 | if (subresult < 0) |
| 617 | { |
| 618 | oid_copy(reqid, subtree->name, subtree->name_len); |
| 619 | *reqid_len = subtree->name_len; |
| 620 | } |
| 621 | for (j = 0; j < subtree->variables_num; j++) |
| 622 | { |
| 623 | result = subresult; |
| 624 | v = &subtree->variables[j]; |
| 625 | |
| 626 | /* Next then check result >= 0. */ |
| 627 | if (result == 0) |
| 628 | result = oid_compare_part (suffix, suffix_len, |
| 629 | v->name, v->namelen); |
| 630 | |
| 631 | if (result <= 0) |
| 632 | { |
| 633 | if (debug_smux) |
| 634 | zlog_info ("SMUX function call index is %d", v->magic); |
| 635 | if(result<0) |
| 636 | { |
| 637 | oid_copy(suffix, v->name, v->namelen); |
| 638 | suffix_len = v->namelen; |
| 639 | } |
| 640 | *val = (*v->findVar) (v, suffix, &suffix_len, exact, |
| 641 | val_len, &write_method); |
| 642 | *reqid_len = suffix_len + subtree->name_len; |
| 643 | if (*val) |
| 644 | { |
| 645 | *val_type = v->type; |
| 646 | return 0; |
| 647 | } |
| 648 | } |
| 649 | } |
| 650 | } |
| 651 | } |
| 652 | memcpy (reqid, save, savelen * sizeof(oid)); |
| 653 | *reqid_len = savelen; |
| 654 | |
| 655 | return SNMP_ERR_NOSUCHNAME; |
| 656 | } |
| 657 | |
| 658 | /* GET message header. */ |
| 659 | char * |
| 660 | smux_parse_get_header (char *ptr, size_t *len, long *reqid) |
| 661 | { |
| 662 | u_char type; |
| 663 | long errstat; |
| 664 | long errindex; |
| 665 | |
| 666 | /* Request ID. */ |
| 667 | ptr = asn_parse_int (ptr, len, &type, reqid, sizeof (*reqid)); |
| 668 | |
| 669 | if (debug_smux) |
| 670 | zlog_info ("SMUX GET reqid: %d len: %d", (int) *reqid, (int) *len); |
| 671 | |
| 672 | /* Error status. */ |
| 673 | ptr = asn_parse_int (ptr, len, &type, &errstat, sizeof (errstat)); |
| 674 | |
| 675 | if (debug_smux) |
| 676 | zlog_info ("SMUX GET errstat %ld len: %d", errstat, *len); |
| 677 | |
| 678 | /* Error index. */ |
| 679 | ptr = asn_parse_int (ptr, len, &type, &errindex, sizeof (errindex)); |
| 680 | |
| 681 | if (debug_smux) |
| 682 | zlog_info ("SMUX GET errindex %ld len: %d", errindex, *len); |
| 683 | |
| 684 | return ptr; |
| 685 | } |
| 686 | |
| 687 | void |
| 688 | smux_parse_set (char *ptr, size_t len, int action) |
| 689 | { |
| 690 | long reqid; |
| 691 | oid oid[MAX_OID_LEN]; |
| 692 | size_t oid_len; |
| 693 | u_char val_type; |
| 694 | void *val; |
| 695 | size_t val_len; |
| 696 | int ret; |
| 697 | |
| 698 | if (debug_smux) |
| 699 | zlog_info ("SMUX SET(%s) message parse: len %d", |
| 700 | (RESERVE1 == action) ? "RESERVE1" : ((FREE == action) ? "FREE" : "COMMIT"), |
| 701 | len); |
| 702 | |
| 703 | /* Parse SET message header. */ |
| 704 | ptr = smux_parse_get_header (ptr, &len, &reqid); |
| 705 | |
| 706 | /* Parse SET message object ID. */ |
| 707 | ptr = smux_var (ptr, len, oid, &oid_len, &val_len, &val_type, &val); |
| 708 | |
| 709 | ret = smux_set (oid, &oid_len, val_type, val, val_len, action); |
| 710 | if (debug_smux) |
| 711 | zlog_info ("SMUX SET ret %d", ret); |
| 712 | |
| 713 | /* Return result. */ |
| 714 | if (RESERVE1 == action) |
| 715 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); |
| 716 | } |
| 717 | |
| 718 | void |
| 719 | smux_parse_get (char *ptr, size_t len, int exact) |
| 720 | { |
| 721 | long reqid; |
| 722 | oid oid[MAX_OID_LEN]; |
| 723 | size_t oid_len; |
| 724 | u_char val_type; |
| 725 | void *val; |
| 726 | size_t val_len; |
| 727 | int ret; |
| 728 | |
| 729 | if (debug_smux) |
| 730 | zlog_info ("SMUX GET message parse: len %d", len); |
| 731 | |
| 732 | /* Parse GET message header. */ |
| 733 | ptr = smux_parse_get_header (ptr, &len, &reqid); |
| 734 | |
| 735 | /* Parse GET message object ID. We needn't the value come */ |
| 736 | ptr = smux_var (ptr, len, oid, &oid_len, NULL, NULL, NULL); |
| 737 | |
| 738 | /* Traditional getstatptr. */ |
| 739 | if (exact) |
| 740 | ret = smux_get (oid, &oid_len, exact, &val_type, &val, &val_len); |
| 741 | else |
| 742 | ret = smux_getnext (oid, &oid_len, exact, &val_type, &val, &val_len); |
| 743 | |
| 744 | /* Return result. */ |
| 745 | if (ret == 0) |
| 746 | smux_getresp_send (oid, oid_len, reqid, 0, 0, val_type, val, val_len); |
| 747 | else |
| 748 | smux_getresp_send (oid, oid_len, reqid, ret, 3, ASN_NULL, NULL, 0); |
| 749 | } |
| 750 | |
| 751 | /* Parse SMUX_CLOSE message. */ |
| 752 | void |
| 753 | smux_parse_close (char *ptr, int len) |
| 754 | { |
| 755 | long reason = 0; |
| 756 | |
| 757 | while (len--) |
| 758 | { |
| 759 | reason = (reason << 8) | (long) *ptr; |
| 760 | ptr++; |
| 761 | } |
| 762 | zlog_info ("SMUX_CLOSE with reason: %ld", reason); |
| 763 | } |
| 764 | |
| 765 | /* SMUX_RRSP message. */ |
| 766 | void |
| 767 | smux_parse_rrsp (char *ptr, int len) |
| 768 | { |
| 769 | char val; |
| 770 | long errstat; |
| 771 | |
| 772 | ptr = asn_parse_int (ptr, &len, &val, &errstat, sizeof (errstat)); |
| 773 | |
| 774 | if (debug_smux) |
| 775 | zlog_info ("SMUX_RRSP value: %d errstat: %ld", val, errstat); |
| 776 | } |
| 777 | |
| 778 | /* Parse SMUX message. */ |
| 779 | int |
| 780 | smux_parse (char *ptr, int len) |
| 781 | { |
| 782 | /* This buffer we'll use for SOUT message. We could allocate it with |
| 783 | malloc and save only static pointer/lenght, but IMHO static |
| 784 | buffer is a faster solusion. */ |
| 785 | static u_char sout_save_buff[SMUXMAXPKTSIZE]; |
| 786 | static int sout_save_len = 0; |
| 787 | |
| 788 | int len_income = len; /* see note below: YYY */ |
| 789 | u_char type; |
| 790 | u_char rollback; |
| 791 | |
| 792 | rollback = ptr[2]; /* important only for SMUX_SOUT */ |
| 793 | |
| 794 | process_rest: /* see note below: YYY */ |
| 795 | |
| 796 | /* Parse SMUX message type and subsequent length. */ |
| 797 | ptr = asn_parse_header (ptr, &len, &type); |
| 798 | |
| 799 | if (debug_smux) |
| 800 | zlog_info ("SMUX message received type: %d rest len: %d", type, len); |
| 801 | |
| 802 | switch (type) |
| 803 | { |
| 804 | case SMUX_OPEN: |
| 805 | /* Open must be not send from SNMP agent. */ |
| 806 | zlog_warn ("SMUX_OPEN received: resetting connection."); |
| 807 | return -1; |
| 808 | break; |
| 809 | case SMUX_RREQ: |
| 810 | /* SMUX_RREQ message is invalid for us. */ |
| 811 | zlog_warn ("SMUX_RREQ received: resetting connection."); |
| 812 | return -1; |
| 813 | break; |
| 814 | case SMUX_SOUT: |
| 815 | /* SMUX_SOUT message is now valied for us. */ |
| 816 | if (debug_smux) |
| 817 | zlog_info ("SMUX_SOUT(%s)", rollback ? "rollback" : "commit"); |
| 818 | |
| 819 | if (sout_save_len > 0) |
| 820 | { |
| 821 | smux_parse_set (sout_save_buff, sout_save_len, rollback ? FREE : COMMIT); |
| 822 | sout_save_len = 0; |
| 823 | } |
| 824 | else |
| 825 | zlog_warn ("SMUX_SOUT sout_save_len=%d - invalid", (int) sout_save_len); |
| 826 | |
| 827 | if (len_income > 3) |
| 828 | { |
| 829 | /* YYY: this strange code has to solve the "slow peer" |
| 830 | problem: When agent sends SMUX_SOUT message it doesn't |
| 831 | wait any responce and may send some next message to |
| 832 | subagent. Then the peer in 'smux_read()' will recieve |
| 833 | from socket the 'concatenated' buffer, contaning both |
| 834 | SMUX_SOUT message and the next one |
| 835 | (SMUX_GET/SMUX_GETNEXT/SMUX_GET). So we should check: if |
| 836 | the buffer is longer than 3 ( length of SMUX_SOUT ), we |
| 837 | must process the rest of it. This effect may be observed |
| 838 | if 'debug_smux' is set to '1' */ |
| 839 | ptr++; |
| 840 | len = len_income - 3; |
| 841 | goto process_rest; |
| 842 | } |
| 843 | break; |
| 844 | case SMUX_GETRSP: |
| 845 | /* SMUX_GETRSP message is invalid for us. */ |
| 846 | zlog_warn ("SMUX_GETRSP received: resetting connection."); |
| 847 | return -1; |
| 848 | break; |
| 849 | case SMUX_CLOSE: |
| 850 | /* Close SMUX connection. */ |
| 851 | if (debug_smux) |
| 852 | zlog_info ("SMUX_CLOSE"); |
| 853 | smux_parse_close (ptr, len); |
| 854 | return -1; |
| 855 | break; |
| 856 | case SMUX_RRSP: |
| 857 | /* This is response for register message. */ |
| 858 | if (debug_smux) |
| 859 | zlog_info ("SMUX_RRSP"); |
| 860 | smux_parse_rrsp (ptr, len); |
| 861 | break; |
| 862 | case SMUX_GET: |
| 863 | /* Exact request for object id. */ |
| 864 | if (debug_smux) |
| 865 | zlog_info ("SMUX_GET"); |
| 866 | smux_parse_get (ptr, len, 1); |
| 867 | break; |
| 868 | case SMUX_GETNEXT: |
| 869 | /* Next request for object id. */ |
| 870 | if (debug_smux) |
| 871 | zlog_info ("SMUX_GETNEXT"); |
| 872 | smux_parse_get (ptr, len, 0); |
| 873 | break; |
| 874 | case SMUX_SET: |
| 875 | /* SMUX_SET is supported with some limitations. */ |
| 876 | if (debug_smux) |
| 877 | zlog_info ("SMUX_SET"); |
| 878 | |
| 879 | /* save the data for future SMUX_SOUT */ |
| 880 | memcpy (sout_save_buff, ptr, len); |
| 881 | sout_save_len = len; |
| 882 | smux_parse_set (ptr, len, RESERVE1); |
| 883 | break; |
| 884 | default: |
| 885 | zlog_info ("Unknown type: %d", type); |
| 886 | break; |
| 887 | } |
| 888 | return 0; |
| 889 | } |
| 890 | |
| 891 | /* SMUX message read function. */ |
| 892 | int |
| 893 | smux_read (struct thread *t) |
| 894 | { |
| 895 | int sock; |
| 896 | int len; |
| 897 | u_char buf[SMUXMAXPKTSIZE]; |
| 898 | int ret; |
| 899 | |
| 900 | /* Clear thread. */ |
| 901 | sock = THREAD_FD (t); |
| 902 | smux_read_thread = NULL; |
| 903 | |
| 904 | if (debug_smux) |
| 905 | zlog_info ("SMUX read start"); |
| 906 | |
| 907 | /* Read message from SMUX socket. */ |
| 908 | len = recv (sock, buf, SMUXMAXPKTSIZE, 0); |
| 909 | |
| 910 | if (len < 0) |
| 911 | { |
| 912 | zlog_warn ("Can't read all SMUX packet: %s", strerror (errno)); |
| 913 | close (sock); |
| 914 | smux_sock = -1; |
| 915 | smux_event (SMUX_CONNECT, 0); |
| 916 | return -1; |
| 917 | } |
| 918 | |
| 919 | if (len == 0) |
| 920 | { |
| 921 | zlog_warn ("SMUX connection closed: %d", sock); |
| 922 | close (sock); |
| 923 | smux_sock = -1; |
| 924 | smux_event (SMUX_CONNECT, 0); |
| 925 | return -1; |
| 926 | } |
| 927 | |
| 928 | if (debug_smux) |
| 929 | zlog_info ("SMUX read len: %d", len); |
| 930 | |
| 931 | /* Parse the message. */ |
| 932 | ret = smux_parse (buf, len); |
| 933 | |
| 934 | if (ret < 0) |
| 935 | { |
| 936 | close (sock); |
| 937 | smux_sock = -1; |
| 938 | smux_event (SMUX_CONNECT, 0); |
| 939 | return -1; |
| 940 | } |
| 941 | |
| 942 | /* Regiser read thread. */ |
| 943 | smux_event (SMUX_READ, sock); |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | int |
| 949 | smux_open (int sock) |
| 950 | { |
| 951 | u_char buf[BUFSIZ]; |
| 952 | u_char *ptr; |
| 953 | int len; |
| 954 | u_long version; |
paul | 42053f4 | 2003-08-13 02:54:44 +0000 | [diff] [blame] | 955 | u_char progname[] = QUAGGA_PROGNAME "-" QUAGGA_VERSION; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 956 | |
| 957 | if (debug_smux) |
| 958 | { |
| 959 | smux_oid_dump ("SMUX open oid", smux_oid, smux_oid_len); |
| 960 | zlog_info ("SMUX open progname: %s", progname); |
| 961 | zlog_info ("SMUX open password: %s", smux_passwd); |
| 962 | } |
| 963 | |
| 964 | ptr = buf; |
| 965 | len = BUFSIZ; |
| 966 | |
| 967 | /* SMUX Header. As placeholder. */ |
| 968 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_OPEN, 0); |
| 969 | |
| 970 | /* SMUX Open. */ |
| 971 | version = 0; |
| 972 | ptr = asn_build_int (ptr, &len, |
| 973 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 974 | &version, sizeof (u_long)); |
| 975 | |
| 976 | /* SMUX connection oid. */ |
| 977 | ptr = asn_build_objid (ptr, &len, |
| 978 | (u_char) |
| 979 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), |
| 980 | smux_oid, smux_oid_len); |
| 981 | |
| 982 | /* SMUX connection description. */ |
| 983 | ptr = asn_build_string (ptr, &len, |
| 984 | (u_char) |
| 985 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), |
| 986 | progname, strlen (progname)); |
| 987 | |
| 988 | /* SMUX connection password. */ |
| 989 | ptr = asn_build_string (ptr, &len, |
| 990 | (u_char) |
| 991 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OCTET_STR), |
| 992 | smux_passwd, strlen (smux_passwd)); |
| 993 | |
| 994 | /* Fill in real SMUX header. We exclude ASN header size (2). */ |
| 995 | len = BUFSIZ; |
| 996 | asn_build_header (buf, &len, (u_char) SMUX_OPEN, (ptr - buf) - 2); |
| 997 | |
| 998 | return send (sock, buf, (ptr - buf), 0); |
| 999 | } |
| 1000 | |
| 1001 | int |
| 1002 | smux_trap (oid *name, size_t namelen, |
| 1003 | oid *iname, size_t inamelen, |
| 1004 | struct trap_object *trapobj, size_t trapobjlen, |
paul | 020709f | 2003-04-04 02:44:16 +0000 | [diff] [blame] | 1005 | unsigned int tick, u_char sptrap) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1006 | { |
| 1007 | int i; |
| 1008 | u_char buf[BUFSIZ]; |
| 1009 | u_char *ptr; |
| 1010 | int len, length; |
| 1011 | struct in_addr addr; |
| 1012 | unsigned long val; |
| 1013 | u_char *h1, *h1e; |
| 1014 | |
| 1015 | ptr = buf; |
| 1016 | len = BUFSIZ; |
| 1017 | length = len; |
| 1018 | |
| 1019 | /* When SMUX connection is not established. */ |
| 1020 | if (smux_sock < 0) |
| 1021 | return 0; |
| 1022 | |
| 1023 | /* SMUX header. */ |
| 1024 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_TRAP, 0); |
| 1025 | |
| 1026 | /* Sub agent enterprise oid. */ |
| 1027 | ptr = asn_build_objid (ptr, &len, |
| 1028 | (u_char) |
| 1029 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), |
| 1030 | smux_oid, smux_oid_len); |
| 1031 | |
| 1032 | /* IP address. */ |
| 1033 | addr.s_addr = 0; |
| 1034 | ptr = asn_build_string (ptr, &len, |
| 1035 | (u_char) |
| 1036 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_IPADDRESS), |
| 1037 | (u_char *)&addr, sizeof (struct in_addr)); |
| 1038 | |
| 1039 | /* Generic trap integer. */ |
| 1040 | val = SNMP_TRAP_ENTERPRISESPECIFIC; |
| 1041 | ptr = asn_build_int (ptr, &len, |
| 1042 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 1043 | &val, sizeof (int)); |
| 1044 | |
| 1045 | /* Specific trap integer. */ |
paul | 020709f | 2003-04-04 02:44:16 +0000 | [diff] [blame] | 1046 | val = sptrap; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1047 | ptr = asn_build_int (ptr, &len, |
| 1048 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 1049 | &val, sizeof (int)); |
| 1050 | |
| 1051 | /* Timeticks timestamp. */ |
| 1052 | val = 0; |
| 1053 | ptr = asn_build_unsigned_int (ptr, &len, |
| 1054 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_TIMETICKS), |
| 1055 | &val, sizeof (int)); |
| 1056 | |
| 1057 | /* Variables. */ |
| 1058 | h1 = ptr; |
| 1059 | ptr = asn_build_sequence (ptr, &len, |
| 1060 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), |
| 1061 | 0); |
| 1062 | |
| 1063 | |
| 1064 | /* Iteration for each objects. */ |
| 1065 | h1e = ptr; |
| 1066 | for (i = 0; i < trapobjlen; i++) |
| 1067 | { |
| 1068 | int ret; |
| 1069 | oid oid[MAX_OID_LEN]; |
| 1070 | size_t oid_len; |
| 1071 | void *val; |
| 1072 | size_t val_len; |
| 1073 | u_char val_type; |
| 1074 | |
| 1075 | /* Make OID. */ |
| 1076 | oid_copy (oid, name, namelen); |
| 1077 | oid_copy (oid + namelen, trapobj[i].name, trapobj[i].namelen); |
| 1078 | oid_copy (oid + namelen + trapobj[i].namelen, iname, inamelen); |
| 1079 | oid_len = namelen + trapobj[i].namelen + inamelen; |
| 1080 | |
| 1081 | if (debug_smux) |
| 1082 | smux_oid_dump ("Trap", oid, oid_len); |
| 1083 | |
| 1084 | ret = smux_get (oid, &oid_len, 1, &val_type, &val, &val_len); |
| 1085 | |
| 1086 | if (debug_smux) |
| 1087 | zlog_info ("smux_get result %d", ret); |
| 1088 | |
| 1089 | if (ret == 0) |
| 1090 | ptr = snmp_build_var_op (ptr, oid, &oid_len, |
| 1091 | val_type, val_len, val, &len); |
| 1092 | } |
| 1093 | |
| 1094 | /* Now variable size is known, fill in size */ |
| 1095 | asn_build_sequence(h1, &length, |
| 1096 | (u_char) (ASN_SEQUENCE | ASN_CONSTRUCTOR), |
| 1097 | ptr - h1e); |
| 1098 | |
| 1099 | /* Fill in size of whole sequence */ |
| 1100 | len = BUFSIZ; |
| 1101 | asn_build_header (buf, &len, (u_char) SMUX_TRAP, (ptr - buf) - 2); |
| 1102 | |
| 1103 | return send (smux_sock, buf, (ptr - buf), 0); |
| 1104 | } |
| 1105 | |
| 1106 | int |
| 1107 | smux_register (int sock) |
| 1108 | { |
| 1109 | u_char buf[BUFSIZ]; |
| 1110 | u_char *ptr; |
| 1111 | int len, ret; |
| 1112 | long priority; |
| 1113 | long operation; |
| 1114 | struct subtree *subtree; |
| 1115 | struct listnode *node; |
| 1116 | |
| 1117 | ret = 0; |
| 1118 | |
| 1119 | for (node = treelist->head; node; node = node->next) |
| 1120 | { |
| 1121 | ptr = buf; |
| 1122 | len = BUFSIZ; |
| 1123 | |
| 1124 | subtree = node->data; |
| 1125 | |
| 1126 | /* SMUX RReq Header. */ |
| 1127 | ptr = asn_build_header (ptr, &len, (u_char) SMUX_RREQ, 0); |
| 1128 | |
| 1129 | /* Register MIB tree. */ |
| 1130 | ptr = asn_build_objid (ptr, &len, |
| 1131 | (u_char) |
| 1132 | (ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_OBJECT_ID), |
| 1133 | subtree->name, subtree->name_len); |
| 1134 | |
| 1135 | /* Priority. */ |
| 1136 | priority = -1; |
| 1137 | ptr = asn_build_int (ptr, &len, |
| 1138 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 1139 | &priority, sizeof (u_long)); |
| 1140 | |
| 1141 | /* Operation. */ |
| 1142 | operation = 2; /* Register R/W */ |
| 1143 | ptr = asn_build_int (ptr, &len, |
| 1144 | (u_char)(ASN_UNIVERSAL | ASN_PRIMITIVE | ASN_INTEGER), |
| 1145 | &operation, sizeof (u_long)); |
| 1146 | |
| 1147 | if (debug_smux) |
| 1148 | { |
| 1149 | smux_oid_dump ("SMUX register oid", subtree->name, subtree->name_len); |
| 1150 | zlog_info ("SMUX register priority: %ld", priority); |
| 1151 | zlog_info ("SMUX register operation: %ld", operation); |
| 1152 | } |
| 1153 | |
| 1154 | len = BUFSIZ; |
| 1155 | asn_build_header (buf, &len, (u_char) SMUX_RREQ, (ptr - buf) - 2); |
| 1156 | ret = send (sock, buf, (ptr - buf), 0); |
| 1157 | if (ret < 0) |
| 1158 | return ret; |
| 1159 | } |
| 1160 | return ret; |
| 1161 | } |
| 1162 | |
| 1163 | /* Try to connect to SNMP agent. */ |
| 1164 | int |
| 1165 | smux_connect (struct thread *t) |
| 1166 | { |
| 1167 | int ret; |
| 1168 | |
| 1169 | if (debug_smux) |
| 1170 | zlog_info ("SMUX connect try %d", fail + 1); |
| 1171 | |
| 1172 | /* Clear thread poner of myself. */ |
| 1173 | smux_connect_thread = NULL; |
| 1174 | |
| 1175 | /* Make socket. Try to connect. */ |
| 1176 | smux_sock = smux_socket (); |
| 1177 | if (smux_sock < 0) |
| 1178 | { |
| 1179 | if (++fail < SMUX_MAX_FAILURE) |
| 1180 | smux_event (SMUX_CONNECT, 0); |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | /* Send OPEN PDU. */ |
| 1185 | ret = smux_open (smux_sock); |
| 1186 | if (ret < 0) |
| 1187 | { |
| 1188 | zlog_warn ("SMUX open message send failed: %s", strerror (errno)); |
| 1189 | close (smux_sock); |
| 1190 | smux_sock = -1; |
| 1191 | if (++fail < SMUX_MAX_FAILURE) |
| 1192 | smux_event (SMUX_CONNECT, 0); |
| 1193 | return -1; |
| 1194 | } |
| 1195 | |
| 1196 | /* Send any outstanding register PDUs. */ |
| 1197 | ret = smux_register (smux_sock); |
| 1198 | if (ret < 0) |
| 1199 | { |
| 1200 | zlog_warn ("SMUX register message send failed: %s", strerror (errno)); |
| 1201 | close (smux_sock); |
| 1202 | smux_sock = -1; |
| 1203 | if (++fail < SMUX_MAX_FAILURE) |
| 1204 | smux_event (SMUX_CONNECT, 0); |
| 1205 | return -1; |
| 1206 | } |
| 1207 | |
| 1208 | /* Everything goes fine. */ |
| 1209 | smux_event (SMUX_READ, smux_sock); |
| 1210 | |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
| 1214 | /* Clear all SMUX related resources. */ |
| 1215 | void |
| 1216 | smux_stop () |
| 1217 | { |
| 1218 | if (smux_read_thread) |
| 1219 | thread_cancel (smux_read_thread); |
| 1220 | if (smux_connect_thread) |
| 1221 | thread_cancel (smux_connect_thread); |
| 1222 | |
| 1223 | if (smux_sock >= 0) |
| 1224 | { |
| 1225 | close (smux_sock); |
| 1226 | smux_sock = -1; |
| 1227 | } |
| 1228 | } |
| 1229 | |
paul | dd488a7 | 2003-06-19 01:21:07 +0000 | [diff] [blame] | 1230 | |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1231 | |
| 1232 | void |
| 1233 | smux_event (enum smux_event event, int sock) |
| 1234 | { |
| 1235 | switch (event) |
| 1236 | { |
| 1237 | case SMUX_SCHEDULE: |
| 1238 | smux_connect_thread = thread_add_event (master, smux_connect, NULL, 0); |
| 1239 | break; |
| 1240 | case SMUX_CONNECT: |
| 1241 | smux_connect_thread = thread_add_timer (master, smux_connect, NULL, 10); |
| 1242 | break; |
| 1243 | case SMUX_READ: |
| 1244 | smux_read_thread = thread_add_read (master, smux_read, NULL, sock); |
| 1245 | break; |
| 1246 | default: |
| 1247 | break; |
| 1248 | } |
| 1249 | } |
| 1250 | |
| 1251 | int |
| 1252 | smux_str2oid (char *str, oid *oid, size_t *oid_len) |
| 1253 | { |
| 1254 | int len; |
| 1255 | int val; |
| 1256 | |
| 1257 | len = 0; |
| 1258 | val = 0; |
| 1259 | *oid_len = 0; |
| 1260 | |
| 1261 | if (*str == '.') |
| 1262 | str++; |
| 1263 | if (*str == '\0') |
| 1264 | return 0; |
| 1265 | |
| 1266 | while (1) |
| 1267 | { |
| 1268 | if (! isdigit (*str)) |
| 1269 | return -1; |
| 1270 | |
| 1271 | while (isdigit (*str)) |
| 1272 | { |
| 1273 | val *= 10; |
| 1274 | val += (*str - '0'); |
| 1275 | str++; |
| 1276 | } |
| 1277 | |
| 1278 | if (*str == '\0') |
| 1279 | break; |
| 1280 | if (*str != '.') |
| 1281 | return -1; |
| 1282 | |
| 1283 | oid[len++] = val; |
| 1284 | val = 0; |
| 1285 | str++; |
| 1286 | } |
| 1287 | |
| 1288 | oid[len++] = val; |
| 1289 | *oid_len = len; |
| 1290 | |
| 1291 | return 0; |
| 1292 | } |
| 1293 | |
| 1294 | oid * |
| 1295 | smux_oid_dup (oid *objid, size_t objid_len) |
| 1296 | { |
| 1297 | oid *new; |
| 1298 | |
| 1299 | new = XMALLOC (MTYPE_TMP, sizeof (oid) * objid_len); |
| 1300 | oid_copy (new, objid, objid_len); |
| 1301 | |
| 1302 | return new; |
| 1303 | } |
| 1304 | |
| 1305 | int |
| 1306 | smux_peer_oid (struct vty *vty, char *oid_str, char *passwd_str) |
| 1307 | { |
| 1308 | int ret; |
| 1309 | oid oid[MAX_OID_LEN]; |
| 1310 | size_t oid_len; |
| 1311 | |
| 1312 | ret = smux_str2oid (oid_str, oid, &oid_len); |
| 1313 | if (ret != 0) |
| 1314 | { |
| 1315 | vty_out (vty, "object ID malformed%s", VTY_NEWLINE); |
| 1316 | return CMD_WARNING; |
| 1317 | } |
| 1318 | |
| 1319 | if (smux_oid && smux_oid != smux_default_oid) |
| 1320 | free (smux_oid); |
| 1321 | |
| 1322 | if (smux_passwd && smux_passwd != smux_default_passwd) |
| 1323 | { |
| 1324 | free (smux_passwd); |
| 1325 | smux_passwd = NULL; |
| 1326 | } |
| 1327 | |
| 1328 | smux_oid = smux_oid_dup (oid, oid_len); |
| 1329 | smux_oid_len = oid_len; |
| 1330 | |
| 1331 | if (passwd_str) |
| 1332 | smux_passwd = strdup (passwd_str); |
| 1333 | |
| 1334 | return CMD_SUCCESS; |
| 1335 | } |
| 1336 | |
| 1337 | int |
| 1338 | smux_header_generic (struct variable *v, oid *name, size_t *length, int exact, |
| 1339 | size_t *var_len, WriteMethod **write_method) |
| 1340 | { |
| 1341 | oid fulloid[MAX_OID_LEN]; |
| 1342 | int ret; |
| 1343 | |
| 1344 | oid_copy (fulloid, v->name, v->namelen); |
| 1345 | fulloid[v->namelen] = 0; |
| 1346 | /* Check against full instance. */ |
| 1347 | ret = oid_compare (name, *length, fulloid, v->namelen + 1); |
| 1348 | |
| 1349 | /* Check single instance. */ |
| 1350 | if ((exact && (ret != 0)) || (!exact && (ret >= 0))) |
| 1351 | return MATCH_FAILED; |
| 1352 | |
| 1353 | /* In case of getnext, fill in full instance. */ |
| 1354 | memcpy (name, fulloid, (v->namelen + 1) * sizeof (oid)); |
| 1355 | *length = v->namelen + 1; |
| 1356 | |
| 1357 | *write_method = 0; |
| 1358 | *var_len = sizeof(long); /* default to 'long' results */ |
| 1359 | |
| 1360 | return MATCH_SUCCEEDED; |
| 1361 | } |
| 1362 | |
| 1363 | int |
| 1364 | smux_peer_default () |
| 1365 | { |
| 1366 | if (smux_oid != smux_default_oid) |
| 1367 | { |
| 1368 | free (smux_oid); |
| 1369 | smux_oid = smux_default_oid; |
| 1370 | smux_oid_len = smux_default_oid_len; |
| 1371 | } |
| 1372 | if (smux_passwd != smux_default_passwd) |
| 1373 | { |
| 1374 | free (smux_passwd); |
| 1375 | smux_passwd = smux_default_passwd; |
| 1376 | } |
| 1377 | return CMD_SUCCESS; |
| 1378 | } |
| 1379 | |
| 1380 | DEFUN (smux_peer, |
| 1381 | smux_peer_cmd, |
| 1382 | "smux peer OID", |
| 1383 | "SNMP MUX protocol settings\n" |
| 1384 | "SNMP MUX peer settings\n" |
| 1385 | "Object ID used in SMUX peering\n") |
| 1386 | { |
| 1387 | return smux_peer_oid (vty, argv[0], NULL); |
| 1388 | } |
| 1389 | |
| 1390 | DEFUN (smux_peer_password, |
| 1391 | smux_peer_password_cmd, |
| 1392 | "smux peer OID PASSWORD", |
| 1393 | "SNMP MUX protocol settings\n" |
| 1394 | "SNMP MUX peer settings\n" |
| 1395 | "SMUX peering object ID\n" |
| 1396 | "SMUX peering password\n") |
| 1397 | { |
| 1398 | return smux_peer_oid (vty, argv[0], argv[1]); |
| 1399 | } |
| 1400 | |
| 1401 | DEFUN (no_smux_peer, |
| 1402 | no_smux_peer_cmd, |
| 1403 | "no smux peer OID", |
| 1404 | NO_STR |
| 1405 | "SNMP MUX protocol settings\n" |
| 1406 | "SNMP MUX peer settings\n" |
| 1407 | "Object ID used in SMUX peering\n") |
| 1408 | { |
| 1409 | return smux_peer_default (); |
| 1410 | } |
| 1411 | |
| 1412 | DEFUN (no_smux_peer_password, |
| 1413 | no_smux_peer_password_cmd, |
| 1414 | "no smux peer OID PASSWORD", |
| 1415 | NO_STR |
| 1416 | "SNMP MUX protocol settings\n" |
| 1417 | "SNMP MUX peer settings\n" |
| 1418 | "SMUX peering object ID\n" |
| 1419 | "SMUX peering password\n") |
| 1420 | { |
| 1421 | return smux_peer_default (); |
| 1422 | } |
| 1423 | |
| 1424 | int |
| 1425 | config_write_smux (struct vty *vty) |
| 1426 | { |
| 1427 | int first = 1; |
| 1428 | int i; |
| 1429 | |
| 1430 | if (smux_oid != smux_default_oid || smux_passwd != smux_default_passwd) |
| 1431 | { |
| 1432 | vty_out (vty, "smux peer "); |
| 1433 | for (i = 0; i < smux_oid_len; i++) |
| 1434 | { |
| 1435 | vty_out (vty, "%s%d", first ? "" : ".", (int) smux_oid[i]); |
| 1436 | first = 0; |
| 1437 | } |
| 1438 | vty_out (vty, " %s%s", smux_passwd, VTY_NEWLINE); |
| 1439 | } |
| 1440 | return 0; |
| 1441 | } |
| 1442 | |
| 1443 | /* Register subtree to smux master tree. */ |
| 1444 | void |
| 1445 | smux_register_mib (char *descr, struct variable *var, size_t width, int num, |
| 1446 | oid name[], size_t namelen) |
| 1447 | { |
| 1448 | struct subtree *tree; |
| 1449 | |
| 1450 | tree = (struct subtree *)malloc(sizeof(struct subtree)); |
| 1451 | oid_copy (tree->name, name, namelen); |
| 1452 | tree->name_len = namelen; |
| 1453 | tree->variables = var; |
| 1454 | tree->variables_num = num; |
| 1455 | tree->variables_width = width; |
| 1456 | tree->registered = 0; |
| 1457 | listnode_add_sort(treelist, tree); |
| 1458 | } |
| 1459 | |
| 1460 | void |
| 1461 | smux_reset () |
| 1462 | { |
| 1463 | /* Setting configuration to default. */ |
| 1464 | smux_peer_default (); |
| 1465 | } |
| 1466 | |
| 1467 | /* Compare function to keep treelist sorted */ |
| 1468 | static int |
| 1469 | smux_tree_cmp(struct subtree *tree1, struct subtree *tree2) |
| 1470 | { |
| 1471 | return oid_compare(tree1->name, tree1->name_len, |
| 1472 | tree2->name, tree2->name_len); |
| 1473 | } |
| 1474 | |
| 1475 | /* Initialize some values then schedule first SMUX connection. */ |
| 1476 | void |
paul | dd488a7 | 2003-06-19 01:21:07 +0000 | [diff] [blame] | 1477 | smux_init (struct thread_master *tm, oid defoid[], size_t defoid_len) |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1478 | { |
| 1479 | /* Set default SMUX oid. */ |
| 1480 | smux_default_oid = defoid; |
| 1481 | smux_default_oid_len = defoid_len; |
| 1482 | |
| 1483 | smux_oid = smux_default_oid; |
| 1484 | smux_oid_len = smux_default_oid_len; |
| 1485 | smux_passwd = smux_default_passwd; |
paul | dd488a7 | 2003-06-19 01:21:07 +0000 | [diff] [blame] | 1486 | |
| 1487 | /* copy callers thread master */ |
| 1488 | master = tm; |
paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1489 | |
| 1490 | /* Make MIB tree. */ |
| 1491 | treelist = list_new(); |
| 1492 | treelist->cmp = (int (*)(void *, void *))smux_tree_cmp; |
| 1493 | |
| 1494 | /* Install commands. */ |
| 1495 | install_node (&smux_node, config_write_smux); |
| 1496 | |
| 1497 | install_element (CONFIG_NODE, &smux_peer_cmd); |
| 1498 | install_element (CONFIG_NODE, &smux_peer_password_cmd); |
| 1499 | install_element (CONFIG_NODE, &no_smux_peer_cmd); |
| 1500 | install_element (CONFIG_NODE, &no_smux_peer_password_cmd); |
| 1501 | } |
| 1502 | |
| 1503 | void |
| 1504 | smux_start(void) |
| 1505 | { |
| 1506 | /* Schedule first connection. */ |
| 1507 | smux_event (SMUX_SCHEDULE, 0); |
| 1508 | } |
| 1509 | #endif /* HAVE_SNMP */ |